Ancient Aviator
Many thanks for your thoughtful reply. It seems clear, although no-one seems to be able to confirm it, that the military Chinook is not operated above 140 knots. I'm sure I have read that its VNE/VNO are higher. My enquiry is thus academic but like an itch I can't scratch. The MOD reply to the House of Lords Select Committee report quotes all met requirements below 140 knots and visibility requirements above 140 knots but only refers to "greater separation (than VFR) from cloud" One of the respondents to this thread says that different figures would apply at 150 knots, possibly in a Puma, but did not say what they are. I shall desist as my enquiry is now really outwith the true scope of this thread.
I was not aware of any 'standard' figures. In my day the humble Skeeter did everything at about 70 knots and the mighty Scout cruised at 100 knots.