Today's Message Index:
----------------------
1. 01:01 PM - exhaust pipe clearance (Fred Klein)
2. 02:32 PM - Re: exhaust pipe clearance (Jerry Rehn)
3. 03:21 PM - Re: Re: undercarriage retraction problem (Rowland Carson)
4. 04:36 PM - Re: exhaust pipe clearance (Fred Klein)
Message 1
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| Subject: | exhaust pipe clearance |
Gentlemenheres a situation and a question:
I have maintained 1.50 inches clearance between the inside surface of my lower
cowl and my engine exhaust pipes. I set this up w/ the assumption that this would
be adequate considering that I have used a
high temperature flame retardant resin (HTR250FR, by Resin Services, Inc.) for
my custom cowls. It maintains a Flexural Modulus at 350 degrees F. of 6.25 x 36,000
(whatever that means).
Would anyone be willing to opine on the advisability of applying some aluminized,
adhesive-backed, heat barrier, to reflect radiant heat away from the cowl surface
and back towards the engine and exhaust?
(This so-called heat barrier is a composite consisting of aluminum foil on a backing
material which looks like burlap to which is applied an adhesive good for
350 degrees F.)
(I have a total of 10 sq. in. of inlet and 14 sq. in. of exit area for air circulation
within the cowl.)
(Obviously, this is not a 9xx Rotax installation.)
Comments and opinions appreciated in advance,
Fred
Message 2
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| Subject: | Re: exhaust pipe clearance |
Fred
First, I have a Rotax 914. I had a little discoloration from exhaust heat on the
cowling near the exhaust pipe exit. Probably less than an inch clearance. I
used simple aluminum backed tape on the cowling, it is usually good for 2 or 3
years before I replace it, works fine, is light, eliminates further Issues to
cowling. Keep it simple and light. You may not even have an issue with an inch
and a half clearance . Wait and see, you may have good circulation of air
and your cowls sound robust for heat.
Can't wait to see you flying over Roche!
Sent from my iPad
> On Jun 10, 2015, at 12:59 PM, Fred Klein <fklein@orcasonline.com> wrote:
>
>
> Gentlemenheres a situation and a question:
>
> I have maintained 1.50 inches clearance between the inside surface of my lower
cowl and my engine exhaust pipes. I set this up w/ the assumption that this
would be adequate considering that I have used a
> high temperature flame retardant resin (HTR250FR, by Resin Services, Inc.) for
my custom cowls. It maintains a Flexural Modulus at 350 degrees F. of 6.25 x
36,000 (whatever that means).
>
> Would anyone be willing to opine on the advisability of applying some aluminized,
adhesive-backed, heat barrier, to reflect radiant heat away from the cowl
surface and back towards the engine and exhaust?
>
> (This so-called heat barrier is a composite consisting of aluminum foil on a
backing material which looks like burlap to which is applied an adhesive good
for 350 degrees F.)
>
> (I have a total of 10 sq. in. of inlet and 14 sq. in. of exit area for air circulation
within the cowl.)
>
> (Obviously, this is not a 9xx Rotax installation.)
>
> Comments and opinions appreciated in advance,
>
> Fred
>
>
>
>
Message 3
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| Subject: | Re: undercarriage retraction problem |
On 8 Jun 2015, at 08:38, Remi Guerner <air.guerner@orange.fr> wrote:
> What type of tyre did you installed? 7.00x8 or 8.00x8
Remi - my tyre, as supplied originally with the kit, is marked 8.00-6. I am intending
to adjust the up gate of the retract lever and then re-set the flap travel
- I already have my new FL19 from Karen at the factory.
in friendship
Rowland
| Rowland Carson ... that's Rowland with a 'w' ...
| <rowlandcarson@gmail.com> http://www.rowlandcarson.org.uk
| Skype, Twitter: rowland_carson Facebook: Rowland Carson
| pictures: http://picasaweb.google.com/rowlandcarson
Message 4
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| Subject: | Re: exhaust pipe clearance |
> On Jun 10, 2015, at 2:31 PM, Jerry Rehn <rehn@rockisland.com> wrote:
>
> Keep it simple and light.
Jerryapropos weight, here are my preliminary numbers subject to
finish paint, ELT, and some tools:
> 2. XX Mar 14 using W. Munich=99s acft scale w/ 4 qts oil + 1
gal. coolant placed top of cowl:
> Main Wheel: 757.0#
> Tail Wheel: 77.8#*
> Total: 834.8#
>
> * Includes blocking weighing __?__
>
> C of G: 60.67=9D
>
> NOTE: Batteries are mounted on FG platforms which have
NOT as yet been bonded in place and are
free to slide fore or aft in accordance w/ C of G requirements after
ALL components have been installed.
>
> NOTE: Engine requires 5 quarts of oil because of
increased volume of oversized filter.
All in all, I confess to having been both pleased and surprised
F.
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