Mailing List flyrotary@lancaironline.net Message #6461
From: JJ JOHNSON <JJJOHNSON@ACCESSCOMM.CA>
Subject: Re: [FlyRotary] Re: installed engine widths
Date: Fri, 12 Mar 2004 13:37:04 -0600
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
Thanks Rusty, I'm currently in the design and figure stage so I just wanted a close number, I can always change it later but being as I don't have an engine here yet I didn't even have a base line to start from.
 
Thanks
Jarrett
----- Original Message -----
Sent: Wednesday, March 10, 2004 7:07 PM
Subject: [FlyRotary] Re: installed engine widths

I'm curious as to the installed width of the 13b or 20b's that some of you have on your birds. Assuming a turbo installation and a spintech exhaust down below and fuel injection. How narrow could a guy make his overall cowl width at the firewall?  What would be a 'safe' number?  This could/would mean a narrower engine mount because it would seem that, that might be the widest pnt on most mounts out there right now..  or an I way off in thinking that?

Curious..
Jarrett Johnson

This is tough to answer.  The RV-3 firewall is about 23" wide, and I needed the extra cowl cheek area to fit the turbo.  If extra height is available, the turbo can be put below the engine, and you could get rid of the Spin Tech.  If I had to make a guess (and this is only a guess), I'd say about 30 of width at the firewall (tapering toward the nose) would be the bare minimum to allow you to fit the turbo on the side of the engine with no bumps in the cowl.  Rest assured that every extra inch will be a great relief when it comes time to fit everything under the cowl.
 
Cheers,
Rusty (stuffing everything in an RV-3 cowl) 



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