Tough. Proven. Efficient.

July 18, 2016 | Author: Andrew St Juste

This year marks the 50th anniversary of the best turboprop engine on the market. 50 years of dominance, let that sink in.

Before paper thin TVs and 4G, the original technology, greasy mechanical components, allowed people to do things that were never done before. Before computers Silicon Valley wasn’t in Palo Alto but in oil ridden mechanic shops across the country. People were excited about faster cars (the mustang was introduced a year earlier), the newly created “mini-skirt” and Star Trek’s first episode. 50 years ago, enter the TPE engine, a gem at that time but now a seasoned veteran.

In order to lead the pack every product must constantly improve and push the boundaries. 50 years of dominance doesn’t happen resting on laurels. The same is true for the TPE331 which has increased power and efficiency with every iteration, while simultaneously staying true to its roots. No matter the changes in the market or what our competition has does this engine, the best engine is still assembled and tested in the USA. Garrett grown, Honeywell honed, but this story isn’t a biography or an obituary it’s an intermission! With over 100 configurations and more than 200% increase in horsepower since inception, the TPE331 Turboprop engine made by Honeywell is proof you can teach an old dog new tricks.

Engine Tech Infusion to date:

  • 1975: TPE331-10: 10.5 to 1 PR Compressor; cooled first stage turbine and nozzle pushed T4.1 over 2000F
  • 1982: New technology low carbon combustion system
  • 1984: TPE331-14A/B Cooled first stage turbine & Nozzle; inserted blades on all 3 turbine disks; new compressor design pushing PR to 11.7 to 1; modular engine design; 20% upscale in size; 60% increase in power; 1st digital supervisory engine control box
  • 1987: TPE331-12 New compressor with increased airflow and higher pressure ratio; new design 3-stage turbine with improved efficiency
  • 1991: TPE331-14GR/HR : Investment cast aluminum gearbox housing; up-rated turbine with improved coatings; 2nd generation supervisory controller with ARINC 429 digital communication bus
  • 2001: effusion cooled combustion technology incorporated into TPE331-10/-12 combustion system
  • 2005: Single channel full authority DEEC engine control introduced on the TPE331-10 engine for MQ-9 UAV
  • 2015: FADEC control system design and certification launch 2019 certification
  • 2016 an Beyond: More iterations to come beginning this year!

50 years – 100 configurations – 5 generations of the TPE Engine.

Andrew St Juste

Andrew St Juste

Andrew is a Senior Specialist for Marcom here at Honeywell, with a focus on channel partners and short term sales. He has previous experience at a major technology company, enjoys writing, and is a board member of a non-profit in Haiti.

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