SUMPAC

Short description: British human-powered aircraft

SUMPAC

SUMPAC on display at the Solent Sky museum.
Role  | Human-powered aircraft
First flight  | 9 November 1961
Number built | 1

The Southampton University Man Powered Aircraft (or SUMPAC) on 9 November 1961 became the first human-powered aeroplane to make an officially authenticated take-off and flight.[1] It was designed and built by Southampton university students between 1960 and 1961 for an attempt at the Kremer prize, but it was never able to complete the 'figure-of-eight' course specified to claim the prize money.[2]

## Contents

* 1 Design and development
* 2 Specifications (SUMPAC)
* 3 See also
* 4 References
* 4.1 Notes
* 4.2 Bibliography

## Design and development

The aircraft was designed and built by a team of post-graduate students from Southampton University. Intended to compete for the £50,000 Kremer Prize (requiring successful completion of a one-mile (1.6 km) 'figure of eight' course) the project was funded by the Royal Aeronautical Society.[2]

The aircraft is of conventional configuration, with the exception of a pylon mounted pusher propeller, and is constructed from balsa, plywood and aluminium alloy. Originally covered with silver-doped Nylon the aircraft now sports a transparent plastic skin on the fuselage.

The SUMPAC was powered using pedals and chains to drive a large two-bladed propeller. Piloted by noted gliding instructor and test pilot Derek Piggott, its first flight on 9 November 1961 at Lasham airfield covered a distance of 70 yards (64 m) and climbed to a height of six feet (1.8 m).[2] The longest flight made was 650 yards (594 m) rising to a maximum height of 15 ft (4.6 m). Turns were attempted, with 80 degrees the best achieved. A total of 40 flights were made by SUMPAC.[3] After a crash in 1963 which caused damage to the fragile structure it was decided to retire the aircraft although it had been repaired.[2]

The SUMPAC is currently on display at the Solent Sky museum; it was loaned for some time to the Shuttleworth Collection but now resides in its hometown of Southampton.

## Specifications (SUMPAC)

Data from The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II[2][4][5]

General characteristics

* Crew: 1
* Length: 24 ft 9 in (7.54 m)
* Wingspan: 80 ft 1 in (24.4 m)
* Wing area: 300 sq ft (27.9 m2)
* Aspect ratio: 21.3
* Airfoil: NACA 65a 818
* Empty weight: 128 lb (58.1 kg)
* Gross weight: 268 lb (121.6 kg)

Performance

* Never exceed speed: 21 mph (33 km/h, 18 kn)
* g limits: +1.5 -1 at 26.4 km/h (16.4 mph; 14.3 kn)
* Maximum glide ratio: 34 at 105 km/h (65.2 mph; 56.7 kn)
* Rate of sink: 37 ft/min (0.19 m/s) at 27 km/h (16.8 mph; 14.6 kn)
* Lift-to-drag: 36 at 32 km/h (19.9 mph; 17.3 kn)
* Wing loading: 0.89 lb/sq ft (4.35 kg/m2)

## See also

Aircraft of comparable role, configuration and era

* HMPAC Puffin
* HPA Toucan
* Malliga 1
* MacCready Gossamer Albatross
* MacCready Gossamer Condor
* Goodhart Newbury Manflier
* Southend MPG Mayfly

## References

### Notes

1. ↑ "BBC News web-site". https://www.bbc.co.uk/news/uk-england-hampshire-15705954. Retrieved 15 November 2012.
2. ↑ 2.0 2.1 2.2 2.3 2.4 Guttery 1969, p. 70.
3. ↑ Details of SUMPAC
4. ↑ Shenstone, B.S.; K.G. Wilkinson (1963) (in English, French, German). The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II (1st ed.). Zurich: Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue. pp. 120-121.
5. ↑ Flight International, 23 December 1971 p1014

### Bibliography

* Shenstone, B.S.; K.G. Wilkinson (1963) (in English, French, German). The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II (1st ed.). Zurich: Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue. pp. 34–36.
* Guttery, T.E. The Shuttleworth Collection. London: Wm. Carling & Co, 1969. SBN 901319-01-5
* Man powered flight advances

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