RR Spey
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.
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.
Thought police antagonist
Join Date: Jul 2003
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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 ".
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CSDS....... constant speed drive system?
I remember from 35 plus years ago on BAC 1-11s in far flung places, standing under the engine stub turning valves doing manual engine starts. The Spanish ground crew wouldn’t come near you!
I remember from 35 plus years ago on BAC 1-11s in far flung places, standing under the engine stub turning valves doing manual engine starts. The Spanish ground crew wouldn’t come near you!
Last edited by Offchocks; 28th May 2019 at 00:21.
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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!
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
Gnome de PPRuNe
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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!!
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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 !
ahhh the memories of hot days on the ramp and these beauties singing !
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.
In European winters this was done for every start.
