I am trying to understand whether can there be any correlation between the contra-rotating propellers and the ice accretion over the wing ? For instance, is there any evidence that ice accretion is more in regular propellers when compared to a contra-rotating propeller ?
What are the parameters for icing on the wing?
- air humidity
- airspeed / pressure
The rotation direction of the propeller does not effect any of this parameters. Therefore the propellers rotation direction does not affect icing.
I have not seen any engineering study or even theoritical discussion on this topic. However I can from practical experience say contra rotating props appear to have the same propensity to ice as non contra rotating props.