Bulent Aliev wrote:

And here is the stock turbo. no wonder it failed. the lower red

circle is

where it had been for 2 hours when it failed.  The upper red circle was
where I spent about 15 min earlier in the flight.  Perhaps the damage
started to occurred then.

Dave Leonard

OK I think I know what Dave is saying. As I recall he had it up to 17,000
feet for a short period of time. Pressure at that altitude is about
13 inches Hg 2.2 times that is 28.6 inches of Hg if he was seeing 28.6
inches of Hg on the manifold pressure gage he was indeed on that part of
the TO3  50 trim map. The lower mark is pressure ratio of about 2 so
that would put him at 32 to 33 inches at about 12,500 feet.

Paul Lamar

Paul, that is correct.  I have also added in a couple other corrections that
we need to consider such as a 1-2" pressure drop across the intercooler and
intake, then perhaps a 1/2" pressure drop at the inlet of the turbo if it is
not given good cold ram air.

Dave Leonard

Have you started work on your TO4 installation Dave?

Paul Lamar
 
The Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2004 All world wide rights reserved.