| Condition: |
| D-9 Series condition |
| Methanol equipment with 160 ltr. Nozzle with 0.45 atu jet pressure. |
| Surface primed and polished. |
| Armament: 2 MG 131, 2 MG 151. |
| Operable landing gear doors. |
| Radiator flap in front of the air intake fixed in flush position. |
| Rücköl vom VDM – Regler zum Sauganschluss des Luftschraubenreglers geführt. |
| Program: |
| Determination of level speeds using take-off power: |
| a). | with increased supercharger pressure |
| b). | with methanol injection. |
| Results: |
| The two possibilites for increasing output can be examined through simultaneous testing. |
| a) Increase of take-off power on n = 1900 PS by boost pressure increase and.
b) Methanol injection during take-off power with boost pressure increase |
| Speeds were no higher than Werk Nr. 210001, which did not have special surface treatment.
The influence of a smoothed surface is checked by the treatment of 210001. |
| The speed spread between combat and take-off power with this machine falls ~12 to 13.5 mph (20 to 22 km/h) under and ~15.5 to 17 mph (25 to 28 km/h) over full throttle height. |
| Wie aus der Auftragung ersichtlich; entsprach die Zuordnung bei den Flügen 1 und 2 am 12. und 14.10. nicht ganz den Soll werten.
For the 1900 PS – power, the boost pressure below full throttle height, pLC = 1,75 ata, lay too high and for methanol operation with pLC 1,77, somewhat too low.
Therefore, the speed increases of ΔVa = ~12 mph (20 km/h) (for 1900 HP) and ΔVb = ~20.5 mph (33 km/h) (for methanol) are to be used.
After repeated adjustment, the maximum boost pressures lay in the correct range during flight 3 on 14.10, i.e. 1.7 ata for 1900 PS and 1.8 ata for methanol. |
| Based on the flight results, and allowing for variations, it can be stated that a gain in speed of 10 to 11 mph (16 to 18 km/h) is obtained below full throttle
height using take-off power increased to 1900 PS.
20 ½ to 21 ¾ mph (33 to 35 km/h) can be obtained using MW 50 installation, with the 160 Ltr. - nozzle. |
| The supercharger air temperatures were reduced ~ 35°, with the change from 1900 PS power to methanol operation. |
Langenhagen, 19 October 1944
Gt/Schw. |
| Increased Boost | Methanol Injection |
| Sea level | 359 mph | 367 mph |
| 5,905 feet (low gear full throttle height) | 383 mph | 390 mph |
|
