Needed a fist full of nuts and bolts for the prop.
Drilled out the prop, cut the bolts to length, fitted with a nut, a dab of thread locker and sorted.
The 9b was a powerful beastie for it's time, 130hp and more torque than it knew what to do with when all cylinders were firing.

This always led to the Camel's habit of trying to bank when the engine was at full power.
A noted trait that could and I believe did turn out to have unfortunate consequences for the inexperienced pilot.

Manufactured in France and England, each one at the time cost some 907 sterling in 1917.
Some 35 more than a Camel airframe actually cost.