Shrediquette - the award-winning multirotors by William Thielicke

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/

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

Here are some renderings of my latest frame concept. It has a very small frontal area and should reach high speeds. The diagonal motor distance is 210 mm and I will use 5.5 inch propellers ( Graupner Race-Prop or C-prop).