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Bob, for what it's worth. My engine is street ported
and I have been turning mine over both ways for years and at least have not yet
encountered any side seal problem. I suspect that your are right - it
depends how much porting has been done. Unless there is something for the
end of the side seal to catch on (like the edge of a ported intake), I don't
think there is much danger. The obvious question, of course, is how much
porting is too much. Also the Renesis may be considerably different in
this regard
Ed
Sent: Tuesday, October 05, 2010 11:06 PM
Subject: [FlyRotary] Re: Got Pressure! and really scary
moment
I have hade Bernie's engine sitting in the garage for the past 3 years.
I have occasionally squirted air tool oil into the rotors and turned
the engine over by hand. It has given me six good chugs each and every
time, but I will add that the garage is on the same air system as the rest of
the house. What I didn't know until Carlos mentioned it at Tracy's a
couple of years ago was not to turn the engine backwards if you have any type of
enlarged porting, the side seals could hang in the port and break. His
demonstration showed how easy it could happen. Well up until then I would
just turn the engine any old way just to get it around. This engine has
been street ported and I hope that I have not done any damage to the side seals
, but I figure that if I have then the engine would be extremely hard to turn
over, and it isn't.
Bob Perkinson
From: Ed Anderson
<eanderson@carolina.rr.com>
To: Rotary motors in aircraft
<flyrotary@lancaironline.net>
Sent: Tue, October 5, 2010 8:41:15
AM
Subject: [FlyRotary] Re: Got
Pressure! and really scary moment
Chris, in hot humid weather when I had my intake manifold
off for six week, I came back and cranked to find absolute NO compression out of
either rotor. Dropping the exhaust and looking through the exhaust port I
could see what appeared to be a light sheen of rust on the rotor. This
happened right after my HALTECH (pre EC) fuel injection system had failed
locking the fuel injectors wide open and raw gasoline poured out the exhaust -
probably cleaning any of the oil that would usually linger on the insides of the
engine.
It took me about 4 days by spraying penetrating oil and
poking with a brass bar to work the apex seals loose again - ALL BUT ONE.
It finally took a tear down of the engine and a punch to remove the remaining
apex seal. The moral of the story if you are going to leave the engine
open to a humid environment for any period of time. I would pour some marvel
mystery oil, ATF or something similar into the chambers and rotate the engine
every 2 weeks.
So you are probably OK - those seals will stick, most
often running the engine will break them loose, but better they are loose before
running the engine in my opinion.
Ed
Sent: Monday, October 04, 2010 11:37 PM
Subject: [FlyRotary] Got Pressure! and really scary
moment
Got pressure! That is not a question, that is a statement. I
put the engine back on the plane today and I have oil moving freely and in
a constant stream coming from the front of the engine
when I crank the engine over.
I currently have sent all my hoses off to a friends shop in AZ to
have them pressure tested. So it will be a bit before I can try starting it
again.
I did have a pretty scary moment. While I was cranking the engine
over and seeing a good stream of oil, I noted that I was only getting four chugs
of air coming out of the rotors instead of six. YIKES. I took a
breath and looked in the spark plug holes in the second chamber where I could
only feel one puff of air coming out. I could visible see all three apex
seals, but who knows. So, I got some penetrant and sprayed it onto the seals and poked
them a bit with a small long probe. They all seems springy and intact. After this little procedure , I could hear and feel the six chugs I
have come to know.
If I get out there tomorrow, I will check to see/hear if all the chugs are
still present. I will keep my fingers
crossed.
Chris
Houston
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