To post a thing or two about the Bf-109F1/F2.
1st, the power graph for the BD-601N, that shows the 'Steig kampfleistung' being at 1,25 ata (max) and 2400 rpm; the 'Start Notleistung' (1 min here) at 1,35 ata (max) and 2600 rpm. Respective power at altitude being 1050 PS at 4850m abd 1175 PS at 4900m.
However, the Kennblat for the BF-101F1/F2 says that 'S. Notleistung' is allowed for 3 minutes there, with the manifold pressure increased to 1,42 ata. The manifold pressure for the 'Steig Kampleistung' increased to 1,30 ata. Max speed being 615 and 595 km/h, respectively; see the 'Wirklich' (='True') arrow:
This is not yet as far (fast) as the Bf-109F1/F2 was capable for. The over-revving to 2800 rpm was allowed, that gave another 10-15 km/h at rated height. That means 625-630 km/h.
We still don't know what power was available for the F1/F2, though. The footnote from the latest doc might lead as to the answer. It reads, roughly, that when Kampfleistung is at 1,25 ata instead of 1,30 ata, the power is down by 4,5%. For the Notleistung, when the manifold pressure is at 1,35 ata vs. 1,42 ata, the power is down by 6%. Going backwards, the power should be around 1100 PS on Kampfleistung and 1250 PS on Notleistung. The cost was probably several hundred meters in the rated altitude vs. what the graph shows us, ie. the rated altitude was at, roughly, 4500 m for those power settings, no ram.
The over-revving helped considerably for high altitude power and performance, but I still don't know for certain the power available for 2800 rpm, that was allowed at and above rated altitude. My guess is that some 100 PS would be the gain at ~5 km ( no ram), ie. some 1270 PS there.
1st, the power graph for the BD-601N, that shows the 'Steig kampfleistung' being at 1,25 ata (max) and 2400 rpm; the 'Start Notleistung' (1 min here) at 1,35 ata (max) and 2600 rpm. Respective power at altitude being 1050 PS at 4850m abd 1175 PS at 4900m.
However, the Kennblat for the BF-101F1/F2 says that 'S. Notleistung' is allowed for 3 minutes there, with the manifold pressure increased to 1,42 ata. The manifold pressure for the 'Steig Kampleistung' increased to 1,30 ata. Max speed being 615 and 595 km/h, respectively; see the 'Wirklich' (='True') arrow:
This is not yet as far (fast) as the Bf-109F1/F2 was capable for. The over-revving to 2800 rpm was allowed, that gave another 10-15 km/h at rated height. That means 625-630 km/h.
We still don't know what power was available for the F1/F2, though. The footnote from the latest doc might lead as to the answer. It reads, roughly, that when Kampfleistung is at 1,25 ata instead of 1,30 ata, the power is down by 4,5%. For the Notleistung, when the manifold pressure is at 1,35 ata vs. 1,42 ata, the power is down by 6%. Going backwards, the power should be around 1100 PS on Kampfleistung and 1250 PS on Notleistung. The cost was probably several hundred meters in the rated altitude vs. what the graph shows us, ie. the rated altitude was at, roughly, 4500 m for those power settings, no ram.
The over-revving helped considerably for high altitude power and performance, but I still don't know for certain the power available for 2800 rpm, that was allowed at and above rated altitude. My guess is that some 100 PS would be the gain at ~5 km ( no ram), ie. some 1270 PS there.
