Regarding the helicopters in sand pictures a reader writes:
Credit: Unknown, collected from an email.
Yikes. If there’s enough sand grains in the air to be doing that, think about what the turbine engines are sucking in — and they move at a much higher speed than those rotors.
My Arts Editor wondered if it was possible to coat the blades in something that won’t spark, but I opined that this would add to the weight of the vehicle – not a good idea.
