The engine is lost in the cowl :-)

I think I'll put a huge muffler in there :-)

I have some more ideas on the cooling baffles. Do away with at least
one :-)

Paul Lamar


That looks great  with all that room.  I think it would be ideal for
fitting to my Barber Snark  although I would only need about 105 HP
as that would easily allow me to exceed VNE of 140Kn. You mention
making the body out of block of steel but what grade of steel would
be best and what would you estimate machining cost at? If more that
one off to be done would it not be best to rough cast the shape and
then finish of with the NC machine centre allowing some flats for the
heat sinks. If the price to build is low enough you would be able to
compete in the drone market as well as small aircraft. If enough
rotary enthusiasts go together they could form a viable engine
company.

Colin Dale

You don't have to open the throttle all the way.

Here that cooling idea I had. Works well for the top heat exchanger.

We need an experienced corporate  CEO.

Paul Lamar


Greetings, Paul For the past several months I have been searching
the internet for all things pertaining to rotary, in an effort to
prepare a start up business plan, producing rotaries to satisfy a
substantial angel funder.

The intended market is, ultralight high power motorcycles, off grid
energy and of course aviation.

We are seeking a highly experienced over qualified aeronautical
engineer and mechanical/machine shop owners to negotiate coming on
board to finalize engine physics and production processes. Initial
single rotor Engine sizes: 5hp, 30hp, 50hp, 100hp. (Much larger
multi rotors to follow)

Proprietary Compound turbo exhaust energy recovery systems capturing
kinetic and heat  energy are a paramount requirement.

It has so far been determined that an engine based on a forged hard
chromed chromoly ring overlaid with a carbon fiber honey comb filled
with ceramics. Finished for strength/final shapes automatically
wrapped in sufficient layers of carbon fiber material by high
pressure molding technics will likely to produce a highly
efficient,light weight affordable product. Respectfully awaiting
your questions/responses. Thank you,

Michael Nash

Staunton, Virginia

You are on the bleeding edge there. You won't save a lot of weight in
the overall product. Make the rotor housing out 4340 or 4130 and let
it go at that. It only needs to be 1/4 inch thick roughly. Add
aluminum heat sinks as necessary. That is a much easier R&D program
to fine tune the thermal characteristic.

Is Staunton Miltary Academy still in Business? Fork Union used to
play foot ball with them. I went to Fork Union.

Paul Lamar

4130 was the ticket. I agree air cooled works best for the 2 small
engines. Nice kiss. A couple Aixro xr 50's with H2o/Al injection
added will be put into a couple Kawasaki 250r's  near twice the hp
and torque. Just for fun and a test bed for exhaust development. Just
got air flow numbers from them this morning.

SMA closed and now is a museum/retreat according to the signs. Thank
you, Michael Nash

Fork UInion is struggling as well. The middle class is disappearing.


Paul Lamar


For a rotor housing, would it be possible to start with a large OD
thick wall pipe cut to approx rotor width then deform it to a rough
housing shape using a hydraulic press?

Robert LeClercq

If that works that  would save a lot of money. Maybe heating it first
to make it easier to form.

Please research thick wall pipe for us.


Paul Lamar



Paul

Here are a few:
http://specialtypipe.com/home/products/large-diameter-seamless/
https://stainlessandalloy.com/stainless-steel-seamless-tube/
http://specialtypipe.com/home/products/large-diameter-seamless/?gclid=CJzRz_3DkNACFQgpaQodKKkEBQ


http://www.pennstainless.com/stainless-products/pipe-and-tube-stainless-steel-products/stainless-steel-seamless-pipe/

Stainless and hot rolled steel are available as seamless too. OD and
wall thickness will be determined by how closely the deforming comes
to the desired trochoid shape. I suppose after bending that annealing
would be required. Mazda inner circumference is 27"+/-. So about 8.5"
tube ID.

Robert LeClercq

That sounds reasonable. Thanks Robert.


Paul Lamar


Thank you, Robert. The undersize tube can easily be swaged down a stretching
mandrel with the correct finish shape. Stainless takes case hardening really easily
and does have better thermal value than 4130.
Michael Nash


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