Don't have exact figures on all your questions but here's what I
have. See answers embedded in message below.
Hi Tracy;
I've been looking at your web/posts of your cooling
tests.
The air delta T of 70-80F across the thick GM cores in cruise seemed
to
work quite well.
A few questions on your current rad
setup:
What are core the dimensions? H x W x 3.75"
9 x 9 on left side, 9 x 10 on right. (not
counting tanks)
Inlet size?
5/8"
outlet size?
3/4" ( both are in parallel, never had a problem with flow
distribution)
Inlet distance from the core? (2-8"?)
3 - 8" (core is not square with inlet)
outlet distance from the core? (40"?)
Outlet? what outlet? Air just finds its way to the cowl outlet at
aft bottom edge. No room for a discreet outlet so distance is sort
of irrelevant. It is a tortuous path but losses are not a big
factor since velocity out of the rad is about 10% of
airspeed in a low drag liquid cooling system. That is why
delta T is so high too. (This is a subject of much argument on
'other list' : )
Approximate HP/IAS/water temp at any cruise/climb points?
All temps greatly depend on OAT. Temps rarely stabilize in max
power climb where HP starts at around 170 (restricted by rpm & fixed pitch
prop) because HP is dropping due to density at altitude and OAT is going
down. Remember that ROC is about 2600 FPM at WOT so these things are
changing fast. I climb at an IAS of 120 mph. Only recently
fixed all the details on the latest cooling config. so have not done any
summer testing. Its working very well though. Can't maintain cruise
oil temp over 150 F in winter, which is too low, need a cowl flap to bring
this up.
Tracy