I have not read all the
suggestion about sealing the tube for a P port engine, (just got back from Brasil) so this suggestion
may have been tossed around and thrown out. If there is enough wall thickness on
each side of the cooling chamber a couple of radial groves could be cut into the
housing wall and the tube rolled into place. (Expanded internally) This would eliminate the need for any
type of sealant in the between the coolant chamber and the inner and outer
wall. If there is any doubt about
the seal, then a small amount of an anaerobic gasket sealer could be used on the rolled faces. I am not sure if a rolling tool for that
size tube would be readily available or not.
Pro Seal keeps very nicely for a
long time in the fridge
Bob Perkinson
Hendersonville, TN.
RV9 N658RP
Reserved
If nothing changes
Nothing changes
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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