Harley Twin Cam 88ci Engine for Aircraft

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Harley Twin Cam 88ci Engine for Aircraft

Postby Sean_Caranna » Sat Aug 14, 2004 2:17 am

http://www.hog-air.com/index.htm is where I found out about this. Does anyone know more about it?
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Postby Johnny luvs Biplanes » Tue Aug 17, 2004 4:33 pm

This came up on another forum last year, it got poo poo'ed for bad drive design and suspect cooling issues. This was only peoples opinion though based on study of available info!
Go love a biplane today :)
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Postby Brett » Thu Aug 19, 2004 4:09 am

The only cooling issues we have had is getting it warm enough.
We have had no problem keeping them cool.
As for the drive the first one we did now has over 200 hours on it with no problems.
If your not going to try, then whats the point of talking about it?
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Postby Johnny luvs Biplanes » Sat Aug 21, 2004 7:08 pm

Brett
Are you the manafacturer of this set-up?
If so how about a detailed report on various forums?
John
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Postby Brett » Sun Aug 22, 2004 12:21 am

Yes that would be me. I could do that. What other forums did you have in mind?
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Postby Johnny luvs Biplanes » Sun Aug 22, 2004 7:14 pm

Hi Brett,
Here would be a start, also: http//www.homebuiltairplanes.com/forums/
http://www.pfa.org.uk/cgi-bin/ultimatebb.cgi
There are plenty of other places listed on the Homebuilt website.
How about EAA pages, lots of scope there.
I wish you the best of luck with the project.
Cheers,
John[/url]
Go love a biplane today :)
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Postby Brett » Mon Aug 23, 2004 12:59 am

Thanks I'll check them out.
If your not going to try, then whats the point of talking about it?
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Postby Sean_Caranna » Mon Aug 30, 2004 1:09 am

I was looking at the dyno charts on your web page. I'm sure these are crank HP/TQ numbers but they are impressive.

I was wondering what has been changed on the engine for aircraft use. Heads, Carb, Ignition, Cams, Aircleaner? I looks like a nice flat torque curve for a twincam. This can't be a "drag" type exhaust. Can it?
"I'll have what the gentleman on the floor is having."
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Postby Brett » Tue Aug 31, 2004 10:33 pm

Yes these are crank HP #'s.
We change them all except the heads. If we change the heads then we can get more out of it. But most people don't want to spend the extra money. On my plane I have a stright pipe " drag style" exhaust. We can get about 8 more hp. if we use a 2 into 1 exhaust. But I wanted the sound for fly overs and shows etc.

Brett
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Postby jd » Tue Sep 11, 2007 2:50 pm

sounds like somebody didnt design a good cooling duct for the heads.if ya use synthetic oil and a oil cooler ya get more performance and longevity on yer mill.check out clotz scooter oil.
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