| Date: |
Flight-Nr.: |
Take-off: |
Landing: |
Duration: |
Pilot:
|
| 16.4.1943 |
33 |
1500 |
1600 |
1h |
Mehlhorn
|
| 16.4.1943 |
34 |
1732 |
1820 |
0h48' |
Märschel
|
| 17.4.1943 |
35 |
1555 |
1636 |
0h41' |
Voget
|
| 19.4.1943 |
36 |
1023 |
1107 |
0h44' |
Märschel
|
| Engine BMW 801 D2/20244
|
| Close engine cowl.
|
| Split cowl flaps.
|
| Armament: 2 MG 151
|
| Course control .
|
| Variometer installation
|
| Robotic system.
|
| Glare shield or flame damper for the side exhaust stacks.
|
| Two ETC 50 wing racks with shortened fairing each wing.
|
| 1. |
Stationary engine runs:
|
|
a) with mixing tube (Mischrohr) (Klatte)
|
|
b) with glare shield Fw as per BSK 74090/91
|
|
c) with glare screen Fw as per BSK 74295
|
|
|
| 2. |
Level speeds with flame damper screens and ETC 50 rack with shortened fairing.
|
|
|
| 3. |
Flight characteristics.
|
| 1.) |
a) |
The stationary engine runs with the mixing tube (Mischrohr)
from the firm Klatte had a negative result.
At n = 2200 rpm flames had already appeared, which increased with
increasing rpm and reached about 0.5 m in length with take-off power.
|
|
|
|
b) |
The glare shield
should fulfill its purpose, protection of the pilot from glare from the
exhaust flames, after an extension of ~ 200 mm to the rear.
|
|
|
|
c) |
The Fw-glare screen
was too short in its original condition. The already implemented
extension is still to be checked with a night time stationary run.
|
|
|
| 2. |
As can be seen from the enclosed Graph, the lengthened glare screen results in a speed loss of 15 mph (24 km/h) at combat power.
|
|
|
|
The reduction in level speed with two ETC 50
(with the shortened fairing) per wing has already been substantially
reduced and is 6 mph (10 km/h) compared to 11 mph (18 km/h) when using
the large fairing as per drawing 8-190.862 Z 0 1.
Removing the fairing entirely would be inadvisable, as the tests showed
a further loss of 6 mph (10 km/h) would occur.
|
|
|
| 3. |
Regarding flight characteristics, no complaints were
noted either with the glare shield or with the ETC 50, with or without
fairing.
|
|
|
| Langenhagen, 20 May 1943.
|
|
