If you see something that does
 not     look right     please let me know.

    Paul Lamar

 Paul,
 It looks  like you could take advantage of the turbine exhaust thrust
 by  aiming the pipe rearward.  (the waste pipe also!)
 Barry  Bordes

 True but at this
 point we are just trying to get it together so we can
 run it.  Jim Mederer flew up for
 an inspection and insisted we needed an oil cooler.
 He told us the warrantee  was void unless we
 put one in so now we are  doing it to keep
 him happy. We are using a 11" by 18" by 2"
 Setrabe  AN -16 fittings in and out. It will
 be here Thursday. Cost $600.

 It is no where near big enough for continuous
 650 HP use but both Dan and
 I believe five  gallons of oil won't get very hot in 91 seconds. That is
 all  we need to get the record.

 Most of the oil coolers I can
 find today are poorly designed by being
 too  thick and not large enough in frontal area. This includes
 the  Setrabe. It is like they did not read
 the bible of heat exchangers
 "Compact  Heat Exchangers" by Kays and London or let alone my
 book  "How to Cool Your Wankel".

  Mistrale got it  right back in 2009 but I do not know their
 oil cooler supplier, I wish I did.

 However, we are prepared to  spray a lot of water on it
for evaporative  cooling effect if needed.

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

 We bought a Setrab 11 by 18 by
 2 inches thick. Not optimum by a long
 shot  but it is an oil cooler.

 Here is what it looks like mounted under the
 cross counter flow  water cooling system. It
 will add half a gallon of oil which will
 delay oil heating by 15 to 20% :-)

 Paul Lamar

Paul,
If you have any excess thermo capacity in that large water radiator
you might use a water to oil exchanger to good avail.

Barry Bordes

Excess water cooling  is an unlikely event in this case. We will probably
have to hose it down with total loss water :-) The water gets hot much
faster than the oil as there is way less of it. Maybe as little as a gallon
and a half total.

However in the case of the oil we have a five gallon oil tank
and there is not much oil in the engine at any one time. Just what
the bearings will need and a little oil in the rotors for cooling.
The oil squirter’s for the rotor cooling are only .125" diameter
max. One can't get gallons per minute through those size
holes. Even at 150 PSI.

In general water to oil heat exchangers are bad ideas as you are
putting all your cooling eggs in one basket :-) Oil is one third
the cooling.

Paul Lamar