Wuzak, look. mate.. AFAIR, S. Camm basically accused R-R of withholding supercharger tech from Napier,
-so the Griffon Spit got the high altitude gig.
And you have evidence of this?
In any case, the only ones who prevented RR supercharger tech from reaching Napiers were Napiers themselves.
It goes like this - Napiers start building a very advanced engine in substandard facilities, and struggled to make a reliable product. Napiers were going under, so the MAP asked RR to take over. The Napier board blocked that, so Napier was sold to English Electric instead. EE's first task was to make the Sabre reliable - so they dumped all manner of side projects (like 3 speed 2 stage superchargers) to concentrate on getting production right.
To that end Bristol were ordered to help Napier with sleeve production, and a pair of Sundstrand grinders were diverted from Pratt & Whitney to help with production.
& later withholding the Rotol props from the Tempest,
- so the high-boost R-Rs could look a bit more competitive as V1 interceptors..
Rotol was joint owned by Rolls-Royce and Bristol. Are you accusing Bristol too?
There was de Havilland, licence built Hamilton Standard, propellers which Hawkers could use. But I very much doubt that any props were withheld from Napier's use.
Griffons were profitably supported by R-R for the RAF Shackletons for decades..
I doubt that it was very profitable.
If it wasn't for Stanley Hooker's good boost work, the Merlin would've been pretty ordinary..
Well, how lucky was it for Rolls-Royce that they sought out and hired an aerodynamicist and mathematician to help develop their superchargers? What are the odds that such a move would yield improved superchargers?
& ironically, the Vulture powered Tornado ran on & on reliably, it was the brutal Manchester bomber slog that killed them..
The Vulture was an interesting engine. It had issues, no doubt, and Rolls-Royce were working through them. But the war came, and priority had to be given - the Merlin was powering several aircraft types, and most importantly the Spitfire and Hurricane, while the Vulture was used only on the Manchester and had the possibility of one further type - the Tornado. The Griffon was required by the FAA, and just so happened that they could fit it to the Spitfire, so it continued. Other projects were stopped (except the Crecy).
Given the resources, which RR didn't have to give, the Vulture could have been sorted and would have kept the Sabre honest.