A.Jackson Avro Aircraft since 1908 (Putnam)
Avro Type 519
Evolved from the Avro 510 seaplane and built for the Admiralty early in 1916, the Avro 519 was a single-seat biplane bomber with folding wings, a scaled-up version of the standard Avro central skid undercarriage and a large fin and rudder of the style used on the Avro 504B.
In addition to the two Avro 519s built for the RNAS a pair of two-seat Avro 519As with stout V-strut undercarriage and having no central skid were ordered for the RFC. All four machines had unique characteristics. The first Type 519, 8440, which spent some time at Eastchurch in 1916, was fitted with side-mounted radiators. Sister machine 8441 and the first of the two 225 hp Sunbeam powered aircraft for the RFC, 1614, were fitted with a large radiator mounted above and behind the engine. This unit not only blocked the pilot’s forward view but would also have introduced high additional drag to a type known for its poor rate of climb. It is thought that it was in an attempt to correct this lack of performance that the second RFC machine, 1615, was completed with equal-span wings approximately 43 ft in length. This machine was a Type 522, a fact confirmed by sign-writing on the side of its fuselage, but despite this it was still officially referred to as a Type 519A.
This last machine, 1615, was despatched to Hamble from Manchester on November 1, 1916, and though ready for military acceptance by December 8, 1916, remained there until April 1917 when it departed along with 1614 and 8441 which were also at Hamble at that time. The fact that company reports talk of ‘managing to get rid’ of these three machines is a measure of their success.
Photographs taken by test pilot Capt F. T. Courtney suggest that all four machines were tested at Farnborough where they were dubbed ‘The Big Avros’. 1614 was there in May 1916. Their ultimate fate is unknown.
SPECIFICATION AND DATA
Manufacturers:
A. V. Roe and Co Ltd, Park Works, Newton Heath, Manchester; and Hamble Aerodrome, near Southampton, Hants.
Powerplants:
One 150 hp Sunbeam Nubian
One 225 hp Sunbeam
Dimensions:
Avro 519 Avro 519A Avro 522
Span (upper) 63 ft 0 in 63 ft 0 in 43 ft 0 in
Span (lower) 38 ft 0 in 38 ft 0 in 43 ft 0 in
Length (150 hp Sunbeam) 32 ft 9 in - -
33 ft 3 in - -
Length (225 hp Sunbeam) 35 ft 1 3/4 in 33 ft 10 in 33 ft 8 in
Height 11 ft 8 in* 11 ft 8 in* -
Wing Area 600 sq ft 600 sq ft -
*measured to the highest point on the upper surface of the wing
Weights:
(Avro 519) All-up weight 3,000 lb
Performance:
(Avro 519) Speed 75 mph Climb 6,000 ft in 30 mins
Production:
(Type 519 for RNAS) 8440 and 8441
(Type 519A for RFC) 1614
(Type 522 for RFC) 1615
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F.Manson British Bomber Since 1914 (Putnam)
Avro Type 519
The Avro Type 519 appears to have been a contemporary of the Grahame-White Type 18 and, like that aeroplane, very little is known about it. By a process of elimination, it seems certain that the Type 519 was intended as a possible bomber, and was evidently an attempt to adapt the Avro Type 510 'Round Britain' racing seaplane of 1914 for military consideration. (Although the 1914 race had been cancelled on the outbreak of war, the Admiralty had purchased the prototype and five further examples.)
The Type 519 retained the earlier aircraft's 150hp Sunbeam Nubian watercooled engine as well as similar two-bay wings of unequal span. The fuselage was generally similar, but was faired to incorporate curved upper decking and raised headrest fairings aft of the cockpits. The wheel-and-skid undercarriage with oleo struts was reminiscent of that on the Avro 504. In order to meet naval storage requirements, provision was made to fold the wings.
The design drawings, prepared by Roy Chadwick and H E Broadsmith, met with interest at the Admiralty and War Office to the extent that Avro received orders for four aircraft - two single-seat Type 519s for the RNAS and two two-seat Type 519As for the RFC; the latter featured fixed wings and a plain V-strut undercarriage without the central skid.
All four aircraft are believed to have been delivered to Farnborough by May 1916 for trials, but it is said that they did not meet the Service strength requirements with the Nubian engine, and their ultimate fate is not known.
Type: Single-engine, single- and two-seat, two-bay biplane (probably intended as experimental bomber).
Manufacturer: A Y Roe & Co Ltd, Miles Platting, Manchester.
Powerplant: One 150hp Sunbeam Nubian eight-cylinder, water-cooled, in-line engine driving two-blade propeller.
Dimensions: Span (Type 510), 63ft 0in.
Performance: Max speed, approx 76 mph at sea level.
Armament: No gun armament; provision for bomb load, unknown.
Prototypes: Four; two Type 519s for Admiralty, Nos 8440 and 8441, and two Type 519As for War Office, Nos 1614 and 1615.
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P.Lewis British Bomber since 1914 (Putnam)
One of the designs of indeterminate purpose but of appearance strongly suggestive of being intended as a bomber was the Avro Type 519 biplane of early 1916. Two prototypes - 1614 and 1615 - were ordered for the R.F.C. and a further pair - 8440 and 8441 - for the R.N.A.S. Unequal-span, two-bay, unstaggered wings were mated to a normal style of fuselage with two cockpits in tandem. Mounted in the nose was the 150 h.p. Sunbeam Nubian, and aft of the cockpits - which were set well back and embedded in the deep curved decking - there was a large curved fin. The pilot’s view was not assisted by the bulky radiator installed above and to the rear of the Nubian. 8441 appeared as a folding-wing single-seater flown from the rear cockpit, that at the front being faired over, and a typical Avro-style single skid was incorporated in the undercarriage. The Type 519 was singularly undistinguished in appearance, and no progress was made with the design beyond the prototype stage.
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M.Goodall, A.Tagg British Aircraft before the Great War (Schiffer)
Deleted by request of (c)Schiffer Publishing
Avro 519
Built for the Admiralty early in 1916, the Avro 519 single seat biplane bore a distinct resemblance to the Avro 510 seaplane of two years previously. Few technical details of the Avro 519 survive but it appears to have been fitted with the same wing structure as the 510, redesigned for folding and rigged with decreased gap. An enlarged version of the standard central skid undercarriage replaced the floats and the neat nose radiator was abandoned in favour of an ugly, high drag unit above and behind the engine which blocked the pilot's forward view. A large fin and rudder of the type used on the Avro 504B was also fitted.
The exact purpose of the aircraft is not known but pilot-comfort was evidently of some importance for the flat top of the Avro 510 fuselage gave place to a deep and generous decking. An elongated secondary structure on top of this formed a streamlined headrest.
Four prototypes were built, comprising two Avro 519s for the R.N.A.S. and two Avro 519A two seaters for the R.F.C. The latter were fitted with a stout Vee strut undercarriage with no skid, and photographs taken by test pilot Capt. F. T. Courtney suggest that all four were delivered to Farnborough for tests during or before May 1916. It is said that neither the R.N.A.S. nor the R.F.C. considered them strong enough for the powerful 150 h.p. engine, and apart from the fact that they were dubbed "The Big Avros" and that their rate of climb was poor, no hint of their career or ultimate fate remains.
SPECIFICATION AND DATA
Manufacturers: A. V. Roe and Co. Ltd., Clifton Street, Miles Platting, Manchester
Power Plant: One 150 h.p. Sunbeam Nubian
Production:
(For R.N.A.S.) 8440 and 8441
(For R.F.C.) 1614 and 1615
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J.Bruce British Aeroplanes 1914-1918 (Putnam)
Avro 519
THE Avro 519 was a large and rather clumsy biplane which appeared to have the same wing structure as the Avro 510 seaplane. As on the Type 510, the 150 h.p. Sunbeam Nubian engine was fitted, but whereas the seaplane had a frontal radiator the Type 519 had a box-like radiator above and behind the engine.
The structure of the Avro 519 appeared to be quite conventional. The fuselage was characterised by an unusually deep top-decking, in addition to which the cockpits had peculiar windshield and head-rest fairings fitted fore and aft. A plain, sturdy vee undercarriage was used.
The tail unit incorporated a large fin of the shape associated with Avros built for the R.N.A.S. Prototypes were supplied to both the R.N.A.S. and R.F.C., however: four were ordered, the first two (8440 and 8441) going to the R.N.A.S., the second pair (1614 and 1615) to the R.F.C. The illustrations show No. 1614, which in May, 1916, was at Farnborough for tests. There it was known as “The Big Avro".
The aircraft’s designed purpose is uncertain, but it had the appearance of being intended for use as a bomber. Performance could not have been good on only 150 h.p., however, and the deep cockpit coamings would have made it difficult to use defensive armament effectively. The fate of the prototypes is not known, but the Type 519 was not developed.
SPECIFICATION
Manufacturers: A. V. Roe & Co., Ltd., Clifton Street, Miles Platting, Manchester.
Power: 150 h.p. Sunbeam Nubian.
Serial Numbers: 1614-1615; 8440-8441.
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O.Thetford British Naval Aircraft since 1912 (Putnam)
AVRO 519
Two only (Nos.8440 and 8441) supplied to the RNAS in 1916. So far as is known, the type saw no operational service. Originally built as a two-seater, a single-seat version (No.8441) is illustrated: it had folding wings. One 150 hp Sunbeam Nubian engine.
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