· Home    · The Gallery    · Contact     · View Site Map                

 
Link Indicator
Link Indicator
Outline
Link Indicator
Cut-out Diagram
Link Indicator
3-View Drawings
Link Indicator
Chip Cotton's Skybolt
Link Indicator
Link Indicator
My Smoke System
Link Indicator
Link Indicator
Ribs Preparation
Link Indicator
Rib Templates
Link Indicator
Rib Templates Complete
Link Indicator
Wing Tip Bows
Link Indicator
Wing Tip Bows II
Link Indicator
Upper Ribs Complete
Link Indicator
Link Indicator
Lower Wing Rib Construct
Link Indicator
Spar Fabricating
Link Indicator
Drag Wire Blocks
Link Indicator
Right Wing I
Link Indicator
Right Wing II
Link Indicator
Drag Wire Drill Jig
Link Indicator
I-Strut Drill Jig
Link Indicator
Right Wing III
Link Indicator
Right Wing IV
Link Indicator
Right Wing V
Link Indicator
Right Wing VI
Link Indicator
Right Wing VII
Link Indicator
Right Wing VIII
Link Indicator
Right Wing VIIII
Link Indicator
Right Wing X
Link Indicator
Right Wing XI
Link Indicator
Right Wing XII
Link Indicator
Right Wing XIII
Link Indicator
Right Wing XIV
Link Indicator
Right Wing XV
Link Indicator
Right Wing XVI
Link Indicator
Right Wing Almost Done
Link Indicator
Right Wing Done!
Link Indicator
Link Indicator
Spar Fabricating
Link Indicator
Left Wing I
Link Indicator
Left Wing II
Link Indicator
Left Wing III
Link Indicator
Left Wing IV
Link Indicator
Left Wing V
Link Indicator
Left Wing VI
Link Indicator
Left Wing VII
Link Indicator
Left Wing VIII
Link Indicator
Left Wing VIIII
Link Indicator
Left Wing X
Link Indicator
Left Wing XI
Link Indicator
Left wing Done!
Link Indicator
Link Indicator
New Bench
Link Indicator
Splice Join Jig
Link Indicator
Spar Fabrication
Link Indicator
Upper Wing I
Link Indicator
Upper Wing II
Link Indicator
Upper Wing III
Link Indicator
Upper Wing IV
Link Indicator
Upper Wing V
Link Indicator
Upper Wing VI
Link Indicator
Upper Wing VII
Link Indicator
Upper Wing VIII
Link Indicator
Upper Wing IX
Link Indicator
Upper Wing X Done!
Link Indicator
Center Bay & More
Link Indicator
Topsy-Turvy
Link Indicator
Wing Finally Done!
Link Indicator
Link Indicator
Initial Wing Rigging
Link Indicator
Aileron Linkage & I-struts
Link Indicator
More I-struts
Link Indicator
The Welder from Hell
Link Indicator
Link Indicator
Aileron Templates
Link Indicator
Aileron Rib Construct
Link Indicator
Lower Aileron Build I
Link Indicator
Lower Aileron II
Link Indicator
Lower Aileron III
Link Indicator
Lower Aileron IV
Link Indicator
Lower Aileron V
Link Indicator
Lower Ailerons Done!
Link Indicator
Upper Aileron I
Link Indicator
Upper Aileron II
Link Indicator
Upper Aileron III
Link Indicator
Aileron Rib Anomaly
Link Indicator
Upper Aileron IV
Link Indicator
Upper Ailerons Done!
Link Indicator
Link Indicator
Instrument Panels
Link Indicator
More Panel Stuff
Link Indicator
Panels & Tank Painted!
Link Indicator
Throttle Quadrants & Harnesses
Link Indicator
Fitting Gauges
Link Indicator
Adding Shiny Stuff
Link Indicator
Smoke & Instruments
Link Indicator
Link Indicator
Seat Backs & Torque Tube
Link Indicator
Rudder Pedals
Link Indicator
Brakes
Link Indicator
Landing Gear Choices
Link Indicator
Starting Landing Gear
Link Indicator
Landing Gear Progress
Link Indicator
Landing Gear Ready For Tacking
Link Indicator
Gear. Heel Rails. Firewall
Link Indicator
Landing Gear Setting Toe
Link Indicator
Stuff & Landing Gear Done!
Link Indicator
Elbow Rests & Fuel Valve
Link Indicator
Smoke Tank & Fuel System
Link Indicator
Powdered Mount & Standoffs
Link Indicator
Stringers & Torque Tube
Link Indicator
Sheet Metal
Link Indicator
Sheet Metal & Turtle Deck
Link Indicator
Exhaust Ramp
Link Indicator
Upholstery
Link Indicator
Catching Up
Link Indicator
Link Indicator
Stabs Trims & Controls
Link Indicator
Stabs, Trim & Controls II
Link Indicator
Link Indicator
Powerplant
Link Indicator
Nosebowl & Exhaust
Link Indicator
Alternate Air Induction
Link Indicator
Link Indicator
2007 Recap
Link Indicator
2008 Recap
Link Indicator
To weld or not to weld..
Link Indicator
Skybolt Builders Manual
Link Indicator
Fuel Plumbing and...
Link Indicator
Lots of Stuff
Link Indicator
Link Indicator
Skydiving
Link Indicator
Web Design by Beej
Link Indicator
The TSA Sux...
Link Indicator
Visitors from the UK
Link Indicator
Biplane Expo 2008
Link Indicator
Biplane Expo Musings 2009
Link Indicator
Link Indicator
Link Indicator
Aviation Links
Link Indicator
My Favorite Homebuilt Story
Link Indicator
Link Indicator
How We Met
Link Indicator
The Visits
Link Indicator
Our Wedding Day
Link Indicator
About Us
Link Indicator
Oshkosh 2007 Musings
Link Indicator
Link Indicator
Canopy Redux
Link Indicator
Canopy II
Link Indicator
Link Indicator
Rudder Covering
Link Indicator
Fabric Work
Link Indicator
Link Indicator
Firewall Aft Work
Link Indicator
Instrument Panel Done
Link Indicator
Link Indicator
Link Indicator
 
short solo movie clip Latest Posts
9/6/2017
Fabric Work
1/26/2014
Alternate Air Induction
11/30/2013
Nosebowl & Exhaust
11/22/2013
Powerplant
url for Newsreader:: http://www.65degrees.net/skybolt/rss.asp What's this?
Latest uploaded pic Random Pic
short solo movie clip Movies Clips
My truck pulling days [1.24mb]
First Solo [5.98mb]
Lauries Tandem [9mb]
Latest uploaded pic Random Qoute
Both optimists and pessimists contribute to the society. The optimist invents the aeroplane, the pessimist the parachute. George Bernard Shaw


Upper Wing VI
6/9/2007

click for larger image
Pic showing ply 'ear'...

Glue failure

I noticed my drag wires at one station became slightly slack. So the alarm bells started ringing in my head. Sure enough, a drag block had failed. I couldn't find the test piece that I had 'stored' away! I loosened all the wires and proceeded to give all the blocks a good wack with a 5/8 socket and hammer to see for movement. All seemed ok. But it was haunting me, so I have parred them all off with my best chisel....better safe than dead.

I made the new blocks a little taller [1" 7/8] for more surface area to glue to. It may not be needed, but it made me feel better.

This is my normal procedure for glue-up: vacuum the surfaces, blow them, wipe with acetone, apply glue to both surfaces, let sit for 5 mins, then clamp lightly.

Lesson learned: keep your test pieces labeled and in a bucket somewhere, and test them at the right time.

How did I know it failed? Basically, when tightening up the drag nut, the block moved, but it didn't move immediately, it moved over a 2/3 day period.

The rogue block was from the same glue batch as the others, yet the others it seems were fine, but you cannot really tell until you start chiselling down, then of course, you are committed in changing.

Things to look out for:

good glue procedure

test the test piece before fitting the wires

wires dont need much tensioning

dont tension wires until the t-88 has cured for a few days...it gets stronger over time.

As can be seen from the pics, I also added some ply 'ears' adjacent to the blocks. This provides even more glue surface area.

All this really set me back. I had to trash all my original tramelling setup, remove the wires, remake the blocks, glue back on, re-drill the blocks [I back-drilled via the existing holes in the spar], and finally re-trammel everything.

I think I may found the cause of my failed join:

While making my new drag blocks: I was getting ready to cut the rib-dado in the blocks with a cross-cut sled on my table saw, and I reached for the silicone spray for lubricating the table. I don't often use it [mostly for cross-cutting], I usually rub it in with a cloth, and never had a problem with it affecting finishes or glues, but I got to thinking...what if the original block material had been exposed to silicone when I sprayed the table? What if t-88 doesn't like silcone, period? For all I recall the wood may have been on the edge of the table saw when I sprayed..so..my primitive results:

test pieces, all same glue batch:

-no silicone on table: positive result

-silicone on table, but worked-in with cloth: positive result

-silicone sprayed on wood replicating the over-spray scenario: partial failure - approx 25% of the join failed to mate.

I know this isn't conclusive, but it possibly told me enough that I didnt need to be using silicone and that I may have found the source of my join failure.

Wing Tip

Now I am back on track. Where was I? Oh yeah...I was starting to tidy-up the tip bow area before I was side-tracked with the above...

The foam is now fitted, superfil layered on, and roughly sanded to shape. I will add the final layer of superfil when the LE ply is set. I had taken a little too much off the front spar tip when tapering down, so I laminated a 1/16 piece in there [see pic], which I will plane back down slightly.

Gussetts

I also decided to add corner gussetts to the ribs at the inner bay. This process really is a pain, what with a lot of fiddly pieces to glue-in and cutting the material for the correct angle etc. The best way I found to clamp these gussets, was by inserting a long stick of scrap lumber 1/4 x 1/4 x the length of the bay at the opposite corner + 1/8, set the gusset, then slightly bend the stick as you coherce it into position thus holding the gusset in place under light tension.

Ailerons

Both ailerons are now complete and fitted / aligned. Setting these ailerons actually took as long as building the wing thus far. :0|

I have to add corner gussets to the right wing, then I can finally turn over the wings, and start adding the spar fillers and focus on cloaking the curved aileron wells.

Note: I have realized that it is wise not to splice the two wings together until you really have to...much easier to work with.


Gussets in background and clamping the
Gussets in background and clamping the 'ears'...
Glueing a laminate to build-up...
Glueing a laminate to build-up...

Latest uploaded pic Latest Pics
11/30/2013
go to page entryExtending and repairing the nose bowl.....
11/22/2013
go to page entryOn arrival.....
Latest uploaded pic Progress Diagram
click to view large diagram
- Latest Stuff
RSS Feed Reader
- The Real News
RSS Feed Reader
 Local TX Weather
Georgetown Weather Advisory:
RSS Feed Reader
Fair and 32 F.
Winds: Southwest at 3.
Pressure: ".
Humidity: 85%.
Heat Index: .
Updated: Dec 13 2017, 3:56 am CST.
65degrees.net 2017. All rights Reserved. Web Design by 65degrees.net.
.