Freebird
Master Sergeant
Why do you think that "aerodinamic design" would've act prohibitevly against mounting radial engines (like the Taurus I propose)?
I'm not really an expert, but if substituting Merlins was so difficult, would not radials be even more prohibitive?
At low level performing better than its rivals the Whirlwind was let down by production problems.
200 units were order but in the end only 114 saw completion the Peregrine engines were not as reliable as the Merlin and Rolls Royce production concentrated mainly on these so delivery times fell behind. It was proposed that Merlins be fitted into the Whirlwind but the airframe alterations need were prohibitive.
Sources: Fighters by William Green Gordon Swanborough Reap the Whirlwind by Tony Buttler
The problem was not about finding alternative engines, it was the design changes