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Fill them with av fuel and look for the blue stain.
I thought mine were good with the balloon check but found a leak after paint and assembly. Lancair told me to use the fill and see method and I decided the balloons would be good enough. Both balloons would last for hours. One wing leaked fuel, the other did not. If I were to do it again, I would use fuel and drain it out when done. Then you are sure...
I would do it outdoors to minimize fire danger though.
IMHO
Randy L. Snarr
235/320
Salt Lake City, Ut
Wendell Solesbee <wendell1@pacbell.net> wrote: When I tested my wings I had the same thing happen. When you fill the
balloons when it is warm they will go down when the temperature goes down overnight due to air having more volume when it is warm than when it is cool.If you let them warm up again the next day the balloons will partially re-inflate.My balloons would not completely re-inflate but someone at lancair said if they will stay inflated 8 hours they are OK. So far I have no leaks. Wendell Solesbee Lancair IV-P N4LK
----- Original Message ----- Sent: Wednesday, August 22, 2007 7:32 AM Subject: [LML] Re: wing leak
Does anyone have good ideas for finding the leak location? I'm still building.
I tested my Legacy wings by plugging all but two holes and covered the vent and fuel cap (latched) with packing tape. I then installed barbed fittings to the two remaining threaded holes and put a party balloon over one and a tube on the other. I then compressed the tank and balloon through the tube until the balloon was filled and capped the tube. I checked all the plumbing and
capped holes with soap bubbles, but saw no signs of leaks. However, the balloon was partially deflated the following day. A tied-off test balloon didn't deflate measurably, so I must presume that the air didn't bleed through the balloon.
Does anyone have any ideas for further leak tests? I've heard of putting some freon into the tank and using a sniffer to find leaks, but doing this without false alarms within a garage seems tough. Besides, I don't have the freon or the tester. Has anyone tried this and if so, any suggestions? How about other methods?
Thanks in advance for your help.
- Kyrilian
CavittP@aol.com wrote:
Fuel leak could be relatively simple. Once you find the source of the leak,
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