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Old 10-10-2017, 06:45 PM   #21
cubdriver2
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I think there is a SB on the bottom tail wire tab being one piece connecting both lower wires

Glenn


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Old 10-10-2017, 07:32 PM   #22
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Yes, PA-18


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Old 10-10-2017, 07:33 PM   #23
cwbjr
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Reileyr - yup 1/8th is too thick. I am planning on .062 which should be what Taylor/Piper used. I like the seaplane grommet idea but it won't fit under the J2's spring. Its mounted different than a J3 and only about 1/16th off the bottom of the fabric. I believe they had holes drilled in the longerons at about 30 degree angle with a regular grommet under these holes. They can be seen in the photo I posted earlier. Also has a 1/16th hole at the back of the tailpost at the bottom.

KAP - I believe your right that the AN3 bolt are weaker than the tab in shear. Can't imagine there will be much force on any of this area with smooth weather gentle flying.

Skip - no tail slides, at least not on purpose. Just pattern cruising. At 55 mph it will probably take 20 minutes to do the pattern. :-)

Glenn - I believe that SB is for the Super Cubs? There is a J2 SB concerning beefing up the tail skid/tailwheel attach area as student were damaging it.

Thanks everyone for the help. All the new tubes are now in place and I need to make the tabs and a few other things. I will post some pictures of what I found if anyone is interested. Glad I did it but it was no where near as bad as I thought.

Thanks
Bill
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Old 10-11-2017, 06:33 AM   #24
bob turner
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I do three landings in 21 minutes average. We have done as many as 14 in an hour, including 13 minute average taxi time.

When everybody else is watching football, I get clearances for engine failure practice. At 400' agl I get my choice of runway, and can easily hit six different runways in ten minutes of flight time.

It pays off - remind me to tell you about my student who had a complete, sudden engine failure at 400'.
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Old 10-11-2017, 01:37 PM   #25
reileyr
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PA-18 SB because of tail shake when steeply climbing at low airspeed with long prop, balanced elevators, full flaps, and full power. Looking back at the horizontal stabilizers, I've seen them doing a hula dance, especially on the port side. Lots of movement due to turbulence.
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Old 10-11-2017, 06:05 PM   #26
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Well I completed replacing the lower part of the J2s tailpost and the back 10 inches of the bottom longerons. Tailpost was bad with a lot of internal rust. The longerons had a couple pinholes all the way thru and needed replacement.

My advice FWIW to anyone on the fence about replacing these rear portions is to good ahead and do it. I made up my mind when I was tapping around with a Maule tester and a punch. Found soft spot so I started cutting. Attached are some pictures of the corrosion after bead blasting.

Bill
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Old 10-11-2017, 06:49 PM   #27
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Thanks for the photos. Ugly. I'm definitely not in favor of Piper longeron holes. I TubeSeal and rosette weld shut.


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