[ganesh7]

You could also say the great innovators did not understand the technology they looted from the Germans. Or the similarities in design, e.g. integration of turbines in the wings, of the Comet and Nazi jet planes are merely coincidental I assume.

[dTal]

The placement of the engines has nothing to do with metal fatigue from thousands of repeated 40,000 feet cruises with a pressurized cabin anyway; no German jet fighter was pressurized, so it's doubtful that they understood the technology either.

Also, the only Nazi aircraft of any type with root-integrated jet engines is the obscure Horton 229 prototype - and apart from that single cosmetic similarity, it has absolutely nothing in common with the de Havilland Comet.

[ganesh7]

Uhuh:

"The Junkers Ju 49 was a German aircraft designed to investigate high-altitude flight and the techniques of cabin pressurization. It was the world's second working pressurized aircraft, following the Engineering Division USD-9A which first flew in the United States in 1921.[1] By 1935, it was flying regularly to around 12,500 m (41,000 ft)."

[dTal]

What on Earth is your argument? Everyone was experimenting with cabin pressurization - that wasn't even the first one. Are you seriously suggesting that that specific aircraft - a pre-war, single-engine piston craft - in any way influenced the design of the Comet?

https://en.wikipedia.org/wiki/Cabin_pressurization#History