Harvard/Texan Prop

[avionic type]

super sonic props

My theory also, the other plane with the same problem was the Viscont [it wasn't called the whistler for nothing] and as props lost their efficency at those speeds many a £ was spent trying to solve the problem but bless em they never did so lets face it the Harvard/Texan was to put it bluntly a "throw away " airplane in its prime the engine /prop combination worked and we were left with the lovely noise, long may it continue .