Re: Geared turbofans

Date:         29 May 98 02:44:05 
From: (Tarver Engineering)
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On 17 May 98 00:43:17 , Don Stauffer <>

>Tarver Engineering wrote:
>> On 11 Apr 98 02:16:40 , Don Stauffer <>
>> wrote:
>> >I am particularly thinking of "unducted fans."
>> An unducted fan has two rows of counter rotating fan blades.
>> John
>So would some of those early twin row counter-rotating turboprops (I
>forget the planes, they were navy prototypes) qualify?

The Navy airplanes used regular propellers mounted forward, I believe.
The English produced piston versions of these.

>  How about the ones on the Russian Bear turboprop?

When GE built their counter rotating turboprop, Russians where bending
the metal.  There is a high probability that the blades are nearly
identical to the Russian version.