More FPV videos:
crash (very bad lunch ...) https://youtu.be/DYQUXU0mu_4
gliding (yes, it can glide !!!) https://youtu.be/4Bjhz2II-3U
low passes at full speed https://youtu.be/99NEkFP-Bvo
UPDATE 07-2017 : Succesfull flight in first person with googles !!! see videos here:
Hardware from banggood;
camera : https://www.banggood.com/Eachine-TX03-Super-Mini-025mW50mW200mW-Switchable-AIO-5_8G-72CH-VTX-600TVL-13-Cmos-FPV-Camera-p-1104884.html?rmmds=search
UPDATE 07-2017 : After several flights I have to say that I really like this plane !!! I finally removed the winglets and keep the balsa extension to the vertical stabilizer seen in the picture. It greatly improved lateral stability. Next step : FPV ....
UPDATE 05-2017: It flies !!!! A maiden flight of 10 minutes, with some stability problems but probably because of gusty wind. Landing was not peaceful (see picture), so some reprint will be needed....
It´s done !!! Waiting for the weekend for the maiden flight ....
I finally installed a Cobra 2208-26 1550 kV motor, to reuse a set of 2S 1100 mAh batteries and a 12A ESC I already have. Total weight is 460 g, and CG is about 32 mm.
This configuration will develop less power than the original one (Turning 2632 with 3S battery), but with a 9x6.5 propeller it should give me, theoretically, about 550 g of thrust (I have measured 11.5 A peak at full throttle).
According to Cobra specifications, with this propeller full throttle should not be used all the time to avoid overheating (Measured temperature was 48º after 5 minutes at 80% throttle, but rises up to 60º at 100%).
With a 8x4.5 propeller there is no temperature restriction, but theoretic thrust goes down to 430 g. I have one, but I prefer to use the 9x6.5 in the first flight, just in case I need a power boost ....
Just a few adds-on (see pictures):
- Two pieces of fine grade sandpaper to avoid lateral movement of the wing.
- A 2 mm carbon rod reinforcement inside the fuselage, behind the motor. Deformation of this zone when laterally pressing the fuselage generated a crack. With the reinforcement it is more rigid.
Thanks Wersy for sharing this beautiful design (and for the advice on choosing the motor) !!!
Wings printed at 0.18mm layer height, and fuselage at 0.27 mm.
Printer is a Legio, from Leon3D.