Best non-aerobatic-cooling system design

I like this system the best for the simple reason that for a given cowl
height you can get a higher fluid level than with any simple pressurized
system. The coolant level is right up there under the pressure rad cap.
No air space required. Furthermore you can get along with a two
quart P-can. No 50 psi two gallon P-cans required.
All parts are off the automotive parts shelf including some real
fancy P-cans with sight glasses.

http://www.cantonracingproducts.com/tanks/expansion_tanks.html

The bottom of the P-can is connected to the lowest pressure point
in the system. Namely the intake side of the water pump. Pressure is
higher
everywhere else in the system. Bubbles and fluid from the vent line are
highly encouraged to flow to the top of the P-can because the top of the
block
is relatively a high pressure area.

There are no loops that can trap air when filling the system.

--
Paul Lamar ...No rotor no motor.

Paul,
Assuming the radiator is angled down in the rear, wouldn't you want the
swirl tank tap to be on the other end of the radiator. That's how I did
my system and it appears to be working well, but then it is a
cross-flow, not a dual pass design.

Mark S.

Wow! Looking good Mark. I like your plenum, intake manifold and TB. That
is a 3 rotor
right? Is that a Hoffman or MT CS prop control on the snout of the PSRU?
Lancair ES? There will be a lot of people eating their hearts out over
your airplane me included.

As far as the P-can is concerned you may not need anything depending
on how the water lines are run on the other side. Got some more pictures
of the other side? You can send hi rez and I can size them to suit
publishing.

Paul Lamar ...No rotor no motor.

Here are a couple more pictures (sorry about the blue tint on the second
one... wrong camera setting). Sorry, but I don't have any pictures
handy showing the swirl tank (firewall mounted) or the overflow tank
(also firewall mounted). The swirl tank if fed by the line coming from
the upper corner of the radiator, and returns from the bottom of the
tank to the wp inlet. It has a level switch. Instrumentation includes
coolant level, coolant pressure, and coolant temp.

Yes, the brush holder is for the M/T electric 3-blade prop. You should
recognize the bellmouth/injector castings, they are from the batch you
made up a few years back. The throttle body is a Mustang 100mm unit
from Holly made "for off-road use only". It will be fed by ram air from
the right inlet. The psru plate is a custom "9 o'clock" unit, courtesy
of Bob Darrah. It has already created quite a stir at the Lockhart
airport, and it hasn't even flown yet. However, I've done a couple of
run-ups which drew quite a crowd, only going to 4100 rpm as yet. Common
opinion is that it sounds like a Rotax on steroids. Wait 'till they
hear it at 7500 rpm. I hope to be flying by this summer.

Mark S.
Lancair ES, N/A 20B

Wonderful work Mark. Congratulations. I love the Wiggins couplings.
Really nice intake manifold.

Looks like it is OK to tap the bottom of the P-can off the intake side
of the water pump. The way you have it will also work. Don't forget
the A-can. That is where the level sensor should go.

Paul Lamar ...No rotor no motor.

--------------------------------------------------------------

Also Mark don't forget to safety wire the hose clamps holding the
Wiggins
couplings together. You will have to drill a small hole in the head of
the screw.

Paul Lamar ...No rotor no motor.

Paul,
Thanks for the tip. I hadn't thought of that, but it sounds easy enough
to do.

Mark

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