huv wrote:
Our G109B composite prop is somewhat eroded and we think it is by rain. But we do not know for sure and I do not really have a good source for this.
Probably chemical reasons, like acid rain for composite frame over cities/land or salted water for seaplanes over lakes/oceans?
Sports composite cars are left all year around outside in rain+sunshine, at best you will loose the paint or at worst the whole car 
I doubt any of that is mechanical
I try not to take off in rain with composite or wooden propellers, and generally I like to keep tip speeds down in rain (by limiting rpm). Our G109B composite prop is somewhat eroded and we think it is by rain. But we do not know for sure and I do not really have a good source for this.
ivark wrote:
Thats weird, I had a SF25C with 65hp engine and it took off and flew quite OK in the rain..
You have 20 more hp than the SF25B I flew.
Thats weird, I had a SF25C with 65hp engine and it took off and flew quite OK in the rain..
Ultranomad wrote:
In particular, I have seen such a warning in the flight manual for SF-25 Falke motor glider (also known as Slingsby T61).
I have flown an SF25B and wasn’t able to maintain altitude in rain with full power. So yes, rain can bring an aircraft down :-)
A good effect of a heavy rain is that it tends to be less crowded and faster/easier to get direct clearances!
We have flown our Skylane in very very heavy rain. And we have departed in (singular) very heavy rain. It does make some noise (the rain) and sometimes the aircraft whistles. We view it as interesting, but not hazardous by itself. It cleans the bugs off the leading edge. Sometimes the heavy rain is accompanied by high/changing winds together with turbulence. That masks the more subtle effects the wing would show. If any. Leaving in high rain will make you very happy to have a high wing aircraft. (Because of the difficulty of loading the airplane on the ground.)
hD study/article on how V-tail work well for flying in rain
Dr Google is your friend there. So well proven that the V tail flies much better than straight tail in the rain. Performs better in cloud also. Sweet spot is 250’…..
BeechBaby wrote:
Seriously though if it was that bad should you have even departed?
There was no convective activity, just a lot of rain and cloud, and I’d already flown in it (this was a fuel stop, so I’d already flown the ILS and knew what the general conditions aloft were like first hand).
BeechBaby wrote:
Due to you flying one of the most iconic aircraft in the world, the Beechcraft Bonanza.
Is it another PhD study/article on how V-tail work well for flying in rain? 
