42% 122" Extra 260 conversion

[Joacim]

Latest project will be to electric convert a 42% scale Extra 260 with same goal as the Katana conversion, thanks for the sucsess and great result with the Katana and its powersystem i was asked to do the same, but now with a larger airframe and new 2,4Ghz radio. I will also continue to test and evaluate the Mejzlik electric props and spinners, also test a new Jeti SPIN300 controllers togheter with Flightpower Lipo and Plettenberg motor.

The model is light build, fuse on pic is only 2,5kg. Batterys will be 14s configuration, i will go down from 15s that i used in the Katana to 14s becas of EU rule/ recomendation. Radio is a new Futaba 12FG 2,4Ghz FASST with the R6014FS 12chanel reciver, i will start test the 2,4Ghz FASST system in smaler setups first and finaly fly it in this plane with HV/ power setup. Total of 12 Futaba 9156 servos will be used togheter with the Duralite SC-12 Powerbox and Flightpower reciver packs.

[Neil4]

sounds cool but I can't imagine how much it would cost to convert a 42% Airplane to electric. I can't afford the conventional gas set-up for a 42% plane let alone an electric set-up.

How many batteries are you going to have....10? and how much are batteries a piece? $500?

[RMaia]

That sounds awesome!!!

Big electrics are cool!

[Joacim]

The battery will be in 14s Lipo serie 2p so total of 28 cells.

[lazyboyflyer]

Why so many servos? You only need 9 servos.

[Joacim]

Im going by recomendation, i have 12 but think i need 10, it also depends on who you ask, the answer is never the same when it comes to servos

[bodywerks]

If you use 9156's or 8711's, then 2 per aileron, one per each elevator half, and 2-3 on the rudder would be more than enough. I am sure you are aware, but an electric aircraft doesn't work servos nearly as hard as a gas-powered aircraft.

[Joacim]

Thinking of using total 4 servos for wing, 4 stab, 2 rudder.

Motor arrived today, so i think the motor will be installed by the end of this week.

[krayzc]

kewl

[JagerBomb]

	Quote: Originally Posted by Joacim
	Thinking of using total 4 servos for wing, 4 stab, 2 rudder. Motor arrived today, so i think the motor will be installed by the end of this week.

Looks awesome, any idea when it will be completed? I'm anxiously waiting for video.

Mark Trent

[Joacim]

This bird will be completed ASAP! but ofcorse there could be some problem at the beginning, but if everything goes ok it should be maiden by spring.

[Joacim]

Motormount- done
Place for ESC- done
CG sheck- done
Stab, servos- done
Messurments- done

[thewrap]

Wow that's a big motor. I don't even want to know what batteries are gonna cost you. But nice build.

[Joacim]

New homepage where you can read about this and other projets, large scale electric.

http://www.wattsup.se/

[Joacim]

A few more things have been done with the Extra 260, both ESC and motor have now found there final places and the rudder hinges have been glued. The rudder is removeble making it much more easy for transportation saving 35cm of lenght. Wiring have been started in the fuse, total of 4x 1600mm wires goes back to the stabilizer and there servos from the Powerbox up front in the fuse, these heavy duty wires have been custom made by Tommy / 3F Hobbyservice, for other servo wiring we have used Futaba 1m and 30cm wires. Cooling inlet holes have been cut in the motorbox sides.

I have now used the T12FG 2,4Ghz in smaler planes up to 2kw with currents up to 135Amp, reciver close to the main battery and ESC, it have worked perfect so far, i have also been using the 6channel reciver and it has also worked very well, the 12FG is a perfect uppgrade from my 9c, also i notice faster and higher servo respons with the FASST.