Hello,
I'd be surprised if it it took less than six, even with a large team of draughtsmen.
Wow! Only 102 days to design/create a complete sophisticated plane like the Mustang, and 6 full months only to make draws for a soapbox like a Yak-1? Even with a large team of draughtsmen and about ¾ europeans metric engineers from Sikorsky-Kartvelli-Seversky design bureaus.
There is something "strange" in your estimations I think.
A few years ago I worked for a British company that had an American parent company, they sent us the drawi….etc
….It's a very big deal and not one that's particularly "fun" or profitable.
Even ten years later that design is one of the least well regarded inside the company
Your experience in itself is indisputable, and there is nothing to discuss about. But how far could it be applied to the Yak-1/7/9
airframe conversion from metric to imperial system?
Ask any design engineer: the worst job in the world is working on stuff that isn't your own.
Give me a clean sheet of paper and a set of specs every time. It's far less hassle.
Time is the key factor, you're right. How hassle is it or not is an insignificant factor.
What-if soviets have had ready Yak-1 with Merlin XX or Allison engines in the early 1942 spring, after the good thrashing got by the allies in the North Africa or Pacific TOW?
I have no doubt on what would have been said to you from Jeffrey Quill or "Chuck" Yeager about the use of your
clean sheet of paper, if you were a Hurricane or P-40 designer/supporter/representative, after comparative trials in Moscow (between soviet 109E3, F2, merlin engined Yaks and Hurricanes, and Allison fitted P-40's and Yaks...). And so for the Kiwis, the "Aussies", Free-frenchs, Afrikaners, Flying-dutchmans, Polaks, Aliens….
In final worlds the customer-pilot is the King. He decides. And j'm not persuaded that you will convince him that your own project:
-would be far superior
-faster available in front line units,
than a join-ventured Yak 1A or 7A (america) assembly line.
Regards