Hi all,I'm sat scratching my head trying to do something which is easy on APM...My PX4 is all set up and working...however, in seatbelt mode, the autopilot actuation is reversed for the elevator and…Continue
The latest update on my project for the chemical engineering nerds out there, how to get a polarisation curve from my fuel cell using a raspberryPi controller.
Why a fuel cell; if you haven't followed my other posts, they can provide cruise power for hours, greatly increasing the endurance of a RC plane or…Continue
Please see the video below for a description of my fuel cell controller (so far) for a remote controlled plane. A fuel cell provides much greater energy density than a battery, so for long endurance it is far superior (hours). Hopefully, with a bit of refinement I'll have the system flying in my SkyWalker X8 in the spring.
Feel free to comment, I look forward to sparking some interest!
A hydrogen fuel cell is a device that converts hydrogen gas & air into electricity and water. Although these devices are much lower power density than batteries, they can pump out that power for many hours, depending on the amount of fuel you are storing.
At Loughborough University UK, we are working on a fuel cell and LiPo…Continue
X8 has 80 sq. dm of wing area. Lets compare it to the popular Gatewing X100 which is 23 sq. dm. Gatewing is 4.4lbs so has a wing loading of 31.5 oz/sq. ft. Cruises around 75km/hr and reported stall speed of 45 km/hr.
Our X8 at 8.5lbs has a wing loading of 15.8 oz/sq. ft. At 9.9 lbs it would be 18.5 oz/sq. ft. In fact our X8 would need to weigh 16.8 lbs to have the same wing loading as the Gatewing.
I'd say that at 8.5lbs it flys great. Could easily handle a couple extra pounds as far as flight characteristics go. Would consider proper carbon fibre wing spars and maybe some fiberglass packing tape first.
I am also in need of peoples flight data; I need current, voltage and throttle for any flights you do, which I can include in my PhD research. Inbox me if you can help!Any advice, experience or ideas please let me know!
All suggestions for improvements welcome!
In order to take such a high weight I have beefed up the structure using fiberglass tape. I am also running a 4Ah 7s LiPo with 1800W motor (needs to be a high voltage for fuel cell integration). Currently I am running a smaller 12x7" prop which stalls if much above 50% throttle, stopping torque roll completely. I will up the prop as I increase the weight.
I have successfully moved from using XBee to connect our vehicles together and to the ground, and have replaced them with a WiFi network. It could be set up as an ad-hoc network, but for development I am using a standard home router to host a wireless-g network, which my laptop with mission planner connects to, as do our vehicles, at the full 54Mbps (less errors than 100Mbps). This is 100x faster than the XBee's, and in testing has proved to have a better range and signal quality. Below is an image showing the new setup, and how "plug-and-play" it is. I have no experience of networking but this was very easy to set up in 30mins.