|TPE331 / T76|
|National origin||United States|
|Major applications||Fairchild Swearingen Metroliner
Rockwell Turbo Commander
The Garrett AiResearch TPE331 is a turboprop engine originally designed and manufactured by Garrett AiResearch, and produced by Honeywell Aerospace since 1999 after AlliedSignal/Garrett acquired Honeywell, keeping the Honeywell name. The TPE331 family includes 18 models and 106 configurations; the engines range from 575 to 1650 shaft horsepower. The military version is designated the T76.
Design and development
The TPE331 originated in 1961 as a gas turbine (the "331") to power helicopters. It first went into production in 1963. More than 700 had been shipped by the end of 1973. It was designed to be both a turboshaft (TSE331) and a turboprop (TPE331), but the turboshaft version never went into production; the first engine was produced in 1963, installed on the Aero Commander in 1964 and put into production on the Aero Commander Turbo Commander in June 1965.
As of July 2016, more than 13,500 TPE331 engines have been delivered, logging more than 122 million hours of flight time. The 715 shp TPE331-6 used in the Beech King Air B100 have a 400-hr. fuel nozzle cleaning interval, 1,800-hr. hot section inspection interval and a 5,400-hr. time between overhaul; approval is possible for 3,000-hr. HSIs and 6,000-hr. overhauls and engine reserves are cheaper than for the PT6A with $130,000 HSI checks and $190,000 overhauls.
- Aero/Rockwell Turbo Commander 680/690/840/960/1000
- Antonov An-2
- Antonov An-38
- Ayres Thrush
- BAe Jetstream 31/32
- BAe Jetstream 41
- Beech B100 King Air
- CASA C-212 Aviocar
- Cessna 441 Conquest II
- Comp Air 9
- Conroy Stolifter
- Dornier Do 228
- Fairchild Swearingen Metroliner
- General Atomics MQ-9 Reaper
- Grob G 520
- HAL HTT-40
- Handley Page Jetstream
- Kestrel K-350
- Mitsubishi MU-2
- North American Rockwell OV-10 Bronco
- Pilatus/Fairchild PC-6C Turbo-Porter
- Piper Cheyenne 400
- Short SC.7 Skyvan
- Short Tucano
- Swearingen Merlin
Fitted with TPE-331s as a replacement for their original engines
- Type: Single-shaft turboprop with integral gearbox
- Length: 46 in (1168 mm) (TPE331-43A), 42.82 in (1,088 mm) (TPE331-10)
- Diameter: 21 in (533 mm) (TPE331-43A)
- Dry weight: 336 lb (153 kg) (TPE331-43A), 385 lb (175 kg) (TPE331-10)
- Maximum power output: 575 hp (429 kW)(TPE331-43A), 940 hp (700 kW) (TPE331-10)
- Overall pressure ratio: 10.55 (TPE331-10)
- Specific fuel consumption: 0.534 lb/hp (325 g/kW) per hour (TPE331-10)
- Power-to-weight ratio: 1.71 hp/lb (2.8 kW/kg) (TPE331-43A), 2.44 hp/lb (4.01 kW/kg) (TPE331-10)
- Comparable engines
- Related lists
^ These aircraft were fitted with TPE-331s as a modification to replace their original engines
- "Honeywell Continues to Hone Turboprop Engine for 50th Anniversary" (Press release). Honeywell. July 2016.
- "Honeywell Aerospace TPE331 Spec Chart" Honeywell. Accessed: 29 August 2014.
-  Archived September 8, 2010, at the Wayback Machine.
- "TPE331-14 Turboprop Engine" Honeywell. Accessed: 29 August 2014.
- William A. Schoneberger and Robert R. H. Scholl, Out of Thin Air: Garrett's First 50 Years, Phoenix: Garrett Corporation, 1985 (ISBN 0-9617029-0-7), pp. 174-5.
- Canadian Museum of Flight, "Garrett TPE331"
- Schoneberger and Scholl, p. 203.
- Leyes, p. 725
- Fred George (Jan 30, 2017). "Used Aircraft Report: Beech King Air B100". Business & Commercial Aviation. Aviation Week.
- Canadian Museum of Flight "Garrett TPE331-43A"
- "TPE331-10 Turboprop Engine" (PDF). Honeywell. April 2006.
|Wikimedia Commons has media related to Garrett TPE331.|
- TPE 331 Cost Protection Programs
- TPE 331 Engine Conversions
- Power and fuel flow versus altitude and speed, for version 10. (Archive[dead link])
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