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Aviation History
1948
1948 - 0240.PDF
25,000 20,000 2 1S.OOO 10,000 s.ooo CLIMB AFTER ENGINE ON MAXIMUM POWER I I ON MAX CONTINUOUS POWER Span 108ft (32,93 m) Length «8ft 4in (20.80 m, <OO 2OO 3OO 4OO 5OO 6OO TOO 8OO 9OO IOOO MOO RATE Of CLIMB IN FEET PER MINUTE Graph showing rate of climb 3t a weight of 40,000/6. NEW BRISTOL 170 . . . taken for granted on an aircraft of the 170 class were proved to be prohibitively parasitic and received attt-iion accordingly. An unusually elaborate system of instrumentation was installed in G-AIFF, the prototype of the new series, the principal item being an automatic observer consisting of an instrument panel photographed by a modified F.24 camera and enabling simul- taneous reading of all in- struments to be obtained at very frequent intervals. Special credit is given to the torquemeter, which was 30 consistently accurate that small variations in engine power, due to a variety of causes, could be discounted, and the per- formance figures were there- by obtained with complete consistency. Take-off and landing dis- tances were measured with great accuracy by special photographic equipment, painted lines on the fuse- lage of '' FF '' serving as a check on the distance of the aircraft from the camera. As a result of these tests the makers confidently claim a landing distance of 770 yards from a 50ft obstruc- tion, with a ground run of 440 yards to stop. These figures apply to a weight of 40,000 lb and a wind of 5 m.p.h. Under the same conditions Mr. Pegg has repeatedly demon- strated the possibility of landing over a 50ft screen in 716 yards and of bringing the machine to a standstill only 329 yards from the point of touch-down. Backed by this exhaustive testing and by experience with older models in France, Sweden, India, Ecuador, Venezuela, Brazil, the Argentine and South Africa, the Thejanitrol heaters and their ducts are now rearranged as shown. DATA \ WEIGHTS* Structure group 15,0401b (6822 kg) Power group 7,7001b (3493 kg) Supply group 5601b (254 kg) Power services ... ... 5901b (268 kg) Fixed equipment 1,0781b (490 kg) Removable equipment 4021b (182 kg) Crew (three) 5101b (232 kg) Oil ... 3511b (159 kg) Payload plus fuel 13,7691b (6245 kg) All-up weight 40,0001b (18145 kg) PERFORMANCE Max. speed 224 m.p.h. at 6,500ft (357 km/hr at 1980 m) Recommended cruising speed (875 b.h.p. 162 m.p.h. at 5,000ft per engine) (260 km/hr at 1525 m) Service ceiling (at 35,0001b, max. cont. power) 24,850ft (7573 m) Climb to 10,000ft (max. cont. power) ... II min Still-air range with 12,0001b payload ... 380 miles (600 km) „ 10,0001b „ ... 825 miles (1290 km) , 8,0001b „ ... 1,270 miles (2040 kJfc 7.2251b .. ... 1,430 miles (2290 k • Data apply to Mk. XXI all-freight version. All versions are now certified for an all-up weight of 40,0001b. New Type 170 seems assured of a successful future. Its possible uses are far from exhausted. Suggested applica- tions include exploration work; fire fighting and forestry protection; emergency repair shop; fuel tanker; crop- dusting and pest control; medical services (operating theatre, dentistry, etc.); horse and cattle transport; meat transport; exhibition showroom (with accommodation for salesmen and racks for samples); vehicle ferry; photo- graphic survey (with processing facilities); cinematograph film unit; and all phases of military transport. Take-off into 5-m.p.h. wind in I.C.A.N. conditions at sea level (weight, 40,0001b).
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