Proofreading, anyone??!?!?!
The Sopwith Pup replica has a 1,000 hp engine that weighs 700 lb.??!?!?!
And the original Pup had a 50 hp engine that weighs 1,000 lb.??!?!?!?!
I'd be inclined to drop some zeros and propose a 100 hp, 70 lb. engine on the replica, and a 50 hp, 100 lb. engine on the original.