From what I remember of a 1-day safety course given by Dick Sandford, the 1.1 seconds is based on how much momentum is in the blades - and something to do with it taking 75hp to push them round one revolution at cruise speed/configuration.
As said before though, this 1.1 seconds is purely if you sit there like a dumbass (to use an americanism) listening to the horn and going "derrrrrrr... what do I do".
Your instinctive reaction at the sound of the horn should be to slam the lever down, correct the yaw with the pedals, pull the cyclic back to 60knts and sort yourself out. (All this assumes previous comments about being within a suitable part of the height velovity curve).
Don't forget in the flare you'll need to check the rrpm with the lever to stop it going off the top of the scale.
If the RRPM by the time you finish doing all this is 75% or above. Great! You just have to land it. If its less ....Game over.
R44 has a lot more mass in the blades = more momentum = more time to think = safer. IMHO.
If you haven't done the Dick Sanford 1 day 'safety appreciation' course - you should. Especially if you're a R22 driver. You'll come out thinking "Holy !!!!!". Very sobering stuff. Including the video of a bloke and his wife plummeting vertically downwards in a Robbo with both rotor blades folded upwards in a vee shape.
You CANT be too careful in these things. They can kill you.
The course had a lasting impression on me - as you can see from the above. But I've never taken safety for-granted since.
Don't have nightmares. Just practice practice practice.
p.s. holly_copter - you weren't the only one to chop the throttle and THEN dump the lever on his first auto. Oops.
