The Guiberson A-1020 is a four-stroke diesel radial engine developed for use in aircraft and tanks.
|A T-1020 variant on display|
|Type||Diesel radial engine|
|National origin||United States of America|
|Manufacturer||Guiberson Diesel Engine Company|
|Designed by||Fred A. Thaheld|
|First run||January 1940|
|Major applications||Stinson Reliant|
|Developed from||Guiberson A-980|
Design and developmentEdit
Development of the Guiberson diesel engine started in the 1930s with the A-918 and A-980 which was first flown in 1931. It is a single-row direct drive nine-cylinder four-cycle engine.
- Guiberson A-918
- Rated at 185 hp (138 kW) - one of the initial development models for use on aircraft.
- Guiberson A-980
- Rated at 210 hp (160 kW) - one of the initial development models for use on aircraft.
- Guiberson A-1020
- Rated at 310 hp (230 kW) - production engines for aircraft use.
- Guiberson T-1020
- Rated at 250 hp (190 kW) - for use in light tanks such as the M-3 Stuart 
- The EAA AirVenture Museum in Oshkosh, Wisconsin has a T-1020 on display.
- There is a T-1020 on display at the New England Air Museum, Bradley International Airport, Windsor Locks, CT.
- Mustang Airport in Galt, California has three running T-1020's on display.
- There is a Guiberson T-1020 on display at the Western North Carolina Air Museum in Hendersonsonville, NC
- Jack Heemsoth, of Marshall, MI owns a running T-1020 and runs and displays it at local shows on a regular basis in the summers.
- Timeless Aero located in Grand Prairie, TX owns and is the process of returning to service a T-1020. A few pieces remain that the owner, a certified airframe and powerplant mechanic with an inspection authorization and mechanical engineer, will have to design and fabricate.
- Antique Gas and Steam Engine Museum, Vista, California is returning to service a T-1020. They also have two other T-1020 they plan to restore.
- Type: 9-cylinder air-cooled radial diesel piston engine
- Bore: 5.125 in (130.18 mm)
- Stroke: 5.5 in (139.70 mm)
- Displacement: 1,021 cu in (16.73 l)
- Length: 38.6 in (980 mm) including starter
- Diameter: 47.125 in (1,197.0 mm)
- Dry weight: 653 lb (296 kg)
- Designer: F. A. Thaheld
- Valvetrain: two pushrod operated valves per cylinder, with de-compression device for hand-turning or free-wheeling.
- Fuel system: Guiberson system fuel injection
- Fuel type: Diesel Index No.50
- Cooling system: Air-cooled
- Reduction gear: Direct-drive
- Eclipse inertia starter or Coffman cartridge starter
- Power output: 310 hp (230 kW), continuous at 2,150 rpm at sea level
- Compression ratio: 15:1
- Specific fuel consumption: 0.42 lb/hp/h (0.26 kg/kW/h) at 2,150 rpm; 0.382 lb/hp/h (0.232 kg/kW/h) at cruising speed
- Oil consumption: 0.02 lb/hp/h (0.012 kg/kW/h) at 2,150 rpm
- Power-to-weight ratio: 0.475 hp/lb (0.781 kW/kg)
- BMEP 113 psi (780 kPa) at rated output
|Wikimedia Commons has media related to Guiberson A-1020.|
- "Lightplane Diesel". Flying. July 1946.
- Wilkinson, Paul H. "Aircraft Diesels: Chapter 3 - The Guiberson Diesel" (PDF). Aircraft Engine Historical Society. Retrieved 14 March 2018.
- The Aeroplane, Volume 59.
- Grey, C.G.; Bridgman, Leonard, eds. (1938). Jane's all the World's Aircraft 1938. London: Sampson Low, Marston & company, ltd. p. 86d.
- Bridgman, Leonard, ed. (1947). Jane's all the World's Aircraft 1947. London: Sampson Low, Marston & Co. p. 67d.
- Arthur William Judge. Aircraft engines, Volume 2.[page needed]
- Guiberson T-1020 Diesel Engine, New England Air Museum