Help designing a compact and low friction one way clutch?

[Lego Dino 500]

I'm trying to design a realistically functioning model of a diesel locomotive. I don't care about looks at this point, given how limited my collection is, but what I'm wanting to aim for is a locomotive that appears to operate realistically. The chassis is going to be 6 studs wide for now as a prototype, and 46 studs long. In order of the drivetrain, it's going to be M-motor -> one way clutch -> flywheel -> forward/reverse gearbox -> trucks. This should allow the locomotive to realistically creep forward, move, and slow down gradually as if it were an actual diesel locomotive with a fluid drive transmission, or like HarmanMotor's fluid drive bus. The only problem I'm encountering so far is a compact, low friction one way clutch design. I've tried the one design made with the 3 rubber 2 stud lifters, but that doesn't work. It's too large and I can't get it to function properly without a large flywheel which wouldn't fit in the body, or base of the locomotive. I'm trying to design something compact enough you could put it inside the base or body of any diesel or electric loco, and dramatically improve the functionality. Any help?

[Ngoc Nguyen]

I think you can check out the ratchet mechanism in the Helicopter 9396. The ratchet there is used to make sure the rotors only spin in 1 direction.

[Lego Dino 500]

I think you can check out the ratchet mechanism in the Helicopter 9396. The ratchet there is used to make sure the rotors only spin in 1 direction.

When the motor disengages, does it keep spinning? That's the function I'm attempting to achieve.

[AkiyamaWataru]

You could check nicJasnos clutch design, maybe that will fit your needs.

Here is his Video

[Vectormatic]

When the motor disengages, does it keep spinning? That's the function I'm attempting to achieve.

Not sure how 9396 works, but i have 8232, and it also has a ratchet mechanism, the blades keep spinning when the driving force stops

[allanp]

Yes the rotors of 9396 do keep spinning.

[Ngoc Nguyen]

I think due to the weight of the blades, the inertia of the rotor is high, so it's inevitable that the rotors still spin when the power disengages.

[allanp]

Yes but there is a ratcheting gear setup which allows the blades to continue spinning without having to back drive the motor when motorised and the motor is turned off.