| Date: |
Take-off: |
Landing: |
Duration: |
Pilot: |
Flight No.
|
| 22.10 |
1152 |
1206 |
14' |
Sander |
14
|
| 22.10 |
1237 |
1249 |
12' |
Sander |
15
|
| 22.10 |
1306 |
1320 |
14' |
Sander |
16
|
| 22.10 |
1527 |
1557 |
30' |
Sander |
17
|
| 25.10 |
1342 |
1445 |
103 |
Sander |
18
|
| 26.10 |
1533 |
1613 |
40' |
Bartsch |
19
|
| 26.10 |
1713 |
1800 |
37' |
Bartsch |
20
|
| Condition: |
Production
|
|
Engine BMW D II/85259 fully rated
|
|
Wide engine cowling.
|
|
Gills
|
|
Armament: 2 MG 17, two MG 151, without ammunition.
|
|
ETC 501 with intermediate rack.
|
|
Fuselage rack with 4 x locks 50
|
| Full tank: |
without attachments |
G = 3670 kg |
s = 0.70 m
|
|
with ETC 501 |
G = 3720 kg |
s = 0.714 m
|
|
with rack |
G = 3797 kg |
s = 0.72 m
|
|
with 4x50 kg bombs |
G = 3997 kg |
s = 0.725 m
|
| Program: |
1.) |
Level speeds with fuselage rack for 4x50 kg bombs.
|
|
2.) |
Observation of the fuselage rack covers.
|
|
3.) |
Check of the flight characteristics with rack and bombs.
|
|
4.) |
Verification of boost pressure - rpm-relationship.
|
| 1.) |
Due to the continuous
bad weather, level speeds with fuselage rack and bombs were determined
only for low gear and are plotted on the accompanying graph.
Data related to 0 m height values are compiled in the table.
This shows that of the speed loss (7 km / h) from mounting the ETC 501
with intermediate rack, 5 km/h was due to the fixed wheel doors and only
2 km / h was due to the rack.
The fuselage rack with 4 locks 50 results in a loss of level speed of 11
km/h compared to 13 km/h lost from the rack with 4 ETC 50.
|
| Condition |
Speed with combat power
at sea level |
Speed loss
at sea level
|
Initial condition
without conversion kit
complete wheel fairings |
321 mph (517 km/h) |
---
|
Without conversion kit
fixed inner wheel doors |
318 mph (512 km/h) |
3 mph (5 km/h)
|
ETC 501 with
intermediate rack |
317 mph (510 km/h) |
4 mph (7 km/h)
|
Fuselage rack with 4
locks 50 without bombs |
310 mph (499 km/h) |
11 mph (18 km/h)
|
Fuselage rack with
4x50 kg bombs |
293 mph (471 km/h) |
29 mph (46 km/h)
|
| 2.) |
The spring-loaded cover for the right front lock already started to open in the slipstream
during the static run at n = 1800 rpm and stood entirely open at n =
2400 rpm.
The remaining covers remained closed but were, in order to receive proper speed
values, tied closed in flight with rack (without bombs).
An attempt will be made to remedy the issue by strengthening of the cover spring,
or else the hinges must be relocated to the outside.
|
|
|
| 3.) |
With regards to flight characteristics, no objection occurred in normal flight and during air combat maneuvers with bombs.
|
|
|
| 4.) |
The verification of the KG setting according to the chart showed that the engine was delivered with a totally incorrect setting.
For example, the changeover point for the rich and poor adjustment was at n = 2300 - 2400 rpm. (should be 2100-2200 rpm).
The boost pressure – rpm relationship could be straightened out in 1 ½ - working days with 13 static tests.
|
|
|
Wenzendorf, 4 November 1942
Gt/Kl.
|
|
