>> You will have noted how the
large-diameter pipes coming out of a PT 6 turboprop, for example, seem to
stick out into the slipstream in a far from streamlined manner.<<
I think that has more to do with provision of predictable and consistent
backpressures and the critical affect of these on EGTs.
Duncan McF.
----- Original Message -----
From: "M.J. Gregory" <m.j.gregory@talk21.com>
Subject: RE: Europa-List: FW: New 914 Exhuast muffler and tailpipe
>
> Kevin,
>
> There have been instances of the Europa fuselage skin wrinkling in the
area
> of the port wing leading-edge following either the loss of the exhaust
> outlet pipe or the pipe being angled back too far to the rear. Apparently
> this damage occurs during a single flight. A few months ago, Andy Draper
> was looking into the problem. Although I believe these instances occurred
> with 912 engines, the precise cause is not clear and it would seem wise to
> keep to the standard geometry for the 914 also.
>
> The aerodynamics around the cowl and the exhaust gas flow in the prop wash
> are complex and not to be guessed at. You will have noted how the
> large-diameter pipes coming out of a PT 6 turboprop, for example, seem to
> stick out into the slipstream in a far from streamlined manner.
>
> Fly safely
>
> Mike Gregory
> Europa Club Safety Officer
>
> -----Original Message-----
> Kevin Klinefelter Sent: 09 August 2004 18:24
> ...A less draggy look would be aimed back with the flow more. Is there any
> reason for not aiming the pipe a lot more aft?
>
>
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