Here is an old message from the CD on this subject.

Bill Freeman wrote:

I really must be missing something here.  So far all the
users flying behind and in front of Mazdas have ( I think)  had at
least OK cooling, apparently with some intial airflow sorting processes,
but as I understand it, nothing heroic.

So why is it that there needs to be a 4X or 6X whatever increase
in the water flow??  Seems like just another way to get rid of
all those excess HPs laying around.

I'm confused because I expect that Jeff knows what is going
on, but I can't seem to figure out what the problem is that
is being solved. Been out in Colo at high altitude for nearly
a week, so maybe I'm still hypoxic.   :-)

Help?

Bill

 If the coolant flow is only 30
GPM in the car and guys are using smaller hoses or something in their
planes then the coolant flow will be even less.  I always try to design for
a max delta T of 20 deg F to maximize HX efficiency.  For 200 HP that takes
about 40 GPM.  The difference in cooling performance between 20 GPM and 40
GPM would be significant.  the difference between 40 and 80 would be more
modest.  If someone has an existing system (or is in love with AN-16 ;-)
then why not just improve the pump and be done with it.  It's alot easier
than a full redesign of the system.

Jeff Spitzer

I for one am ready to go to 1.5 inch Wiggins couplings.
Why suck up more HP and burn more fuel?

Paul Lamar

 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org