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Motor jet, afterburning EDF

Posted: Tue Jul 13, 2010 9:33 am
by Axel Borg
People have been asking for more information regarding an EDF afterburner shown on you tube, and I thought that it might be of interest for some members of this forum as well. The kit is out of stock, but the original building instruction that came with the kit is now available as a free download pdf. The building instruction is quite informative and reveals the key design features that make stable combustion possible in seemingly high speed air flow ducts. Check out the Free download section at:


Re: Motor jet, afterburning EDF

Posted: Tue Jul 13, 2010 2:05 pm
by Mike Everman
Heck yeah! Lots of good stuff there, and I think it's been talked about a dozen times here. So nice to see it all worked out!

Re: Motor jet, afterburning EDF

Posted: Wed Jul 14, 2010 2:40 am
by racketmotorman
Hi Axel

LOL.....very enjoyable :-))

We only need air speeds of <400 ft/sec at the afterburner inlet to have stable combustion , easily achieved ........................there would need to be careful consideration made as to the "best" EDF , preferably more of a "low speed" unit rather than something for a highspeed RC aircraft , so that the EDF produces more "pressure??" rather than highspeed air , any unit producing high speed air would need a modest diffuser before the A/B but that produces losses so not such a good way to go .

The unit in the vid appears to have "too much" nozzling , more losses from the surface friction .

An interesting experiment though, thanks for the Link :-))


Re: Motor jet, afterburning EDF

Posted: Thu Jul 15, 2010 9:07 pm
by Axel Borg
I just have to show you guys what I did yesterday, even though it is off topic:


Re: Motor jet, afterburning EDF

Posted: Sat Apr 09, 2011 3:55 pm
by hectmarr
The motorjet not very efficient, but could power a light aircraft perfectly.
This is my prototype, lightweight, reliable and cost little money. ... re=related