water formation/condensation in 582 carby bowls in tropics

I fly a 582 powered Airborne trike in tropical Northern Australia.

Recently I had two engine failures caused by suspected carby icing when
reducing from climb to cruise power.The landings were
uneventful.Weather was around 30-32 deg C and 90% rel humidity-hot and
humid.
I am consistently finding small drops of water in the fuel bowls even
after a 30 min flight.
Its not the fuel as I have tried every combination of
Premium/Avgas/mineral and synthetic premix in the aircraft.The fuel is
run through a water separator each time I fuelup.There is a whitish oil
film forming on the slides after every flight which must be emulsified
oil.There is also water forming inside the body of the carb slides.
My gut feeling is that the high humidity is causing water condensation
inside the carbs as the carbs are wet externally on landing.
Any other tropical flyers had this experience?My next move is to fit
carb heaters to the aircraft.

If you have water droplets in your fuel bowls, they *have* to be coming
from your tank. No matter how clean the fuel is that you put in, every
time you fly warm, moisture-laden air enters your tank to displace the
fuel you are using. When the tank cools (eg. at night) the moisture
condenses and runs down into the fuel. In these conditions you have to
mount a fuel drain valve at the lowest point in the tank so that you
can drain off any water in the fuel before you take off as part of your
pre-flight inspection. (Same valve that is found in all GA aircraft
tanks, and for the same reasons.) You can also help avoid this
condition by filling the tank completely full after every flight to
minimize the amount of humid air in the tank.

I would have to guess that you are not experiencing carb icing at the
temps you describe. Water droplets in the fuel, however, can
*seriously* mess things up. Water does not flow through the jets as
fuel does, and it certainly doesn't burn very well!

Right now (well, almost anytime actually) I would happily trade
Northern Indiana's cold, wet, windy, cloudy weather for yours! Happy
flying!

Peter

P.D. wrote:
> If you have water droplets in your fuel bowls, they *have* to be coming
> from your tank. No matter how clean the fuel is that you put in, every
> time you fly warm, moisture-laden air enters your tank to displace the
> fuel you are using. When the tank cools (eg. at night) the moisture
> condenses and runs down into the fuel. In these conditions you have to
> mount a fuel drain valve at the lowest point in the tank so that you
> can drain off any water in the fuel before you take off as part of your
> pre-flight inspection. (Same valve that is found in all GA aircraft
> tanks, and for the same reasons.) You can also help avoid this
> condition by filling the tank completely full after every flight to
> minimize the amount of humid air in the tank.
>
> I would have to guess that you are not experiencing carb icing at the
> temps you describe. Water droplets in the fuel, however, can
> *seriously* mess things up. Water does not flow through the jets as
> fuel does, and it certainly doesn't burn very well!
>
> Right now (well, almost anytime actually) I would happily trade
> Northern Indiana's cold, wet, windy, cloudy weather for yours! Happy
> flying!
>
> Peter

P.D. wrote:
> If you have water droplets in your fuel bowls, they *have* to be coming
> from your tank. No matter how clean the fuel is that you put in, every
> time you fly warm, moisture-laden air enters your tank to displace the
> fuel you are using. When the tank cools (eg. at night) the moisture
> condenses and runs down into the fuel. In these conditions you have to
> mount a fuel drain valve at the lowest point in the tank so that you
> can drain off any water in the fuel before you take off as part of your
> pre-flight inspection. (Same valve that is found in all GA aircraft
> tanks, and for the same reasons.) You can also help avoid this
> condition by filling the tank completely full after every flight to
> minimize the amount of humid air in the tank.
>
> I would have to guess that you are not experiencing carb icing at the
> temps you describe. Water droplets in the fuel, however, can
> *seriously* mess things up. Water does not flow through the jets as
> fuel does, and it certainly doesn't burn very well!
>
> Right now (well, almost anytime actually) I would happily trade
> Northern Indiana's cold, wet, windy, cloudy weather for yours! Happy
> flying!
>
> Peter