PPRuNe Forums - View Single Post - AW139 G-LBAL helicopter crash in Gillingham, Norfolk
Old 21st Mar 2017, 22:04
  #844 (permalink)  
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Non-PCPlod - the Vmini will be mainly due to the inacuracies of thec pitot.static system since very few give IAS below 40 or so kts with any reliability and some airspeed tapes dont have any figures below 30 kts.

Since that speed is required to fly the aircraft accurately (notwithstanding what a good AP is allowed to do using other sensors), it is no surprise that they don't test or certify it in the low speed instrument regime.

It's not that the aircraft can't do it because we all know they can but no-one is going to risk the litigation when someone spears one in flying in cloud at 30 kts by saying it is safe to do so.
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