| 词条 | Emair MA-1 | |||||||||||||||
| 释义 |
The Emair MA-1 Paymaster was a 1960s American agricultural biplane aircraft built by Emair, which was part of the Hawaiian Murray company. The prototype was constructed and flown in New Zealand, with production aircraft built in the United States at Harlingen, Texas. DevelopmentThe prototype Murrayair MA-1 was built by Air New Zealand on behalf of Murrayair Limited of Hawaii, United States. Based on the Stearman 75 Kaydet, it had an increased wing area and modification to the forward fuselage to accommodate a pilot (in a raised cockpit for better visibility), a jump seat (used to carry an assistant or mechanic between stations), and a chemical hopper. The fixed tailwheel landing gear was strengthened and a more powerful Pratt & Whitney Wasp radial engine fitted. It first flew in New Zealand on 27 July 1969, then it was dismantled and shipped to Hawaii to obtain United States type certification; certification was awarded on 14 April 1970.[1] Production and developmentEmair began production of the aircraft at Harlingen in Texas. The production aircraft were named Agronemair MA-1 Paymaster at first, then designated the Emair MA-1 Paymaster. Production ended in 1976 after 25 had been built.[2] In 1975 Emair developed an improved version, the Emair MA-1B Diablo 1200, which was essentially an MA-1 with a more powerful Wright R-1820 radial engine. The more powerful engine did not increase the maximum takeoff weight but allowed operations at higher altitudes, and its lower output speed helped reduce propeller noise. At the end of the 1980s the company halted production after a further 23 Diablos had been built.[3] Variants
New Zealand-built prototype with a 600hp (447kW) Pratt & Whitney R-1340-AN1 Wasp radial engine.
Production aircraft, 25 built.
Improved version with a 900hp (671 kW) de-rated Wright R-1820 radial engine, 48 built. Specifications (Diablo 1200){{aerospecs|ref=The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985), 1985, Orbis Publishing, Page 1600 |met or eng?=eng |crew=One |capacity= |length m=9.14 |length ft=30 |length in=0 |span m=12.70 |span ft=41 |span in=8 |swept m= |swept ft= |swept in= |rot number= |rot dia m= |rot dia ft= |rot dia in= |dia m= |dia ft= |dia in= |width m= |width ft= |width in= |height m=3.58 |height ft=11 |height in=9 |wing area sqm=37.16 |wing area sqft=400 |swept area sqm= |swept area sqft= |rot area sqm= |rot area sqft= |volume m3= |volume ft3= |aspect ratio= |empty weight kg=1928 |empty weight lb=4250 |gross weight kg=3810 |gross weight lb=8400 |lift kg= |lift lb= |eng1 number=1 |eng1 type=de-rated Wright R-1820 radial piston engine |eng1 kw=671 |eng1 hp=900 |eng1 kn= |eng1 lbf= |eng1 kn-ab= |eng1 lbf-ab= |eng2 number= |eng2 type= |eng2 kw= |eng2 hp= |eng2 kn= |eng2 lbf= |eng2 kn-ab= |eng2 lbf-ab= |max speed kmh=188 |max speed mph=117 |max speed mach= |cruise speed kmh= |cruise speed mph= |range km= |range miles= |endurance h= |endurance min= |ceiling m= |ceiling ft= |glide ratio= |climb rate ms=8.6 |climb rate ftmin=1700[4] |sink rate ms= |sink rate ftmin= |armament1= |armament2= |armament3= |armament4= |armament5= |armament6= }} References1. ^J W R Taylor 1971, p.360. {{commons category|Emair MA-1}}{{Refbegin}}2. ^J W R Taylor 1980,p.333. 3. ^Simpson 1991, page 349 4. ^J W R Taylor 1980, p.334.
5 : United States agricultural aircraft 1960–1969|Emair aircraft|Single-engined tractor aircraft|Biplanes|Aircraft first flown in 1969 |
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