Fuel Octane differences?

[save]

C3 was required for the 190, 109 could used with both b4 and c3, with MW50 injection octane levels increased on b4 fuel.
About 2/3rd of German production 1944 was C3 fuel.


According to a British post war report (http://www.fischer-tropsch.org) German C3 fuel had properties closer to 100/150 than 100/130.

[Guppy35]

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The 30 gallon was the most common but the 90 gallon was certainly not rare. I'm not fussed for MA use, but it would certainly be handy for scenarios. I remember the thread discussing rationalising the spitfire tree in AH, i can't seem to find it though.

I've been listening to oral histories hosted on the IWM site (I would recommend listening to a couple, they're very interesting). I was listening Wing Commander Peter Parrott's WWII experiences recently and in one of his tapes he talks about how he pulled the lever so hard to drop his tank he broke it.   It's about 3 hours long in begins with his experiences in France 1940 all the way up to his post WWII experiences. It can be found here: http://www.iwm.org.uk/collections/item/object/80012874

BTW this hijack was unintentional. Sorry.

I corresponded with Peter Parrott back in the early 80s as he had some experience with the XII.  An interesting man

The connection between the cockpit and DT in the Spit was not very sophisticated.  One of the Spit XII pilots I got to know had the same thing happen in an XII.  He pulled so hard on the DT lever it snapped.  He let his squadron mates know he was going to have to belly in as the fuel tanks didn't switch over and he was dead stick.   One of the other pilots told him to "Pull your wire man!" meaning take the actual wire running to the tank and pull it.  Apparently it was also slang for playing with oneself.  Tom responded "This is no time for jest!" as he glided down to become a POW.

The 90s were used for ferry flights and on a few occasions for long range escort later in the war.  But the weight was so great there was always risk of blowing a tire, which some did.  The 45 was used more often, but again, I think the decision to use the 30 was the most logical.  It was the one used during 42-44 for cross Channel flights.  With the Griffon birds due to the increased fuel consumption it was standard to fly with the 30 amd they often forgot it was on.

[MiloMorai]

C3 was required for the 190, 109 could used with both b4 and c3, with MW50 injection octane levels increased on b4 fuel.
About 2/3rd of German production 1944 was C3 fuel.


According to a British post war report (http://www.fischer-tropsch.org) German C3 fuel had properties closer to 100/150 than 100/130.

Early 190s used B4 fuel. It was from the BMW801D engine on that required C3 fuel.