Brantly B2
For the 'Earl.'
The machine I owned was G-AWDU which I purchased late 1970s for exactly £2000! It was the injected B2B version. I only flew her for around 20 hours before it was sold, but the type was smooth to fly with well harmonised controls and adequate power. Interior headroom is tight for a six footer. The rotor blade cabin clearance was certainly marginal, but I've not heard of any incidents resulting other than the Graham Meyrick accident when the type shed one blade at Kidlington. A second blade entered the cabin at head height resulting in the fatality.
As is fairly normal, th PFM specifically excludes using collective to slow the rotors, but I imagine even with the double 'flapping' hinges, the higher blade angle would increase the cabin clearance until at lower rrpm when the disc was prone to blade sailing.
Elfan Ap Rees will have much more personal info on handling having operated the type for many years.
Regards to all. Dennis Kenyon.