Sender: "Marvin Kaye" <marv@lancaironline.net>
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Date: Wed, 22 Dec 2004 12:31:55 -0500
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From: "Lorn H. Olsen" <lorn@dynacomm.ws>
Subject: Re: Remove lower cowl for prop balancing?

Bob,

I have had my prop balanced several times and can't remember removing=20
the lower cowl at any time in the balancing process.

Make sure that you go past the RPM that you want to balance at and then=20=

bring the engine back down with the propeller setting.

2,450 RPM is the best specific fuel consumption per horsepower for my=20
O-320-D1F engine. 2,450 RPM is what I balance at. Therefore, at the=20
2,700 RPM prop setting, I run the engine up to 2,500 RPM with the=20
throttle and then bring it back down to 2,450 RPM with the prop.=20
Balancing takes place at this point.

Lorn

> I'm planning to have my prop dynamically balanced next month.=A0
> =A0
> I'm worrying about whether to remove the lower cowl also, considering=20=

> that the prop blast might do it damage without the support of the=20
> upper cowl.
> =A0
> Maybe I worry too much,=A0 what have others done?
> =A0
> Bob Belshe
> L235/320
--
Lorn H. 'Feathers' Olsen, MAA, DynaComm, Corp.
248-345-0500, mailto:lorn@dynacomm.ws
LNC2, O-320-D1F, 1,000 hrs, N31161, Y47, SE Michigan