Captive Technology: German Photographs of Electronic Equipment in a Downed Special Operations Squadron B-24 Liberator – II

This – and the next – page present the 19 pictures in Luftgaukommando Report 1054, for B-24D 42-63792.  The format is identical to that followed in the blog post covering the Luftgaukommando Report for B-24H Liberator Tell Me More:

By scrolling “down” the post from top to bottom, you’ll see images of the two pages in the Report listing the captions of the photos. 

This is followed by a verbatim transcription of the block of the German text in those two pages.  The German text is followed by its English-language translation (in italics) which I transcribed from the MACR.

Then, moving “down” through all the pictures…

Each photo has its caption – in both German and English – below it.  The English-language translations are presented in italics. 

The images and their captions aren’t presented in the same numerical order as in the KU Report.  They’re arranged as if you were moving along the plane (or, er, uh…in this case, what’s left of the plane…) from front to rear.  I’ve also added comments below some captions.

____________________ 

DESCRIPTION OF AIRCRAFT 42-63792, AND PHOTO CAPTIONS

Feindgerät-Untersuchungsstelle 5
RLM GL C-Rü                                                                                                O.U. den 23.4.44
Feldpostnummer: L 50825 FW, Lgp. Brüssel.

Untersuchungsbericht Nr. 5/2021:

Am. 2.3.44 um 23.30 Uhr wurde in Fienvillers (8 km s.w. Doullens) eine Liberator durch Flak abgeschossen.  Von der Besatzung wurden 2 Mann gefangen genommen.

Das Flugzeug war als Sabotagematerialträger eingesetzt und sehr stark zerstört.

Die Typenbezeichnung des Flugzeuges lautete: B 24 D, Ser. 42-63792.  Bemerkenswert an diesem Flugzeug war die FT-Ausrüstung.  Es befanden sich beiderseits des Rumpfbuges die im Bild 1 u. 2 dargestellten Antennen.  Ferner befanden such nachfolgende FT-Geräte an Bord, die grösstenteils bereits durch Kurier nach dem RLM GL C-Rü gesandt wurden:

1.     RT-3 / APN-1
27 Volt
D.C. N.X.S. – 2424
1341 C.R.V.

2.    T-7 / APN-1
110 DB / 25
N.X. – 23763
1237 C.R.V.

3.    Anzeigegerät mit Braun’scher Röhre, vermutlich Suchgerät (Bild 12, 13, 14, 15 u. 16). –
4.    BC-433-C, Ser. Nr. 14506
5.    BC-966-A, Ser. Nr. 45327
6.    BC-454-A, Ser. Nr. 140
7.    BC-455-B, Ser. Nr. 20162
8.    BC-445-B, Ser. Nr. 52370
9.    BC-929-A

Trotzdem bei diesem Flugzeug verschiedene neue Geräte dabiei waren, waren sämtliche FT-Geräte von der Funkmeisterei des Fl.H. Rosiéres weggenommen worden.  Die FT-Geräte mussten erst dort abgeholt und zur Entnahme der Stecker und Kabel wieder in das Flugzeug eingesetzt werden. –

Ferner wurden mehrere Agenten-Empfänger des Musters Miniature Communications Receiver (M.C.R.1.) festgestellt.

Als Anlage zum Bericht werden 18 Fotos übersandt.

Erläutering zu den Bildern:

Bild 1 u. 2:     Antennen an beiden Seiten des Rumpfbuges
Bild 3:           Gerät mit Braun’scher Röhre.  Rechte oben im Bild ist die Kabeleinführung der im Bild 1 u. 2 gezeigten Antennen ersichtlich.
Bild 4:          Kabeleinführung in grösserem Masstab.
Bild 5, 6, 7:  zeigt den Lageert der Geräte RT-7 / APN-1
Bild 8, 9, 10: RT-7 / APN-1
Bild 11:         RT-3 / APN-1
Bild 12, 13, 14, 15, 16: Suchgerät mit Braun’scher Röhre.
Bild 17, 18:   zeigt den Agenten-Kleinempfänger.

Engelhard
Stabsing. Und
Sondering. GL

____________________

Enemy equipment investigation center 5                                             KU 1154
Ministry of the Air Force GL C-Rue                  Local Quarters, 23 April 1944
Field postal No L 50825 FW
Air District Post Office Brussels

Investigation Report No 5 / 2021

On 2 March 1944 at 2330 a Liberator had been shot down by anti-aircraft over Fienvillers (8 km southwest of Doullens).  Two members of the crew had been captured.  The plane was equipped as sabotage material-carrier and therefore very seriously damaged.

The type markings of the plane were as follows: B 24 D, Serial No. 42-63792.  This plane was equipped with remarkable radio equipment.  There were aerials on both sides of the front of the fuselage as pictures 1 and 2 show.  Further, there was the following radio equipment on board, the greatest part of which has been sent by messenger to the Ministry of the Air Dorces GL C-Rue.

1.     RT-3 / APN-1
27 Volt
D.C. N.X.S. – 2424
1341 C.R.V.

2.    RT-7 / APN-1
110 DB / 25
N.X. – 23763
1237 C.R.V.

3.    Indicator-set with Bruan’scher tube, probably search-equipment (see picture 12, 13, 14, 15 and 16)
4.    BC-433-C, Ser. No. 14506
5.    BC-966-A, Ser. No. 45327
6.    BC-454-A, Ser. No. 140
7.    BC-455-B, Ser. No. 20162
8.    BC-445-B, Ser. No. 52370
9.    BC-929-A

Though this plane was equipped with different kinds of new radio equipment, all radio equipment had been taken out by the radio office of the Air-base Rosieres.  The radio equipment had to be obtained from that office, and for the purpose of the removal of the plugs and cables had to be installed again into the plane.  Also, several agent receivers of the type “Miniature Communications Receiver (M.C.R. 1)” were found.

Enclosed in this report 18 photographs.

Photo explanation.

Picture 1 and 2:     Antenna on both sides of the front of the fuselage.
3:     Equipment with Bruan’scher tube.  In the right upper corner of the picture the cable installation of the antenna (shown in picture 1 and 2) can be seen.
4:     Cable installation on larger scale.
5, 6, 7:     shows the location of the equipment RT-7 / APN-1
8, 9, 10:   RT-7 /APN-1
11:            RT-3 / APN-1
12, 13, 14, 15, and 16     Search equipment with Braun’scher tube.
17 and 18:     Shows the Miniature-Communications-Receiver.

Enclosures:

Instructions for the
“Miniature Communications Receiver”
and 18 photographs.

Signed: Engelhard
Staff-Engineer and Special Engineer

____________________

Photos: Crash Site, APN-1 Antenna, and BC-929-A “Rebecca” Radar Interrogator Unit

____________________

These three un-numbered images show the scope and scene of the plane’s crash.  Most of the airframe and wings have been destroyed (the tail and left wing broke off during the crash) but ironically, several components of the plane’s special electronic equipment, situated in the central fuselage and nose, survived relatively or completely intact.  These have been extracted from the fuselage and placed in front of the wreckage. 

____________________

Bild 1 u. 2:     Antennen an beiden Seiten des Rumpfbuges

Picture 1 and 2:     Antenna on both sides of the front of the fuselage.

Bild 1 u. 2:     Antennen an beiden Seiten des Rumpfbuges

Picture 1 and 2:     Antenna on both sides of the front of the fuselage.

Bild 3:           Gerät mit Braun’scher Röhre.  Rechte oben im Bild ist die Kabeleinführung der im Bild 1 u. 2 gezeigten Antennen ersichtlich.

Picture  3:     Equipment with Bruan’scher tube.  In the right upper corner of the picture the cable installation of the antenna (shown in picture 1 and 2) can be seen.

Bild 4:          Kabeleinführung in grösserem Masstab.

Picture 4:     Cable installation on larger scale.

Comments for Photos 1, 2, 3, and 4: Close-ups of nose-mounted external receiving antenna associated with the APN-1 radar altimeter, and, the interior electrical connection of an APN-1 antenna within the fuselage.  Notably, the nose-mounted BC-929-A “Rebecca” Radar Interrogator unit and its attached cables (in photo 3) are completely intact. 

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Bild 12, 13, 14, 15, 16: Suchgerät mit Braun’scher Röhre.

Pictures 12, 13, 14, 15, and 16: Search equipment with Braun’scher tube.

Bild 12, 13, 14, 15, 16: Suchgerät mit Braun’scher Röhre.

Pictures 12, 13, 14, 15, and 16: Search equipment with Braun’scher tube.

Bild 12, 13, 14, 15, 16: Suchgerät mit Braun’scher Röhre.

Pictures 12, 13, 14, 15, and 16: Search equipment with Braun’scher tube.

Bild 12, 13, 14, 15, 16: Suchgerät mit Braun’scher Röhre.

Pictures 12, 13, 14, 15, and 16: Search equipment with Braun’scher tube.

Bild 12, 13, 14, 15, 16: Suchgerät mit Braun’scher Röhre.

Pictures 12, 13, 14, 15, and 16: Search equipment with Braun’scher tube.

Comments for photos 12, 13, 14, 15, and 16:  These are external and internal views of the BC-929-A Rebecca Radar Interrogator.  The phrase “Braun’scher Röhre” (Braun’scher tube) is German for “cathode ray tube”, the first such device having been invented by a Dr. Karl Ferdinand Braun in 1897. 

The remaining photographs are presented on the next blog post…

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