We continue to experiment with different airframes for Conservation Drones. There clearly is no one-size-fits-all solution. And there is a stark tradeoff between portability/size and long-distance capability.
*Important: whatever airframe you choose to fly with, it is critical to tune it properly:
- Tuning in general: http://plane.ardupilot.com/wiki/flying/tuning/
- Roll, Pitch and Yaw: http://plane.ardupilot.com/wiki/roll-pitch-controller-tuning/
- Navigation: http://plane.ardupilot.com/wiki/navigation-tuning/
- Total Energy Control System: http://plane.ardupilot.com/wiki/tecs-total-energy-control-system-for-speed-height-tuning-guide/
Conservation Drones 3DR Iris+
Multirotors, like 3DR‘s Iris+, allow for very high resolution data collection because they can fly so low and very slowly. The tradeoff is that they have less flight duration than fixed wings, but both are important tools for conservation work. The Iris+ can carry many different payloads (like GoPros, still cameras, stabilization gimbals) that are easy to swap out relative to fixed wings. Deployed in various locations throughout the globe, the Iris+ was recently used to ground truth chimpanzee nest observations in Tanzania, in collaboration with the Jane Goodall Institute and the Ugalla Primate Project.
Conservation Drones X5
The X5 is a robust flying wing design useful for flying long missions under difficult conditions. It is of similar size to the FX-61, but flies faster, giving it greater range but at a higher altitude. Typically it is equipped with a Canon S100 or similar models. It can be spec built by both Hornbill Surveys and ReadyToDrone to, in some cases, fly up to 1 hour and 15 minutes. This model is currently deployed with the Jane Goodall Institute and the Ugalla Primate Project in various locations.
Conservation Drones FX-61
The FX-61 is a modular ‘swept-wing’ (or delta wing) design optimized by Brenden Duffy, of ReadyToDrone and a Technical Director at Conservation Drones. International models can also be sourced from technical director Keeyen Pang of Hornbill Surveys. This mid-sized drone breaks down into three pieces for easy transport and is very stable in flight for a delta wing. I can carry a slightly larger payload than the Vanguard and flies for about 45 minutes. Developed for use in supporting Conservation International’s ongoing work in Suriname.
Conservation Drones Vanguard MK
The ‘Vanguard’ MK is a series of larger ‘swept-wing’ designs by Simon Wunderlin, Technical Director of ConservationDrones.org. They are developed with support from the AREAS Programme of WWF International. Since version MK III, the Vanguard drone has a wingspan of 1.4 m, a payload of up to about 300 g, and a flight time of about an hour.
Conservation Drones Caipy
The ‘Caipy’ is a Conservation Drone model developed with support from the AREAS Programme of WWF International. This drone is based on the TBS Caipirinha airframe, and hence the moniker ‘Caipy’. Its main features include extreme portability (only 850 mm wingspan), low weight and inertia (650 g) and hence minimal damage on any impact, and easy to hand-launch. The caipy has a flight time of about 25 minutes.
Conservation Drones Skywalker 2014
The Skywalker 2014 is a popular airframe among the FPV community (First Person View) for its large fuselage space, stable and efficient flight and overall robustness to hard landings. Keeyen Pang, who is part of our Asia Team, builds Skywalker-based conservation drones for sale. Please contact him at HornBillSurveys.com for more information.
Conservation Drones Techpod
The Techpod is a new airframe designed by Wayne Garris for his KickStarter project and is now available at his store. Wayne spent many hours refining the aerodynamics of this airframe. We tested it in Belize over open ocean and wind conditions of 30-40 km per hour. It is a very impressive 2.5 m-wingspan airframe.
Conservation Drones Penguin
The Finwing Penguin airframe is a stable platform for conservation applications. Its main advantage over the previous airframes we had tried is that it has a built-in landing gear. This makes take off and landing in wide open spaces very smooth and safe. The penguin also has a respectable fuselage space.
Please see this post for video footage of the penguin.
Conservation Drones Maja
The Bormatec-MAJA airframe is designed by a German company specifically for UAV use.
Although this airframe is more expensive than previous models of Conservation Drones, the Maja has several unique features that are well worth its cost. For one, the top half of the entire length of Maja’s fuselage fully opens like a hatch to expose a huge storage area, allowing easy installation, access and manipulation of onboard equipment in the field, including the autopilot, batteries and camera. The airframe itself weighs about 2.0 kg (including ~900 g of batteries), and can carry a payload of another 1.0 kg. This essentially allows the Maja to carry both video and still-photo cameras. The Maja can be fitted with either 1.8 m or 2.2 m wings, depending on payload and range requirements. Our test model was fitted with the latest autopilot system from 3DRobotics, an external GPS module, all metal-gear servos, telemetry and two 5000 mAh battery. However, what has gotten us most excited about the Maja is that, due to its superb flight characteristics the Maja drone can perform fully autonomous landing within a 100 x 100 m landing area.
Conservation Drone Skywalker
Another promising candidate is the Condor Skywalker 1880. The main motivation to experiment with the Skywalker is to improve flying time and range. The main advantage of the Skywalker over the Raptor and Bixler drones is that the Skywalker has massive fuselage and wing area. Furthermore, a side door can be cut out from the fuselage to facilitate initialization of the autopilot and camera prior to each flight. *Note that there are more recent models of the Skywalker that are just as successful. For example, HornbillSurveys.com builds a modular Skywalker 2013.
An initial test using two 3S 20C 4000 mAh batteries connected in parallel (8000 mAh total), with an additional dummy weight of 200 g (simulating a GoPro camera payload) suggests a total flight time of ~70 min. That test flight was achieved with a Turnigy D3536/8 1000 KV motor spinning a TGS 9x6E propeller, regulated by a 50A speed controller, and had an All-Up-Weight (AUW) of 2.2 kg (~900 g of payload). If programmed to fly at a speed of 12 m/s, the total range of the Skywalker-based Conservation Drone would be close to 50 km!
Conservation Drone Raptor
Conservation Drone Raptor is based on another popular remote control model plane, known as the FPV Raptor, which has a 2 meter wingspan (the Bixler had a 1.4 meter wingspan). We equip this drone with a much bigger 5000 mAh battery pack, which gave it a longer flight time of up to ~50 minutes. When programmed to fly at a speed of ~10 m/s, the drone can cover a total distance of almost 30 km.
Conservation Drone Bixler: The Prototype
We based our prototype drone on a popular model airplane (Hobbyking Bixler). This airplane is relatively inexpensive (<$100), lightweight (650g), and has ample room within its fuselage for installing the autopilot and an on-board camera. During our field tests, the drone was powered by a 2200 mAh (milliampere-hour) battery, which allowed it to fly for ~25 minutes per mission, and over a total distance of ~15 km.
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Serge — I really do want to order one of these drones to bring out here to Kenya. I have emailed you today about this and I have a somewhat narrow window of opportunity. Could you please get back to me here in Kenya on +254722618865 or contact Howard Frederick on +15203444471. Many thanks, Mike N-G
Amazing stuff well done!
I noticed that you say the FPV Raptor you use has a 2.0m wing span but the link has a 1.6m wing span…have you replaced the wings with bigger ones? Cheers, AD
Hi AD, thanks. There are two versions of the raptor available in the market. We have tried both and they work well. But we usually use the 2m version.
Thanks guy! We are monitoring the endangered Steller’s Sea Eagles in Siberia using UAV (arducopter) http://www.youtube.com/watch?v=-qGmP0rdPfA
Good review. And what’s your experience with X5? I’d seems to be an accessible option to starting my tests but I wonder if it could have enough space for basic UAV equipment (APM 2.x; sensors, a compact camera -Canon Ixus or something like that) and, even more important, if it can maintain a stable flight with full payload. More over, wing wiglets of the X5 you show are quite different than X5 I can buy in Spain (http://www.tormodel.com/catalog/product_info.php?cPath=21_61&products_id=2217). Is yours a newer version?
Thanks in advance
Hi Eladio, we are experimenting with this X5: http://www.bevrc.com/x5-flying-wing_p255.html. It is a tight fit indeed with all those equipment. A possible solution is to get an odd shaped battery like this one: http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=11612
you are right. I have been reviewing the (very similar) gatewing x100 pictures and videos and it uses a battery like that. By the way, I will have a real gatewing in my hands this week (at spanish Esri Conference in Madrid where I have meet with the dealer) or, at least, watch it closely. Hope to take some ideas 😉
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Have you looked into using android phones? LapseIt can do time lapse photography like the Canon, or do video. It can also do gps tracking (with a sim card). I am playing with this idea, and it seems to be cheaper and lighter weight than the alternatives.
Hi Howard, yes we did experiment with ios and android phones for taking photos. But they are not necessarily cheaper than some of the lower end but perfectly capable compact cameras. Let us know if you figure some out! Thanks!
How do you power the RC receiver? Do you have a separate battery for it or did you hook it up to that big LiPo?
Hi sam, the receiver is powered by the UBEC/ESC which draws from the main lipo battery. We don’t use separate batteries.
i was bale to get 80 mins with Raptor 1600mm wingspan using 2×3200 mAh 3S batteries. programmed flying speed was 12m/s.
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In a conservation aera, often with a warm climate, i would strongly discourage the use of the acrylic cockpit for the Penguin, as everything inside would get terribly warm. In a cold area, then, this is maybe a good idea for the battery…
Thank you. Good point!
Very good point. The cockpit on the Penguin worked well in Greenland because it was cool there, but in future builds we put everything internal and stopped using the cockpit for weight reasons.
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Can you please tell me what is the top weight of the Maja that you tried?
Thanks in advance!
We have put about 500gr in it as payload (exl. batteries). We are not using the Maja anymore though.
Why aren’t you using the Maja any more?
We have moved on to systems like the X5 which are a bit smaller to carry around and more robust and also have a take off with a bungee cord.
Hi, can you send me the PID settings for FPV Raptor. My best regards.
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I am a high school teacher in the US. I have just started an introduction to UAV class that lasts one semester. I would like ideas on class projects that would provide practical applications for my students to work on. I envision the projects to be a capstone to the class and take place over the final 3 weeks in the spring when weather is more comfortable for flying. By then the kids will be accomplished RC model pilots as well.
Sounds great. Perhaps mapping would be a good start for projects?
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ywalkeris a popular airframe among the FPV community (First … bboards.wordpress.com
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