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Does the cowl align to fuse or does it align with engine

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rvickski(at)yahoo.com
Guest

Posted: Sun Jan 25, 2009 5:18 am Post subject: Does the cowl align to fuse or does it align with engine

All I can say is how I did it. 

The crankshaft/prop hub center line is 3 degrees from perpendicular to the fire wall but the center of the hub is on the center line of the firewall if I project the line rearward. Consequently the rear of the engine looks off center when viewed from the top. I built the nose bowl with 3 degrees out of plane to the firewall to keep an even gap at the spinner.



I think I would worry more about cowling symmetry to the fuse than centering the hub on the nose bowl if it is pretty close. If you have no close fitting spinner then there is a fair amount of latitude.



A round plywood disc bolted to the hub and clecoed to the nose bowl is how I located the nose bowl.   



Roy

--- On Sat, 1/24/09, Geoff Heap <stol10(at)comcast.net> wrote:



 	  Quote: 	
		   From: Geoff Heap <stol10(at)comcast.net>

 Subject: Does the cowl align to fuse or does it align with engine

 To: zenith701801-list(at)matronics.com

 Date: Saturday, January 24, 2009, 5:08 PM

 

 Heap" <stol10(at)comcast.net>

 

 The engine is 3 deg off A/C center line. Does the cowl

 follow the engine CL to centralize the prop hub within the

 cowl opening? I imagine it is but I've never thought

 about it before and I don't recall the subject ever

 being mentioned anywhere.

 ......Geoff....Frigid in New Jersey

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p 26583#226583

 

 

 

 

 

 

 

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Geoff Heap

Joined: 12 Jan 2006
Posts: 266
Location: Lindenwold, New Jersey

Posted: Mon Jan 26, 2009 2:22 pm Post subject: Re: Does the cowl align to fuse or does it align with engine

Thanks to Larry and Roy

You’ve jogged my memory on that. I believe the Eng mount from Zenith does locate the engine mount so that the rear of the engine is offset to starboard a little. Then the 3° offset takes care of putting the prop hub back on center. It's so many years back I'd forgotten about it……..Geoff

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