Boulton & Paul P108 Balliol / Sea Balliol

The Balliol was originally designed as an all-purpose advanced trainer to be fitted with an Armstrong Siddeley Mamba or Rolls-Royce Dart turboprop engine.

Three versions were produced:

Balliol T.1 three-seater with a Mamba engine, first flown in prototype form on 24 March 1948 to become the first aeroplane in the world to fly solely on turboprop power

Balliol T.2 two-seater, produced for the RAF (162) with a 928kW Rolls-Royce Merlin 35 piston engine

Sea Balliol T.21 for the Royal Navy with deck-landing capability (30 built).

Balliol T.1
Engine: 1 x 1000shp Armstrong Siddeley Mamba
Take-off weight: 3562 kg / 7853 lb
Empty weight: 2724 kg / 6005 lb
Wingspan: 11.99 m / 39 ft 4 in
Length: 11.13 m / 36 ft 6 in
Height: 3.23 m / 10 ft 7 in
Wing area: 23.23 sq.m / 250.05 sq ft
Max. speed: 494 km/h / 307 mph
Ceiling: 11201 m / 36750 ft
Seats: 3

Balliol T.2
Engine: 928kW, 1245 hp Rolls-Royce Merlin 35
Cruise: 200 kt @ 10,000 ft.
TO dist 50ft: 1350  ft.
Seats: 3

Sea Balliol T.21
Engine: Rolls-Royce Merlin 35, 1245 hp
Wingspan: 39.337 ft / 11.99 m
Length: 35.138 ft / 10.710 m
Max take off weight: 8412.1 lb / 3815.0 kg
Max. speed: 250 kts / 463 km/h
Range: 573 nm / 1062 km
Seats: 3
Armament: 1x MG 7,7mm, 4x 27kg ext.