Superfan

Date:         22 Nov 97 20:41:27 
From:         Marc Schaeffer <marcmsc@geocities.com>
Organization: None
Followups:    1 2
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I would like to know what happens in the domain of the Superfan engines.
A bit of history may be interesting. The Superfan -Ultra high bypass-
engines were initially foreseen to be mounted on the A340. IAE intended
to build a variant of the V2500 engine which incorporated a gearbox
driven, variable pitch ducted fan added to the front of the 2500 core.
Calculated fuel savings of 20% compared to classic engines were
expected. The idea came up in Dec-86 and was cancelled in Apr-87 due to
technical risks.
- What's the status on UHB engines nowadays, is it under
development/trials (PW/RR/GE/IAE/CFM ...) somewhere ?
- Have similar/simplified techniques been adopted in the GE90 or Trent's
?
- What about reliability, weight, costs, would they not reduce the
expected cost advantage (-20% for fuel) ?
- Is there some info about it on the web ?

Just curious,
...........................................................
Marc Schaeffer, Luxembourg // mailto:marcmsc@geocities.com
---->>>>> Check out my aircraft homepage <<<<<----
WWW  http://www.geocities.com/CapeCanaveral/Lab/8803/