BTW its the first time that I seen #3, wonder how much HP can you get out of that thing

Not that I'm an authority on engines but it's listed on the placard as a Siddeley-Deasy Puma. This was rated at 230 hp.
http://100.rolls-royce.com/people/view.jsp?id=144After a spell with the Wolseley Tool and Motor Car Co owned by Vickers, he (John Siddeley) moved on to become Managing Director of the Deasy Motor Car Manufacturing Co in 1909, which became the Siddeley-Deasy Motor Car Co in 1912, and then Armstrong Siddeley in 1919.
During World War I, the Parkside factory produced aircraft and aero engines under licence, followed by his own development of the 230hp Siddeley Puma, over 4,200 of which were produced for use in light bombers and several record-breaking aircraft.
It doesn't say which "record-breaking" aircraft. The Puma was fitted to the original DH9 which was underpowered & less successful than the earlier DH4.
PS. Andy. I have no idea what the gas turbine is in the last photo. It would be nice to know.
