Terle Sportplane

Terle Sportplane
Joseph Terleph congratulates test pilot Burt Acosta on a successful first flight in the JT1. Taken Roosevelt Field, Long Island
Role	Sport aircraft
National origin	United States of America
Designer	Joseph Terle (Joe Terleph)
First flight	May 1931
Number built	1
Unit cost	$1200 in 1931

The Terle Sportplane was an original homebuilt design built by Joseph Terle, who had no prior aircraft design experience.^[1]

Design and development

The aircraft was developed from aviation articles and magazines between 1929 and 1931. The airfoil was copied from the Spirit of St. Louis profile.^[2]

The Terle Sportplane is an all wood parasol taildragger powered by a Salmson radial. After an accident with the prototype, the fuselage was changed to welded steel tube with aircraft fabric covering.

Operational history

The Sportplane was tested at Roosevelt Field in New York in 1931, but the CAA did not register it as a licensed aircraft. The aircraft was later test flown by the famous test pilot, Bert Acosta, who found it perfect for his use since he was currently grounded from flying licensed aircraft by a previous infraction. After performing aerobatics with the aircraft before a large crowd, Acosta and Terle planned to produce the aircraft together as the "Acosterle Wildcat". The aircraft was test flown for two years, but could not meet certification requirements.^[3] The JT1 devloped 40HP at 1800RPM and 52HP at 2200RPM.

Specifications (Terle Sportplane)

Data from Experimenter

General characteristics

• Capacity: 1
• Length: 16 ft (4.9 m)
• Wingspan: 29 ft (8.8 m)
• Height: 6 ft (1.8 m)
• Wing area: 122 sq ft (11.3 m²)
• Empty weight: 450 lb (204 kg)
• Fuel capacity: 10 gal (38 litres)
• Powerplant: 1 × Salmson 9 AD Radial, 40 hp (30 kW)

Performance

• Maximum speed: 87 kn; 161 km/h (100 mph)
• Cruise speed: 61 kn; 113 km/h (70 mph)
• Stall speed: 26 kn; 48 km/h (30 mph)

Joseph Terleph with JT2 and test pilot Bill Hunt, 1935

Bert Acosta with J.T.1 at Roosevelt Field, Long Island New York, on May 10th, 1931

References

^[1]

^[2]

External links

• Photo of Bert Acosta in the Terle Sportplane

1. ↑ "Acosta Stunts Hour in Plane Built by Novice". New York Herald-Tribune. May 11, 1931.  |access-date= requires |url= (help)
2. ↑ McRoe, Jack (May 1957). "The Terle Sportplane". The Experimenter Magazine.  |access-date= requires |url= (help)