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Post by patmatgal on Feb 21, 2008 23:08:40 GMT 1
Just got a new Super Cub the other day and found that one of the wing struts is very loose. Measured tis distance between the top of the studs that go thru the wing and it comes out good, took off the strut and it seems OK, but something is wrong. I used 80# kite string, looped thru the strut tabs and tied it off across the underbelly to replace the struts. Haven`t tried it yet but looks sound.  |
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sb352
Squadron leader
Posts: 147
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Post by sb352 on Feb 21, 2008 23:12:42 GMT 1
You might want to ask some of the other guys , but I believe the struts should be loose because of the wing flexing in flights
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Post by patmatgal on Feb 21, 2008 23:48:30 GMT 1
sb352
Looked at some other threads. Definitely I get the impression there should be some "looseness" Double checked what I did and it looks good but if there is a problem I`ll know where to look 1st.
thanks
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mac
Squadron leader
Posts: 138
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Post by mac on Feb 22, 2008 4:21:35 GMT 1
Ive been told that mine were taught but I didn't have a problem with them after 3 or 4 flights. I will be making them looser though.
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sb352
Squadron leader
Posts: 147
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Post by sb352 on Feb 22, 2008 4:22:24 GMT 1
Not a problem It is only my personal experience due to the fact that i am a rookie
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Post by patmatgal on Feb 25, 2008 1:31:47 GMT 1
Not to over analyze this situation but: Does anyone think that running the string from the bottom of fuse to a wing tab, across the bottom of wing, thru the other tab and back to fuse will make a difference, as opposed to securing each wing tab to the fuse? Basically what I have now is a figure 8 with the plane in the center.
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Post by spar on Feb 25, 2008 13:16:45 GMT 1
I believe you are describing a pattern that might connect to both ends of the wing. I think it is important to independently support the right and left sides of the fuselage so that the string cannot slide back and forth.
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Post by patmatgal on Feb 25, 2008 19:49:29 GMT 1
spar
"independently support the right and left sides of the fuselage so that the string cannot slide back and forth."
Yes that is it exactly! Then I`l l go ahead and change it to a configuration so that each wing is tied off to the fuse. The way it is now there is basically one big loop (wrapped around those little screws for the struts) of string and the wing would be able to shift.
thanks much
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Post by sackohammers on Feb 25, 2008 23:12:02 GMT 1
The other reason to not go with a figure 8 solution is ease of taking the wing off. Thats one of the big reasons I went with the fishing swivels.
Go ahead and leave a little slack in your struts. They're there to keep your wing from folding in half... your wing would need to flex a fair bit for that to happen.
Also, if your struts are taught, then you have a greater chance of causing damage in a rough landing.
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Post by patmatgal on Feb 26, 2008 21:27:21 GMT 1
sackohammers
I went ahead and eliminated the figure 8, each side now has the string looped thru the wing tabs and secured to the screw in fuse. Again, thanks everyone for the info (now if I can only keep that plane in the air) Can`t wait to try it out again...
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Post by chilliwackdan on Mar 8, 2008 21:02:22 GMT 1
 I lost my Cub on Wed due to a sharp pull up after a roll and dive. The wing struts pulled out and the wing folded, and the ashphalt did not yield. Bent the shaft on my E-Flight 450 and the fuse crumpled from the nose to the rear wing mount. A trip to the LHS and I had a fuse tail feathers, wing, and cowl for under 80 $.Next time I will use string for the struts. Great Idea! Chilliwack Dan
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Post by patmatgal on Mar 12, 2008 0:47:09 GMT 1
chilliwackdan
The string seems to work well but the other day the abrasion from the screw cut through the left line and my wing snapped. lol That was an easy fix. sackohammers suggested anchoring the string to the base of fuse using fishing swivels, will try it that way.
ps thanks sackohammars
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I lost my Cub on Wed due to a sharp pull up after a roll and dive.