tag:blogger.com,1999:blog-1852405963110577862024-02-18T21:41:25.790-08:00MavbotMicro Air Vehicle ProfessionalsMavbothttp://www.blogger.com/profile/03370703236617919531noreply@blogger.comBlogger41125tag:blogger.com,1999:blog-185240596311057786.post-35745813974829891342014-12-06T01:49:00.000-08:002014-12-06T01:51:41.499-08:00Newly added Ztw items: Spider 30A Opto SMALL ESC and 3A UBECNewly added Zone Top Way items:<br />
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<strong>Ztw Spider 30A Opto SMALL 2-6S LiPo 600Hz SimonK ESC</strong></div>
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the same as the Spider 30A Opto ESC, but on a smaller board with improved heat dissipation, specifically designed to power multirotor aircraft motors,</div>
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and </div>
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<strong>Ztw 3A UBEC</strong></div>
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switching mode UBEC with 5V/3A or 6V/3A output depending on blue jumper position.</div>
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Check 'm both out at</div>
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<a href="http://www.mavbot.com/p/shop-new-additions.html">http://www.mavbot.com/p/shop-new-additions.html</a></div>
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<br />Anonymousnoreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-80226482432757988772014-11-26T23:03:00.002-08:002014-11-26T23:03:07.626-08:00Black Friday deal: 5% off all our T-MOTOR productsBlack Friday deal: 5% off all our <a href="http://www.mavbot.com/p/shop-t-motor.html">T-MOTOR products</a>, while supplies last. <br />
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<a href="http://1.bp.blogspot.com/-osO5voQ_1aE/VHbMJ3_n7OI/AAAAAAAAAEA/ZC5OggV2two/s1600/Mavbot_Facebook_Coverphoto-Sky%2Bcopy.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="http://1.bp.blogspot.com/-osO5voQ_1aE/VHbMJ3_n7OI/AAAAAAAAAEA/ZC5OggV2two/s640/Mavbot_Facebook_Coverphoto-Sky%2Bcopy.jpg" /></a></div>
Anonymousnoreply@blogger.com1tag:blogger.com,1999:blog-185240596311057786.post-71664118498323177492014-11-05T16:28:00.000-08:002014-11-05T16:28:51.661-08:00APM Octocopter Build First Test Flight<div style="text-align: center;">
<iframe allowfullscreen="" frameborder="0" height="360" src="//www.youtube.com/embed/yiGDpAvzwQU?rel=0" width="640"></iframe></div>
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This is the first test flight of our 1020-mm Octocopter build. It flew for 21 minutes on a charge. The batteries (2 x 5200 mAh 6S) are brand new, so maybe flight time will increase a little after the batteries are broken in a little.</div>
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Total weight (including batteries, but no camera/gimbal payload yet) is 5.0 kg.</div>
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Frame: Tarot T15</div>
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Flight Control: APM 2.6 with <span style="white-space: pre-wrap;">ArduCopter V3.2-rc14</span></div>
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Motors: <a href="http://www.amazon.com/gp/product/B00H5IHSKA" target="_blank">T-Motor MT4008 KV380</a></div>
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ESCs: <a href="http://www.amazon.com/gp/product/B00LZH7HLM" target="_blank">T-Motor 30A Opto</a></div>
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Mavbothttp://www.blogger.com/profile/03370703236617919531noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-70342809826052500202014-10-06T21:59:00.003-07:002014-10-06T22:02:02.948-07:00Back in stock: T-Motor MN2214 KV920 Version 2.0 boxed set of 4 motors for DJI Phantom 1 & 2 upgrade<span class="userContent">Back in stock: <a href="http://www.mavbot.com/p/shop-t-motor-mn2214-kv920-version-20.html" target="_blank">T-Motor MN2214 KV920 Version 2.0 boxed set of 4 motors for DJI Phantom 1 & 2 upgrade</a>. </span><br />
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<a href="http://3.bp.blogspot.com/-Dx4suhwxZ_I/VDIwMh9VLkI/AAAAAAAAADU/7_gGQ4URgMo/s1600/71lIEIu9K1L__SL1500_.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="http://3.bp.blogspot.com/-Dx4suhwxZ_I/VDIwMh9VLkI/AAAAAAAAADU/7_gGQ4URgMo/s1600/71lIEIu9K1L__SL1500_.png" height="420" width="640" /></a></div>
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<span class="userContent"></span><br />Mavbothttp://www.blogger.com/profile/03370703236617919531noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-80117595016039507542014-10-05T23:08:00.003-07:002014-10-06T21:57:22.125-07:00Limited amount of T-MOTOR U8 KV100 professional motors available<span class="userContent">Limited amount of T-MOTOR U8 KV100 professional motors - heavy duty, water and dirt resistant, now available in the <a href="http://www.mavbot.com/p/shop-motors-u-power-efficiency-series.html" target="_blank">U Power & Efficiency Series</a> (free Prime shipping with Amazon.com). </span><br />
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<a href="http://2.bp.blogspot.com/-Qkr1LJwfVE8/VCIjs6VpByI/AAAAAAAAACw/ZlCIRP6zuoI/s1600/81QRweZQfhL__SL1500_.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="http://2.bp.blogspot.com/-Qkr1LJwfVE8/VCIjs6VpByI/AAAAAAAAACw/ZlCIRP6zuoI/s1600/81QRweZQfhL__SL1500_.png" height="582" width="640" /></a></div>
<span class="userContent"></span><br />Anonymousnoreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-65879124028038985042014-09-23T19:00:00.000-07:002014-09-23T19:01:07.362-07:00Soon available: T-MOTOR U8 KV100 professional motors We'll soon have a limited amount of T-MOTOR U8 KV100 professional motors available - heavy duty, water and dirt resistant, for quad-, hexa- and octocopters up to 12kg, high efficiency for long flight times. $279.90 with free Prime shipping at Amazon.com.<br />
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To stay in the loop, drop us a line through <a href="http://mavbot.com/">our Contact Form</a> or Like <a href="https://www.facebook.com/mavbots" target="_blank">our Facebook Page</a>. </div>
Anonymousnoreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-26336409129812319632014-09-16T17:35:00.000-07:002014-09-16T17:35:18.400-07:00108 km/h SplineNav with Arducopter 3.2<a href="http://www.mavbot.com/2013/10/new-splinenav-03-smoother-yaw-and.html">SplineNav</a> is now a feature of the latest <a href="http://copter.ardupilot.com/" target="_blank">Arducopter</a>, version 3.2! <a href="https://www.youtube.com/channel/UCoHd-yaA6WoGHHVFeFb6rxg" target="_blank">Robert Lefebvre</a> posted this flight of his traditional helicopter flying a SplineNav circuit at 108 km/h:<br />
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Mavbothttp://www.blogger.com/profile/03370703236617919531noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-54826055831776076352014-09-10T19:52:00.000-07:002014-09-10T19:52:30.236-07:00Back in stock: PZ0420 600TVL D-WDR Color Board Camera with OSD Menu DNR Back in stock: PZ0420 600TVL D-WDR Color Board Camera with OSD Menu DNR
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Anonymousnoreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-32892706612090545952014-08-30T16:35:00.003-07:002014-08-30T16:35:35.765-07:00Back in stock: two T-MOTOR ESC's <span class="userContent">Back in stock are two T-MOTOR ESC's: </span><br />
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<a href="http://4.bp.blogspot.com/-S3oEM7vERxk/U-LKtD110MI/AAAAAAAAAAU/Y9sxxktxEMk/s1600/71PFqQjj8QL__SL1500_.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="http://4.bp.blogspot.com/-S3oEM7vERxk/U-LKtD110MI/AAAAAAAAAAU/Y9sxxktxEMk/s1600/71PFqQjj8QL__SL1500_.png" height="252" width="400" /></a></div>
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<span class="userContent"><span class="userContent">T-Motor T18A 2S-4S 400Hz ESC with 2A BEC</span></span></div>
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<span class="userContent"></span> </div>
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<span class="userContent">and</span></div>
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<span class="userContent"></span> </div>
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<a href="http://4.bp.blogspot.com/-ddk5crSt60A/U-LKv1p9luI/AAAAAAAAAAc/oXEmn1SHAkU/s1600/61IhxZRghEL__SL1500_.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="http://4.bp.blogspot.com/-ddk5crSt60A/U-LKv1p9luI/AAAAAAAAAAc/oXEmn1SHAkU/s1600/61IhxZRghEL__SL1500_.png" height="297" width="400" /></a></div>
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<span class="userContent"></span> </div>
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<span class="userContent">and T-Motor T30A Opto Pro 2S-6S 400Hz ESC</span></div>
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<span class="userContent"></span><br />
Anonymousnoreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-10995991975770833672014-08-06T17:50:00.003-07:002014-08-06T17:50:49.271-07:00Back in stock: T-MOTOR MN2206 KV2000 <span class="userContent">Back in stock: T-MOTOR MN2206 KV2000 High-Performance Brushless Electric Motor for Multi-Rotor Aircraft</span><br />
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Anonymousnoreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-60400452269473712122014-07-29T06:12:00.003-07:002014-07-29T06:12:43.734-07:00Back in stock: T-MOTOR 12x4 Carbon Fiber Props for Multi-Rotor Aircraft and T-MOTOR 9x3 Gloss Black Carbon Fiber Props for DJI Phantom
<a href="http://www.mavbot.com/back-in-stock.html">http://www.mavbot.com/back-in-stock.html</a><br />
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Mavbothttp://www.blogger.com/profile/03370703236617919531noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-61534647134521956392014-07-26T18:13:00.000-07:002014-07-29T06:06:06.130-07:00Back in stock: six T-MOTOR High-Performance Brushless Electric Motor for Multi-Rotor Aircraft:
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MT3506 KV650<br />
MN1806 KV1400<br />
MN1806 KV2300<br />
MN3508 KV380<br />
MN3508 KV580<br />
MN3510 KV360. <br />
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<a href="http://www.mavbot.com/back-in-stock.html">http://www.mavbot.com/back-in-stock.html</a><br />
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Anonymoushttp://www.blogger.com/profile/02384654739461736331noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-31821443973722393752014-07-12T05:16:00.000-07:002014-07-28T07:57:29.602-07:001.3GHz FPV with High-Gain Helical AntennaWe usually look for a high or open spot to stand when flying long-range FPV to avoid our signal being attenuated by obstacles. This allows us several kilometers of range in the countryside without needing a directional (high gain) antenna. Sometimes you might not have such an ideal spot to fly from though, so it helps to use an antenna with a narrow beam to focus that weak signal.
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We attached a handle, video receiver, and battery to the back of this Circular Wireless helical antenna so it could be held by one person and manually pointed toward the copter, while the other person flies FPV:
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<tr><td class="tr-caption" style="text-align: center;"><i>Circular Wireless Heliaxial 1.3GHz antenna with video receiver, battery, and handle mounted to back</i></td></tr>
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On the video tx side we used the <a href="http://www.amazon.com/Circular-Wireless-SPW12-Planar-Antenna/dp/B00L3XGKRU/" target="_blank">Circular Wireless Skew Planar Wheel</a>. In our long-range mountain flying test, we started from a low point near the base of the valley, in a location with obstacles such as trees and buildings. We were still able to fly over 2.0 km away with a clear video signal.
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<i>Flew FPV in the mountains of Changhua to a peak 2.0 km away.</i>
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A drawback of the Heliaxial is that it is bulky, needs to be transported carefully to avoid breakage, and is probably too heavy to be mounted to most antenna trackers.
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Fortunately, Circular Wireless has come out with a new <a href="http://www.amazon.com/Circular-Wireless-CPATCH12-Circularly-Polarized/dp/B00L3XGOYE/" target="_blank">Circularly Polarized 1.3GHz Patch Antenna</a> that should be much more convenient. We plan to test it out on a flight soon!
Mavbothttp://www.blogger.com/profile/03370703236617919531noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-54137887177762653242014-07-01T20:16:00.000-07:002014-07-01T20:16:09.376-07:00Two antennas from Circular Wireless now in stockTwo antennas from Circular Wireless now in stock: CPATCH12 Circularly Polarized 1.2 GHz / 1.3 GHz Patch Antenna and SPW12 Skew Planar Wheel 1.2 GHz / 1.3 GHz FPV Antenna <a href="http://www.mavbot.com/p/shop-new-additions.html">http://www.mavbot.com/p/shop-new-additions.html</a> Anonymoushttp://www.blogger.com/profile/02384654739461736331noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-56269332391715381662014-06-04T17:47:00.001-07:002014-06-04T17:51:24.752-07:00Now available: two T-Motor motors for Professional Multi-Rotor AircraftTwo T-Motor motors for Professional Multi-Rotor Aircraft were added to our assortment: the U5 KV400 High-Power Brushless Motor ......<br />
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... and the U8 KV135 High-Efficiency Brushless Motor .....<br />
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... check out our Shop's new additions at <a href="http://www.mavbot.com/p/shop-new-additions.html" rel="nofollow nofollow" target="_blank">http://www.mavbot.com/p/shop-new-additions.html</a> <br />
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<br />Anonymoushttp://www.blogger.com/profile/02384654739461736331noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-80514352790031470762014-04-26T15:05:00.000-07:002014-04-26T15:12:46.596-07:001.4 km away, FPV Touch-and-Go behind Hill in Rain...<div style="text-align: center;">
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<i>Flew in the rain 1.4 km away over a hill and did an FPV touch-and-go... followed by a 2-km SplineNav scenic flight back, and near electrocution of the copter (oops!)—and all of that in one single epic flight!</i>
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It's very hard to get good FPV range flying near the city: even with 1.3GHz and a high-gain (directional) antenna on the receiver, we only get about 1 km range hugging the terrain (much longer range is available flying high, but that doesn't make for as interesting videos).<br />
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So we headed out to the countryside to find radio quiet, and left the bulky high-gain antenna at home. With just a Circular Wireless SPW12 on both tx and rx, we were able to fly 1.4 km away, duck behind a hill, make a touch-and-go, and still get perfect video back the whole time.<br />
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Unfortunately the video still doesn't work well flying behind broad-leaf trees, even at much shorter ranges. Evergreen needle trees don't seem to be a problem though, perhaps due to their lower moisture content. We're now using a Lawmate 1000mA 1.3 GHz transmitter, which seems to work a lot better than the ReadyMadeRC tx, and is much lighter. We use RangeLink UHF for radio control, which seems to be pretty much invincible at any distance.<br />
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After doing the the touch-and-go on the grassy hill 1.4 km away, we engaged SplineNav and did a 2-km scenic flight back on autopilot. The rain was really picking up, and moisture got into the gimbal electronics, which made the GoPro twitch wildly from time to time, but otherwise the water didn't cause any harm.<br />
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Note the temple with the four characters 周氏宗祠 we fly over at 5:18. That's where my wife attended elementary school, long since abandoned and with trees growing up inside it.<br />
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The change in weather on the flight back seems to have affected the barometer, because where SplineNav was supposed to have gone under that last power line, it went straight through inside. Really amazing that it made it through that narrow gap with no damage other than a split prop tip. These high-voltage wires are bare of insulation and carrying the power for the whole village. Fortunately the electricity didn't arc across right through the aluminum arms of the copter! Mavbothttp://www.blogger.com/profile/03370703236617919531noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-17336261586880249242014-03-23T18:54:00.001-07:002014-03-23T18:54:57.045-07:00Several items back in stock upon request<a href="http://www.mavbot.com/p/blog-page_23.html">Several items</a> are back in stock upon request:
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T-Motor MT2216 KV1100 V2
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T-Motor MT2814 KV770
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T-Motor MT4008 KV380
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T-Motor 9x3 Gloss White Carbon Fiber Props for DJI Phantom
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T-Motor 15x5 Carbon Fiber Props
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Anonymoushttp://www.blogger.com/profile/02384654739461736331noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-51614367176792835242014-03-17T00:38:00.001-07:002014-03-17T00:38:53.331-07:00Back in stock: <a href="http://www.mavbot.com/p/shop_17.html">3D Robotics APM 2.6</a> with GPS/Compass and Power Module, side pins @ $249.98
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Anonymoushttp://www.blogger.com/profile/02384654739461736331noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-74334824710288920192014-02-26T22:24:00.000-08:002014-02-26T22:57:03.239-08:00Back in stock: T-Motor MT2212 KV980Back in stock: TIGER T-Motor <a href="http://www.mavbot.com/p/shop-mt2212-kv980.html">MT2212 KV980</a> high-performance brushless electric motor for multi-rotor aircraft @ $44.90. <br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEinrqJGr3_P_909mqsQ5lb4Sa-wpyte9YsuT9PwUmws-K2yVH_19N1M6dEm78vfIChLohUXty0rYGXWMfLGTxlTCbLRW5n0XN1mjmTuhJBAYC6qietQ6ic0W6wfroDz0V_cvR-I_DcWGtVo/s1600/package_iso.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEinrqJGr3_P_909mqsQ5lb4Sa-wpyte9YsuT9PwUmws-K2yVH_19N1M6dEm78vfIChLohUXty0rYGXWMfLGTxlTCbLRW5n0XN1mjmTuhJBAYC6qietQ6ic0W6wfroDz0V_cvR-I_DcWGtVo/s400/package_iso.jpg" height="457" width="640" /></a>Anonymoushttp://www.blogger.com/profile/02384654739461736331noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-91148101593114168152014-02-22T19:37:00.001-08:002014-02-22T19:37:51.108-08:00Back in stock: Circular Wireless FPV AntennasBack in stock in <a href="http://www.mavbot.com/p/shop-antennas.html">Mavbot's Shop</a>: Circular Wireless HELIAXIAL58 Helical Axial Mode 5.8 GHz (@ $84.95) and SPW58 Skew Planar Wheel 5.8 GHz (@ $44.95) FPV Antennas
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Anonymoushttp://www.blogger.com/profile/02384654739461736331noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-59467359260936916132014-02-07T20:19:00.002-08:002014-02-07T20:19:48.449-08:00Two ESC's (Electric Speed Controllers) now availableTwo ESC's (Electric Speed Controllers) are now available in our <a href="http://www.mavbot.com/p/shop-escs.html">Mavbot shop</a>, starting @ $16.40 <br />
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Anonymoushttp://www.blogger.com/profile/02384654739461736331noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-61533004258956940472014-01-28T04:56:00.000-08:002014-01-28T04:56:59.660-08:00First Flight with GoPro Hero 3+ Black<div style="text-align: center;">
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The colors are quite drab and dreary in the mountains over the winter, and filming with the GoPro Hero 3 Silver just makes the colors even more washed out. So we swapped it out for the GoPro Hero 3+ Black, hoping to get some more vibrant, true-to-life color in our videos.<br />
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This was literally our first ever flight with this brand-new GoPro, so I was flying conservatively, not wanting to make a mistake that would result in lens scratches on the new camera, or worse. So sorry I didn't get in closer to that massive ridge of granite going up the mountainside. Maybe next time!<br />
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The winds were very high through this valley today, the GoPro was in Narrow FOV mode (1080p @ 60 FPS), and the gimbal only stabilizes pitch and roll, so those factors combined to create a whole lot of shakiness in the yaw axis. So although we were very impressed by the image quality in Narrow mode, it looks like for future flights we'll want to stick to Medium FOV. That is until we can get a 3-axis gimbal for our GoPro.<br />
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The colors certainly came out a lot better than with the old GoPro, but since there was so much haze and leafless or frostbitten vegetation, the video still came out looking fairly dreary and lacking in color. Good thing Spring is almost here!Mavbothttp://www.blogger.com/profile/03370703236617919531noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-37392290621003909942014-01-22T14:49:00.000-08:002014-01-30T22:15:54.922-08:00WIN a FREE HoverThings Flip FPV Frame with a $136.95 Retail ValueStarting Wednesday, January 22, 2014 and ending Saturday, February 1, 2014 (23:59 PST), MavBot is running a Facebook Page Promotion 'WIN a FREE HoverThings Flip FPV Frame with a $136.95 Retail Value' at <a href="http://bit.ly/1f7sRKz" target="_blank">http://bit.ly/1f7sRKz</a> . This page contains this Promotion's Official Rules.<br />
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'WIN a FREE HoverThings Flip FPV Frame with a $136.95 Retail Value' Sweepstakes - OFFICIAL RULES <br />
<br />
NOTE<br />
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This promotion is in no way sponsored, endorsed or administered by, or associated with, Facebook. Participants are providing information to MavBot and not to Facebook. The information provided will only be used for administering and communicating with participants about MavBot and the MavBot promotion they are participating in. <br />
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SWEEPSTAKES DESCRIPTION<br />
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Mavbot is giving away a FREE HoverThings Flip FPV Frame with a $136.95 Retail Value: a frame designed with TWO things in mind: strength and simplicity. The "FLIP FPV" is incredibly stiff and light, yet STRONG. The arms do not twist like cheap plastic arms, and they do not bend like expensive aluminum arms. It includes "snap-on" landing gear that can be installed and removed in seconds.<br />
<br />
SWEEPSTAKES PERIOD<br />
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The Sweepstakes entry period begins at 19:00 p.m. PST on January 22, 2014 and ends at 11:59 p.m. PST on February 1, 2014 (the "Sweepstakes Period"). Winners will be randomly selected within 24 hours, from entries properly submitted and timely received during the Sweepstakes Period.<br />
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PRIZE DETAILS <br />
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Prize: HoverThings Black/Orange Flip FPV Frame with a $136.95 Retail Value.<br />
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Prize will be delivered free of charge to the participant's street address as submitted at registration for the Sweepstakes. Prize will not be replaced if lost or stolen, is not transferable and is not redeemable for cash. All taxes and other charges are responsibility of the winner. No substitutions are allowed. Prize is valid for redemption up till three (3) months after prize is drawn. If prize is not initially redeemed during this period then the prize shall be voided. All expenses not specifically mentioned herein are not included as part of any Prize package, and are solely the winner's responsibility. <br />
<br />
ELIGIBILITY<br />
<br />
MavBot (Sponsor) Facebook Page Sweepstakes (the Sweepstakes) is open only to legal residents of the fifty (50) United States and the District of Columbia over the age of 18 with access to the Internet at all times during the Sweepstakes and subsequent prize-award period. All employees of MavBot, Lizara Freezone N.V. or its subsidiaries, all associated agencies and each of their respective affiliates, sales representatives, distributors, licensees or agents (all of the foregoing, together with Sponsor, collectively referred to as Sweepstakes Entities), and their immediate family members (spouse, parent, child, sibling and their respective spouses) and those living in the same household of each (whether related or not), are ineligible to participate in the Sweepstakes. All applicable federal, state and local laws and regulations apply. Void where prohibited or restricted by law. Entry in the Sweepstakes constitutes full and unconditional acceptance of these Official Rules. No purchase is necessary to participate in the Sweepstakes and a purchase will not improve the chances of winning. <br />
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SWEEPSTAKES ENTRY INSTRUCTIONS<br />
<br />
During the Sweepstakes Period, participant may submit an entry form online using the sweepstakes entry form located on MavBot's Facebook Sweepstakes tab. Limit one (1) online entry per email address.<br />
<br />
PUBLICITY<br />
<br />
As a condition of entry into the Sweepstakes, except where prohibited by law, each entrant, and each winner by accepting a prize, grants to Sponsor and its affiliates, legal representatives, assigns and licensees, all right, title and interest in to publicize, broadcast, display and/or otherwise use the Sweepstakes entrants name, city, state, and biographical material (collectively, Licensed Rights) in any media now or hereafter known throughout the world in perpetuity for advertising and publicity purposes, without additional review, compensation, permission or approval of the winner. Where necessary, the winner will be required to execute and return an Affidavit of Eligibility/Liability and Publicity Release within five (5) business days of attempted notification or the winner may be disqualified and an alternate winner selected.<br />
<br />
SELECTION OF SWEEPSTAKES WINNERS/ODDS<br />
<br />
The potential Prize winners will be selected in a random drawing. Winners will be selected from entries received during the Sweepstakes Period who have not yet won a prize. Odds of winning will depend on the number of eligible entries received during the Sweepstakes Period prior to each drawing. The potential winner will be notified via email to the email address submitted with the potential winners entry within three (3) days after the drawing. The drawing will be conducted by Sponsor, the judge of the Sweepstakes, whose decisions on all matters relating to the Sweepstakes shall be final and binding. In the event that a potential winner is disqualified for any reason, Sponsor may, in its sole discretion, award the applicable prize to an alternate winner selected at random. Any return of prize notification or prize email as undeliverable will result in forfeiture of any prize and an alternate winner may, at Sponsor's discretion, be randomly selected. <br />
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MavBot / Lizara Freezone N.V., Frankrijkstraat 13, Oranjestad, Aruba.Anonymoushttp://www.blogger.com/profile/02384654739461736331noreply@blogger.com0tag:blogger.com,1999:blog-185240596311057786.post-48209443885634189762014-01-21T01:15:00.000-08:002014-01-21T01:21:52.812-08:001.3 GHz FPV Testing<div class="separator" style="clear: both; text-align: center;">
<iframe width="640" height="360" src="//www.youtube.com/embed/ByZVDltPYD4?rel=0" frameborder="0" allowfullscreen></iframe></div>
Although our <a href="http://www.mavbot.com/2013/09/longer-range-fpv-for-cheap.html" target="_blank">5.8 GHz FPV</a> setup works fairly well, I would prefer a video system that doesn't get all scrambled just flying behind a few trees, and that has much better range than just 2 km.<br />
<br />
I thought we could do better with 1.3 GHz, so we've been experimenting with that. The first major test was this flight a bit over 2 km up a mountain valley near Baiguo.<br />
<br />
1.3 GHz FPV Equipment used:<br />
<br />
<a href="http://www.circular-wireless.com/en/products-page/skew-planar-wheel/spw12r/" target="_blank">2x Circular Wireless 1.3 GHz SPW12 Skew Planar Wheel antennas</a><br />
<a href="http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=11_30_38&products_id=914" target="_blank">ReadyMadeRC 800mW 1300MHz Transmitter (2-channel US-legal version)</a><br />
<a href="http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=11_34_44&products_id=911" target="_blank">ReadyMadeRC 900MHz-1.3Ghz Receiver SAW w/1258 Custom RMRC Version 3</a><br />
<a href="http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=11_45_232&products_id=484" target="_blank">ReadyMadeRC Low Pass Filter for 1.3GHz Antennas</a> (on vtx to help prevent GPS dropout)<br />
<br />
Unfortunately, my tests so far have shown that the range is about the same as we used to get with 5.8 GHz and the <a href="http://www.amazon.com/Circular-Wireless-HELIAXIAL58-Helical-Antenna/dp/B00GP5E9P6" target="_blank">Circular Wireless 5.8 GHz helical antenna</a>. Of course it is nice to no longer have to keep turning your head to track the aircraft, but I'd prefer a solution where I can fly behind a few trees without losing most of the video signal. And in terms of that, 1.3 GHz FPV seems to be performing even more poorly than 5.8 GHz. At least with 5.8 GHz I could fly behind maybe 6 to 10 trees before losing the signal completely. But in recent 1.3 GHz tests I lose the signal through just a couple of the same trees, and get glitches in the video just flying behind a single tree only 50 meters away!<br />
<br />
So what's going on here that 1.3 GHz seems to have such poor tree penetrating power compared to 5.8, when supposedly it should actually be better? Interestingly, I've noticed the 1.3 GHz does penetrate concrete walls and rocks quite well, in fact much better than 5.8 GHz! So it's only trees in particular that seem to not like 1.3 GHz and prefer 5.8 GHz instead!<br />
<br />
So if I want to reach my goal of flying FPV through trees with good video, maybe I'll need to try a high-gain antenna and an antenna tracker with 1.3 GHz, or perhaps move to 900 MHz video.<br />
<br />Mavbothttp://www.blogger.com/profile/03370703236617919531noreply@blogger.com5tag:blogger.com,1999:blog-185240596311057786.post-16008571815333777072013-10-30T01:12:00.000-07:002013-10-30T02:20:09.079-07:00New SplineNav 0.3: Smoother Yaw, and Manual Yaw Override<div style="text-align: center;">
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</div>
<br />
After a few months of hard work, SplineNav 0.3 is now ready to fly! This SplineNav release started with the goal of simply reducing the yaw jitter issues of SplineNav 0.2, but in the end it turned into a major rewrite of the code.<br />
<br />
<h3>
New Features:</h3>
<div>
<br /></div>
<ul>
<li>Smoother Yaw: Updates x and y spline derivative calculations faster, in a separate loop, for a more precise yaw control. Uses a fast approximation of the atan2 function to compute the yaw angle from the spline derivative.</li>
<li>Features yaw rate smoothing for much smoother video, avoiding the small yaw "jerk" at each waypoint.</li>
<li>Allows manual override of yaw control, then takes back auto control of yaw if the pilot centers the stick when yaw is directed approximately in the direction of the spline curve.</li>
<li>Now enters SplineNav mode smoothly, without an initial jerk.</li>
<li>Uses it's own flight mode, so unlike SplineNav 0.2 it doesn't override your Circle mode. To use SplineNav 0.3, set one of your FLTMODE parameters to 14 in the Full Parameter List.</li>
</ul>
<h3>
</h3>
<h3>
SplineNav Waypoints</h3>
<div>
<br /></div>
We collected the waypoints for this video while flying FPV, and flipping the channel 8 switch at each point to record. Then we loaded the waypoints into Mission Planner, and made some small adjustments:<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYLe2K4jbeYTxhn-8-ZIpoYkhH7F0Fp48tACSlal3cqfJO5-sekO9hYSJdAFDWSONzzBAoqLIRmTc88bBQQFDH-v-PupeYeP683KgxkrYAlh4IHmAWT1nYnBtNMiU84PE7ALBCV-8-vhEg/s1600/waypoints.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="361" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYLe2K4jbeYTxhn-8-ZIpoYkhH7F0Fp48tACSlal3cqfJO5-sekO9hYSJdAFDWSONzzBAoqLIRmTc88bBQQFDH-v-PupeYeP683KgxkrYAlh4IHmAWT1nYnBtNMiU84PE7ALBCV-8-vhEg/s640/waypoints.png" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Waypoints recorded during FPV flight and adjusted in Mission Planner</i></td></tr>
</tbody></table>
<br />
The GPS track indicates it hit all the waypoints quite precisely, on each lap for a total of 3 laps (72 waypoints in total):<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiACSpc8CUFuJKr-5wV0YzGUP_ywO3J4Mt18RvDOjBJP1xKHCqMeTuUz7qdxxdduol2-qlfbYl6iPJkvsiWh3pkdDAs6sAPWNqd-xWhsH7LDOxRZVr-G-UBWCiqzlFmgKDxuMmg9NWGQKx_/s1600/splinenav_track.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="332" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiACSpc8CUFuJKr-5wV0YzGUP_ywO3J4Mt18RvDOjBJP1xKHCqMeTuUz7qdxxdduol2-qlfbYl6iPJkvsiWh3pkdDAs6sAPWNqd-xWhsH7LDOxRZVr-G-UBWCiqzlFmgKDxuMmg9NWGQKx_/s640/splinenav_track.png" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>GPS track from dataflash log shows SplineNav hitting each waypoint precisely over 3 complete laps</i></td></tr>
</tbody></table>
The waypoints had a range of altitudes set, from 7 to 35 meters. Here is the flight profile from the autopilot logs, imported into Google Earth:<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvtLHZHdz13XfcTr20uIG8B_nz0d3x_hZDZo9fAroxDVCQqgIOX0F1HMuzZYeiLHA_sHTaoBPBBXf9WBYFHrpVHPbEVXOJuvabWye8sglychcr_SIxl0HdtIz2ZeapbZBf3Vwo2wKkxazc/s1600/GPS_profile.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="284" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvtLHZHdz13XfcTr20uIG8B_nz0d3x_hZDZo9fAroxDVCQqgIOX0F1HMuzZYeiLHA_sHTaoBPBBXf9WBYFHrpVHPbEVXOJuvabWye8sglychcr_SIxl0HdtIz2ZeapbZBf3Vwo2wKkxazc/s640/GPS_profile.png" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>GPS flight profile from dataflash logs after 3 complete laps</i></td></tr>
</tbody></table>
<br />
<div class="separator" style="clear: both; text-align: center;">
</div>
<h3>
Hardware Used:</h3>
<div>
<br /></div>
<b>Airframe</b>: 3D Robotics Quad, with some modifications.<br />
<b>
Autopilot</b>: 3DR APM 2.6, with external compass/GPS module<br />
<b>
Motors</b>: <a href="http://www.amazon.com/T-Motor-MT2216-800KV-high-performance-multi-rotor/dp/B00C1V7N1K">T-Motor MT2216 KV800</a><br />
<b>
Props</b>: APC 11x4.7<br />
<b>
Gimbal</b>: WIND-1 two-axis brushless<br />
<b>
Camera</b>: GoPro Hero 3 Silver<br />
<b>
Telemetry</b>: 3DR 433 MHz<br />
<b>
R/C</b>: FlySky TH9X(ER9X FW) + 2.4GHz FrSky DJT module + V8R7-II rx<br />
<b>
FPV</b>: ImmersionRC 5.8GHz 600mA + FatShark Predator + <a href="http://www.amazon.com/SecurityCamera2000-CMQ1993X-Super-600TVL-Camera/dp/B00DK2ELQO" target="_blank">SecurityCamera2000 CMQ1993X</a><br />
<b>Also</b>: These <a href="http://http//www.mavbot.com/2013/09/longer-range-fpv-for-cheap.html">mods for longer range FPV</a>.<br />
<br />
<h3>
SplineNav 0.3 Firmware Installation:</h3>
<ol>
<li>First make sure your quad copter is flying well with ArduCopter version 3.0.1, since SplineNav 0.3 is based on this firmware version.</li>
<li>Go to <a href="https://github.com/mavbot/SplineNav">https://github.com/mavbot/SplineNav</a>, and click the "Download ZIP" link.</li>
<li>In the special Ardupilot version of Arduino, go to File -> Preferences and set your sketch directory to the path of the "SplineNav-SplineNav-0.3" directory from the extracted zip archive.</li>
<li>Restart Arduino, then choose File -> Sketchbook -> ArduCopter from the menu.</li>
<li>From the ArduPilot menu, make sure your HAL Board is set correctly.</li>
<li>Connect your copter's APM via USB, and from Arduino's Tools menu make sure the serial port is set correctly.</li>
<li>Click the Upload arrow button and wait for the code to compile and upload to your APM.</li>
<li>Set one of your FLTMODE parameters to 14 in Mission Planner's Full Parameter List, Set your waypoints (either with Mission Planner or with the channel 7 or 8 switch), then go fly!</li>
</ol>
<div>
Note: If you have any special requirements, such as a frame or orientation other than quad X, remember to make those adjustments in the code before compiling. Or if you'd rather not compile yourself, please contact us to get a hex file you can upload directly via Mission Planner.</div>
<h3>
</h3>
<h3>
Parameters:</h3>
<div>
<br /></div>
Here are the speed and acceleration parameters we used for this video (set in Mission Planner):<br />
<br />
<b>WPNAV_SPEED</b>: 1350 cm/s<br />
This should make SplineNav go about 49 km/h on straight segments.<br />
<b><br /></b>
<b>WPNAV_SPEED_UP</b>: 1000 cm/s<br />
<b><br /></b>
<b>WPNAV_SPEED_DN</b>: 650 cm/s<br />
<b><br /></b>
<b>WPNAV_LOIT_SPEED</b>: 1500 cm/s<br />
Should be set higher than WPNAV_SPEED.<br />
<b><br /></b>
<b>WPNAV_ACCEL</b>: 180 cm/s/s<br />
Nice low value for a smooth steady start.<br />
<br />
Also, the following parameters are #defines in the splinenav.h source code, and can be changed at compile time:<br />
<b><br /></b>
<b>SPLINE_TENSION</b>: 1.6<br />
Higher tension splines curve more tightly at waypoints, but straighter in between waypoints. A tension value of 2 makes it a Catmull-Rom spline. We found that slightly lower tensions tend to give nice loose curves for smooth aerial video.<br />
<br />
<b>SPLINE_CURVE_ACCEL_MULTIPLE</b>: 2.0<br />
This allows for twice the max curve acceleration as set in the WPNAV_ACCEL parameter. Added this parameter to allow for smooth slow starts without making tight curves overly sluggish.<br />
<br />
<b>SPLINE_JERK</b>: 200.0 cm/s/s/s<br />
Jerk is the maximum rate that SplineNav increases or decreases acceleration as it flies the curve.
<br />
<b><br /></b>
<b>SPLINE_LOOP</b>: true<br />
This makes SplineNav loop the waypoints forever until you exit out into another mode.<br />
<br />Mavbothttp://www.blogger.com/profile/03370703236617919531noreply@blogger.com0