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Old Jan 02, 2013, 04:08 AM
It's like an addiction!
Downwind3Zero's Avatar
NY, Rochester
Joined Oct 2003
1,502 Posts
Good one!
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Old Jan 02, 2013, 04:55 AM
Extreme CNC Alloy EDF
Extreme_RC's Avatar
Australia
Joined Mar 2006
11,497 Posts
You could also use L or T shaped alloy extrusion and silicon it to the sides of the fan, makes a nice isolated mount too, like I do on the alloy housings.
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Old Jan 02, 2013, 05:04 AM
Banzai Institute
buckaroo's Avatar
United States, NY, West Seneca
Joined Oct 2005
541 Posts
Interesting Mark, Just silicone is enough to hold the extrusion's to the housing? Even for the 127mm big boys? Does it help that much to dampen out vibrations?

Dean
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Old Jan 02, 2013, 05:08 AM
Extreme CNC Alloy EDF
Extreme_RC's Avatar
Australia
Joined Mar 2006
11,497 Posts
I use dow corning MIL3145, its about the highest grade I have found, huge shear strength and so far no returns or issues from the guys running the big fans. It certainly damps the fans better than a solid bonded bracket, but servo grommets are also great, you could use both
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Old Jan 02, 2013, 06:04 AM
EDF Jet Jam May 2014
Robert Belluomini's Avatar
United States, KY, Crestview Hills
Joined Dec 2000
6,431 Posts
Quote:
Originally Posted by pdawg View Post
Is there a U.S. distributor for this fan? I'd like to use it in my soon to be completed y/a A4

nice skyhawk i flew one of these years ago on a dynamax
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Old Jan 02, 2013, 06:34 AM
Banzai Institute
buckaroo's Avatar
United States, NY, West Seneca
Joined Oct 2005
541 Posts
Wow Bob you squeezed a Dynamax in there? Correct me if I am wrong as I still have this A4 fuse in glass hanging up in the rafters. Mine was originally one of Bob Violets first DF kits. It was designed around the "Scuzzi?" fan unit with a K&B 7.5 for power. I think Larry Wolf ended up with the rights to both and the fan than became the Turbax. As far as the airframe goes I have herd rumors that the Yellow version ended up being almost the exact same thing.
My buddy built and flew this plane way back when. It was very marginal with the setup but was never the less the FIRST successful ducted fan kit to hit the market. It used a cheater hole that was molded into the bottom of the wing. Later improvements included internal ducting and the elimination of the cheater hole but it still was marginal with the 7.5.
Seeing how much trouble my buddy was having with the kit I never built it. I did look at it a while ago and seen you could squeeze a Dynamax in there but boy was it tight. Bob did you use the cheater hole on yours? Cool stuff. Boy those were the days. What a leap from than till now.

Dean
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Old Jan 02, 2013, 07:41 AM
EDF Jet Jam May 2014
Robert Belluomini's Avatar
United States, KY, Crestview Hills
Joined Dec 2000
6,431 Posts
The yellow a4 used a dynamax dont recall it having a cheater hole.
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Old Jan 02, 2013, 01:32 PM
Current project: Electrolyte
pdawg's Avatar
United States, OH, Dayton
Joined Apr 2004
5,482 Posts
Thank you Robert!
Mine was also set up for a dynamax but with the current technologies a 90mm seems much more appropriate. Look at how much more space there will be with the 90mm.
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Old Jan 02, 2013, 01:41 PM
Registered User
Tempest's Avatar
Gaithersburg MD, United States
Joined Nov 2000
972 Posts
If you have any interest in removing the existing ducts, Tam makes a nice set of 90mm intake ducts for the Yellow A-4.

Paul
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Old Feb 05, 2013, 09:20 PM
Registered User
United States, FL, North Port
Joined Mar 2004
3,167 Posts
Anyone stateside have a pair of inlet rings for the jetfan 90's they be willing to part with? I have some on order that i can replace yours with when they arrive if you dont mind helping a guy out
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Old Feb 05, 2013, 09:36 PM
Registered User
Tempest's Avatar
Gaithersburg MD, United States
Joined Nov 2000
972 Posts
Thomas, my Jetfan 90's did not come with inlet rings. I do however, have more Midifan inlet rings, if those would help.

Let me know.

Paul
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Old Feb 05, 2013, 09:44 PM
Not Funny......
Mike Warren's Avatar
United States, CO, Redstone
Joined Dec 2010
894 Posts
Thomas,
My order of 90mm is delayed so I'm asking Rainer to ship out the inlet rings in a separate shipment ASAP. I hope I might get them in within the next week to 10 days?
-Mike
www.performance-edf.biz
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Old Feb 06, 2013, 06:22 AM
Registered User
United States, FL, North Port
Joined Mar 2004
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Paul,
Do those fit the jetfan shroud?


Mike,
That sounds great! It may be about 10 days before i have time to install everything into the horton anyways, so that may work out just right c
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Old Feb 06, 2013, 09:20 AM
EDF Jet Jam May 2014
Robert Belluomini's Avatar
United States, KY, Crestview Hills
Joined Dec 2000
6,431 Posts
Quote:
Originally Posted by Mike Warren View Post
Thomas,
My order of 90mm is delayed so I'm asking Rainer to ship out the inlet rings in a separate shipment ASAP. I hope I might get them in within the next week to 10 days?
-Mike
www.performance-edf.biz
Mike I would like one of the inlet rings please.
Thanks,
bob
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Old Feb 06, 2013, 05:19 PM
It's like an addiction!
Downwind3Zero's Avatar
NY, Rochester
Joined Oct 2003
1,502 Posts
Do you know what the holdup is Mike?
Chris
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