Last week I had the 1st, 2nd and last flight of my Electrajet EDF conversion.
I spent more than 2 months modifying the airframe, and I was more nervous than usual for the maiden flight. I hadn't yet added color & markings, and only have 1 pic of it.
The maiden flight went well, thanks for advice from Bob Andris and a perfect hand lauch by Ron Fikes.
I wanted to share this setup-- it's a good one for a faster-than-your-typical-parkflyer plane:
* minifan 480
* Mega 16/15/4 (fan, motor & leads= 5.5oz)
* TMM ComPro 18e ESC,
* Thunder Power 4s 1950 Lipo pack. (5.4oz)
(yes 14.8V. Fully charged 16.8V, which is max the ESC can handle w/ bec)
This combo gave 17.8oz static thrust at 13.4 Amps on the bench and flew this 23oz plane on 1/3 throttle. Motocalc predictions at static were pretty close, so I'm confident I could fly it for over 35 mins at half throttle or about 12-15 mins at high throttle.
Unfortunately, after the first flight I modified the ailerons mounting by packing tape only. On the second flight, the ailerons pulled away (100% slop) and it had a life-ending meeting with the dirt. Oh well, I still have my pride!
I also was told I should balance the fan rotor. At a couple throttle levels, there was a screetching sort of vibration sound.
For anyone else thinking of converting the Electrajet to EDF, I recommend to mount the fan forward of the fins, as low as possible and in a simple manner to reduce resonation/vibration.
I could post the pic here, as soon as I figure out how to do that