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In 1926 it designed and built the first aircraft the Midget lightplane.
The Eta was chiefly distinguished by setting three lightplane world records.
This is no lightplane: from nose to rudder the 700 is nothing but a small Airbus.
It was the first all-metal stressed-skin lightplane to be built and flown in the United Kingdom.
The type was Grand Champion lightplane at the following year's Sun'n'Fun.
The plans remain available from the Vintage Ultralight and Lightplane Association.
Even though kits are no longer available the Vintage Ultralight and Lightplane Association still offers plans for the design.
Exactly a week later, following mounting protest from lightplane owners' associations and air charter firms, the Federal Aviation Authority rescinded its order.
Plans were initially sold direct by the designer and, in the early 2000s, by the Vintage Ultra and Lightplane Association.
One of the few to make it further than the drawing board was the Sack AS-6, an experimental lightplane with a round-winged planform that first flew in 1944.
Despite the performance penalties and useful load restrictions caused by their weight, over the years floats have been fitted to almost every type of single-engined lightplane - and many twins.
The Wright-Morehouse powered Dart 1 received a lightplane prize in the 1926 Ford Air Tour, despite failing to complete the course, as it was the only lightplane competing.
Supporters also claim that research shows that Whitehead's 1901 "No. 21" airplane, a high-wing monoplane with an enclosed fuselage and two propellers up front, was closer to today's lightplane configurations than any built by his contemporaries.