I added a few detail pictures to Randy's collection
on his one rotor powered DragonFly.

It has a very interesting idea in that the Ellison carb
is mounted directly on the intake side of the turbo charger.
A very compact way to handle the intake system.
The turbo charger is not Mazda so it might be large
enough to live with a one rotor. I suggested a
Garrett turbo charger tachometer kit to keep an
eye on the turbine RPM.

All and all a pretty good installation job with the
possible exception of the motor mount. The belt drive
also needs a few improvements to the torsional
stiffness. A minor thing to improve.

We were not able to identify the ignition system yet
but it looks pretty straight forward using what
appears to be an early Mazda magnetic crank angle sensor
distributor. I think the coils came from Ellison but
I am not sure about that.

The water pump housing is custom but I do not
recognize the cartridge. It is from something
other than a Mazda. The two oil coolers are a needless
complication when one larger one will do. One of the
oil coolers is in the vicinity of the sharp exhaust pipe
bend so the bend radius would benefit from the removal of
that oil cooler.

I suggest something from the Setrab catalog pdf attached.

If the turbo charger could be rotated
180 degrees that would put the exhaust in the rear and
the carb in front which would benefit both.

All of the cooling openings need the application
of Kays and London's or Kuchemann and Weber diffusers.
The water cooler is the quick and simple type under the
fuse behind the cockpit which is very good way to go on
this airplane as it has limited volume under the cowl.

There is nothing really wrong with it and I think it will
fly as is. Keeping the turbo charger would make it a great
cross country aircraft as speed up high would be spectacular
for a such an aircraft. It would probably be the only
turbo charged DragonFly in the world.

Ed Carver and I were trying to talk Randy into keeping
the rotary :)

Paul Lamar

Paul,

Any speculation as to the HP the system would produce?
If one installed a compound turbo would two tachometers be needed on the
compound turbines respectively?

Thanks,
Gordon

Somewhere between 100 HP and 225 HP depending on the boost :)
Actually anything over about 150 HP would require the addition
of an intercooler. Maybe as little as 125 HP. One would
have to monitor the intake air temperature and keep it below
140 F.

I would think so on the series turbo chargers. Are you looking to
set an altitude record :) You are not thinking of using the boat
anchor 3rd gen RX7 sequential turbo charger setup are you?
That thing is probably close to 40 pounds while a TO4 is 16 pounds.

Paul Lamar