The Peyret-Mauboussin PM X, PM 4[Notes 1] or Mauboussin M.10 was a low power, single-seat, high wingcantilevermonoplane. Only one was built but it set several records in the under 250 kg (550 lb) class both as a landplane and a floatplane.[1]
The Peyret-Mauboussin PM X was the first of three designs to come from the firm formed by Pierre Mauboussin and Louis Peyret in 1928. It was designed to be as simple, inexpensive and cheap to run as possible to encourage more people to fly and was originally intended to compete at the September 1928 Orly International Lightplane Competition (Concourse d'avions légere) but was not completed in time.[2]
It had a one-piece wing, straight-tapered in plan out to elliptical tips and mounted on top of the fuselage. It also tapered outwards in thickness, with a horizontal lower surface, and had reflexed camber or double curvature. Its aspect ratio of 10 was high for the period. Structurally, the all-wooden wing was built around two box spars, ribs and three-ply skin. There were narrow-chord, full-span ailerons, each divided into two parts, the outer section conventional and the inner serving as a camber-changing flap.[2][3]
The PM X was powered by a 25 kW (34 hp) ABC Scorpion IIflat-twin engine, mounted in the nose with its cylinder heads exposed for cooling. Its fuel tanks were in the wing. The fuselage was a strikingly short, flat-sided, rectangular section structure, formed by four sprucelongerons and double ply covered, with the pilot's enclosed cabin under the wing leading edge; the PM X's tapered nose gave him a good forward view. Behind him there was a luggage space, capable of accommodating a passenger seat. Access to the cabin was via a port-side door. Behind the cabin the fuselage tapered markedly to a vertical tail, the shape of which became a Mauboussin trademark. It was tall, strongly straight-tapered to a rounded tip and carried a deep unbalanced rudder. The horizontal tail was also strongly straight-tapered, with an unbalanced one-piece elevator and mounted on the fuselage underside, clear of the bottom of the rudder.[2][3]
Its landing gear was fixed and conventional, with mainwheels on split, cranked axles mounted on a central inverted strut-pyramid from the lower fuselage longerons. There were rearward drag struts to the longerons as well as rubber cord shock absorbing struts. The undercarriage track was 1.30 m (4 ft 3 in). The PM X had a short, castering tailskid.[2]
Operational historyedit
The PM X was first flown on 7 December 1928,[1] piloted by Charles Fauvel.[4] In September 1929, flying from le Bourget, he began to set a series of world records for light aircraft in the under 200 kg (440 lb) empty weight 4th category.[5] On 4 September he covered 100 km (62 mi; 54 nmi) at 139.54 km/h (86.71 mph; 75.35 kn) and the following day reached an altitude of 5,193 m (17,037 ft). On the 6 September he covered 700 km (430 mi; 380 nmi) on a closed circuit and on the 10th flew a straight line record of 852.1 km (529.5 mi; 460.1 nmi).[6] A year later he extended the circuit record to 1,258 km (782 mi; 679 nmi) and added a duration record of 12 h 3 m.[7]
The M.10 was then modified into a seaplane (Hydravion in French), equipped with a pair of floats. Renamed the H.10, it first flew on 23 November 1930[1] and set more records in its new class.[8] It was withdrawn from use after an accident on 24 October 1932.[1]
^The cited Flight article is the only contemporary one to use the type name P.M.4. They may have confused aircraft and airfoil names or both may have had the same name.
Referencesedit
^ abcdef"The Mauboussin Corsaire". Air Britain Archive: 2010/1491. December 2010.
^ abcd"The Mauboussin P.M.4". Flight. XXI (7): 133. 14 February 1929.
^ abc"Le monoplan Mauboussin". Les Ailes (410): 3. 25 April 1929.
^"Une nouvelle avionette française". Les Ailes (395): 1. 10 January 1929.
^Frachet, André (12 September 1929). "La semaine..." Les Ailes (430): 11.
^Hirschauer 1929-30, L.; Dollfus, Ch. (1930). L'Année Aéronautique. Paris: Dunod. pp. 105–6.{{cite book}}: CS1 maint: numeric names: authors list (link)
^Hirschauer 1930-31, L.; Dollfus, Ch. (1931). L'Année Aéronautique. Paris: Dunod. p. 112.{{cite book}}: CS1 maint: numeric names: authors list (link)
^Hirschauer 1930-31, L.; Dollfus, Ch. (1931). L'Année Aéronautique. Paris: Dunod. p. 150.{{cite book}}: CS1 maint: numeric names: authors list (link)
April 12, 2024
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The Peyret Mauboussin PM X PM 4 Notes 1 or Mauboussin M 10 was a low power single seat high wing cantilever monoplane Only one was built but it set several records in the under 250 kg 550 lb class both as a landplane and a floatplane 1 Peyret Mauboussin PM XRole Single seat sports aircraftNational origin FranceManufacturer builder Louis PeyretDesigner Pierre MauboussinFirst flight 7 December 1928Number built 1Developed into Peyret Mauboussin PM XI Contents 1 Design and development 2 Operational history 3 Variants 4 Specifications M 10 landplane 5 Notes 6 ReferencesDesign and development editThe Peyret Mauboussin PM X was the first of three designs to come from the firm formed by Pierre Mauboussin and Louis Peyret in 1928 It was designed to be as simple inexpensive and cheap to run as possible to encourage more people to fly and was originally intended to compete at the September 1928 Orly International Lightplane Competition Concourse d avions legere but was not completed in time 2 It had a one piece wing straight tapered in plan out to elliptical tips and mounted on top of the fuselage It also tapered outwards in thickness with a horizontal lower surface and had reflexed camber or double curvature Its aspect ratio of 10 was high for the period Structurally the all wooden wing was built around two box spars ribs and three ply skin There were narrow chord full span ailerons each divided into two parts the outer section conventional and the inner serving as a camber changing flap 2 3 The PM X was powered by a 25 kW 34 hp ABC Scorpion II flat twin engine mounted in the nose with its cylinder heads exposed for cooling Its fuel tanks were in the wing The fuselage was a strikingly short flat sided rectangular section structure formed by four spruce longerons and double ply covered with the pilot s enclosed cabin under the wing leading edge the PM X s tapered nose gave him a good forward view Behind him there was a luggage space capable of accommodating a passenger seat Access to the cabin was via a port side door Behind the cabin the fuselage tapered markedly to a vertical tail the shape of which became a Mauboussin trademark It was tall strongly straight tapered to a rounded tip and carried a deep unbalanced rudder The horizontal tail was also strongly straight tapered with an unbalanced one piece elevator and mounted on the fuselage underside clear of the bottom of the rudder 2 3 Its landing gear was fixed and conventional with mainwheels on split cranked axles mounted on a central inverted strut pyramid from the lower fuselage longerons There were rearward drag struts to the longerons as well as rubber cord shock absorbing struts The undercarriage track was 1 30 m 4 ft 3 in The PM X had a short castering tailskid 2 Operational history editThe PM X was first flown on 7 December 1928 1 piloted by Charles Fauvel 4 In September 1929 flying from le Bourget he began to set a series of world records for light aircraft in the under 200 kg 440 lb empty weight 4th category 5 On 4 September he covered 100 km 62 mi 54 nmi at 139 54 km h 86 71 mph 75 35 kn and the following day reached an altitude of 5 193 m 17 037 ft On the 6 September he covered 700 km 430 mi 380 nmi on a closed circuit and on the 10th flew a straight line record of 852 1 km 529 5 mi 460 1 nmi 6 A year later he extended the circuit record to 1 258 km 782 mi 679 nmi and added a duration record of 12 h 3 m 7 The M 10 was then modified into a seaplane Hydravion in French equipped with a pair of floats Renamed the H 10 it first flew on 23 November 1930 1 and set more records in its new class 8 It was withdrawn from use after an accident on 24 October 1932 1 Variants editM 10 Original PM X as described M 10bis Alternative designation for the H 10 floatplane H 10 M 10 converted to floatplaneSpecifications M 10 landplane edit nbsp Peyret Mauboussin PM X 3 view drawing from L Aerophile Salon 1934Data from Les Ailes April 1929 3 General characteristicsCrew One Length 4 4 m 14 ft 5 in Height 1 85 m 6 ft 1 in Wing area 10 m2 110 sq ft Airfoil P M 4 Empty weight 198 kg 437 lb Gross weight 334 kg 736 lb Fuel capacity 41 kg 90 lb including oil Powerplant 1 ABC Scorpion II flat twin 25 kW 34 hp at 2 300 rpm Propellers 2 bladedPerformance Maximum speed 145 km h 90 mph 78 kn at ground level Cruise speed 125 km h 78 mph 67 kn 1 Endurance 10 h Service ceiling 7 000 m 23 000 ft absolute Time to altitude 17 min 35 s to 2 000 m 6 600 ft Landing speed 65 km h 40 mph 35 kn 1 Notes edit The cited Flight article is the only contemporary one to use the type name P M 4 They may have confused aircraft and airfoil names or both may have had the same name References edit a b c d e f The Mauboussin Corsaire Air Britain Archive 2010 1491 December 2010 a b c d The Mauboussin P M 4 Flight XXI 7 133 14 February 1929 a b c Le monoplan Mauboussin Les Ailes 410 3 25 April 1929 Une nouvelle avionette francaise Les Ailes 395 1 10 January 1929 Frachet Andre 12 September 1929 La semaine Les Ailes 430 11 Hirschauer 1929 30 L Dollfus Ch 1930 L Annee Aeronautique Paris Dunod pp 105 6 a href Template Cite book html title Template Cite book cite book a CS1 maint numeric names authors list link Hirschauer 1930 31 L Dollfus Ch 1931 L Annee Aeronautique Paris Dunod p 112 a href Template Cite book html title Template Cite book cite book a CS1 maint numeric names authors list link Hirschauer 1930 31 L Dollfus Ch 1931 L Annee Aeronautique Paris Dunod p 150 a href Template Cite book html title Template Cite book cite book a CS1 maint numeric names authors list link Retrieved from https en wikipedia org w index php title Peyret Mauboussin PM X amp oldid 1146387405, wikipedia, wiki, book, books, library,
