philbky
Thanks for the info.
I remember the -700, -800 and also the X-11 from my time at Hurn (1969-1973)
Re. the Dee Howard conversion.
I was talking to Ed Strongman, the CAA test pilot, at the time he was doing the Tay 1-11 testing at Teterboro. (We were testing the L188 at Macon GA).
He said that there had been a Vmca problem due to the higher thrust and increased thrustline with the Tay installation. They increased the area of the rudder and all was well.
The problem came when they went to BAe for structural calculations of the increased rudder loads on the rear end. BAe wanted about 1.5 million just to start looking at the calculations, even though everyone agreed that the 1-11 rear end was built like the proverbial brick outhouse.
This is where the 146 sales effect may have come into play.
IIRC Dan-Air had signed up for a number of conversions and also other airlines were interested and this would have delayed fleet replacement.