Speaking of engines, I was checking out the moller internaltional site (Molle Aircar) as I have for the past decade+ to see what if any progress he is makine, lol, I have noticed that he has an engines tab, that leads to http://www.freedom-motors.com/ http://www.freedom-motors.com/ page. They are working on light weight rotary engines, a few models look like a perfect fit for ultralights. They have at least 13 models ranging from 2.5 HP to 270hp, and several in the range of 28 to 100hp, that would work outstandingly well on a Thunder Gull. They are only producing a limited amount of engines right now, but they look very interesting...
According to their page...
High power to weight ratio
More than 1.5 HP per pound of installed weight in high-performance versions
Compares with .6 HP/lb. to 1 HP/lb. for 2-strokes and .3 HP/lb. to .65 HP/lb. for 4-stroke pistons.
High power to volume ratio
Few moving parts
Moving Parts - only 2 for single rotor engine.
Compares to 7 parts for 2-stroke and 25 parts for 4-stroke piston with same instantaneous output torque.
Solid fuel economy
Specific Fuel Consumption < .45 lb./HP-hr ~ (stratified charge). Expect <.4 lb./HP-hr when both stratified charged and direct injected.
Compares to .65 lb./HP-hr for 2-strokes and ~ .4 lb/HP-hr for the best 4-stroke piston.
Proven multi-fuel performer
Demonstrated on gasoline, natural gas, alcohol and propane
Spark-ignited diesel, kerosene and jet fuel
Is anyone flying rotary engines now that you (or other people in this group) know of, especially ones from this company, (but the question is for any rotary engine users)?
Rotary (wankel) engines?
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jaimesadasalinas
Re: Rotary (wankel) engines?
Besides what you have stated, my (limited) knowledge of Wankels tells me
that they are incredible smooth in vibrations, but terribly loud in noise
terms
They are also prone to premature sealing gasket wear
Bsfc figures quoted by you seem a little optimistic
20% above that, is very believable
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that they are incredible smooth in vibrations, but terribly loud in noise
terms
They are also prone to premature sealing gasket wear
Bsfc figures quoted by you seem a little optimistic
20% above that, is very believable
--
The information contained in this message is being sent to the intended
recipient and contains PRIVILEGED/CONFIDENTIAL information. The
modification, retransmission, disclosure, copy or other use of such
information by persons other than the intended recipient is strictly
prohibited. If you are not the intended recipient please advise the sender
immediately by reply e-mail and delete this message and any attachments
without retaining a copy. Thank you.