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: 

 VLHGATSIORL 550F
 ||||||||||| |  |
 ||||||||||| |  .->  FADEC (Full Authority Digital Engine Control)
 ||||||||||| .---->  The Engine displacement in cubic inches
 ||||||||||.------>  Liquid cooled engine
 |||||||||.------->  Radial engine
 ||||||||.-------->  Opposed engine.  Other valid letters are:
 ||||||||            I (Inline), V (V-engine), R (Radial), X (X-type)
 |||||||.--------->  Fuel injected
 ||||||.---------->  Supercharged (Engine can operate at manifold
 ||||||              pressures above 29.92)
 |||||.----------->  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)
 |||.------------->  Geared engine
 ||.-------------->  Helicopter engine
 |.--------------->  Left turning engine
 .---------------->  Vertical mount engine (for Opposed engines)

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?

© Günther Eichhorn
Springer
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Norwell, MA 02061
USA
781-871-6600 ext. 1854
Email Guenther Eichhorn

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