DB-60X manifold pressure handling

[Friedrich-4B]

As for,

"Who's to say that with this experience in racing engines, that DB hadn't designed the supercharger to allow for future power increases, including the possibility of using more extreme valve timing overlap? The chances are excellent that the DB 601E and DB 605, and their superchargers, were designed with the benefit of experience drawn from the DB 601 R. series. "

 

You're going to have to buy more books. With a FTH of only 6.5km the blower in 1942 was just about adequate. Set is relation to the knowledge in 1942 that Boeing were developing a bomber (B29) that would fly at 16km and be over Germany in 1943, can you imagine the panic in the German high command? Clue, they had no aircraft that could even fly that high and not even one on the drawing board at that stage.

 

True, yet in 1942 the Luftwaffe's combat operations were dominated by the fighting in Russia where the average combat took place below 10,000 feet, same with the desert campaign; in Western Europe the USAAF's B-17s & B-24s were still in early deployment and few of the RAF's operations were above 20,000 feet, so while the engine manufacturers and high command were in a panic about the prospects of the B-29, they were still having to build fighters to cater for the realities of combat where a blower that had a FTH of 6.5 km could cope.

Nor does all of this explain why DB designed the 601E and DB 605 to have an overlap of 105° - having designed the 601A to have only 42° - and redesigned the supercharger accordingly.

 

That the Db605 and late 109's were as good as they were was something of a miracle, needed the bigger 603 blower and needed mw50 to stay competitive. Be under no illusions, the clock was ticking from the day the Japanese bombed Pearl Harbour. Chuck in Stalingrad and Diamler Benz were playing catch up to achieve height and speed in aero engines from then on.

 

All very true; fact is until the Ta 152H Germany didn't have a fighter that was truly capable of flying and fighting at 40,000 ft plus.

 

Db also had "racing" experience with inverted V12's in Auto Union race cars in the early '30's.

 

You mean Mercedes-Benz had racing experience against Auto Union, don't you? The superchargers used were Roots type generating up to 1.83 ata; AFAIK none of the cars used hydraulic superchargers.

[NineLine]

Just as a reminder:

 

Please do not convert these thread to a discussion. I need only facts, texts, docs, etc... :)

[MiloMorai]

Db also had "racing" experience with inverted V12's in Auto Union race cars in the early '30's.

 

[Altflieger]

Apologies over auto union engine, crossed wires and trying to beat the clock before being logged out again(!).

Yes dear Yoyo, disappeared some time ago... possibly gone fishing with Ilya?

[NineLine]

Apologies over auto union engine, crossed wires and trying to beat the clock before being logged out again(!).

Yes dear Yoyo, disappeared some time ago... possibly gone fishing with Ilya?

 

He is responsible for a number of PFMs, I am sure that is keeping him quite busy....

[Friedrich-4B]

Just as a reminder:

 

:music_whistling: No problem; I was mainly responding to JtD's query about why DB chose to handle the low altitude supercharging the way they did...:pilotfly: