H.King Armament of British Aircraft (Putnam)
Type 4. There were three versions of this successor to the Type 3, the first of which was a patrol seaplane. No armament appears to have been installed.
Jane's All The World Aircraft 1919
The Sage No. 4a was designed for sea patrol work in June 1917. It is similar to most float seaplanes and is fitted with a 150 h.p. Hispano-Suiza engine which gave the machine a considerably superior performance to any seaplane or flying boat of its power at the time. The No. 4b and No. 4c were similar to the No. 4a, but were fitted with dual control and 200 h.p. Hispano-Suiza and Sunbeam " Arab " engines. The No. 4c had staggered planes and folding gear, whilst the 46 had fixed wings of slightly smaller area and a faster wing section. Both types could be rolled, spun, looped, &c., and have been used for advanced training for seaplane pilots.
Specification.
Type of machine Seaplane.
Name or type No. of machine Sage 4a.
Purpose for which intended Patrol.
Span 84 ft 6 in.
Gap, maximum and minimum 5 ft.
Overall length 26 ft. 8 in.
Maximum height 11 ft. 3 in.
Chord 4 ft. 9 in.
Total surface of wings 330 sq. ft.
Span of tail 11 ft. 4 in.
Total area of tail 26 sq. ft.
Area of elevators 24 sq. ft.
Area of rudder 9 sq. ft.
Area of fin 7 sq. ft.
Area of each aileron 18 sq. ft.
Total area of ailerons 72 sq. ft.
Maximum cross section of body 2 ft. 6 In. x 2 ft. 5 In.
Horizontal area of body 59 sq. ft.
Vertical area of body 78 sq. ft.
Engine type and h.p. 150 h.p. Hispano.
Airscrew diameter and pitch 9 ft. d. x 7 ft. 3 In. p.
Airscrew revs. 1500 r.p.m.
Weight of machine empty 1620 lbs.
Load per sq. ft. 8.0 lbs.
Weight per h.p. 17.6 lbs.
Tank capacity in hours 4 hours.
Tank capacity in gallons 50 gallons.
Performance.
Speed low down 93 1/2 m.p.h.
Speed at 10.000 feet 81 m.p.h.
Landing speed 50 m.p.h.
Climb.
To 5.000 feet 12 minutes.
To 10,000 feet 25 minutes.
Disposable load apart from fuel 291 lbs.
Total weight of machine loaded 2645 lbs.
Ceiling 13,000ft.
SAGE 4B.
SAGE 4C.
Specification.
Type of machine Seaplane.
Name or type No. of machine Sage Seaplane.
Purpose for which intended Training.
Span 39 ft. 7 1/4 In.
Gap, maximum and minimum 5 ft. 3 in.
Overall length 37 ft. 6 In.
Maximum height 11 ft. 7 In.
Chord 5 ft. 3 In.
Total surface of wings 386 sq. ft.
Span of tail 11 ft.
Total area of tail 24 sq. ft.
Area of elevators 21 sq. ft.
Area of rudder 9 sq. ft.
Area of fin 7 sq. ft.
Area of each aileron 21 sq. ft.
Total area of ailerons 84 sq. ft.
Maximum cross section of body 2 ft. 6 in. x 2 ft. 5 In.
Horizontal area of body 56 sq. ft.
Vertical area of body 70 sq. ft.
Engine type and h.p. (4. A.) 200 h.p. Hispano-Suiza;
(4. B.) 200 h.p. "Arab" Sunbeam.
Airscrew diameter and pitch 9 ft. d. x 7 ft. 9 n. p.
Airscrew revs. 1500 r.p.m.
Weight of machine empty 2100 lbs.
Load per sq. ft. 7.45 lbs.
Weight per h.p. 14.4 lbs.
Tank capacity in hours 2 1/2 hours.
Tank capacity In gallons 35 gallons.
Performance.
Speed low down 97 m.p.h.
Speed at 10,000 feet 94 m.p.h.
Landing speed 45 m.p.h.
Climb.
To 5,000 feet 8 minutes.
To 10,000 feet 21 minutes.
Disposable load apart from fuel 155 lbs.
Total weight of machine loaded 2875 lbs.
Ceiling 15,800 ft.
Журнал Flight
Flight, July 24, 1919.
"MILESTONES"
THE SAGE MACHINES
The Sage Seaplanes (1917)
Following on Sage 3 came a seaplane, which was produced in July, 1917. This machine was designed for wireless work with the Fleet. In general lines it was very similar to Sage 3, but it was fitted with a 140 h.p. Hispano-Suiza engine instead of the 75 h.p. Rolls-Royce Hawk. Also it had single control, in the front cockpit, leaving the rear cockpit clear for the wireless installation and operator. The floor under the rear cockpit was made to slide out of the way so that the wireless operator could look straight down. As in the Type 3 a very good view was obtained from both cockpits, and the type was recommended for training purposes. This entailed the fitting of dual controls, while also the nose of the fuselage had to be modified to take either a Hispano-Suiza of a Sunbeam Arab engine. Consequently by the time this had been done the machine was a good deal different from the original, and it was given a different series number. While the original experimental machine was known as the Sage 4A, subsequent models were called 4B and 4c respectively. The latter two models were very similar in appearance, but whereas the 4B type had rigidly fixed wings, the 4c type was provided with folding wings. The increase in power, of from 140 h.p. to 200 h.p., naturally improved the performance, in spite of the additional weight of the engine and dual controls. The last machine turned out before the Armistice had a speed range of from 45 m.p.h. to 97 m.p.h., and climbed 10,000 ft. in 21 minutes.
The chief feature of all the Type 4 machines is the ease with which they can be stunted, and at the same time they are very stable, the pilot on one occasion leaving the machine to itself at 400 ft. and flying for a distance of about 50 miles.