The AR-234C was the fastest operational jet propelled aircraft to see service in World War II (542 MPH/873 KM/H for the C-3 variant). They were also working on various fighter variants of this aircraft (Both Day and Night Fighter). Only one plane of the C-3's built was equipped with the tail guns but they all had the twin forward firing cannons ((1) MG151/20 model C and (1) MG151/20 Model D). As I am currently leafing back through the book, I can't find where it 'expressly' states why the change from two to four engines (Although I have read elsewhere that it was due to the Me-262) but they state that Arado was always interested in making a four engined version (partly due to the four engine jets on the drawing boards at the time).
A caption for a photo on pg. 92 of the book listed below states, ' The Ar-234 was the first aircraft in the world to be powered by four jet engines. Some considered it to be overpowered in this form but, with careful handling, it would have been a formidable opponent. The Ar-234 reconnaissance pilot, Erich Somer, was to comment:"Give me any power for climbing and acceleration. For adjusting to the Mach capability of my airframe, I can look after myself!" '
If you are really interested in this plane (The Ar-234 series), I can't recommend the following book enough:
Monarch - 1
Arado 234 Blitz
By Smith & Creek
ISBN: 0-914144-51-0
Published: 1992
Monogram AviationI recommend you try and find this at one of the 'out of print' book sites online (I believe someone posted some links for those in the O'Club not to long ago).
Addenda: BTW RIP, the Ar-234 sideview (second from bottom) in your planform picture, is a forward swept pylon on top of the fuselage with a small radar dish on top. i.e.- what you see there is a Luftwaffe AWACS bird.
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Sundog
VMF-111 Devildogs'Criticism is always easier then craftmanship.'
[This message has been edited by Sundog (edited 01-25-2001).]