Aircraft Engine Designations

This page is work in progress. I would appreciate any feedback from visitors. I especially would like to get answers to the questions below. For reciprocating engines:
 |||||||||||| |  |
 |||||||||||| |  .->  F: FADEC (Full Authority Digital Engine Control)
 |||||||||||| .---->  The Engine displacement in cubic inches
 |||||||||||.------>  L: Liquid cooled engine
 ||||||||||.------->  O: Opposed engine.  Other valid letters are:
 ||||||||||           I (Inline), V (V-engine), R (Radial), X (X-type)
 |||||||||.-------->  D: Diesel engine
 ||||||||.--------->  I: Fuel injected
 |||||||.---------->  S: Supercharged (Engine can operate at manifold
 |||||||              pressures above 29.92)
 ||||||.----------->  T: Turbocharged (Engine can maintain rated power
 ||||||               at altitude, up to a certain maximum)
 |||||.------------>  A: Aerobatic engine (inverted oil system, dry sump)
 |||||                AE: Aerobatic engine (inverted oil system, wet sump)
 ||||.------------->  G: Geared engine
 |||.-------------->  H: Horizontal Helicopter engine
 ||.--------------->  L: Left turning engine
 |.---------------->  V: Vertical Helicopter engine
 |.---------------->  M: Drone

For turboprop engines:

  TP 500 ---->  500 shp turboprop

The questions that I have are:
  1. How are rotary engines specified, how about wankel engines?
  2. Are there more variations for turboprop engines?
  3. How are jet engines specified?

Page last updated on Mon May 20 22:53:40 2024 (Mountain Standard Time)

Aircraft Engine Designations on

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