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Quicksilver MX : ウィキペディア英語版
Eipper Quicksilver

Quicksilver is a line of single and two-place high wing, single-engine, ultralight aircraft that evolved from weight-shift hang gliders including Bob Lovejoy's High Tailer.
The earliest powered version, the Quicksilver C, was created as a self-launching hang glider, designed to allow pilots who lived in the flatlands to be able to self-launch without a hill. The design later evolved into an ultralight aircraft for powered cross-country flying.〔Cliche, 2001, page E-29〕
The aircraft line has been in production since the late 1970s and remains in production in 2012 by Quicksilver Aircraft of Temecula, California.〔Bayerl, Robby; Martin Berkemeier; et al: ''World Directory of Leisure Aviation 2011-12'', page 116. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X〕
==Design and Development==
Founded by Dick Eipper, Eipper Formance began manufacturing the early Bob Lovejoy-designed Quicksilver ultralights in the late 1970s when hang gliding was very popular. The Quicksilver hang gliders differed from most hang gliders of that time period in that the Quicksilver had a rigid wing and a tail with a horizontal stabilizer and a rudder. At that time, the majority of hang gliders were simple Rogallo wing-type hang gliders.〔
Eipper added a seat, wheels, and a small engine behind the wing of the hang glider, and the Quicksilver ultralight was born. This aircraft was controlled by pushing a bar forwards and backwards, and side to side, in the same way that hang gliders are controlled. This shifted the center of gravity of the aircraft and allowed the pilot to control the plane. Many pilots wanted an aircraft that was controlled with a stick and rudder, similar to the way "typical" light airplanes are controlled, so Eipper added rudder and elevator control surfaces to the Quicksilver ultralight, giving it two axes of control. This aircraft was called the Quicksilver MX. The high dihedral of the wings caused the plane to bank when the aircraft was turned with the rudder, but there was no direct means of controlling the roll axis of the airplane—the aircraft only rolled in response to the yaw axis. Pilots still wanted a true three-axis control ultralight, so Eipper added spoilers. The spoilers were ineffective, providing only a minimal amount of control over the roll axis. The next generation of MX had true ailerons which gave the aircraft full roll authority.
The single-seat Quicksilver MX not only complies with the US FAR 103 Ultralight Vehicles rules, but was in fact the aircraft around which the rules were developed. The Quicksilver was the most popular ultralight aircraft design when the regulations were first drafted in the early 1980s.〔Cliche, 2001, page B-47〕
The Quicksilver MX evolved over the years. A two-seat model was added for training purposes, although the two-seater was not legally an ultralight. Eipper Formance changed their name to Eipper Aircraft and then Quicksilver Aircraft, and they are still in business, although they are not producing aircraft in the quantity that they were at the height of the ultralight craze in the mid 1980s.
The current production MX Sports and Sprints are built from anodized aluminum tubing that is fastened together with bolts. The wings and tail are covered with pre-sewn Dacron envelopes. Reported construction times from the kit are 30–40 hours.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Eipper Quicksilver」の詳細全文を読む



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