The Gribovsky G-21 (Russian: ГРИБОВСКИЙ Г-21) was a single engine cabin monoplane designed and built in the USSR in the mid-1930s. Intended for touring and civil utility rôles, only one was completed.
The G-21 had much in common with that of the earlier G-15, a two-seat touring aircraft, with a two spar wing of similar construction and geometry and a monocoque fuselage. The G-15's side-by-sidecockpit was replaced with an enclosed cabin able to seat two or three. Suggested rôles included that of air ambulance.[1]
Like the G-15 it had a completely plywood covered wing centre section which was an integral part of the fuselage. The outer wing panels were ply covered from the leading edge back to the rear spar, with the rest fabric covered. In plan the wings were strongly tapered, mostly on the trailing edges, and ended in long, elliptical tips. Its automatic leading edge slats were interconnected through the fuselage with a steel tube and its ailerons were slotted.[1]
The G-21 was powered by a five-cylinder 112 kW (150 hp) M-11Yeradial engine,[1][2] installed with its cylinders projecting out of the smooth cowling for cooling and driving a two blade propeller. Behind the engine the fuselage was smoothly ply covered. The front of the cabin was over the leading edge, with panelled glazing that extended aft to about three-quarters chord. The G-21's cabin roof line extended rearwards unbroken, tapering only slightly to the tail, where a forward set, mid-fuselage mounted tailplane was braced on each side by a single strut to the fin-fuselage junction. The fin and unbalanced rudder had a curved profile; the rudder was broad and extended down to the keel.[1]
The G-21 had a tail skid undercarriage; like the G-15, its legs were attached to the end of the wing centre section with wheels mostly enclosed in large round profile spats. The tail skid was also faired.[1]
It made its first flight in 1936. Equipped with extra fuel tanks, it made several notable long distance flights.[1]
^ abcdefgGunston, Bill (1995). The Osprey Encyclopedia of Russian Aircraft 1875–1995. London: Osprey (Reed Consumer Books Ltd). p. 79. ISBN1 85532 405 9.
^ abGunston (1995). The Osprey Encyclopedia of Russian Aircraft 1875–1995. pp. XX–XXI.
January 01, 1970
gribovsky, russian, ГРИБОВСКИЙ, single, engine, cabin, monoplane, designed, built, ussr, 1930s, intended, touring, civil, utility, rôles, only, completed, role, three, seat, cabin, monoplane, national, origin, ussr, designer, vladislav, gribovsky, first, fligh. The Gribovsky G 21 Russian GRIBOVSKIJ G 21 was a single engine cabin monoplane designed and built in the USSR in the mid 1930s Intended for touring and civil utility roles only one was completed Gribovsky G 21 Role Two three seat cabin monoplane National origin USSR Designer Vladislav Gribovsky First flight 1936 Number built 1Design and development editThe G 21 had much in common with that of the earlier G 15 a two seat touring aircraft with a two spar wing of similar construction and geometry and a monocoque fuselage The G 15 s side by side cockpit was replaced with an enclosed cabin able to seat two or three Suggested roles included that of air ambulance 1 Like the G 15 it had a completely plywood covered wing centre section which was an integral part of the fuselage The outer wing panels were ply covered from the leading edge back to the rear spar with the rest fabric covered In plan the wings were strongly tapered mostly on the trailing edges and ended in long elliptical tips Its automatic leading edge slats were interconnected through the fuselage with a steel tube and its ailerons were slotted 1 The G 21 was powered by a five cylinder 112 kW 150 hp M 11Ye radial engine 1 2 installed with its cylinders projecting out of the smooth cowling for cooling and driving a two blade propeller Behind the engine the fuselage was smoothly ply covered The front of the cabin was over the leading edge with panelled glazing that extended aft to about three quarters chord The G 21 s cabin roof line extended rearwards unbroken tapering only slightly to the tail where a forward set mid fuselage mounted tailplane was braced on each side by a single strut to the fin fuselage junction The fin and unbalanced rudder had a curved profile the rudder was broad and extended down to the keel 1 The G 21 had a tail skid undercarriage like the G 15 its legs were attached to the end of the wing centre section with wheels mostly enclosed in large round profile spats The tail skid was also faired 1 It made its first flight in 1936 Equipped with extra fuel tanks it made several notable long distance flights 1 Specifications editData from Gunston 1995 p 79 1 General characteristicsCapacity Two three Length 7 0 m 23 ft 0 in Wingspan 11 0 m 36 ft 1 in Wing area 14 0 m2 151 sq ft Empty weight 705 kg 1 554 lb Gross weight 980 kg 2 161 lb Fuel capacity 105 kg 231 lb standard tanks Powerplant 1 M 11Ye 5 cylinder radial 110 kW 150 hp 2 Propellers 2 bladed Performance Maximum speed 220 km h 140 mph 120 kn Range 500 km 310 mi 270 nmi Service ceiling 4 760 m 15 620 ft Time to altitude 5 6 min to 1 000 m 3 280 ft Landing speed 70 km h 43 mph References edit a b c d e f g Gunston Bill 1995 The Osprey Encyclopedia of Russian Aircraft 1875 1995 London Osprey Reed Consumer Books Ltd p 79 ISBN 1 85532 405 9 a b Gunston 1995 The Osprey Encyclopedia of Russian Aircraft 1875 1995 pp XX XXI Retrieved from https en wikipedia org w index php title Gribovsky G 21 amp oldid 896081478, wikipedia, wiki, book, books, library,
