Asg29 very slow water dumping issue (20+ minutes and wings still halffull or more)

I'm with Hank - start with venting. I did the one-way valve mode on the filler caps, and my wings consistently drain much more quickly than factory original. Also, I had the exact symptom you are talking about at Harris Hill last year with a pinched vent tube in the right wing. Also, once pinched, they are more likely to get pinched again since they develop a memory crease.

As a quick test with the wings full, put tape over the vent outlet in the wingtip while you open the valves, then peel the tape. There should be a very distinct improvement in dump rate.

P3

On 12/14/2016 6:48 AM, Sean wrote:
This has been a problem since late this summer. Asymmetric and or slow dumping.

After having the valves open today for (guessing) 20+ minutes (to be sure it was dry) I landed to find the wings with significant water (10-15 gallons a side) still on-board. Water flows thru the outboard panels so they are clear. The valves seem to be opening fine on the ground. We checked the outer panel for flow carefully this am before flying. Water flowed thru easily when the full wing was lowered slightly.

This is quite a mystery. It cost me significantly today. I thought I was empty but was still well over 10 lb/ft I'm guessing by the amount of water still in the wings when I had landed. It took 5-7 minutes for the water to dump AFTER I had landed.

Any ideas on what could be cuasing an excessively slow dump cycle? Anyone else having this problem? What else should I check for? What is the expected dump time for a 29? I use 6 minutes to be safe usually.

Maybe I was perceiving actual dump time wrong (need a stopwatch)? Maybe I thought only 3 minutes was 10-15? Maybe I was my using the fuselage tank valve handle accidentally and not the wing/tail? Even if this was the case it was 7-10 minutes from my last "thermal" to the ground and the water was flowing fine out of each wing valve when I landed. So the right valve handle was opened at this point. This should have emptied the wings alone easily, to say nothing if the 10-20 minutes the valves were open in occasional dumps before that point.

Thanks in advance for ideas...

Sincerely,

Sean



Hey Sean, are you using factory or the US modified fast dump valves?
Can you actuate the valves on the ground? How does it feel when you
push on the actuator rod with the wing out? Does the bowden cable move
freely with the wings out? Not sure if any of this is helpful - just
things I would look at if it was my ship.

Cheers
Luke

On Wednesday, December 14, 2016 at 6:48:05 AM UTC-5, Sean wrote:
This has been a problem since late this summer. Asymmetric and or slow dumping.

After having the valves open today for (guessing) 20+ minutes (to be sure it was dry) I landed to find the wings with significant water (10-15 gallons a side) still on-board. Water flows thru the outboard panels so they are clear. The valves seem to be opening fine on the ground. We checked the outer panel for flow carefully this am before flying. Water flowed thru easily when the full wing was lowered slightly.

This is quite a mystery. It cost me significantly today. I thought I was empty but was still well over 10 lb/ft I'm guessing by the amount of water still in the wings when I had landed. It took 5-7 minutes for the water to dump AFTER I had landed.

Any ideas on what could be cuasing an excessively slow dump cycle? Anyone else having this problem? What else should I check for? What is the expected dump time for a 29? I use 6 minutes to be safe usually.

Maybe I was perceiving actual dump time wrong (need a stopwatch)? Maybe I thought only 3 minutes was 10-15? Maybe I was my using the fuselage tank valve handle accidentally and not the wing/tail? Even if this was the case it was 7-10 minutes from my last "thermal" to the ground and the water was flowing fine out of each wing valve when I landed. So the right valve handle was opened at this point. This should have emptied the wings alone easily, to say nothing if the 10-20 minutes the valves were open in occasional dumps before that point.

Thanks in advance for ideas...

Sincerely,

Sean

By the way good flying yesterday!

On Wednesday, December 14, 2016 at 6:48:05 AM UTC-5, Sean wrote:
This has been a problem since late this summer. Asymmetric and or slow dumping.

After having the valves open today for (guessing) 20+ minutes (to be sure it was dry) I landed to find the wings with significant water (10-15 gallons a side) still on-board. Water flows thru the outboard panels so they are clear. The valves seem to be opening fine on the ground. We checked the outer panel for flow carefully this am before flying. Water flowed thru easily when the full wing was lowered slightly.

This is quite a mystery. It cost me significantly today. I thought I was empty but was still well over 10 lb/ft I'm guessing by the amount of water still in the wings when I had landed. It took 5-7 minutes for the water to dump AFTER I had landed.

Any ideas on what could be cuasing an excessively slow dump cycle? Anyone else having this problem? What else should I check for? What is the expected dump time for a 29? I use 6 minutes to be safe usually.

Maybe I was perceiving actual dump time wrong (need a stopwatch)? Maybe I thought only 3 minutes was 10-15? Maybe I was my using the fuselage tank valve handle accidentally and not the wing/tail? Even if this was the case it was 7-10 minutes from my last "thermal" to the ground and the water was flowing fine out of each wing valve when I landed. So the right valve handle was opened at this point. This should have emptied the wings alone easily, to say nothing if the 10-20 minutes the valves were open in occasional dumps before that point.

Thanks in advance for ideas...

Sincerely,

Sean

Looks like you got it fixed, Good job in race 2