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PAP Pitot and Static Leak Test
- Thread starter jet
- Start date
Loadsa trouble
I had lots of difficulty eliminating leaks. I wound locking wire twice around all joints. Still leaked. I suspected my method using "bluetac". After using a "professional" testing kit, I concluded that the remaining source of the leak was where the plastic tube butt-joins the aluminium pitot tube. I sealed this with silicon and I believe the problem has now gone away.
Cheers...Keith
I had lots of difficulty eliminating leaks. I wound locking wire twice around all joints. Still leaked. I suspected my method using "bluetac". After using a "professional" testing kit, I concluded that the remaining source of the leak was where the plastic tube butt-joins the aluminium pitot tube. I sealed this with silicon and I believe the problem has now gone away.
Cheers...Keith
Static test?
John,
You must be talking about the need to seal a plastic tube to the static port to pull a vacuum on the system and test leak down? The plans say to use modeling clay, but I had a product called 3M Strip-Caulk on hand for automotive use. It is very sticky and made this seal easy.
http://www.amazon.com/3M-Automotive-MMM8578-Strip-Black/dp/B000PEZ1L4
You would not want to purchase a whole package for just this one use, but you can probably talk someone at an auto body shop out of a small piece. On the other static port I just used a small piece of electrical tape to seal it off.
John,
You must be talking about the need to seal a plastic tube to the static port to pull a vacuum on the system and test leak down? The plans say to use modeling clay, but I had a product called 3M Strip-Caulk on hand for automotive use. It is very sticky and made this seal easy.
http://www.amazon.com/3M-Automotive-MMM8578-Strip-Black/dp/B000PEZ1L4
You would not want to purchase a whole package for just this one use, but you can probably talk someone at an auto body shop out of a small piece. On the other static port I just used a small piece of electrical tape to seal it off.
Did my pitot/static tests today. Used plain old plumber's putty to seal the syringe to the static port. Worked great.
What I did find was that I had to tighten both the pitot and static nylon connectors on the back of the Dynon with a small wrench in order to get a proper seal. More than hand tight.
See: http://www.mykitlog.com/users/display_log.php?user=BigJohn&project=639&category=0&log=116440&row=1
What I did find was that I had to tighten both the pitot and static nylon connectors on the back of the Dynon with a small wrench in order to get a proper seal. More than hand tight.
See: http://www.mykitlog.com/users/display_log.php?user=BigJohn&project=639&category=0&log=116440&row=1
yankee-flyer
Well Known Member
I used clay
but I had to hold it in place while a helper monitored the altiyude/speed. If you have excessive leakage the first place to check is the plastic fittings where the lines connect to the Dynon. I used some teflon paste thread sealant and went from excessive leaks to literally none at all.
Wayne 120241/143WM
but I had to hold it in place while a helper monitored the altiyude/speed. If you have excessive leakage the first place to check is the plastic fittings where the lines connect to the Dynon. I used some teflon paste thread sealant and went from excessive leaks to literally none at all.
Wayne 120241/143WM
Why not just build in a test port (a T fitting with a cap) in an easy access area. You might even make it an alternate static source. With a test port, all you do is tape off the static ports and do the vac test from the test port.
