Griffin engines

[F4UDOA]

Found this data on the Griffin 58.

Thought it was interesting. Particularly the SFC and HP to lbs of fuel. Key Specifications (Original RR Specs prior to racing modifications)

 Model Griffon 58 (Griffon 74's were primarily used during 1980-1985)
 Original Application Avro Shackleton reconnaissance plane
 Engine Type V-12 Piston Aero Engine, 60° "V" (angle between banks)
 Material Aluminum crankcase, cylinder banks and heads; Alloy pistons; Steel liners, rods, cranks, etc.
 Bore x Stroke 6.0" x 6.6"
 Compression Ratio 6.0:1
 Supercharger type Two-speed, single-stage centrifugal 13.4" impeller
 Supercharger Ratio Medium Speed (MS) - 6.615:1, Full Speed (FS) 7.70:1
 Boost Control Automatic via Rolls-Royce auto boost regulator, w/increased boost when ADI active
 Fuel System Speed/Density type Fuel Injection (injected into eye of supercharger)
 Weight 2,000 lbs
 Power 2,450 HP takeoff at 2,750 RPM at SL with 25 psig boost using 115/145 PN fuel
 Performance 0.82 lbs/hp, 314 psi BMEP, 0.42 lbs fuel/hp/hr SFC
 Max. Piston Speed: 3,025 ft/min
 Total  Manufactured Approximately 8,000

[SELECTOR]

also had counter rotating prop

[joeblogs]

I'm filing all this stuff away.

[F4UDOA]

JoeBlogs,

I should have put your name in the post. I am doing the same for all WW2 engines I run across. I also found a Merlin reference and a R4360 which says it was the SFC king of ww2 fighters at .38.

I will post everything I find.

Based on the VVS test data our La-7 SFC is way overmodeled.