Hmmm... good question that Don.

I would say (from memory) that at the firewall (which is 110-115 mm back from the front of the cowl) i had the mounting holes about 4mm offset (up and to the left) so that the prop would be dead centre at the front of the cowl.

I have actually just come back in from the shed having just re-fitted the cowl after adding another 6 or so ounces (she is still 20% lighter than a club members 48" Camel). I took the opportunity to Eyeball the right thrust and I'd say that the starboard prop tip a good 5mm closer to the plane of the front of the cowl than the Port tip (12 x 6 APC).

To my eye, 2-2.5 degrees is slap in the face obvious. If you can't see the side thrust with your naked eye, you probably don't have quite enough.

And yes, I know that my rigging is purely cosmetic. But I cannot stand to see WWI subjects that are lacking flying and landing wires.

Cheers,

Hugh