efflux RC/Air Sally....F-20, 70mm ALL COMPOSITE w/custom ducts - Page 5 - RC Groups
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Apr 30, 2010, 08:02 PM
deltas are cool
AIR SALLY's Avatar
taking it off really wont help any way ,it's the lip that i had turned down so it would fit with my T-45 ducting ...i was trying to put the sky world fan in my T-45.i think that was like almost a year ago and i still dont have it in there
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Apr 30, 2010, 08:03 PM
Soggy Scotland
pilotrcuk's Avatar
Uhoh, er, it wasn't me... Well I tried more than a few times to pull the front part off as per how the back piece off - tool!! Sorry you have some war wounds...

It should definitely unscrew!!
Apr 30, 2010, 09:49 PM
efflux RC's Avatar
Sorry to hear about your sliced hand J.
....................

Rodger,
I haven't been successful at unscrewing the 70mm EDFs. The bigger ones are no prob. Guess I'm just weak. Be sure grab it with gloves on. The Kind with the rubber dots on the palm/finger area would be perfect. (garden gloves)
Be careful using tools, not to damage it.
Latest blog entry: Updated blog - Oct 2017
Apr 30, 2010, 11:53 PM
deltas are cool
AIR SALLY's Avatar
well tajking it off wont help for what is needed .
May 01, 2010, 10:52 AM
Big gov never Works
St. Martin's Avatar
Nice work, Roger!

BTW, the KY ducting is on the way, priority.

Fuzz
May 01, 2010, 11:22 AM
deltas are cool
AIR SALLY's Avatar
Thanks Fuzz
May 01, 2010, 12:00 PM
Registered User
Ed Waldrep's Avatar
What if you were to heat up the rear piece and dip the front inlet lip piece in icewater?
May 01, 2010, 12:32 PM
efflux RC's Avatar
Quote:
Originally Posted by Ed Waldrep
What if you were to heat up the rear piece and dip the front inlet lip piece in icewater?
I tried putting the whole thing in the freezer, then dipping the back end in boiled water last night. No go.
It might work doing it as you said because the front piece has much less mass.
Last edited by efflux RC; May 01, 2010 at 12:38 PM.
May 01, 2010, 12:40 PM
Registered User
Ed Waldrep's Avatar
Well if I were installing that fan in the airplane I'd have the end of the ducting supported by a bulkhead and have a bit of the ducting sticking out past that bulkhead, say 1/8" or probably less, then just mount the fan up against the bulkhead flush, and the slight amount of extra ducting past the bulkhead would slid up into the bellmouth. I like to mount all my fans this way, up against a bulkhead, with that bulkhead holding the rear of the ducting, and mounting the fan on rails, secured with screws. It takes care of the bellmouth problem. If the fan needs to be moved back, short adapters could be made.
May 01, 2010, 01:14 PM
Soggy Scotland
pilotrcuk's Avatar
I just tried to unscrew the 2nd SW housing I have - no problemo!! Maybe it's to do with the balmy 8 Celsius we're enjoying here today
May 01, 2010, 01:49 PM
deltas are cool
AIR SALLY's Avatar
or thread locker on some and not on others
May 01, 2010, 04:52 PM
efflux RC's Avatar
Just for ideas Rodger.....here's what I did with the Viper.
It still needs a bit of duct tape to seal the joint.
I left the inlet radius on the fan. but it could be cut off. I could make a fixture to do it here. There is the consideration that the Fan housing O.D. is smaller than the plastic housings. (The wall thickness is less than the plastic bodied ones.)
Last edited by efflux RC; May 01, 2010 at 05:07 PM.
May 01, 2010, 07:51 PM
deltas are cool
AIR SALLY's Avatar
with the full lip im worried that when you have a 70mm tube (center duct) then have to cone out to the lip that slow the velocity down . i have a step in one end of the center duct that the cut down SW fan fits very nice into ,and the sapac fan fit too ,Wm400 ,Het ,wemo all will fit in the other end , so you can reverse it to fit what ever fan you have .
May 02, 2010, 09:14 PM
Never fly an A model anything!
jayb1rdz's Avatar
Hey Gary, how many of the F-20 kits do you have there now ?? Can I reserve one from you as I plan to see if I can turn the one I have into a 90mm project ?? J
May 02, 2010, 10:19 PM
efflux RC's Avatar
Quote:
Originally Posted by AIR SALLY
with the full lip im worried that when you have a 70mm tube (center duct) then have to cone out to the lip that slow the velocity down . i have a step in one end of the center duct that the cut down SW fan fits very nice into ,and the sapac fan fit too ,Wm400 ,Het ,wemo all will fit in the other end , so you can reverse it to fit what ever fan you have .
That sounds good Rodger. Can you post a Pic?
...................

Jay,
There were only 2 available to us at the time. Rodger has one, I have the other.
I haven't done anything with ours yet. I may just add retracts and build it as is otherwise. The next order was to be for 5-10 kits. But that's dependent on our demand for the jet. I suppose we're waiting to see the results of Rodger's efforts.
Would you like me to see if I can get you a fresh one for your project?
A 90mm version would be awsome.
Latest blog entry: Updated blog - Oct 2017


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