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Designed for Aerobatics in Germany

Designed for Aerobatics in Germany 182 AIRCRAFT ENGINEERIN G July, 1929 Raab-Katzenstei n Firm at Cassel Produces Cantilever Biplane wit h One-Piece Wings for Stunt Flying By Dr. Waldemar Beck WIN G to the various competitions in Ger­ man y last year one typ e was neglected, a moderately high-powered machine for stun t flying. The Raab-Katzenstei n firm has now filled the gap with the "R.K . 26," which com­ bines high strength factor with speed and rapid climb. This machine is a cantilever biplane with one-piece wings. Above the fuselage the to p wing is carried on a capotage of steel struts and there is one N-stru t towards the wing-tip on each side. The American N.A.C.A. M-12 aerofoil section is used, giving low centre of pressure travel, the wings being constructed of wood and fabric covered. The fuselage is built up of wire-braced steel-tubes, the pilot's cockpit being in rear of the passenger seat. The empennage is also constructed of steel tubes . The tubular steel undercarriage has a divided circle supported by M struts for the bottom longerons. Four fuel tanks are provided, three in the wings and a special tank for upside-down flying in the fuselage, with a total capacity of 210 litres (46 gallons). I n th e first machine a 210-225-h.p. Armstrong- Siddeley "Lynx " engine is fitted, but the machine can also take a 240-h.p. Walter "Castor. " The maximum speed is 200 k.p.h. (124 m.p.h.) at 6560 feet, and the machine climbs 3,280 feet in 2¼ minutes. The ceiling is 24,500 feet. Reconditioning the Italian Air Force H E following extract from the speech of BR.2 " aeroplane, fitted with this motor, we will be able to say that Italian Aeronautics General Balbo in introducing the Air have a magnificent and powerful aerial machine. are equipped with up-to-date material. Estimates (details of which were pub­ Fo r night bombing the "Caproni Ca 73 " is These results have only been obtained at lished in our last issue) is sent us by our Italian undergoing important alterations which will th e cost of serious sacrifices. The cost of aero­ Correspondent:— make it more fitted for war purposes. planes is greatly increasing, for various reasons, A gradual substitution of new material for Fo r pursuit aviation the "Fiat CR 20" among which the principal are the greater old is taking place. As regards reconnaissance aeroplane is being substituted for the "Ansaldo cost of engines, owing to their increasing power, units , flying on the Ansaldo "A.300.4," planes AC 2, " "Ansaldo AC 3, " "Fiat CRI " and th e perfecting of equipment and metal con­ with the old motor is now prohibited. Ten recon­ "Fia t CR 2 " aeroplanes: two-thirds during struction. A reconnaissance aeroplane with naissance "Ansaldo A.300.4" squadrons have this financial year and one-third next year. engine has risen from Lire 20,000 (£978) to been provided with modern and reliable motors, Lire 225,000 (£2440); a pursuit plane from The maritime reconnaissance units are com­ while the rest of the reconnaissance units Lire 25,000 (£1030) to Lire 215,000 (£2224); pletely equipped with "Savoia S 59 bis," the are equipped with "Ansaldo A.120" and maritime bombing units with "Savoia S 55" ; the "Fiat " BR.1. plane cost lire 204,000 "Rome o RO.I " planes of modern and efficient while the maritime pursuit units a t the end of (£2217) while the "Fiat BR.2" plane, its type . this year will be completely equipped with successor, costs Lire 310,000 (£3478). Finally "Fia t CR 20 " seaplanes. th e old "C a 3 " bombing aeroplane cost Lire Regarding day bombing, the modern "Fia t 205,000 (£2228), while a "C a 73 " aeroplane A.25 " motor is being substituted for the old I n short, by the end of June, 1930, all the costs to-day Lire 505,000 (£5489). "Fia t A.14" motor, so that with the "Fiat old material will be replaced by new and we http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

Designed for Aerobatics in Germany

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb029154
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Abstract

182 AIRCRAFT ENGINEERIN G July, 1929 Raab-Katzenstei n Firm at Cassel Produces Cantilever Biplane wit h One-Piece Wings for Stunt Flying By Dr. Waldemar Beck WIN G to the various competitions in Ger­ man y last year one typ e was neglected, a moderately high-powered machine for stun t flying. The Raab-Katzenstei n firm has now filled the gap with the "R.K . 26," which com­ bines high strength factor with speed and rapid climb. This machine is a cantilever biplane with one-piece wings. Above the fuselage the to p wing is carried on a capotage of steel struts and there is one N-stru t towards the wing-tip on each side. The American N.A.C.A. M-12 aerofoil section is used, giving low centre of pressure travel, the wings being constructed of wood and fabric covered. The fuselage is built up of wire-braced steel-tubes, the pilot's cockpit being in rear of the passenger seat. The empennage is also constructed of steel tubes . The tubular steel undercarriage has a divided circle supported by M struts for the bottom longerons. Four fuel tanks are provided, three in the wings and a special tank for upside-down flying in the fuselage, with a total capacity of 210 litres (46 gallons). I n th e first machine a 210-225-h.p. Armstrong- Siddeley "Lynx " engine is fitted, but the machine can also take a 240-h.p. Walter "Castor. " The maximum speed is 200 k.p.h. (124 m.p.h.) at 6560 feet, and the machine climbs 3,280 feet in 2¼ minutes. The ceiling is 24,500 feet. Reconditioning the Italian Air Force H E following extract from the speech of BR.2 " aeroplane, fitted with this motor, we will be able to say that Italian Aeronautics General Balbo in introducing the Air have a magnificent and powerful aerial machine. are equipped with up-to-date material. Estimates (details of which were pub­ Fo r night bombing the "Caproni Ca 73 " is These results have only been obtained at lished in our last issue) is sent us by our Italian undergoing important alterations which will th e cost of serious sacrifices. The cost of aero­ Correspondent:— make it more fitted for war purposes. planes is greatly increasing, for various reasons, A gradual substitution of new material for Fo r pursuit aviation the "Fiat CR 20" among which the principal are the greater old is taking place. As regards reconnaissance aeroplane is being substituted for the "Ansaldo cost of engines, owing to their increasing power, units , flying on the Ansaldo "A.300.4," planes AC 2, " "Ansaldo AC 3, " "Fiat CRI " and th e perfecting of equipment and metal con­ with the old motor is now prohibited. Ten recon­ "Fia t CR 2 " aeroplanes: two-thirds during struction. A reconnaissance aeroplane with naissance "Ansaldo A.300.4" squadrons have this financial year and one-third next year. engine has risen from Lire 20,000 (£978) to been provided with modern and reliable motors, Lire 225,000 (£2440); a pursuit plane from The maritime reconnaissance units are com­ while the rest of the reconnaissance units Lire 25,000 (£1030) to Lire 215,000 (£2224); pletely equipped with "Savoia S 59 bis," the are equipped with "Ansaldo A.120" and maritime bombing units with "Savoia S 55" ; the "Fiat " BR.1. plane cost lire 204,000 "Rome o RO.I " planes of modern and efficient while the maritime pursuit units a t the end of (£2217) while the "Fiat BR.2" plane, its type . this year will be completely equipped with successor, costs Lire 310,000 (£3478). Finally "Fia t CR 20 " seaplanes. th e old "C a 3 " bombing aeroplane cost Lire Regarding day bombing, the modern "Fia t 205,000 (£2228), while a "C a 73 " aeroplane A.25 " motor is being substituted for the old I n short, by the end of June, 1930, all the costs to-day Lire 505,000 (£5489). "Fia t A.14" motor, so that with the "Fiat old material will be replaced by new and we

Journal

Aircraft Engineering and Aerospace TechnologyEmerald Publishing

Published: May 1, 1929

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