Bf109 test data

[Robo.]

Originally Posted by *Buzzsaw*

The below document, dated October 1940 by the WWII Aircraft Performance site is from the manual I have already posted,

(http://www.scribd.com/doc/32387854/Handbuch-DB-601-A-B)

...and indicates the DB601A and B had both variants of superchargers installed, both the 'Neuer' and 'Alter' lader, but the limit for both was 1.40 for takeoff and 1.30 for 5 minutes.

Yes I am familiar with that document but as usually, it does not specify the subversion of DB 601A (e.g. A-1 or Aa) and is rather generic (includes all A dn Bs, difference being the gear ratio). It actually mentions the details about the new supercharger, like 1mm Drahtstaerke) and different FTH at Hoehenlader as result. My understanding until now was that the new s/c column is for the A-1 and old s/c is for the Aa, hence the FTH difference. I see there is more to it so I am interested in details - how many engines have had the old s/c fitted and what was the technical difference and so on.

I simply don't know so I did not consider the various supercharger combinations at all in my original post.

It is obvious though that in case we have the Aa modelled, the FTH is wrong.

Originally Posted by *Buzzsaw*

By the way, can anyone shed any light on the methodology to convert the German method of measuring boost, ie. 'ATA' to 'Ft/pounds', or 'Inches of Mercury'.

1 ata = 1kg/cm^2 = 14.2 lbs/in^2 = 28.96 inHg