Today's Message Index:
----------------------
1. 07:55 AM - Re: Aluminum tape (Gene Smith)
2. 01:42 PM - Just A Few More Days Left; Lagging Behind Last Year... (Matt Dralle)
Message 1
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| Subject: | Re: Aluminum tape |
--> Engines-List message posted by: "Gene Smith" <esmith6@satx.rr.com>
Hans.............Apparently you are very knowledgeable about these exhaust
systems, and obviously other aspects of complicated engineering
subjects...(I read everything on your "home" page, and the links, and
noticed you supplied a lot of the formulas for the exhaust problems)...What
is your opinion/experience/knowledge of "straight pipes," especially on a
air-cooled engine like the Lycoming 0320?..(a separate pipe for each
cylinder)...I know they present a little more noise, but here in Texas, it
isn't much of a problem yet...I also know Europe is strangled by those
stringent regulations..................Thanks for your inputs to this
list...................CHEERS!!!!
----- Original Message -----
From: "Hans Teijgeler" <hans@jodel.com>
Subject: RE: Engines-List: Aluminum tape
> --> Engines-List message posted by: "Hans Teijgeler" <hans@jodel.com>
>
> A Jodel DR1050 (see www.jodel.com - it's the aircraft on the home page),
> with a Subaru engine.
>
> The principles are the same though.
>
> There are three forms of heat transfer:
>
> * By contact
> * By conduction
> * By radiation
>
> If you make sure the exhaust does not touch the part that you are trying
to
> protect, then this form of heat transfer does not occur
>
> There is so much air circulating through the cowling that during flight
heat
> transfer through conduction is not really an issue. It is just on the
ground
> that this mechanism starts to work (the infamous "heat soaking" effect).
> Just make sure that your hot air can leave the cowling when not in flight.
>
> Which leaves radiation. The best you can do is provide a mirror-like
> surface, as heat waves will bounce off it just as well as light does
(after
> all, it is the same mechanism, just infrared light).
>
> In short: anything shiny will work.
>
> Hans
>
> P.S. To put point #2 into perspective, I have measured the temps inside my
> cowling, at the top of the cowling. During flight, temps were a mere 4 to
6F
> over ambient. Upon shutting down the engine, temps started to rise to
about
> 50F over ambient.
>
> This for a water cooled Subaru engine, radiators in the wings of my
aircraft
> and no baffles at the top of the engine. Measurement taken at the top of
the
> firewall.
>
>
> > -----Original Message-----
> > From: owner-engines-list-server@matronics.com
[mailto:owner-engines-list-
> > server@matronics.com] On Behalf Of Gene Smith
> > Sent: zaterdag 26 november 2005 4:31
> > To: engines-list@matronics.com
> > Subject: Re: Engines-List: Aluminum tape
> >
> > --> Engines-List message posted by: "Gene Smith" <esmith6@satx.rr.com>
> >
> > Hans..........Lets go back to basics, maybe we are way off base here if
we
> > have a drastic different type of aircraft...I have a Van's RV-4, with a
> > Lyc.
> > 0320 160 Hp...Please identify your type of aircraft and the engine you
> > have......Thanks.......CHEERS!!!!
> >
> >
> > ----- Original Message -----
> > From: "Hans Teijgeler" <hans@jodel.com>
> > To: <engines-list@matronics.com>
> > Subject: RE: Engines-List: Aluminum tape
> >
> >
> > > --> Engines-List message posted by: "Hans Teijgeler" <hans@jodel.com>
> > >
> > > I taped mine on a clean cowl (newly made). It has lasted very well.
> > >
> > > Hans
> > >
> > > > -----Original Message-----
> > > > From: owner-engines-list-server@matronics.com
> > [mailto:owner-engines-list-
> > > > server@matronics.com] On Behalf Of Gene Smith
> > > > Sent: vrijdag 25 november 2005 18:35
> > > > To: engines-list
> > > > Subject: Engines-List: Aluminum tape
> > > >
> > > > --> Engines-List message posted by: "Gene Smith"
<esmith6@satx.rr.com>
> > > >
> > > > You are correct Jim Stone...........If that tape doesn't curl, then
> > they
> > > > don't have a heat problem in that area...Also the inside of the cowl
> > has
> > > > quite a bit of residual oil and etc. which makes the tape adhesive
> > unable
> > > > to stick very well...(it is almost impossible to clean it
> > enough)...Maybe
> > > > it would last for one flight????......................CHEERS!!!!
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
> >
> >
> >
>
>
Message 2
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| Subject: | Just A Few More Days Left; Lagging Behind Last Year... |
--> Engines-List message posted by: Matt Dralle <dralle@matronics.com>
Dear Listers,
There are just four more days left of this year's List Fund Raiser! Response has
been very good, but we are behind last year as far as the number of people
that have made a Contribution and as a percentage of the total number of subscribers.
Please remember that there isn't any sort of commercial advertising on the Lists
and the *only* means I have of keeping these Lists running through your Contributions
during this Fund Raiser.
Please make a Contribution today!
http://www.matronics.com/contribution
Thank you!
Matt Dralle
Matronics Email List Administrator
Matt G Dralle | Matronics | PO Box 347 | Livermore | CA | 94551
925-606-1001 V | 925-606-6281 F | dralle@matronics.com Email
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