[EMAIL=”rancomp@bigpond.net.au“]rancomp@bigpond.net.au[/EMAIL]

Hi,
I m ex RAAF and lost my course notes some years ago and wonder if these are still available?
TIA Nev williams

Piston engine fuels, top end, 100-130 (green) and 115 -145 (red).
.

re Fuel Colour In my part of the world Red = 80-87 Green =100-130 and Purple =115 -145
and Clear 80 unleaded.

Piston engine fuels, top end, 100-130 (green) and 115 -145 (red).
FEAF carried out trials using 100U oil on a couple of Beverleys at Seletar circa 1963 in place of OM270. Then reverted back to OM270. Reasons I know not.
With the introduction of 100LL it was anticipated in the Historic a/c world there would be problems but I do not believe they manifested themselves as max TO power or max cruise was very rarely used.
My personal opinion is that overhaul and maintenance knowledge has diminished over the years and the fact that the correct inhibiting procedures are not followed when aircraft are inactive.

OM270 is a heavier viscosity oil the 100, so it may be because of the higher ambient ground temps in the tropics.

At Richmond Australia , 1960s, we were using 100 U for both Hastings (weekly Courier service) and Beverleys (occasionally).
We had to re-oil using Hand pumps from 44 Gallon Drums and always at night.

Wait, since the topic started with the question of Furys having their engines swapped with US units, why are compounded versions of 3350 being mentioned here for comparisons anyway? They had their own reliability issues and nobody uses them in air-racing, as there are other methods of increasing performance for racing purposes. Neither “Rare Bear” nor “September Fury” use compounded Cyclones.

Unless we’re just talking generally about 3350 vs Centaurus, then yes, any version can be discussed.

In either case, I’m fairly sure the swaps were done mostly because of spare parts availability. Neither parts nor qualified workforce for maintaining modified 3350 are simple to find in US these days and I can only imagine they’re almost nonexistent for much less popular British units.

Topic started with why the Sea Fury’s Centaurus were swapped with Wright R3350 turbo compound, Not US Radials in General.

Fedden Butler = FB. Fedden was the celebrity chef while Butler cut the onions, but the coding acknowledges it was a team effort. I wonder what the power to weight ratio is between 3350 and Centaurus?

Thanks for the correction.

In my post of two days ago the other reason was power. Instead of relying on Memory I refreshed it by looking at Engine powere specs.

a R3350-30W (Military engine) could produce 3700 BHP Wet 3500 dry

Centaurus the highest spec engine about 3000 BHP.

So the wright Turbo compound was the winner in Power stakes.

It was nice to see that my remark the 100 U oil was a necessity being endorsed and that the Sleeve valve engines are/were a magnificent piece of engineering.

Just a small aside and bit of trivia. the Sleeve valve engines parts have a Part number beginning with FB translated Fedden Bristol