800 Xxtreme with belt-drive

[TeroS]

I'm in the process of making my 800 XXtreme to belt-drive (full story when it's done) and got all the parts except for right belts yesterday.

So I made a proof-of-concept with the original main-pulley belt, of course the tail-tube became very short

After that I just had to install it and see how it looked. It is funny....

After that I just had to try it....



Pics of components HERE and HERE.

[Raptorapture]

Really cool. Now how about some piro flips? Just kidding

[rogber]

The coolest 800 ever!

[Corvette & Copter Guy]

I this might be the only heli ever to be boom strike proof

[Raptorapture]

What about blade strikes?

This setup seems to be vulnerable to vertical interaction between tail and mains as opposed to horizontal interaction which sometimes limits the size of one or the other at extreme lengths.

[TeroS]

Progress report:

Works! And it works really well! I have about 15 test-flights now with the 800 Belt-Xxtreme and I have found the joy of this hobby again

My monster-motor has always had enormous torque, but Kontronik have done some great job on Kosmik 200 4.6 update, the amount of torque available now is ridiculous. I had to raise my precomp in vbar from 25 to 59. The machine is now a power-moster without comparison. (Anyone have Velos I could try? )

Construction is the same as in pictures above with added tension-supports both front and back made with 3x8x4 bearings supporting the belt. I'll most likely do a write-up to my blog about this someday after next two weekends helimeetings.

Belt used is 2004-3M-09, this is the most suitable available. The rear tube had to be shortened about 2.5 mm but that is no issue at all. Also no bigger modifications needs to be done, a part from pulleys and 3x8x4 bearings everything is Mikado parts.

[Raptorapture]

Congrats!

Happy to hear you've succeeded in this endeavour. Look forward to more pics or video