From Tony Gillett
In the story on dangerous ice build-up on aircraft (30 April, p 17), Paul Marks stated that “as ice accretes on the wings and tail, it changes their shape, creating drag. That, in turn, reduces the airspeed which is needed to generate lift – leaving the aircraft at risk of stalling”.
This wasn’t quite right. Ice build-up does increase drag, which slows the aircraft, while also raising the airspeed at which a stall occurs, thus creating a double whammy resulting in increased stall risk.
Billericay, Essex, UK
