ORIGINAL: Molar mender
ORIGINAL: pilott28
am reaching back, but I believe in early times, there was a 1 to 1 thrust to weight ratio rule applied to all turbine aircraft under 55 pounds that was eventually replaced by the 200 mph rule. I'm sure someone here will remember. This was just prior to the effort to put speed limiters on all turbine aircraft that fortunately never made it past the EC.
As I remember the original rule stated "....thrust cannot exceed .9 to 1" before the 200mph limit was made.
Under the older rules, you actually had a choice : (a) .9 to 1 thrust to weight, OR (b) 200 mph. In other words, if you kept to .9 to 1 then it was OK to bust 200 mph, but if you exceeded .9 to 1 you had to keep the speed down to 200 mph max.
Gordon