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Hi Tommy,
Did you make the cut-out in the lower edge of the fuselage for the flap as
per S-H instructions (shown as DE in your drawing)? If you did DE should
only be about 1.0"
Just for grins, any of you guys with high speed connections may get a kick
out of my 1st start video. (actually it was the second start, my first was
with no exhaust and using a jerry can for a gas tank back in January). It's
at http://eaa154.dhs.org/perry/engine/EngineStart.mpg
Perry Casson
----- Original Message -----
From: "Tommy James" <twjames@healed.org>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, August 08, 2003 7:17 PM
Subject: [FlyRotary] Cooing Questions
> Hi Guys,
> Attached is a line drawing of a side view cowling with an outlet duct in
the
> bottom. It is lettered counterclockwise from the lower left corner A
> through G.
> BC is a movable cowl flap, DE is the lower edge of the fuselage, and EF is
> the firewall.
> If we want to open the exit area, we can :
> 1. increase the angle downward on the flap, but this will increase drag.
2.
> move BC forward, keeping the angle the same, but increasing the distance
> from point C to point D.
>
> Glastar recommends a 20 degree, 5"x20" cowl flap with about a 3"X20"
> opening. Dis ain't enough...:-)
>
> What negative effects can be expected from plan #2? Will there be
> turbulence up into the firewall area? Will even more drag be induced?
>
> Any ideas appreciated, (well, almost any..)
> Tommy James<><
>
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