Colomban Luciole flies fast with a 20kW B&S V2-twin at 3600rpm to a 1.16m prop giving a tip rotative speed of 220m/sec.
Two 850mm handed props placed 600mm apart give same propulsive efficiency .
Running at 4000 rpm/66,66 rps ,noise will be much less.
A four-stroke at 66.66 rps and a MEP of 10 bar needs 600 ccm.
Opposed pistons of 65mm diameter stroking 90mm will do.
A suitable four stroke scheme:
Four stroke chain synchronized OP aircraft engine?
A shame that the creator did not cross the synchronizing chain.
Using numbers from Walter Mikron II, mass engineerable to 18 kg.
Two 850mm handed props placed 600mm apart give same propulsive efficiency .
Running at 4000 rpm/66,66 rps ,noise will be much less.
A four-stroke at 66.66 rps and a MEP of 10 bar needs 600 ccm.
Opposed pistons of 65mm diameter stroking 90mm will do.
A suitable four stroke scheme:
Four stroke chain synchronized OP aircraft engine?
A shame that the creator did not cross the synchronizing chain.
Using numbers from Walter Mikron II, mass engineerable to 18 kg.
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