Engines and fuels :)

[RRAM]

Ok, the other thread about teh F8F got me thinking.

there was a link to a chart which showed performance of Tempest IIs using 150 octane fuel and water injection and getting 3000hp out of the Napier engine.


We all know that during the war the allieds had high octane fuel in excess, and that the germans had to do with much lesser quality fuels, partly compensated with the usage of MW50 as antidetonant.


Now I ask...can someone give some realistic data on how would some high performance engines perform when using 150 octane fuel instead of the ones they used in the last days of WWII?...

at this moment I know that...

Ju213A

• Using B4 delivered 1750hp@SL
• Using B4 and some strange item (LOL, naudet, hohun, come here and lend me a hand), delivered 1900hp@SL
• Using B4 and MW50 delivered 2100hp@SL
• Using C3 delivered .............????
• Using C3 and MW50 delivered 2600hp???? (I've read this power output somewhere, can't recall where exactly. is that correct?)

DB605D:

• Using B4 delivered 1450hp@SL
• Using B4 and MW50 delivered....1800hp@SL?
• Using C3 and MW50 delivered....2000hp@SL?

DB603A:

• Using B4 delivered 1750hp@SL
• No idea with other fuels or MW50.

BMW801D2 -

• Using B4 fuel delivered 1750hp@SL
• Using B4 and C3 petrol injection delivered 1900@SL
• Using B4 and MW50 delivered...2100hp?@SL? (not sure about that)

CAn someone complete, or give more data on power outputs, and settings used for those engines?.

of course with any other engine it will be great, too :)


And then, can someone give a more or less realistic estimate on how would those engines perform with 150 octane fuel (with and without Mw50)? :)

I think this might be an interesting exercise  

[Pei]

The Tempest II was fitted with the Bristol Centaurus radial engine  ( the same as that fitted to the Sea Fury).


Both Centaurus and Sabre engined Tempests were tested successfully at very high boosts  (at least one of reference I've seen claims that a Sabre test was run at 4000hp but I rather suspect that if this even happened it was on a test bed and not in flight). I have not come across any records of them being used in service.

[butch2k]

C3 which was approximatly 100/130 PR along with MW50 was roughly equivalent to 100/150.

[Nashwan]

Ram, as a guide, the Centaurus delivered

Just over 2500hp with 100/130 fuel, which was close to C3

Nearly 2800hp with 100/150 fuel, or with 100/130 and water injection

Nearly 3000hp with 100/150 and water injection.

If you look at the chart, you can see 100/130 and MW is similar to 100/150. Not exactly the same, but pretty close. 100/130 and MW has a slight advantage.

The problem of working out performance with MW 50 and 100/150 is that the engine has to be strong enough. Also, the supercharger has to be able to deliver the necessary boost pressure.

[RRAM]

Nice info so far, guys keep it coming.

I mixed Tempest V with Tempest II...was very late hour for me when I wrote that, hehehe. the Bristol Centaurus was a magnific engine, that for sure



So, back on topic... C3+MW50 was roughly equivalent to 150 octane. Good

Any idea on what could be, roughly, the performance of those engines with 150 octane+water injection?

and if someone can complete (or correct) the list of performances I wrote, that would be nice too .

[minus]

hey ram that worth to thing about ,   how about have 3 type or more fuel and aditive  loadouts for some 1 or 3 perks ???????

so any  P 47 driver can for 3 perks have the  super field  bost version

any lw  can have  it mv 50  


some early planes only variants of fuel ,

to make  the thing interesant some bad combination  to make havoc or dmg the engine



so not just  all the super options , to have thing what mix with  what

[RRAM]

for the people who might have missed this thread

[senna]

I've never heard of 100/150. Its more like 115/145 (today that is) for standard aviation fuels (and thats really high quality stuff, expensive). The best gasoline you can buy if you can find it is also known as "wartime military spec avaiation fuel". Thats the 150 octane rating stuff. Thats probably around 115 or 120 normal aspirated / 150 turbo rated. That 100/150 seems strange to me, especially back in those days.  Shrug, just FYI.