Home built piper wings
- Thread starter pilotski
- Start date
There wing i built with metal spars what i want to do is cut the front spar down to go in a pa-18 fuselage the j-3 front spar bolts in the center of the fuselage
supercrow
FRIEND
Smith Pond near Millinocket, Me
I have done that, and it is a pretty simple process if your wings were built to correct dimension. You simply need to make sure that the wings are going to be on straight before you drill your holes in the spar. You do not want them swept forward or swept back. Done carefully and correctly it’s a matter of a few hours work.
Yes i know that i wanted to know if i could use the pattern off the fuselage end of the front spar off of a PA-20 ?
supercrow
FRIEND
Smith Pond near Millinocket, Me
I don’t know what the PA20 pattern looks like, but you can use any bracket you want as a pattern to drill holes. If you have P A 20 spar brackets you could use them if you want. Or super cub brackets or J3 brackets. I think the only question then becomes how many bolts do you want through the front spar for the gross weight intended
supercrow
FRIEND
Smith Pond near Millinocket, Me
When I did the one I refer to I set the fuselage directly on a flat surface with no landing gear or engine installed. Mounted the wing struts and bolted the rear spar fitting into place. Bolted the front bracket in place onto the fuselage then squared, the wings into place and drill the front holes.
I just want the pattern of the front spar from the compression tube to where it bolt on to the fuselage right now it has a front spar for a J-3 i need to make it shorter for the super cub i'm wanting to know if its the same pattern on the front spar of a piper pa-20 thank you
skywagon8a
MEMBER
SE Mass MA6
This: http://www.supercubproject.com/drawings/default.aspx is a link to most of the PA-18 drawings. Look there for the details you desire.
MainlandCub
Registered User
New Zealand
The hole pattern in the spar and the fittings bolted to the spar, for the PA-20, -22 are different than the PA-18.
I think the concept is that the load is in line with the fastener pattern, which differs on the PA-20, -22 from that of the PA-18, because the distance between the wing attach and the strut is different.
Following the drawing for the PA-18 spar is probably a better bet.
I think the concept is that the load is in line with the fastener pattern, which differs on the PA-20, -22 from that of the PA-18, because the distance between the wing attach and the strut is different.
Following the drawing for the PA-18 spar is probably a better bet.
