Engineering:Flight Dynamics Flightsail
| Flightsail | |
|---|---|
| Role | Homebuilt aircraft |
| National origin | United States of America |
| Designer | Thomas H Purcell, Jr. |
| First flight | 27 October 1961 |
The Purcell Flightsail or Flight Dynamics Flightsail is an experimental towed glider by Thomas H. Purcell, Jr. He sold plans in several publications for the tow-launched hung-mass controllable kite-glider. He flew first off water in late 1961 and then arranged things for off-land and landing on land. His efforts would find similarity echo later in early 1963 by the SkiPlane of Mike Burns.
Development
The Flightsail is a single seat open cockpit parasol-winged glider with tricycle landing gear. The fuselage is constructed of a triangular pyramid-shaped or tetrahedral truss; the pilot was positioned in front of the triangle-control frame.[1] The framed flexible wing resembles a hang-glider arrangement as used on the kited gliders of Paresev program and by Ryan Aeronautical Company. The glider used weight-shift pendulum control using a stick with cables that shifts the cg of the frame relative to the wing pivoting above it. The wing is constructed with a 50-degree sweep based on NASA technical note D-443 and covered with polyethylene sheet with rip-stop fiberglass tape in a one-foot mesh pattern. The aircraft was tested by NASA test pilots Milton Orville Thompson and Victor Horton [2] to compare against the Rogallo wing being tested for space vehicle recovery.[3] Purcell published that in an early 1962 flight session, Francis M. Rogallo also had a flight in the Flightsail; years later Purcell would have a very different aircraft using the flexible-wing in a modification which was flown by Francis M. Rogallo. Purcell's later Flight Dynamics Flightsail VII used the flexible-wing in a modified format.
Specifications (Flightsail)
Data from Sport Aviation April 1962
General characteristics
- Crew: 1
- Wing area: 24 sq ft (2.2 m2)
- Empty weight: 75 lb (34 kg)
- Gross weight: 225 lb (102 kg)
Performance
See also
North Carolina Museum of History Related development
Aircraft of comparable role, configuration and era
References
- ↑ The "Flightsail"
- ↑ Space History Photo: The Birth of Hang Gliding
- ↑ "The Flightsail". Sport Aviation. April 1962.
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