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BROKEN WING - Sig "CABINAIRE" 22" wingspan (Read 388 times)
Reply #12 - Jul 18th, 2017 at 10:05am

LASTWOODSMAN   Offline
Senior Member
REAL PLANES HAD ROUND
ENGINES AND TWO WINGS
Windsor, Ontario, Canada

Posts: 295
****
 
5348     LONG VIEW  - See how I made the Spar stringers extra
            long.    
5349     TOP VIEW
5350     SIDE VIEW
 

OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
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Reply #11 - Jul 17th, 2017 at 7:47pm

MKelly   Offline
Junior Member
Helotes, TX

Posts: 67
**
 
LWM,

Your repair will be solid and will work fine - it just adds a little weight.  You may want to consider checking lateral balance once you get things re-covered.  When you fly it after the repair, watch for any unwanted turn towards the heavy wing.  If necessary you can add weight to the opposite wingtip, but I'd only do that if you need to correct an unwanted turn - if it flies well just let it be.

FWIW, I did put a doubler on the back side of the leading edge when I repaired the Tempest, but that was because I'd cut out recesses for the cannon ports, and the LE broke at one of those recesses.  Since the repair required re-covering the underside of both wing panels I put a matching doubler on the other side, and have not had it break in any of the (many) cartwheeling landings since.

Cheers,

Mike
 
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Reply #10 - Jul 17th, 2017 at 7:08pm

LASTWOODSMAN   Offline
Senior Member
REAL PLANES HAD ROUND
ENGINES AND TWO WINGS
Windsor, Ontario, Canada

Posts: 295
****
 
Mike ! - that's what I should have done in the first place   Huh   - I have it all glued up now with extra weight ....  Undecided  we will see tomorrow.  And here I am posting the repair like I know what i am doing ...   Embarrassed  I'll post a couple of pics of it drying later on tonight.
Thanks for your pics!

LWM
 

OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
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Reply #9 - Jul 17th, 2017 at 3:05pm

MKelly   Offline
Junior Member
Helotes, TX

Posts: 67
**
 
LWM,

It's not necessary to double up the spars for the repair - that adds weight.

Instead, splice the spars together across the nearest convenient joint - for example where they cross a rib.  See pics below from the Tempest repair - note how the spars are sliced at an angle across the rib.  Slice the new section of spar at the same angle, trial fit, then glue it in.

This repair is just as strong as the original spar, and the only weight added is a little bit more glue than in the original wing.  It has held up well for me on the Tempest.

Hope this helps,

Mike
 
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Reply #8 - Jul 17th, 2017 at 2:50pm

LASTWOODSMAN   Offline
Senior Member
REAL PLANES HAD ROUND
ENGINES AND TWO WINGS
Windsor, Ontario, Canada

Posts: 295
****
 
5334  - Top view of the Highlighted Plan beside the plane.

5335  - Closeup of the highlighted plan copy.
 

OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
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Reply #7 - Jul 17th, 2017 at 2:47pm

LASTWOODSMAN   Offline
Senior Member
REAL PLANES HAD ROUND
ENGINES AND TWO WINGS
Windsor, Ontario, Canada

Posts: 295
****
 
5318 & 5326  - The outer Wing Panel was removed from the building board, after all of the stringers were dried

5336  - Underside view of Outer Wing Panel with Spar stringers attached.

5319  - View of Outer Panel leaning on the plane.

5320  - Now we are ready to size the Spar stringers to the correct length.
 

OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
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Reply #6 - Jul 17th, 2017 at 2:39pm

LASTWOODSMAN   Offline
Senior Member
REAL PLANES HAD ROUND
ENGINES AND TWO WINGS
Windsor, Ontario, Canada

Posts: 295
****
 
Then I slid out the Spar stringers, double white glued all of the mating surfaces, and then slid them back into position to glue up and dry thoroughly overnight.
 

OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
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Reply #5 - Jul 17th, 2017 at 2:35pm

LASTWOODSMAN   Offline
Senior Member
REAL PLANES HAD ROUND
ENGINES AND TWO WINGS
Windsor, Ontario, Canada

Posts: 295
****
 
Then I slid the Spar stringers in and through the notches and into position.  I then further blocked them allup with more small bracing planks etc., nice and snug but not too tight a fit.
 

OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
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Reply #4 - Jul 17th, 2017 at 2:32pm

LASTWOODSMAN   Offline
Senior Member
REAL PLANES HAD ROUND
ENGINES AND TWO WINGS
Windsor, Ontario, Canada

Posts: 295
****
 
I decided to glue the stringer spars on the Outer Panel first, extra long, cut them to shape, and slide them into the wing root with the wing root securely clamped down on a jig setup on the building board.
I started on the Outer Panel first.  Here is how I glued the extra long 1/16" sq balsa Spar stringers in place, after making the notching holes.

5307 & 5308   - First I clamped down the Outer Wing Panel, lined up the four extra long Spar stringers, and got some small balsa bracing planks ready.

 

OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
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Reply #3 - Jul 17th, 2017 at 1:22pm

LASTWOODSMAN   Offline
Senior Member
REAL PLANES HAD ROUND
ENGINES AND TWO WINGS
Windsor, Ontario, Canada

Posts: 295
****
 
WING ROOT

There were also notches cut into the wing root base outer rib to accept the new stringers.

5339  - This pic shows the four notch holes in the outer wing root rib

5342  - This is a closer view

5347  - These are the notching tools I used to "sand in" cut out the notch holes for the stringers.
 

OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
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Reply #2 - Jul 17th, 2017 at 1:13pm

LASTWOODSMAN   Offline
Senior Member
REAL PLANES HAD ROUND
ENGINES AND TWO WINGS
Windsor, Ontario, Canada

Posts: 295
****
 
     The wing was designed with 1/16" sq balsa Spar stringers. Some pieces of the Spar stringers were missing after the crash, and so was a 1/2" piece of Trailing Edge (TE), that I later found in the garbage with the tissue.   My plan was to "sandwich" the bottom rib "middle" Spar, on both sides, with two pieces of 1/16"sq balsa stringer, and the Spar in the top of the rib with one piece of stringer glued right along beside it, and the Leading Edge (LE) with one piece of stringer on the rear of the LE, and eventually, one stringer along the front of the Trailing Edge (TE). These stringers had to go through the ribs, so I had to cut notches in the ribs so that the stringers could go through.

OUTER WING SECTION

5336  - These are the four stringers cut extra long and glued in place - I forgot to take a pic of the notches in the ribs before I glued them, but you can see where the stringers go through.

5346  - This is a closer view.
 

OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
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Reply #1 - Jul 16th, 2017 at 11:30pm

LASTWOODSMAN   Offline
Senior Member
REAL PLANES HAD ROUND
ENGINES AND TWO WINGS
Windsor, Ontario, Canada

Posts: 295
****
 
The ribs are not damaged.  The first bay from the center wing section is OK.
I'm thinking of getting out the 1/16" sq notch sander, and adding some strong stringers ( from an old Guillow's kit ),  glued parallel with and to, the surviving stringers, from rib to rib, and extending through the ribs.  Maybe butt up the leading edge where it cracked off.   Add a chunk of trailing edge that broke off, with more stringers attached to it ...    Roll Eyes
LWM
 

OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
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Jul 16th, 2017 at 11:25pm

LASTWOODSMAN   Offline
Senior Member
REAL PLANES HAD ROUND
ENGINES AND TWO WINGS
Windsor, Ontario, Canada

Posts: 295
****
 
Well, I just smashed up my 22" Sig Cabinaire - BROKE THE LEFT WING !!    Cry   That is what I  get for flying in strong winds and too many winds!    Lips Sealed
     Since I don't have another plane to fly, I think I must try to repair this one now ...     Sad
 

OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
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