when you writen this book ?
I proposed its publication to Fonthill in January, but all production has been delayed a few months and now I am negotiating the delivery date, maybe it will be available for Christmaswhen you writen this book ?
Those drawings represent the Hawker Fury I prototype not the Tempest III. But that was not how the II & IV were initially envisaged.
To meet the Specification F.6/42, in February 1942 were ordered six prototypes (LA602 to LA607) of the Tempest Mk.II variant, powered by one Bristol Centaurus IV, sleeve-valve radial engine.Those drawings represent the Hawker Fury I prototype not the Tempest III. But that was not how the II & IV were initially envisaged.
As proposed by in April 1942 under the Hawker designation P.1016 they were to be powered as follows:-
Tempest III - Griffon IIB (1,720hp two speed, single stage supercharger as used in the Fairey Firefly I) with length 34'3" weight 10,400lb. Estimated to do 370mph at 9,000ft and 400mph at 22,000ft. Time to 30,000ft 17.7 min, ceiling 31,500 ft. Two prototypes planned - LA610 & LA614. Former flew in 1944 as the Hawker Fury prototype (see below) while LA614 was cancelled in Feb 1943.
Tempest IV - Griffon 61 (1,540hp two speed, two stage supercharger as used in Spitfire XIV) weight 10,700lb. Estimated speed 419mph at 19,500ft and 430mph at 31,500ft. Time to 30,000ft 13.6min. Ceiling 40,000ft. No prototypes.
Given the extra supercharger stage of the Griffon 61, the Mk.IV must have been longer (think Spitfire XII v XIV). Obviously Camm preferred the latter engine as did the Air Ministry but it was eventually decided that it was not required.
LA610 eventually flew on 27 Nov 1944 as the Griffon 85 powered Hawker F.2/43 Fury I prototype (the Tempest Light Fighter) The Griffon 85 was a Griffon 65 (itself a very slightly modified Griffon 61) with Rotol 6 blade counter rotating props. So your drawings appear to me to be of LA610 in that form and not as a proposed Tempest III or even IV.
Ref "Tempest, Hawker's Outstanding Piston Engined Fighter" by Tony Butler & "British Piston Aero Engines and Their Aircraft" by Alec Lumsden.
Hi Justo,
"Republic P-47 Thunderbolt evolution" Will you be covering both the XP-47J and the superlative XP-72?
"Supermarine Spitfire dead ends" Will you be covering the Supermarine Spiteful?
I would definitely buy your book.
Thanks
Sorry but your post has a problem.To meet the Specification F.6/42, in February 1942 were ordered six prototypes (LA602 to LA607) of the Tempest Mk.II variant, powered by one Bristol Centaurus IV, sleeve-valve radial engine.Those drawings represent the Hawker Fury I prototype not the Tempest III. But that was not how the II & IV were initially envisaged.
As proposed by in April 1942 under the Hawker designation P.1016 they were to be powered as follows:-
Tempest III - Griffon IIB (1,720hp two speed, single stage supercharger as used in the Fairey Firefly I) with length 34'3" weight 10,400lb. Estimated to do 370mph at 9,000ft and 400mph at 22,000ft. Time to 30,000ft 17.7 min, ceiling 31,500 ft. Two prototypes planned - LA610 & LA614. Former flew in 1944 as the Hawker Fury prototype (see below) while LA614 was cancelled in Feb 1943.
Tempest IV - Griffon 61 (1,540hp two speed, two stage supercharger as used in Spitfire XIV) weight 10,700lb. Estimated speed 419mph at 19,500ft and 430mph at 31,500ft. Time to 30,000ft 13.6min. Ceiling 40,000ft. No prototypes.
Given the extra supercharger stage of the Griffon 61, the Mk.IV must have been longer (think Spitfire XII v XIV). Obviously Camm preferred the latter engine as did the Air Ministry but it was eventually decided that it was not required.
LA610 eventually flew on 27 Nov 1944 as the Griffon 85 powered Hawker F.2/43 Fury I prototype (the Tempest Light Fighter) The Griffon 85 was a Griffon 65 (itself a very slightly modified Griffon 61) with Rotol 6 blade counter rotating props. So your drawings appear to me to be of LA610 in that form and not as a proposed Tempest III or even IV.
Ref "Tempest, Hawker's Outstanding Piston Engined Fighter" by Tony Butler & "British Piston Aero Engines and Their Aircraft" by Alec Lumsden.
The LA602 was flown on 28 June 1943, with Typhoon tail surfaces, reaching a top speed of 461 mph. at 21,000 ft. but their development was delayed because engine vibration problems. The Mk.II didn't get into combat during the Second World War.
On 10 April 1942 Hawker proposed two light versions of the Tempest powered by Rolls-Royce Griffon engines, as a replacement for the Hurricane.
The prototype LA610, designated Tempest Mk.III, was flown on 27 November 1944 powered by one Griffon IIB.
The prototype LA614, designated Tempest Mk.IV with Griffon 61, was never built.
Napier spent a great deal of time experimenting with annular radiators in an effort to supersede the chin radiators of the Typhoon and Tempest.
In 1943 the Typhoon R8694 was fitted with one annular radiator which encircled the engine reduction gear and one propeller driven fan inside the air intake.
With the drag reduction obtained the prototype attained 452 mph. became the faster Typhoon of all.
Early 1946 the Tempest Mk.V (EJ518) was fitted with one 2,240 hp Sabre VI engine, with annular radiator and sliding ring cowl. Flight tests revealed a drag of 57.8 lb (against the 63.4 lb of the standard Tempest) with an improvement in the top speed of 14 m.p.h.
A second prototype (NV768) was flight tested in July 1946 with annular radiator installation and Sabre IIB engine.
In September the aircraft was fitted with one ducted spinner with the air intake ahead of the propeller blades.
In March 1943 was issued Specification F.2/43 calling for a lighter version of the Tempest, under the denomination Fury.
Hawker proposed three projects: P.1018 with Sabre VII engine, P.1019 with Griffon 61 and P.1020 with Centaurus XII.
The first prototype (NX798) was flown on 1 September 1944 powered by the Centaurus engine driving a four-bladed Rotol airscrew. The aircraft demonstrated remarkable manoeuvrability and good handling, was selected by the Admiralty for production of the Sea Fury naval fighter, under the Specification N.7/43.
The second prototype (LA610), ex-Tempest Mk.III, was flown on 27 November 1944 with the wing centre section removed, the wingspan shortened by 29 inches, new tail surfaces and raised cockpit.
The aircraft was powered by one Griffon 85 driving a six-bladed contra-rotating airscrew, but their new ‘horse collar’ radiator proving far less satisfactory than the wing root radiators.
The LA610 was re-engined with a Sabre VII reaching 483 mph. on 3 April 1946. It was the fastest piston-powered Hawker fighter, but the RAF was not interested and the Fury production was cancelled in favour of the Vampire and Meteor jet fighters.
Fury LA610 technical data
Power plant: One Rolls-Royce Griffon 85, twelve cylinder ‘V’, liquid cooled engine, rated at 2,340 hp, driving a six-bladed contra-rotating airscrew, or one Napier Sabre VII, twenty-four cylinder ‘H’, liquid-cooled engine rated at 3,055 hp, wingspan: 38.6 ft (11.77 m), length: 34.6 ft (10.54 m), height: 14.6 ft (4.5 m), wing surface: 284.5 sq. ft (25.6 sq. m), maximum weight: 12,120 lbs (4,236 kg), maximum speed: 483 m.p.h. (777 kph), climb rate: 4,706 ft/min, ceiling: 41,500 ft (12,652 m), armament: four wing-mounted 20 mm Hispano Mk.V cannons.
You're right, the first date is wrong. The Tempest III never flew in its initial configuration, there is only a drawing from April 10, 1942 of the P.1016 that represents a MkV with altered nose and Griffon 61 (Public Record Office-AVIA 15/1667). Thanks for sharing.Sorry but your post has a problem.To meet the Specification F.6/42, in February 1942 were ordered six prototypes (LA602 to LA607) of the Tempest Mk.II variant, powered by one Bristol Centaurus IV, sleeve-valve radial engine.Those drawings represent the Hawker Fury I prototype not the Tempest III. But that was not how the II & IV were initially envisaged.
As proposed by in April 1942 under the Hawker designation P.1016 they were to be powered as follows:-
Tempest III - Griffon IIB (1,720hp two speed, single stage supercharger as used in the Fairey Firefly I) with length 34'3" weight 10,400lb. Estimated to do 370mph at 9,000ft and 400mph at 22,000ft. Time to 30,000ft 17.7 min, ceiling 31,500 ft. Two prototypes planned - LA610 & LA614. Former flew in 1944 as the Hawker Fury prototype (see below) while LA614 was cancelled in Feb 1943.
Tempest IV - Griffon 61 (1,540hp two speed, two stage supercharger as used in Spitfire XIV) weight 10,700lb. Estimated speed 419mph at 19,500ft and 430mph at 31,500ft. Time to 30,000ft 13.6min. Ceiling 40,000ft. No prototypes.
Given the extra supercharger stage of the Griffon 61, the Mk.IV must have been longer (think Spitfire XII v XIV). Obviously Camm preferred the latter engine as did the Air Ministry but it was eventually decided that it was not required.
LA610 eventually flew on 27 Nov 1944 as the Griffon 85 powered Hawker F.2/43 Fury I prototype (the Tempest Light Fighter) The Griffon 85 was a Griffon 65 (itself a very slightly modified Griffon 61) with Rotol 6 blade counter rotating props. So your drawings appear to me to be of LA610 in that form and not as a proposed Tempest III or even IV.
Ref "Tempest, Hawker's Outstanding Piston Engined Fighter" by Tony Butler & "British Piston Aero Engines and Their Aircraft" by Alec Lumsden.
The LA602 was flown on 28 June 1943, with Typhoon tail surfaces, reaching a top speed of 461 mph. at 21,000 ft. but their development was delayed because engine vibration problems. The Mk.II didn't get into combat during the Second World War.
On 10 April 1942 Hawker proposed two light versions of the Tempest powered by Rolls-Royce Griffon engines, as a replacement for the Hurricane.
The prototype LA610, designated Tempest Mk.III, was flown on 27 November 1944 powered by one Griffon IIB.
The prototype LA614, designated Tempest Mk.IV with Griffon 61, was never built.
Napier spent a great deal of time experimenting with annular radiators in an effort to supersede the chin radiators of the Typhoon and Tempest.
In 1943 the Typhoon R8694 was fitted with one annular radiator which encircled the engine reduction gear and one propeller driven fan inside the air intake.
With the drag reduction obtained the prototype attained 452 mph. became the faster Typhoon of all.
Early 1946 the Tempest Mk.V (EJ518) was fitted with one 2,240 hp Sabre VI engine, with annular radiator and sliding ring cowl. Flight tests revealed a drag of 57.8 lb (against the 63.4 lb of the standard Tempest) with an improvement in the top speed of 14 m.p.h.
A second prototype (NV768) was flight tested in July 1946 with annular radiator installation and Sabre IIB engine.
In September the aircraft was fitted with one ducted spinner with the air intake ahead of the propeller blades.
In March 1943 was issued Specification F.2/43 calling for a lighter version of the Tempest, under the denomination Fury.
Hawker proposed three projects: P.1018 with Sabre VII engine, P.1019 with Griffon 61 and P.1020 with Centaurus XII.
The first prototype (NX798) was flown on 1 September 1944 powered by the Centaurus engine driving a four-bladed Rotol airscrew. The aircraft demonstrated remarkable manoeuvrability and good handling, was selected by the Admiralty for production of the Sea Fury naval fighter, under the Specification N.7/43.
The second prototype (LA610), ex-Tempest Mk.III, was flown on 27 November 1944 with the wing centre section removed, the wingspan shortened by 29 inches, new tail surfaces and raised cockpit.
The aircraft was powered by one Griffon 85 driving a six-bladed contra-rotating airscrew, but their new ‘horse collar’ radiator proving far less satisfactory than the wing root radiators.
The LA610 was re-engined with a Sabre VII reaching 483 mph. on 3 April 1946. It was the fastest piston-powered Hawker fighter, but the RAF was not interested and the Fury production was cancelled in favour of the Vampire and Meteor jet fighters.
Fury LA610 technical data
Power plant: One Rolls-Royce Griffon 85, twelve cylinder ‘V’, liquid cooled engine, rated at 2,340 hp, driving a six-bladed contra-rotating airscrew, or one Napier Sabre VII, twenty-four cylinder ‘H’, liquid-cooled engine rated at 3,055 hp, wingspan: 38.6 ft (11.77 m), length: 34.6 ft (10.54 m), height: 14.6 ft (4.5 m), wing surface: 284.5 sq. ft (25.6 sq. m), maximum weight: 12,120 lbs (4,236 kg), maximum speed: 483 m.p.h. (777 kph), climb rate: 4,706 ft/min, ceiling: 41,500 ft (12,652 m), armament: four wing-mounted 20 mm Hispano Mk.V cannons.
Para 4 you have LA610 flying on 27 Nov 1944 with a Griffon IIB as a prototype Tempest III.
Then in para 15 you have LA610 flying on 27 Nov 1944 with a Griffon 85 as a prototype Fury I.
It simply cannot be both. AIUI the Griffon IIB option was rejected at the outset as its performance was lacking.