Just in the last few days of excellent cooling discussion, I have
been bothered by the vague pressure recommendations. I don't know at
all at what pressure the floating piston design should be operated
at?. Or in a conventional system should we be copying the
Continental system at 50 PSI? That number seems bazar. Or is 23 psi,
the highest cap rating I have seen, O.K? I think Ken said he is
operating with a 15 psi cap at altitude. There is an upside to high
pressure, higher boiling point and a downside, leaks. Back to the
floating piston design, can the pressure just be set where ever we
want by adding air below the floating piston?
Sorry, but just a few days ago I thought I understood my cooling
system. Jerry
I generally run an 18 psi primary and a 12psi secondary for 30 psi
total. However the pressure never gets that high as the air spring
accepts all the coolant expansion without reaching 30 psi.
Dave Leonard
--
Dave Leonard
Turbo Rotary RV-6 N4VY
http://members.aol.com/_ht_a/rotaryroster/index.html
http://members.aol.com/_ht_a/vp4skydoc/index.html
I don't see how you figure they are in series Dave.
When the first cap goes off the pressure in the second chamber
will become 33.5 psi absolute immediately which will over power
the 12 pound spring in the second cap. These caps operate
on spring pressure. Here is a diagram.
BTW do you have a 3 to 4 inch micrometer for measuring the rotor
housings?
Paul Lamar ...No rotor no motor.
Iv'e got two rad pressure caps, one is 23-25 LBs, and the other is 27-29
lbs. I got them from JEGS, they are made by Moroso. The 27-29 will be on
the radiator, which is below the engine, and the 23-25 lb will be up
high on the water pump filler.
Brian Trubee
In effect you only have one... 23-25 psi. the other one will never get
a chance to operate.
Are you trying to use these is series?
Paul Lamar ...No rotor no motor.
The Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site.
http://www.rotaryeng.net
Copyright 1998-2005 All world wide rights reserved.