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Thanks for the info, Jerry.
Who knows with all this interest in a PP - perhaps a
running 2 rotor engine with PP will show up on the list - we all know Richard
has a one rotor PP running.
Ed
----- Original Message -----
Sent: Thursday, June 21, 2007 9:11
AM
Subject: [FlyRotary] Re: PP construction
methods
Thanks, I made two of them about two years ago. Now
that I am building a single rotor, I have the luxury of having a back up
housing. A 1.5" i.d. port is not so small when you look at it in
real life. Its size guarantees an easy life for the tip seals.
Because of the thick wall I was able to put in several deep grooves before
pouring in the epoxy. A word on epoxy. I totally disagree
with using JB weld. There are epoxies designed for this type
application. One is Duralco 4525. It is intended for high
temp (500º), high performance bonding. Expensive but worth the piece of
mind. In application, it is extremely thin and very slow curing and thus
will flow completely to fill the cavity around the insert.
Mine took an entire day to set up. Google Duralco 4525 if
interested. Jerry
On Jun 21, 2007, at 8:39 AM, Ed Anderson wrote:
Nice looking P port, Jerry.
Ed
----- Original Message
-----
Sent:
Thursday, June 21, 2007 8:09 AM
Subject:
[FlyRotary] Re: PP construction methods
George,
???
Let me get this straight.........Steel tube TIG welded to steel
insert.......Then aluminum
insert with O-ring (s) to
seal to the steel tube.......? A sketch would be worth a
thousand
words for the engineering
challenged........
--
Kelly Troyer
I would advise against welding anything to
the liner. The housings are actually very flexible,
and will soon warp in favor of the weld
beads. A thick walled aluminum tube in a very light press fit through
the inner wall.?Same through the outer wall, but not tight through the
outer wall is also fine. The inner wall needs good support to prevent
chrome cracking when you torque up the stack.
?
Lynn E.
Hanover?
Lynn,? similar to this?? My
inserts(throttle bodies).? They are 2.25 o.d. and 1.5 i.d.? 6061 T6 ?
?Jerry
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