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Jan 07, 2007, 03:11 PM
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Discussion

electric conversion of a ramtec fan


I have a Josh Harel A-10 that is designed for twin OS91vrdf's and Ramtec fans.
Does anyone know if there is a suitable brushless moter that would run these fans?.
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Jan 07, 2007, 03:18 PM
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Ed Waldrep's Avatar
Not that I've heard of yet but somebody's bound to try it. I've seen that big A-10 fly at the QSAA Giant scale rally back in the 90s and lets just say there wasn't a lot of excess power there, it was a huge airplane to push around on those fans. The nacelles are huge, you could go with a larger fan if there was one. Well there is, the Byron Byrojet, some guys in Arizona are converting them with some Hacker outrunners. Don't recall the wattage their getting but probably more static thrust than a ramtec would do since it's a larger fan. I don't know if you have molded nacelles or you're doing an all balsa project but if balsa then you could change the design to suit the byron.

I believe Josh Harel's original design used his 3 bladed cut down master airscrew and custom designed 8" housing for power. If you ran that on maybe some outrunners that might be even better but I don't know what the flight speed would be. I heard the glow motors were throwing prop blades so that's why the guys in Denver who built the ones I saw went with the glow fans.

good luck
Jan 07, 2007, 06:37 PM
smug in granny panties
monkamarm2000's Avatar
yeah its a tall order right now for ramtec and dynamax stuff in regards to motor and ESC's . Bruff is messing with Byro stuff right now with some good result's, and parts for conversion are supposed to be available soon from EJF.com.
Jan 07, 2007, 06:40 PM
Suspended Account

Big fans


Winmodels made the wm2000 fan 125 mm for ivan goodchilds big a10, not cheap and you might wait for ever for delivery, but these would be the ultimare.

Otherwise the e-turbax might be a fair coice.

Steve
Jan 07, 2007, 06:40 PM
2018 EDF Jet Jam June 14-17
Robert Belluomini's Avatar
yes it is a new model called a turbine!


Quote:
Originally Posted by FatBill
I have a Josh Harel A-10 that is designed for twin OS91vrdf's and Ramtec fans.
Does anyone know if there is a suitable brushless moter that would run these fans?.
Jan 08, 2007, 09:01 AM
Suspended Account
Quote:
Originally Posted by Robert Belluomini
yes it is a new model called a turbine!
Take this man out and give him a cigerette and a blindfold Get out of this thread!
Jan 08, 2007, 11:27 AM
Registered User
gbruce's Avatar
LOL good one whistling...

I have the Giant Jets F-16A semi kit from Josh Harel and I think a twin Byron conversion of his A-10 would be Perfect,and relatively inexpensive.

The Dynamax and Ramtec are a little on the small side for this one IMHO

From the looks of the plans that I have you could EASILY loose a few pounds just by substituting foam or hard balsa in alot of non structural areas....it calls for plywood EVERYwhere

I am working towards this build by getting the EDF setup and finding out it's capabilities on a sport jet before Diving into a huge build like the F-16 or in your case the very cool ,but very large A-10.

Bruce
Jan 08, 2007, 12:23 PM
Suspended Account

new big fans


There is something going on in Germany on big edf and new fans at the moment. If I told you I would have to kill you


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