Manxmann
Captain
Flight distance : 1178793 ft
Australia
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Bashy Posted at 1-3 20:01
I had prop icing, was around 1C to 0C at 10m, i flew on a clear day but there was some light fog, it was sunrise time, i sent it off but for reasons i canot remember now, i brought it back in and landed it, and it was then that i noticed icing on the props and in the legs too so it was deffo colder and humid up there. I work on the rule that every 100m in height, the temp drops 1C, I also read somewhere that for props to ice up, it does not have to be negative C, the pressure that the props cause makes them cooler, have i got that part right, i could have missred it or misunderstood it lol
Standard Adiabatic Lapse Rate is 2C per 1000ft, so you are not far off the mark.
If the props were icing -- had you noticed a change in performance ? The aerodynamic of the prop was changed because of a change in profile plus there would have been some small increase in weight. |
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