Back from the dead

[askmrjesus]

An old friend just sent me the before and after shots of a bike he's been working on for a year.

1952 Ariel Square Four, just waiting on the tank to come back from the paint shop.

JC

[Dave]

Sweet!

[OneSickPsycho]

that's freakin perty.

[Particle Man]

Damn, that's some nice work

[Dave]

Very interesting motor. Are those cranks counter rotating? Timing it must be a bitch

[Trip]

nice rebuild

[askmrjesus]

Originally Posted by Dave

Very interesting motor. Are those cranks counter rotating? Timing it must be a bitch

Yes, yes and yes.

And my bad, it's a 1956 model.

JC

[askmrjesus]

A cut away view of the '39 model, (same basic design).

Check out the camshaft location.

JC

[Dave]

Originally Posted by askmrjesus

A cut away view of the '39 model, (same basic design).

Check out the camshaft location.

JC

Excellent, from the description I read I had thought the cranks were mounted longitudinaly but this makes
More sense with a drive chain. That in block cam, looks like just one to drive both banks? How'd they swing that if they counter rotate?

[askmrjesus]

Originally Posted by Dave

Excellent, from the description I read I had thought the cranks were mounted longitudinaly but this makes
More sense with a drive chain. That in block cam, looks like just one to drive both banks? How'd they swing that if they counter rotate?

That's a good question. I've never had one apart, but the two crankshafts are coupled by two geared central flywheels, so that explains how they counter rotate. How that works with the camshaft, I'm not sure. I would think that the camshaft is somehow geared to those flywheels.

I'll ask my buddy WTF is going on in there.

JC