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Date: Tue, 12 Apr 2005 13:47:35 -0500
Subject: Re: [FlyRotary] Re: Air Cleaners-Screens (was Re: Latest on the Motor Trouble
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From: Jerry Hey <jerryhey@earthlink.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
In-Reply-To: <list-866318@logan.com>
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Rusty,  forget grass and dirt strips. Next time  you go to the airport=20=

you can set a good example by sweeping a portion of the runway. =20
Anything you can sweep up could also end up in your engine if you don't=20=

have a filter.   If you are third or fourth to take off, imagine the=20
crap still in the air when its your turn.   This is kind of a weird=20
topic to me as I can't think of any reason to not protect the engine=20
with a filter.  I would like to see a photo of you sweeping the runway=20=

:)   Jerry
On Tuesday, April 12, 2005, at 12:48 PM, Russell Duffy wrote:

> "Conventional wisdom" is - every engine should have a filter to keep=20=

> sand (and other hard parts) out of engine.
>
> =A0
> I think the key phrase is conventional wisdom.=A0 There's no doubt =
that=20
> dirt and such will eventually wear out an engine, all evidence=20
> suggests that it's going to take a long time to do that on a rotary in=20=

> our application.=A0 As you likely know, Tracy has never had a filter,=20=

> and flies off a grass strip.=A0=A0 I can't think of anyone =
who's=A0verified=20
> damage from=A0anything that came from outside the engine, though it =
can=20
> certainly happen.=A0 =A0
> =A0
> On the other hand, there have been plenty of engines damaged by items=20=

> that came from somewhere within the engine itself (intake, TB, etc).=A0=20=

> If anything, I think I'd like to have a screen between the intake and=20=

> side housings, except that I'd be worried about the screen itself=20
> eventually breaking and getting ingested.=A0=A0
> =A0
> I do agree that=A0the best plan (space permitting) would be to have =
two=20
> air sources, filtered, and unfiltered.=A0=A0
> =A0
> Rusty (unfiltered, unshaven, unwashed... )=A0
> =A0
> =A0
>
> =A0=A0
>

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Rusty,  forget grass and dirt strips. Next time  you go to the airport
you can set a good example by sweeping a portion of the runway.=20
Anything you can sweep up could also end up in your engine if you
don't have a filter.   If you are third or fourth to take off, imagine
the crap still in the air when its your turn.   This is kind of a
weird topic to me as I can't think of any reason to not protect the
engine with a filter.  I would like to see a photo of you sweeping the
runway :)   Jerry

On Tuesday, April 12, 2005, at 12:48 PM, Russell Duffy wrote:


<excerpt><smaller>"Conventional wisdom" is - every engine should have
a filter to keep sand (and other hard parts) out of engine.</smaller>


=A0

<fontfamily><param>Arial</param><color><param>FFFF,0000,0000</param>I
think the key phrase is conventional wisdom.=A0 There's no doubt that
dirt and such will eventually wear out an engine, all evidence
suggests that it's going to take a long time to do that on a rotary in
our application.=A0 As you likely know, Tracy has never had a filter,
and flies off a grass strip.=A0=A0 I can't think of anyone =
who's=A0verified
damage from=A0anything that came from outside the engine, though it can
certainly happen.=A0 =A0</color></fontfamily>

=A0

<fontfamily><param>Arial</param><color><param>FFFF,0000,0000</param>On
the other hand, there have been plenty of engines damaged by items
that came from somewhere within the engine itself (intake, TB, etc).=A0
If anything, I think I'd like to have a screen between the intake and
side housings, except that I'd be worried about the screen itself
eventually breaking and getting ingested.=A0=A0</color></fontfamily>

=A0

<fontfamily><param>Arial</param><color><param>FFFF,0000,0000</param>I
do agree that=A0the best plan (space permitting) would be to have two
air sources, filtered, and unfiltered.=A0=A0</color></fontfamily>

=A0

=
<fontfamily><param>Arial</param><color><param>FFFF,0000,0000</param>Rusty
(unfiltered, unshaven, unwashed... )=A0</color></fontfamily>

=A0

<smaller>=A0</smaller>


=A0=A0


</excerpt>=

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