Recent content by Niels

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    Bespoke 3 cylinder Radial, 75KG - 160HP

    It is almost 19m/sec piston speed or more than double Lycosaur values.TBO? Rotax was the first to succed gearing a fourcylinder fourstroke to a prop and earn money. Going from three to prop will be difficult unles they go electric
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    The CFM Shadow - thoughts, opinions?

    What have been the designers reason for investing so much love and care in a concept that showed up as a dead end?
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    The CFM Shadow - thoughts, opinions?

    Powerplant makes 50 hp to a reduction gearbox that turns a single 1320mm prop. Two 930mm props mounted 950mm apart left and rigth give same efficiency as the former big single. Maybe even a little better as inflow to the combined disc area is not so blocked by the fuselage. FOD can be less due...
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    Future utility piston engine aircraft?

    Have You told Achates;Cummins and the Army? There is some further reading here:Junkerators
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    Future utility piston engine aircraft?

    It is two stroke opposed gas engine as made by Faibanks Morse from1936 until today and used in submarines. The new twist I made in 1992 was to prove that the two cranks can stayin synchronisation if the two generators are three-phase synchroneous type. Most modern day electric super...
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    Future utility piston engine aircraft?

    The genset scheme I have in mind is illustrated here
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    Future utility piston engine aircraft?

    And so what? Rotax make 60kW for 60 kg or thereabout. If the petro electrical can better it why not?
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    Future utility piston engine aircraft?

    The LOM M137 engine weighs 147kg ,is 6 litre and work at a mean effective pressure of 9,6 bar and piston speed is 10,6 m/sec. This is an inverted straigth six having a compression ratio of 6,3. If we cut two cylinders free,throw away the cylinder heads,camshaft rockers and valves and weld the...
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    Future utility piston engine aircraft?

    Two person small aircrafts need 60kW and a prop doing not much more than 220m/sec tipspeed. Rotax 912 does fine and sells a lot. It has been described and accepted by some that a petrol electric drive system can compete and maybe even be better. The idea of making two gensets of 30kW from an OK...
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    Future utility piston engine aircraft?

    Nice to see some possible numbers from our most far off neighbours (Antipodeans?) Thank You
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    Future utility piston engine aircraft?

    The Slowenian Emtrax 30 kw machines are 7kg each and the 60kw is 12 kg that is26 kg. It is here it will be nice to know motor part pure of the 912. 34kg motor pure is at least 1.75 litre and that can surely make 60kW.Rotax uses 1.25 If the two gensets are put on the wings where struts from...
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    Future utility piston engine aircraft?

    There's also a lack of tolerance among the folk here for vaporware. Fakes and con men are legion in the field of "Green" stuff. It can be hard to separate the real seekers from the dishonest thieves, I'm sure you've noticed. And sometimes the answers to legitimate questions don't make people...
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    Future utility piston engine aircraft?

    Pure nonsense. It is very honourable that failures of the Lycosaurs maintained by You was pilot errors exclusively. If MTBF is not relevant for aircraft engines, we would be flying two stroke Rotax and McCulloughs only.
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