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The Avro Commodore

The Avro Commodore 242 AIRCRAFT ENGINEERING September, 1934 A Four-Seater Enclosed Biplane with a Single 215 h.p . Lynx Engine H E Avro Commodore is a four- controls arc duplicated, one set being provided on either side of the two piloting scats. The (" occasional " five-) scater biplane finish and decoration of the cabin is tastefully fitted with the Armstrong-Siddeley Lyn x 215 h.p. engine. carried out in best quality materials. The scats are leather covered, the walls are similarly The main planes are heavily staggered and trimmed up to the waist line, and the roof is are entirely of metal construction with the lined with suitable upholstery cloth. A re­ exception of the linen covering and the wooden tan k fairings. The spars are of steel and the movable carpet is laid on the floor. ribs of aluminium. The ailerons are of the The power unit is the Siddeley " Lynx " " Frisc " and mass-balanced type and are engine, developing 215 h.p. at 1,900 r.p.m, fitted to the bottom planes only. The inter- mounted on a steel tube engine mounting plane bracing consists of one set of " N " welded to the fuselage frame proper. A fire­ strut s on either side of the fuselage and a single proof .bulkhead separates the engine from the cross strut in compression in normal flight. cabin and the rest of the fuselage. The whole All the interplane bracing is of streamline steel tubing . PRINCIPA L CHARACTERISTICS Fuselage Span (both planes) 37 ft. 4 in. Height overall 10 ft. 0 in. The fuselage is built up entirely of round sec­ Length overall 27 ft. 3 in. tion steel tubing and all joints are welded. This Chord 4 ft. 9 in. Gap 5 ft. 3 in. method of construction has many advantages. Main plane area (with ailerons) .. 307.0 sq. ft. I t is rigid, of high shock absorbing capacity and Aileron area .. .. .. .. .. .. 31.5 sq.ft. Tail plane area (with elevators) .. .. .. 39-6 sq. ft. is particularly easy and cheap to repair. A Rudder area 12-0 sq.ft. good streamline shape is given to the fuselage Fin area .. .. .. .. .. .. .. 3'3 sq. ft. Dihedral angle 2.5 deg. frame by means of wooden fairings and the Angle of incidence 3.25 deg. covering is of doped linen. A large variety of. Tare weight 2,225 lb. Useful load: attractiv e colour schemes is available. The Pilot 1601b. whole of the forward part of the fuselage, aft of Three passengers a t 160 lb. each .. .. 4801b. Baggage, etc 209 lb. the fireproof bulkhead to a point a little aft of Fuel (49 gallons) 377 lb. the wings, constitutes the cabin, the dimensions Oil (5 gallons) 49 lb. of which are 6 ft. 6 in. by 3 ft. 6 in. b y 4 ft. 6 in., 1,275 lb. Gross weight .: 3,500 lb. tota l cubic capacity 104 cubic feet. Windows Horse-power (at 1,900 r.p.m.) 215 h.p. of Triplex glass arc fitted along both sides of Wing loading 10-82 Ib./sq. ft. Engine loading 15.45 lb./h.p . the cabin and the windscreen is likewise of Maximum speed at sea level .. .. .. 130 m.p.h. Triplex glass. The two windows on either side „ „ at 5,000 feet 124 m.p.h. „ at 20,000 feet .. .. 115 m.p.h. of the two front seats are arranged to open by Landing speed 50 m.p.h. sliding downwards. The door is situated on the Cruising speed at 1,000 feet 110 m.p.h. Range at cruising speed 4.5 hours port side of the machine and the window is Rate of climb at sea level 700 ft./min. arranged to open. On the opposite side of the Time to 1,000 feet 1.60 minutes „ 5,000 feet 9.50 minutes cabin the corresponding window can be opened Undercarriage ,, 10,000 feet 8.00 minutes also. The two front seats are of the bucket Service ceiling 11,500 feet The undercarriage is of particularly clean typ e similar to those fitted in a car. They arc design, and is of the single strut type recently placed side by side and arc individually and evolved by the Avro Company. It is of the of the engine is cowled with a long type aerofoil instantly adjustable. The rear seat is in one Olco type with steel springs in compression to ring fairing of the very latest design. The outer piece, again following normal car practice, and tak e the taxying loads. Dunlop medium portion of the ring, however, is easily removable consists of a deep and fully sprung squab and pressure air wheels are fitted with Bendix brakes in order to provide ready access to the cylinder cushion. Armrests are provided at either side which can be applied on both wheels simul­ heads and valve rocker gear. Petrol is fed to and there are concealed ashtrays. Underneath taneously or on either wheel individually for the engine by gravity from two welded alu­ this scat is a luggage locker. In the roof of the handling on the ground. Streamline casings or minium tanks, one in each top wing, of 50 gal­ cabin there is a window with a sun blind and "spats " are fitted to the wheels and in fact a lons capacity each. The oil tan k is of the same also an emergency exit. The instrument board high degree of streamlining has been achieved construction and is situated in front of the fire­ extends the whole width of the cabin and is in the whole of the undercarriage structure. proof bulkhead. Its capacity is 6 gallons plus placed at a convenient angle. A valance' A tail wheel with Dunlop tyre is fitted. This air space. A Siddeley electric starter, operated hangs from the bottom of the instrument board tail wheel is provided with a shock absorber from an accumulator charged by an engine to the cabin floor and this is cut away in front and can swivel freely. A centralising spring driven generator, can be fitted at extra cost if of the two seats for the rudder pedals. The device is, however, fitted. required. A wooden airscrew is fitted, but a central control column carries " Throw-over " metal one can be supplied at extra cost if The tail is constructed entirely of steel spectacle type hand grips. Throttle and brake desired. tubing and is covered with linen fabric. The rudder is mass balanced but the elevators are unbalanced. The tail plane incidence can be altered during flight by means of a handle in the cabin which operates a screw jack at the tail. For the aileron controls in the bottom main plane, tic rods are used in the straight lengths to keep stretch down to a minimum. At the wing tips, where the run of the control changes direction to connect with the aileron levers, heavy weight cables are used which pass round large diameter pulleys, mounted on ball bearings. The elevator control is of the positive typ e and consists of a duralumin tube. The rudder is operated through an auxiliary bar under the cabin floor connected to the pedals by tic rods. From this bar twin flexible steel cables run to the rudder. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

The Avro Commodore

Aircraft Engineering and Aerospace Technology , Volume 6 (9): 1 – Sep 1, 1934

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb029844
Publisher site
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Abstract

242 AIRCRAFT ENGINEERING September, 1934 A Four-Seater Enclosed Biplane with a Single 215 h.p . Lynx Engine H E Avro Commodore is a four- controls arc duplicated, one set being provided on either side of the two piloting scats. The (" occasional " five-) scater biplane finish and decoration of the cabin is tastefully fitted with the Armstrong-Siddeley Lyn x 215 h.p. engine. carried out in best quality materials. The scats are leather covered, the walls are similarly The main planes are heavily staggered and trimmed up to the waist line, and the roof is are entirely of metal construction with the lined with suitable upholstery cloth. A re­ exception of the linen covering and the wooden tan k fairings. The spars are of steel and the movable carpet is laid on the floor. ribs of aluminium. The ailerons are of the The power unit is the Siddeley " Lynx " " Frisc " and mass-balanced type and are engine, developing 215 h.p. at 1,900 r.p.m, fitted to the bottom planes only. The inter- mounted on a steel tube engine mounting plane bracing consists of one set of " N " welded to the fuselage frame proper. A fire­ strut s on either side of the fuselage and a single proof .bulkhead separates the engine from the cross strut in compression in normal flight. cabin and the rest of the fuselage. The whole All the interplane bracing is of streamline steel tubing . PRINCIPA L CHARACTERISTICS Fuselage Span (both planes) 37 ft. 4 in. Height overall 10 ft. 0 in. The fuselage is built up entirely of round sec­ Length overall 27 ft. 3 in. tion steel tubing and all joints are welded. This Chord 4 ft. 9 in. Gap 5 ft. 3 in. method of construction has many advantages. Main plane area (with ailerons) .. 307.0 sq. ft. I t is rigid, of high shock absorbing capacity and Aileron area .. .. .. .. .. .. 31.5 sq.ft. Tail plane area (with elevators) .. .. .. 39-6 sq. ft. is particularly easy and cheap to repair. A Rudder area 12-0 sq.ft. good streamline shape is given to the fuselage Fin area .. .. .. .. .. .. .. 3'3 sq. ft. Dihedral angle 2.5 deg. frame by means of wooden fairings and the Angle of incidence 3.25 deg. covering is of doped linen. A large variety of. Tare weight 2,225 lb. Useful load: attractiv e colour schemes is available. The Pilot 1601b. whole of the forward part of the fuselage, aft of Three passengers a t 160 lb. each .. .. 4801b. Baggage, etc 209 lb. the fireproof bulkhead to a point a little aft of Fuel (49 gallons) 377 lb. the wings, constitutes the cabin, the dimensions Oil (5 gallons) 49 lb. of which are 6 ft. 6 in. by 3 ft. 6 in. b y 4 ft. 6 in., 1,275 lb. Gross weight .: 3,500 lb. tota l cubic capacity 104 cubic feet. Windows Horse-power (at 1,900 r.p.m.) 215 h.p. of Triplex glass arc fitted along both sides of Wing loading 10-82 Ib./sq. ft. Engine loading 15.45 lb./h.p . the cabin and the windscreen is likewise of Maximum speed at sea level .. .. .. 130 m.p.h. Triplex glass. The two windows on either side „ „ at 5,000 feet 124 m.p.h. „ at 20,000 feet .. .. 115 m.p.h. of the two front seats are arranged to open by Landing speed 50 m.p.h. sliding downwards. The door is situated on the Cruising speed at 1,000 feet 110 m.p.h. Range at cruising speed 4.5 hours port side of the machine and the window is Rate of climb at sea level 700 ft./min. arranged to open. On the opposite side of the Time to 1,000 feet 1.60 minutes „ 5,000 feet 9.50 minutes cabin the corresponding window can be opened Undercarriage ,, 10,000 feet 8.00 minutes also. The two front seats are of the bucket Service ceiling 11,500 feet The undercarriage is of particularly clean typ e similar to those fitted in a car. They arc design, and is of the single strut type recently placed side by side and arc individually and evolved by the Avro Company. It is of the of the engine is cowled with a long type aerofoil instantly adjustable. The rear seat is in one Olco type with steel springs in compression to ring fairing of the very latest design. The outer piece, again following normal car practice, and tak e the taxying loads. Dunlop medium portion of the ring, however, is easily removable consists of a deep and fully sprung squab and pressure air wheels are fitted with Bendix brakes in order to provide ready access to the cylinder cushion. Armrests are provided at either side which can be applied on both wheels simul­ heads and valve rocker gear. Petrol is fed to and there are concealed ashtrays. Underneath taneously or on either wheel individually for the engine by gravity from two welded alu­ this scat is a luggage locker. In the roof of the handling on the ground. Streamline casings or minium tanks, one in each top wing, of 50 gal­ cabin there is a window with a sun blind and "spats " are fitted to the wheels and in fact a lons capacity each. The oil tan k is of the same also an emergency exit. The instrument board high degree of streamlining has been achieved construction and is situated in front of the fire­ extends the whole width of the cabin and is in the whole of the undercarriage structure. proof bulkhead. Its capacity is 6 gallons plus placed at a convenient angle. A valance' A tail wheel with Dunlop tyre is fitted. This air space. A Siddeley electric starter, operated hangs from the bottom of the instrument board tail wheel is provided with a shock absorber from an accumulator charged by an engine to the cabin floor and this is cut away in front and can swivel freely. A centralising spring driven generator, can be fitted at extra cost if of the two seats for the rudder pedals. The device is, however, fitted. required. A wooden airscrew is fitted, but a central control column carries " Throw-over " metal one can be supplied at extra cost if The tail is constructed entirely of steel spectacle type hand grips. Throttle and brake desired. tubing and is covered with linen fabric. The rudder is mass balanced but the elevators are unbalanced. The tail plane incidence can be altered during flight by means of a handle in the cabin which operates a screw jack at the tail. For the aileron controls in the bottom main plane, tic rods are used in the straight lengths to keep stretch down to a minimum. At the wing tips, where the run of the control changes direction to connect with the aileron levers, heavy weight cables are used which pass round large diameter pulleys, mounted on ball bearings. The elevator control is of the positive typ e and consists of a duralumin tube. The rudder is operated through an auxiliary bar under the cabin floor connected to the pedals by tic rods. From this bar twin flexible steel cables run to the rudder.

Journal

Aircraft Engineering and Aerospace TechnologyEmerald Publishing

Published: Sep 1, 1934

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