It’s not a paper airplane. Planned engines can be added.
The IA-37 was functional, it had many hours of flight testing.
YAK 141 was not really completed either, in fact the game model is too far from the real prototype, however Gaijin finished it as planned.
After a quick look, its a complex matter…
Most of the pictures we see belong to the same glider/test-unit/prototype this one was made of wood and lacked engines, although its configuration was to be exactly the same as the real plane. When it comes to the real prototype, i think the claim comes from the book “Alas de Peron” by Ricardo Burzaco, it claims that the program was terminated with the prototype in a “advanced state of construction”.
If you ask me, i really dont know, i guess we can make the compromise since its a quite unique design?
there is guy also on the forums proposing a so called “Rio de la Plata” tech trees that is a combination of argentine vehicles, brazilian vehicles , Uruguayan vehicles and some bolivian ones that in his air tree he included something that he calls the “IA-37 5th stage” at 8.0 so i imagine he added the one with only 1 engine
During 1955, a metal prototype was being prepared at the IAME, which would be equipped with 1 x 1832kg Rolls-Royce Derwent 5 turbojet. Received the definitive designation of IA-37 “Delta Wing”
The installation of a Martin Baker D/Sk/2511 ejection seat had been planned, and two 20 mm Hispano Switzerland 804 cannons on the cockpit floor. It would be powered - as planned - with two Rolls Royce Avon turbines.
Source: Diego Horten, edition number 615 of AEROESPACIO Magazine.
Apparently the final version IA-37 is the metal one with a Derwent turbine that is seen in many photos, used as a “laboratory” by Horten.
The supersonic version with two reactors would be the IA-48 project, which was expected to fly in 1961.
to be honest with all the delays by the time it would come into production it would of been already outdated, a shame, Horten´s design are very intresting and also horten was probably easier to work than Tank, would of been cool if the IA-48 would of been made, at least a prototype
Now that i think about it , while we dont see the back, would that weird bulge under the fuselage that its only present on the normal cockpit version be some sort of space they did for the engine? i ask because its missing on the prone cockpit version
Do you think Horten tested his laboratory plane from 1954 to 1960 using a tugboat throughout this period? I can’t help but imagine the number of gloster engines available in those years.