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  #1  
Old 01-25-2018, 12:44 PM
dlomheim dlomheim is offline
 
Join Date: Sep 2006
Location: (2OK2) OK City, OK
Posts: 358
Default Radial Conversions RV-3?

Question...are any of you all who are now building, considering a ROTEC radial engine installation by chance? It seems that that 150 hp engine would be a neat installation in a "3"; and works okay in an "8" but (IMO) could use a bit more power (turbo-normalize, etc.). The Radial Conversions RV-8R builder / owner (search on facebook) is now starting to develop "firewall forward" installation packages for RV's, so check it out if you're interested in a cool sounding a/c.

Doug Lomheim
RV-3A sold
RV-9A Mazda 13B, FWF
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  #2  
Old 01-25-2018, 12:57 PM
Ironflight's Avatar
Ironflight Ironflight is offline
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Join Date: Jan 2005
Location: Dayton, NV
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Default

I think the Radial -8 is pretty neat - I got to see it long before it flew, and then several times after - butthe firwwall on an -8 is much bigger than on a -3, and even at that, he had to make the firewall bigger. I think such an installation would be a wee bit of a monstrosity Doug - and have less horsepower than the IO-320 we’re flying.....
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  #3  
Old 01-25-2018, 01:05 PM
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pazmanyflyer pazmanyflyer is offline
 
Join Date: Jul 2007
Location: Litchfield Park, AZ
Posts: 814
Default Radial -6

There's this guy too!

http://www.vansairforce.com/communit...&postcount=162


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  #4  
Old 01-25-2018, 03:22 PM
SHIPCHIEF SHIPCHIEF is offline
 
Join Date: Mar 2008
Location: Seattle
Posts: 1,366
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I have a Yak-55. I fly it for the AWESOME aerobatics. It has a radial engine, part of the reason it flies so well.
I have an RV-8 that I built. I would never want it with a radial engine. The airframe was designed for a Lycoming, and silly me...I installed a Mazda Turbo Rotary engine. It added about 5 YEARS to the build time, and about 70 pounds to the plane. The extra 30 horsepower was nice, but 16 flight hours later I realized that 'engine development' is a full time operation. The engine cowl must be removed on almost every flight to inspect EVERYTHING.
I expect a ROTEC or VERNER radial might not require as much inspection, but the airframe mods will take away much of the 'good' of an RV:
-Good visibility over the nose.
-Good speed ratio, low stall speed/high top speed.
-Good proportion - The light weight radial will be mounted too far forward on a long mount.
-Good progress during building - adding YEARS to a build is a big drag, I know.
One RV-3 has an Walter LOM inline 4.
http://www.vansairforce.com/communit...ead.php?t=8449
Which looks good. I appreciate different engine configurations, but they should match the airframe. Look at the Boeing P-26 and Grumman Wildcat; great looking radial engine single seaters have round fuselages.
Still, I wouldn't want to discourage a creative builder. Perhaps it would be a winner!
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  #5  
Old 01-28-2018, 11:05 AM
dlomheim dlomheim is offline
 
Join Date: Sep 2006
Location: (2OK2) OK City, OK
Posts: 358
Default Radial + RV-3

Quote:
Originally Posted by Ironflight View Post
...I think such an installation would be a wee bit of a monstrosity Doug.....
You're probably right Paul...but that radial sound is pretty cool!
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  #6  
Old 01-28-2018, 12:42 PM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 3,486
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For a while I had an Anzani radial and the thought did cross my mind.

It might not look too bad.... but the reliability would have been dreadful. Well, the performance, too....

Dave
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  #7  
Old 01-28-2018, 02:22 PM
TS Flightlines TS Flightlines is offline
 
Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,063
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We've been helping Brian at Radial Conversions on some FWF stuff. Quite a few things in development.

Scott in Maui----gotta love it!!!

Tom
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  #8  
Old 02-15-2018, 11:13 PM
CAVU Mark CAVU Mark is offline
 
Join Date: Dec 2014
Location: San Diego, CA
Posts: 77
Default Make mine a Zero

I Vans made a Zero I would put the Rotec in it and a the ZERO grin, no question. Love the sound of a radial.
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  #9  
Old 02-16-2018, 05:33 AM
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DanH DanH is offline
 
Join Date: Oct 2005
Location: 08A
Posts: 7,728
Default

If you really want a radial -3, you might look at 7 or 9 cylinder Verner.

http://www.vernermotor.com
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