I first read of Gardermoen many years ago in a book by William Stevenson called the Bormann Brotherhood who said to the effect that the airfield was built by the SS in a forrest. Stevenson himself was a WW2 Royal navy aviator and naval intelligence officer. He was quite specific that the airfield was built and operated by the SS.
The illustration attached is a WW2 vintage illustration of the He-227 B-5. These aircraft were built by converting older He-177 A-0 airframes with new tails (resembling the Manchester's tail) with longer span wings sporting four engine nacelles. They were powered by the high altitude Jumo 213E engines used on Dora fighters.
My first inclination like that of Juha would be perhaps these aircraft were the He-227 B-5 but these only had a range of 4,500 miles. Erhard Milch made a passing remark in his memoirs that there was a proposal to fly land planes for an attack on New York via a refuelling stop at Greenland. That still does not tally with the 7000 mile range mentioned by the NY Times article.
The only aircraft however which might fit the 7000 mile range described in that NY Times article was perhaps the Horten Ho XVIII. The Argentines built a scaled down version of the Ho XVIII called the Naranjero.
Is it possible that Hienkel was building the Horten Ho XVIII near Oslo?
I am not at all certain that it was a Hienkel factory near Oslo which the RAF bombed, but I do recall reading online somewhere a claim that it was a factory building a Hienkel jet bomber. I am scratching my head now trying to recall where I first read that claim and from whom.
I have read a claim that the Horten type Ho XVIII was developed at the Erzgebirge area which is known more for it's WW2 Radium / Uranium mines and the so called Nazi Bell device. There were three luftwaffe aircrfields within the area of the massive Erzgebirge underground complex.
Relating this back to an earlier linked question of this thread about the aircraft factory bombed near Oslo by the RAF has anybody got any further clues what aircraft exactly might have been built near there?
Only the SS Kammler Fuhrrungstab had the freedom to build any projects like the Ho XVIII, prototype or otherwise later in the war. Why bomb an aircraft factory in Norway so late in the war? (late April 1944)
(Apologies, I followed a link from a related thread and answered it here.)
http://www.ww2aircraft.net/forum/aviation/messerschmitt-me-264-heinkel-he-277-a-7540-5.html