Re: Do airliner engens run at approximately constant speed, varying only torque?

From: (Simon Craig)
Organization: OzEmail Pty Ltd - Australia
Date:         17 Aug 95 04:58:46 
References:   1 2 3 4
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> >   The 707-321 I used to work on did have spring-loaded blow-in doors on
> >the inlets, or as I've heard some people call them, "auxillary air doors."
> >They would really start flapping if there was a mild oscillating
> >compressor stall... You could see them bouncing as you heard a "whoomp
> >whoomp whoomp whoomp..." :-)

> I have an old technical paper on the design of 707 inlets with blow in
> doors. I hadn't realized that these devices made it into production!!

Made it into production!  747s came out with those on the early JT9s!