[Robo.]

Originally Posted by Kurfürst

It's mind dazzling, I agree.

http://kurfurst.org/Engine/DB60x/DB6...sheets_A1.html
http://kurfurst.org/Engine/DB60x/DB6...sheets_Aa.html

I did check my references. It seems that that Aa had the new type of Lader, it just had higher boosts, which can be maintained to lower altitudes only of course, and so seemingly the high altitude performance is worse than A-1 with new Lader.

However checking the power curves show that the A-1/new Lader has very similiar, practically the same altitude performance.

Quite complicated indeed. I have no knowledge of using different types of superchargers for A-1 engines (if you could point me to some reference that would be great!). Only tech. document I have is Betriebs- und Wartungsvorschrift for DB 601A (Aus. C, October '40), unfortunately, it's not going into further detail (obviously) and it does not distinguish between 601 subversions at all. Do you mean the A-0 by 'old Supercharger'?

http://kurfurst.org/Engine/DB60x/DB6...sheets_A0.html

I always thought Aa was basically slightly modified (re-designed head, reinforced valves allowing higher MFP, different supercharger gear ratio (I am not sure about exact details here) leading to slightly lower FTH traded for more power below FTH.

Originally Posted by Kurfürst

Essentially there is very little difference between these engines at the most common BoB fighting height, the 601A with the old lader is a bit poorer, the others are essentially the same. The Merlin XII is the best for these altitudes.

I agree. Plus it wasn't just the engine power but power to weight ratio which was in favour of the German design. Still very interesting discussion (although OT ). I find it difficult to compare the power of Merlins and DBs as British documents usually mention bHP (brake horse power). The data you posted are correct, of course.

Originally Posted by Kurfürst

The rare Merlin XII and 601N trump all the others, the 601N being the best engine at altitude by far.

The XII was not so rare during BoB, the XX and 601N were later designs and ones to be directly compared in my opinion.

Originally Posted by Kurfürst

I haven't seen the data files myself however, just one post on the board. Can you PM me how to extract these? Thx!

I also only seen it here and I remember the power of DB 601A-1 was set at 1020PS. I'll try to find that data, I have no idea how to extract anything from the game.