Message-ID: <007001c3bd1d$9e162ae0$0202a8c0@eric>
From: "Eric Ruttan" <ericruttan@chartermi.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-2871019@logan.com>
Subject: Re: [FlyRotary] Re: K&M and Thick Radiators
Date: Sun, 7 Dec 2003 18:55:39 -0500

From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, December 07, 2003 8:36 AM
Subject: [FlyRotary] Re: K&M and Thick Radiators

> Ok, Paul.  Based on my back of the envelope calculations at a fuel burn of
> 8.5 gph with that size radiator, you would need an airspeed of around 142
> mph to provide adequate air mass flow.  So it should have no problem
cooling
> you at your typical cruise airspeed provided your ducting brings in the
air
> stream adequately.  So, I would think you need to concentrate on how you
> would handle the heat rejection defficit between take off and 142 mph.  I
> have no idea how long it takes your type aircraft to go from application
of
> take off power to 142 mph.  That could make a big difference in how much
of
> a challenge your high power/low airspeed regime is. Cowl flaps? Spray
bars?
>
> Good luck.
>
> Ed Anderson

Ed
How do the Mass Air requirments change with altitude.  For example, if the
fuel burn was 8.5gph and altitude was 25K would the mass air requirements
change do to thiner air?  Would the lower temp make a difference?

Thanks for your help.