| 词条 | Curtiss HA | |||||||||||||||
| 释义 |
The Curtiss HA (sometimes Dunkirk Fighter) was an American biplane seaplane designed by Captain B.L. Smith of the United States Marine Corps, and built by Curtiss Aeroplane and Motor Company.[1] Development and designThe HA was a two-seat biplane with a central float and balancing floats on the wingtips. The fuselage was wood with a fabric covering. The plane was powered by a Liberty 12 engine in the nose. The prototype was ordered in December 1917, and its first flight was on 21 March 1918. During testing the aircraft proved very unstable, with an overly heavy tailplane. The aircraft was destroyed in a crash.[1] Two more prototypes were ordered, designated HA-1 and HA-2. the HA-1 was constructed of salvaged parts from the original, but its tailplane and radiator were redesigned, and its wings were moved further aft. The HA-1 caught fire during a flight. The HA-2 had a wider wingspan, and performed better, but as the war was almost over, no production order was received.[1] Operational historyThree landplane versions were used as Mail planes.[1] Specifications (HA-2){{aerospecs|ref=Angelucci, 1987. pp 116-117.[1] |met or eng?=eng |crew=2 |capacity= |length m=9.37 |length ft=30 |length in=9 |span m=12.80 |span ft=42 |span in=0 |height m=3.47 |height ft=11 |height in=5 |wing area sqm=45.52 |wing area sqft=490 |empty weight kg=1,336 |empty weight lb=2,946 |gross weight kg=1,772 |gross weight lb=3,907 |eng1 number=1 |eng1 type=Liberty 12 |eng1 kw= |eng1 hp=360 |eng2 number= |eng2 type= |eng2 kw= |eng2 hp= |max speed kmh=190 |max speed mph=118 |cruise speed kmh= |cruise speed mph= |stall speed kmh= |stall speed mph= |range km= |range miles= |endurance h= |endurance min= |ceiling m= |ceiling ft= |g limits= |roll rate= |climb rate ms=4 |climb rate ftmin=790 |armament1=4 × .30 in (7.62 mm) machine guns |armament2= |armament3= |armament4= |armament5= |armament6= }}{{aircontent |see also= |related= |similar aircraft= |lists= }} References{{commons category|Curtiss military aircraft}}
1. ^1 2 3 4 5 Angelucci, 1987. pp 116-117.
5 : United States fighter aircraft 1910–1919|Curtiss aircraft|Single-engined tractor aircraft|Biplanes|Aircraft first flown in 1918 |
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