I don't mean pouring rain but sometimes at a contest you need put up a flight in light rain.  Also, it's not uncommon to get to the flying field early in the morning and there's fog or mist hanging around for the first flight or so.  I've found that IC power is not happy in those conditions and I was wondering if anyone has any experience with electrics in similar conditions.

I don't mean pouring rain but sometimes at a contest you need put up a flight in light rain.  Also, it's not uncommon to get to the flying field early in the morning and there's fog or mist hanging around for the first flight or so.  I've found that IC power is not happy in those conditions and I was wondering if anyone has any experience with electrics in similar conditions.

That's odd -- I've flown in those conditions quite a lot, and hadn't noticed that my IC engine was particularly unhappy.

If you've got that early morning fog that only comes about because the air is absolutely still, then you're going to have serious issues with hitting your own wake -- that's not a power plant issue, though, that's an aerodynamic issue.

If the cause of the performance degradation is the airframe needing more power in still air (which has been noted over and over by the electric guys), then as long as you have sufficient  power you should be fine.