Cheetah Engine SR Part numbers

Thank you P&P  and Andrew.

I just had a Cheetah rear  supercharger housing vapour blasted and there is a “muckle” big SR part number on the block. Momentarily confused what it had to do with Saunders Roe -before recalibrating.

I also have a Valentine tank part and data plate that are Vickers Armstrongs – just need to head up to Cragside to see William Armstrongs house.

Farlam, a guess is that Armstongs were a general engineering firm that involved itselfs in far more than just aircrafts, so the plurals were the cultural reflux to dealing with a Vickers that involved itselfs in far more than just aircrafts. Both of them would have spent a lot of time deciding which mahogony Boardroom table was longer, so ‘the plurals’ would have been an extension of this. Poor old Siddeley was just a little rabbit sitting at a card table in comparison, so nobody needed to pump anything up. 

I have it on good authority from an authority on Siddeley Radials that the SR part number does indeed stand for Siddeley Radials. SR engine part numbers can be seen in Cheetah, Lynx, Genet etc.

Andrew a reasonable suggestion.

Another related question is why is it Armstrong Siddeley whereas it is Vickers Armstrongs (plural) ?

Siddeley Radial, perhaps??????

What an interesting question. Sorry I can’t help.