Hi every pattern addicts:
Last Sunday we had our Autumn-Season-Pattern-Competition held under a very funny weather condition (I live in Taiwan, a small island very near china mainland)--with a tropical cyclone on her way to our flight field only about 300 miles away (the skirt turbulent maybe nearer, say 100 or 150 miles ). The humidity was so high (90-100%) and atomospheric pressure shiftted continuously (huntting around the low end). Actually our contest was interruptted five times due to heavy rain.
Almost every competitor's YS 140L quit in air once or twice (mine was one of them), but other's DZ 140 seemed not affected by the weather, still powerful and smooth. Two strokes also worked fine, without any problem. Did you guys ever encounter this kind of dramatic weather change in such a short period of time? Sunny day about 20 minutes with breeze and overcast in next one hour then followed by heavy rain for another 30 minutes----then another cycle.

What's wrong with all these YS 140L? What would you do to your engines in such a "FUNNY" weather condition? Will you richen the needle or lean it? Or will you change the prop? and what's tthe point? the diameter or the pitch? How about change from APC to wooden one?(Lighter prop means fewer load?)
One of my fellow competitor told me that YS 140DZ is more "RESIST" to weather change while 140L is not. Is that TRUE?
Thanks in advance, and any suggestion will be appreciated.