Re: Van Vleet Cowling Mod in Q-Talk 119

Rene Robertson <q2robertson@...>

Hi Dave,
I believe Richard is onto something. I did away with my cowl flap and built an extactor type exit as can be seen in my article in issue 117. I didn't see any speed increase but did notice a substantial cylinder head temp drop. Cruise CHT is now 225 and sustained climb out never goes over 300.
If I was modifying my cowl over again I would incoporate Richards cowl bottom opening. I believe his numbers are correct.
If the heads run cooler great. If you get a performance increase to boot, even better.

----- Original Message ----
From: darichardson75 <darichardson75@...>
To: Q-LIST@...
Sent: Saturday, November 4, 2006 6:54:02 PM
Subject: [Q-LIST] Van Vleet Cowling Mod in Q-Talk 119

Hi Guys,

I'm curious about the modification Richard made to his Turbo Q2 and
just why he is seeing such an improvement. It looks simple enough to
do and with my Tri-Q2, opening up that area would make removing the
lower cowling much easier. I wouldn't mind getting rid of the cowl
flap either.

Is the idea sound enough to be worth hacking up my cowling?


Dave Richardson
Tri-Q2 825DR

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