Paul, if it makes you feel any better, I plan on using all your data so far, and will be
installing my rad under the engine.
Some people just need a little more persuasion.
Tom Webber.

I agree. Sometimes I think I need to give a course in graph
reading 101. It is so frustrating sometimes. I dug up everything
I could find on aircraft liquid cooling systems  for the last four
years, spent hundreds of dollars on technical books and papers,
flew around the country with my water manometer testing peoples
airplane, spent a couple of weeks building a rad air flow test rig
for the van, nearly got thrown in jail for bombing a shopping market,
spent thousands if not tens of thousands of hours on the internet
and some people just don't get it.  Certain people do not counter
with new data or even dispute the data offered with other data

>from other sources but merely express their uneducated

gut felt negative opinion. Or perhaps they have an agenda. I think
I am dealing with more than just ignorance.

Bernie Kerr has an excuse. He is not on the list.

Just to reiterate here are some pertinent graphs from Kuchemann & Weber
yet again. Placing a large rad within ten to fifteen inches from the block,
intake manifold, exhaust manifold (no matter how cool) or firewall is a
no no if you want it to work well. It is particularly important
with a two inch thin or thinner rad (what we are dealing with here) as
the flow velocity is higher than about 40% of the forward velocity.

This causes an impact pressure build up on the obstructions
which in turn reduces the flow through the rad. If you want your
airplane to cool make absolutely sure the back of the rad is
totally unobstructed.

Paul Lamar

I agree from personal experience Paul. My rad is under the engine, the
only possible
place to put it.  I put an exit duct on the rad and the cooling went to
hell, had to remove it and leave it open to the breeze.
I now have big louvres on the upper cowl above the oil cooler, so it's
probably about as good as it's going to get for the oil.

Perry

I forgot to mention yours Perry. Sorry.


BTW Perry is using a tiny water rad compared to all other rotary
installations I have seen so far. My guess is about 13 by 15 by 1.75.
What are the dimensions Perry.

Paul Lamar
 
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