Re: Some enlarged and "tweaked" known photos of Ar 234s

[Stig Jarlevik]

Originally Posted by Karoband

Hi Stig,
I
cannot remember (Senior moment!) why I thought it was ES.
Jim

No worries Jim
I suppose ehhhh welcome to the Club.....
Cheers
Stig

[Karoband]

Thanks, Stig.

http://forum.12oclockhigh.net/album....pictureid=1623

142. Smith & Creek, Ar 234 Blitz, (Classic, 2022), on p. 212, caption this photo as, "Hptm. Josef Regler's Ar 234 B-2 F1+MT, W.Nr. 140173 after crash landing at Salgerdorf on 22 February 1945 ... ."


http://forum.12oclockhigh.net/album....pictureid=1624

143. In the afternoon of 22 February 1945, fourteen Arados of KG 76 took off to bomb enemy columns in the Aachen area in shallow dives. At 17:35 hours, 1st Lt. David B. Fox in a P-47 of 391 FS/366 FG claimed a "Me 262" that "bellied in" 10 miles north-east of Aachen, but film from his gun-camera showed that it was an Ar 234. Hptm. Regler, Lukesch's replacement as staffelkapitän of 9./KG 76, made an emergency landing just inside German lines near Selgerdorf. Regler was safe, but the first Arado Ar 234 to fall into Allied hands was captured the next day.
"The aircraft was examined briefly and dismantled ready for shipment to the UK, while still under fire from the Germans, who were probably attempting to destroy it. It was found to be only slightly damaged," Creek & Forsyth, p. 125 quoting UKNA/AVIA 6/9212: Ar 234 Jet-Propelled Bomber, Report No. 2324, AI(g), 27 March 1945.


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144. The captured Arado was Ar 234 B-2 W.Nr. 140173 "F1+MT" (yellow "M") of 9./KG 76. This photograph shows how operational units of KG 76 used sprays of off-white, probably available RLM 76, to make their Arados less conspicuous in winter. Note the intact turbines, jettisoned hatch and almost totally smashed forward windscreen.


http://forum.12oclockhigh.net/album....pictureid=1626

In this photo the jettisoned hatch has been replaced but the smashed windscreen and collapse of the forward instrument panel is obvious.


http://forum.12oclockhigh.net/album....pictureid=1627

146. While the first intact Jumo 004Bs were of special interest and are missing in this photograph taken at Farnborough, also of interest would have been the PDS gyroscope, the Patin automatic pilot and BZA bombsight. Moreover, a staffelkapitän's aircraft would also have had the FuS An 730 Freya-Egon navigational device for blind flying that amazed American gunners at Remagen seeing Arados diving out of the clouds, right over the Ludendorf Bridge. Unfortunately, the smashed windscreen may indicate that German troops had removed or destroyed those prizes.
Note the damage to the the starboard wing that was not there when captured.

[Karoband]

http://forum.12oclockhigh.net/album....pictureid=1628

147. In August 1943, it was, in theory, a good idea to replace the two Junkers Jumo 109-004 B-0 turbojets on the Arado Ar 234 with four BMW 109-003 A-0s. While the BMWs had yet to produce their promised 800 kg. of thrust compared to the 900 kg. of the Jumo, the BMW weighed only 623 kg. compared to 745 kg. of the Junkers. That meant that an Ar 234 airframe could just accommodate the weight of four 003s, giving a total thrust of 3200 kg. for an engine weight of 2492 kg. compared to a thrust of 1800 kg. for a weight of 1490 kg. of two Jumos. "Preliminary performance figures for the project looked promising, including a maximum speed of 860 km./h (534 mph) at 4000 m. (13,000 ft.) and a range of 1,470 km. at 12,000 m. (39,370 ft.)," Smith & Creek, Ar 234 Blitz, (Classic, 2022), p. 150. This would make it faster than the Me 262 but it would need reliable engines, a pressurized cockpit and a new tricycle undercarriage to carry the weight of engines and cockpit. There was also a drawback. The BMW 003 was designed to run on B4 87-octane aviation fuel.
Two configurations using Ar 234 Anton airframes were designed by Arado to test the four engine concept. The V6 (W.Nr. 130006; "GK+IW") would have two individual, separated nacelles under each wing, while the V8 (W.Nr. 130008; "GK+IY") would have paired nacelles. The V8, seen here under construction, was the first of the two to fly on 2 February 1944.


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148. This screenshot shows that the V6 and V8, like the other Antons, used tubular jacks to lift the aircraft so that the take-off trolley could be placed beneath it.


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149, Arado's test pilot, Flugkapitän Johan-Ubbo Janssen, immediately encountered problems. For the V8, the most serious concerns were the Henschel-built, unreliable fuel pumps that emptied fuel tanks at uneven rates causing great shifts in the centre of gravity, (Pawlas, p. 85) and the fact that the 003s regularly flamed out and could not yet be restarted in the air.


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150. The final flight for the V8 was on 6 May 1944. Persistant problems with fuel pumps, throttles, landing flaps,hydraulics and skids made this aircraft too dangerous to fly. Janssen aborted this final flight, (Pawlas, p. 120)

[Nick Beale]

Originally Posted by Karoband

Thanks, Stig.

crash landing at Salgerdorf on 22 February 1945 ... ."

… made an emergency landing just inside German lines near Selgerdorf

Two typos. The crash location is spelled Selgersdorf (with an ‘s’ in the middle): https://de.wikipedia.org/wiki/Selgersdorf

[Karoband]

Thanks, Nick. Just checked. Both typos are mine. And there is a thread in TOCH on the spelling!

[Karoband]

forum.12oclockhigh.net/album.php?albumid=73&pictureid=1632

151. The Arado Ar 234 V6 (Wn.Nr. 130006; "GK+IW") first flew on 25 April 1944 using four BMW 003 A-0 turbojets in four separated nacelles. Ubbo Janssen reported that he was constantly throttling to control the engines and that they could not be restarted in flight, Pawlas, p. 110.


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152. As one of its innovations, the V6 had radio telemetry of each exhaust temperature, Pawlas, p. 122.


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153. Problems with the V6 included inconsistent fuel flows to the engines and swings in the centre of gravity due to uneven emptying of the fuel tanks. At 7000 m. the Henschel pumps could only inject enough fuel for idling and the aircraft became uncontrollable and went into a spin on 30 May 1944, Pawlas, p. 166.


http://forum.12oclockhigh.net/album....pictureid=1635

154. The final straw for Ubbo Janssen came on 1 June 1944. After about ten minutes, all four engines cut out at 500 m. over a wide forest. He managed to relight number two and, losing height, made a quick notlandung in the first open field he saw. In his report of 14 June, he summed it up:
"Abschliessend ist zu sagen, das die BMW-Triebwerke in dieser Form nicht erprobungs reif sind. Das Risiko ist untragbar Geworden, Pawlas, p. 154. Neither the V6 nor the V8 flew again. However it had been concluded that the paired configuration was superior.

[Nick Beale]

Originally Posted by Karoband

Thanks, Nick. Just checked. Both typos are mine. And there is a thread in TOCH on the spelling!

Only trust maps!