RR Spey
 

Was this the last engine developed to see service both in airliners and fast jets? Was it originally intended as a civil or as a military engine?

The CFM56 uses the core of the F101 military engine.
Wiki says the Spey was a civilian engine first.
RR Spey was the first engine I got to work on and understand its operation. The CASC unit (FFR) took me three classroom courses to get my head round its workings.
Happy days.

I thought that the CSDS was a nightmare. Especially changing it down route without a stand!

Succinctly put....and accurate as was the post that preceded yours.

A stand was as much a hindrance as a help to be frank. The Spey was designed by Rolls with the blissful illusion all maintenance would be carried out in a warm well lit bay in Derby. I know a few people who were involved with the development and testing of the heap of junk, one in particular with the above mentioned unit, and as he diplomatically concedes, RR couldn't be entirely to blame for supplier's design, ahem, "concept ".

I seem to recall the CSDS was a two man shoulder lift sort of thing to change it. We are talking BAC 1-11 here of course.

CSDS = Constant Speed Drive and Starter.

Thanks for the information, the 1-11 was my first jet, but after 35 years on Boeings I cant remember a great deal about it!

The Spey was for the Trident initially and had separate starter and CSD systems.
The 111 had the air-driven CSD/starter referred to above which, inter alia, added a good bit to the noise that aeroplane was renowned for!

RR Olympus - Vulcan, Victor, TSR-2 and Concorde

Not the Victor.

Vague recollection from spectator's balcony of 1-11s starting up at Gatwick with a rising whine then something like a clunk as though something was disengaging or was that the engine lighting off?

With 1-11s I've heard, once the engine was able to 'self sustain', the starter seemed to disengage then overspeed momentarily before the 'whine' wound down.

Dave, You are right, I stand corrected. Mercie!!

Spectators' balconies - now there's a memory or two

and for those who wish to indulge...... fast forward to 3m 40s and 23m 30s and enjoy....
ahhh the memories of hot days on the ramp and these beauties singing !

I have never seen that 2 stage HP cock operation during start up.

I seem to recall "Start" position of the HP cock was used if OAT was below 15C, otherwise it want straight to "OPEN"

On the 485-GD, for first start of the day, start selector switch to 'start', then at 15% HP cock to 'start position', then at 400 degrees TGT, HP cock to 'open'.
In European winters this was done for every start.