Our H1 drone was finally ready to be tested with new detachable landing gear, 3-axis gimbal and the Gopro camera (powered by an extra 3S-lipo battery). The objective of the test was to test the flight modes (mainly altitude control and position control) via 3DR telemetry connection to an Android phone and the Tower app. It was quite noticeable that the quad needs alot more power to overcome in-ground effects at take-off. This is mainly due to the mass balance with the camera at the nose of the airframe. The altitude control mode worked quite well even at low elevation of 3-4 metres. Unfortunately, at low-battery voltage an automated landing doesn't occur and this resulted in hard-landing (more like a hard crash!). This piece of software will have to be investigated. The manual operation of the Gopro is a bit cumbersome. The alternative of using the WIFI link to operate the camera was investigated but was not deemed a good idea given the potential inteference...

So the notion of upgrading my already awesome (if I can say so myself) looking drone to aerial videography using a 3-axis gimbal has been bugging me for a while now. I mean, why not? At least that will get me to fly the drone alot more and use it for other purposes. The fact that I only need a gimbal and a landing gear (given that I already have the awesome Gopro hero 4 silver), should be providential enough to just spend the dollars required to make this happen. But then one get's to think, why I am doing it for? I mean does my research of intelligent flight control ACTUALLY need aerial capability? One could argue that testing your software with a drone representative of an actual commercial drone could only enhance the validation/justification of the research.  But the ultimate question is, how MUCH distraction will this capability introduce to the essence of what the doctoral research is trying to achieve? Will I gain more information given that I've got now no...

So the notion that in order for me to proceed scientifically (and practically) towards the design of rotor dynamics identification algorithms that will run in real-time, I first need to model the effects of the rotor failure through experimentation. The two best ways of the doing this are (1) Buy a +R2k Tachometer and record (probably by  recording the display) the speed of the propeller with a pre-determined PWM value. (2) Use the high speed capability of an action cam (such as GoPro) and some clever algorithms to compute the propeller RPM. The latter is the cheaper (and the geekier) option of the two. The setup was such that contrast was created through the use of a black mat cloth on the setup table and painting the opposing blade of the propeller black and white (see below). A RGB (red-green-blue) adaptive algorithm was developed which would mitigate the occurrence of glares on the blade which would in turn give a false reading with the algorithm. Each frame was analyze...

So the time had come for me to test the gopro on the Heli and answer a couple of questions. One that was answered quite quickly was how stable was the configuration. It turned out to be quite stable after all. Although attaching the camera at the nose of airframe makes contro in windy weather quite intricate. I had a couple of close shaves. The eventual footage didn't produce much desired results although that was expected as not much thinking what into the vibration isolation of the video camera. The maiden flight was to see if everything will work as expected. One could potential use a vibration removal video editor although that it last resort. Accumulated flight time: 94min

So I've decidex to try out something I've been meaning to try out for a while now. Which is to setup my Gopro camera for some aerial photography. Eventhough I've been looking at getting a more polished system like a Dji Phantom drone, I thought there's a lot of mileage I can get just using what I already have. So having studied the best layout for the camera and battery, once the weather clears out, I'll be trying out this system. I'll need to get a Fatshark system to get into proper FPV flying although the aim is not for that at all.  The mass of the Gopro with casing is about 140g with means the all up weight has increased by 26% which means less battery life although one would not need 4min of video anyway. 

It was another windy day of flying. That's when you appreciate flying the heli calmer weather. Managed to clock in 8 minutes of flight doing various maneuvers. included side hover. I decided to put my Gopro Hero4 silver to good use by capturing some videos from the ground. It was not the perfect angle although the dynamics of my flying in windy weather was obvious. I was very choppy on the sticks (due to wind mainly) which made me question how the challenge that's awaiting me when I turn this heli into autonomous machine. Had a bit of hard landing which bent/broke the landing gear. But the heli does not know any difference. Accumulated time: 52 min