Bristol 84

Intended as a Bristol Fighter replacement, the Bristol Bloodhound contributed to the development of the Bristol Jupiter engine.
Bristol 84 Bloodhound as first flown The Bristol Bloodhound as first flown with small fin and rudder and equal wing dihedral.
The Bristol Type 84 Bloodhound was a two-seat reconnaissance / fighter biplane intended to secure a contract (against Specification 3/22) to replace the Bristol F.2 Fighter.
The prototype Bloodhound (initially known as the Type 78 Fighter C) was built on a private venture basis, with a civilian registration (G-EBGG) and was first flown in late May 1923.
In its initial form, it featured modest and equal dihedral on both upper and lower wings and a somewhat small fin and rudder. Following early flight testing, revised tail surfaces and changes in engine thrust line, wing stagger and dihedral were introduced to achieve satisfactory stability and handling.
Having cured these issues, three further machines were built for the Air Ministry with different models of the Jupiter engine and received RAF serials (J7248, J7236 and J7237).
Bristol 84 Bloodhound J7237 Farnborough JupIV Aug 25 The third production Bloodhound J7237 at Farnborough in August 1925.
One aircraft (J7248) was of all-metal construction, whereas the remaining two machines had wings and tail surfaces of wooden construction. It used a Jupiter IV engine, whilst the second (J7236) had variable timing gear. The third (J7237) was fitted with a supercharged Jupiter IV.
The prototype (G-EBGG) was later refitted at Filton with a Jupiter V and flown in the 1925 King’s Cup Air Race to gain publicity for the Jupiter engine. 
Thereafter, it was fitted with long-range tanks and a 450 hp Jupiter VI and used for reliability trials.
Bristol 84 Bloodhound Jup Endurance Bristol 84 Bloodhound G-EBGG on completion of Jupiter VI endurance trial.
These trials included more than 25,000 miles of sealed running in 225 hours and 54 minutes, followed by a flight from Croydon to Cairo and back in 56 hours flying time to demonstrate the engine’s suitability for operation in hot climates.
In March 1928, it was used for testing the 480 hp geared Jupiter VIII engine, driving a four-blade propeller. On completion of these trials the aircraft remained in storage until it was scrapped in 1931.
Bristol 84 G-EBGG Jup VIII LR tank Mar 28 Bristol Bloodhound G-EBGG with long range tanks as test-bed for the Jupiter VIII in March 1928.



Powerplant One 425 hp Bristol Jupiter IV (normal, variable timing or supercharged)
Span 40 ft 2 in
Maximum Weight 4,236 lb
Capacity & Armament Pilot, observer and two fixed Vickers and one Scarff-mounted Lewis machine gun.
Maximum Speed 130 mph
Endurance 3 hours

Number built

Four aircraft: G-EBGG, J7248, J7236, J7237.


No examples survive.

Other information