Shrediquette - the award-winning multirotors by William Thielicke

It has been a while since I posted something here. It is not because my project is dead, it is more because I spent my hobby time with flying and not with making new things. The derbe evo is almost perfect and I am very happy with it, so I don't see the need to design a new frame currently. But I am currently rewriting my flightcontroller code in order to achieve a faster control loop frequency. 1000 Hz should be possible on my 8bit ATXmega32A4. I will achieve this by using integers instead of floating point variables, and by removing every unnecessary line of code. But recently, I bought an Eachine QX90 (always wanted to adapt my own flight controller for a small brushed copter, but there was not enough time...). And it flies great. I however changed it a bit, here is my setup: QX90 original FC (stock firmware, see settings in the pictures below) Standard motors Gemfan 65mm propellers Custom frame (weight: 5.5g, see pictures below) Eachine TX01 cam with dipole antenn...

Hey, I decided to make the derbe evo v2 available on Shapeways.com. So I don't have to send the files manually by e-mail. You can download or order using this URL: https://www.shapeways.com/shops/shrediquette The fleet...

I've been flying the derbe evo for a while now, and it is very agile and fast. I had to reduce the PD parameters by 30%. This is due to the fact that the mass is closer to the centre of the copter, and that reduces the moment of inertia. I was flying a competition with the derbe evo already (Hannover Cebit FPV Cup, here's a video ). Unfortunately, the derbe evo crashed very hard during the qualifying (the gates were made out of massive steel, and the video reception was very poor). I think, I was frontally hitting a metal tube, and the 3D printed frame broke (two Cobra motors also have a bent shaft - I had to replace them as I do not manage to remove the shafts). I implemented some modifications in the new version. The camera angle (wide angle lens) is now 35° (instead of 25°) to allow for higher pitch props. The 3D printed frame is thicker. And the power conncetor is now integrated in the frame. Additionally, I added a small button for the TBS unify pro to change channels com...

The copter had its first flight yesterday. With the 5.5" Graupner Race-Props , the speed is absolutely amazing - I still need to learn how to control such a fast device properly. Here is a quick + dirty video: https://www.youtube.com/watch?v=V6I8i4Hk2J0   And Shrediquette is still open source of course, so here are the 3D files: william.thielicke.org/multirotors/derbe_evo_v97.zip The arms are from the Claerials HUMs quadrotor: http://claerials.com/shop/hums-ersatzarm/

The derbe evo is ready, I just need to find a suitable antenna...

Some images of the assembly process...: There is not much space inside the frame, but everything fits. The assembly also went quicker than I thought. I just need to replace all the motor shafts of the Graupner Ultra 2806 2300 kV motors (due to a hard crash), and then I am ready to go. The take-off weight is just 447 grams.

I think I now have all the parts that I need to start assembly. The frame weight is 77 grams (without electronics). Here is the latest teaser: https://youtu.be/no3FbcdH4LE