Correct, this is a replica. A little known New Zealand film maker, Peter Jackson, is turning out these replicas and hopes to have something like 20 for an upcoming film to be produced in NZ (No digital effects for him!). There are also about 8 to 10 Sopwith Camels to fly as well. There are just not enough original engines around to power that many replicas and they have had to go with something else.
The big WW1 dogfight will be a part of the easter 2005 airshow at Blenheim, NZ. These and the previous pics are from the 2003 airshow