Paul,
Yes good points. I should have thought about the engine size.
For your info. I would like to mount the water pump remote for several
reasons. Probably my biggest concern is if the standard pump will be
adequate enough under a 50% increase in HP. I happen to believe like you
that in order for the rotary installations to the GA community's interest we
have to size the cooling system for the worst conditions. I don't know much
about your custom design pump though I am interested to hear about it. As
water pumps go I would prefer a style that has the inlet near the center of
the impeller and a mounting location that keeps the pump inlet flooded and
without drastic changes in flow direction before the inlet.
Additional considerations:
1. Wanting the engine parts to stay within the top cowl limit of my
airplane design. The SeaWind engine moment is already quite high and the
cowl draggy
2. The desire to use the narrow SeaWind motor mount and develop a mounting
system using the earlier 13B front housing. I did a lot of drawings to try a
S. beam style mount believe me but with the supercharger on one side near
the front and the turbo compound on the other side. it doesn't look like it
will go unless the beam is very wide or a new wider engine mount is
fabricated. (See next point)
4. The intent to reduce cowling drag of the standard cowl now width 39" by
reducing it to under 30" at the engine midline.
Yes I am working on the Rhino drawings now:) The water pump dimensions are
still an unknown however.
DougFir
Actually if you butcher the stock 13B pump you can convert it
to remote use by welding or bolting a plate on the output
end and welding a tube to the plate. I also have one or two
casting left I will sell and ship.
----------------------------------------------------
Here are some more 3D's on the remote pump plumbing.
Not mentioned recently is one advantage of the remote pump
is it lowers the water level one can have in the block and still
have the pump not cavitate... in case of a minor water leak.
Here is what happens if the water level drops too far and
the pump cavitates.
One of the things the stock pump has going for it is
....the faster you run it (up to a point) the more water
and pressure you get out of it so high power/high
RPM AC engine use will receive an adequate rate of water flow.
Paul Lamar
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