How to Build a B-29
11-26-2015, 06:18 PM
#32
Setting right wing washout:
Center is set at 0 degrees. Then glue to work bench. Bottom strap sets on wood strap glued to table and sanded perfectly straight.
Right wing glued to table and 3 degrees of washout from center to tip locked in place. Fish line attached center of TE and center-wing and wing tip
11-26-2015, 06:24 PM
#33
Bottom spar is removed for main wheel retract gap.
Use 1/4" and cover with thin CA for strength and fuel-proofing
Epoxy the 1/4" spar bridge with a 3/8" balsa sandwich filler between top and bottom spars
Bottom spar will have to be cut to fit dual main wheels into retract bay and wheels will then bump into (and stop) at top spar
11-26-2015, 06:35 PM
#34
Straight edge works great for keeping flap pocket REALLY straight during sanding. After top sheeting is glued on, it will become a core of strength due to triangular shape
Long level makes a great sanding tool. Use high-quality stick-on 120 sandpaper found at auto-body stores, not LHS
Works great for sanding long surfaces that have to turn out straight their entire length. I also used this tool to sand the support that the bottom spar is lying on
11-28-2015, 06:49 AM
#35
If you look closely, the straight edge sitting on top of the spar shows no high or low spots.
If the ribs are not perfect, add wood to match airfoil, so sheeting will contact all surfaces perfectly
Beef up retract bay prior to top sheeting. Main gear mounts get strength from spars and this entire area of wing
Last edited by kram; 11-28-2015 at 06:52 AM.
12-04-2015, 08:11 PM
#37
A 6 foot-long level sanding tool ensures a long straight sanded surface
3M sandpaper with 120 grit to do most of the shaping, then switch to 300 grit for finished surface
Several different sizes sanding blocks and some homemade sanding tools for stick-on sand paper. 3M sandpaper roll is 2.75" wide
12-04-2015, 08:38 PM
#38
Kram, I have to be honest..I did NOT get your Bierce reference....
I did however use the internet and find that not only was he a writer with somewhat of a bad attitude that DID try to mentor others...His rather OBLIQUE? social skills would in fact have made him one of the more cheerful people in my flying circle
He even looks like a WW1 flier...
I did however use the internet and find that not only was he a writer with somewhat of a bad attitude that DID try to mentor others...His rather OBLIQUE? social skills would in fact have made him one of the more cheerful people in my flying circle
He even looks like a WW1 flier...
12-04-2015, 09:19 PM
#39
Yessir! One of yer ilk, I would say.
"Bitter Bierce," as he was nicknamed, was probably best known for a short story about the Civil War titled "An Occurrence at Owl Creek," hailed by some as the best short story in all American literature.
Like many Americans, his soul was crushed by the Civil War, although he lived at least until 1914, when he disappeared while touring Pancho Villa's Mexican Revolution.
So, I suppose he might have had some contacts with early airplanes.
Wikipedia did a good summary
"Bitter Bierce," as he was nicknamed, was probably best known for a short story about the Civil War titled "An Occurrence at Owl Creek," hailed by some as the best short story in all American literature.
Like many Americans, his soul was crushed by the Civil War, although he lived at least until 1914, when he disappeared while touring Pancho Villa's Mexican Revolution.
So, I suppose he might have had some contacts with early airplanes.
Wikipedia did a good summary
12-07-2015, 04:34 PM
#40
Ribs will NEVER be an exactly perfect fit for simply laying down sheeting
Add balsa strips to build up the "short ribs", then sand them all down to exactly the same level with the 6-foot sanding level
I make sure the center-most rib and the mid-wing rib and the end rib are exactly in line, then use those 3 as a guide to building/sanding the rest of them.
12-07-2015, 04:40 PM
#41
Editor's Note:
By now you've figgered out that Dwayne sorta breezes past construction details that most builders have figured out long ago.
But when he perseverates on something like the washout or the incidences or rib edge alignment, it's because it is VERY important for everything from final finish to flight quality and he spends a lot of time perfecting those details now, so he won't be scrambling to correct "ripple" effects later in the build
mt
By now you've figgered out that Dwayne sorta breezes past construction details that most builders have figured out long ago.
But when he perseverates on something like the washout or the incidences or rib edge alignment, it's because it is VERY important for everything from final finish to flight quality and he spends a lot of time perfecting those details now, so he won't be scrambling to correct "ripple" effects later in the build
mt
Last edited by kram; 12-07-2015 at 04:45 PM.
12-07-2015, 05:18 PM
#42
Wing bottom-up with 3 degree washout locked in solid. Application of bottom sheeting will make the washout permanent and solid
Wing center 0 degrees and locked solid with support brackets glued to wing and table
Keep bracing clear for sanding.
12-08-2015, 11:28 AM
#45
This may be a slow building week
Here's some 8 year-old footage of Dwayne flying his first Don Smith 29.
Multiple touch-n-go's are his calling card
Both bombers are powered by Saito .91's
Both are still flying
https://www.youtube.com/watch?v=2YarTeumCKk
Here's some 8 year-old footage of Dwayne flying his first Don Smith 29.
Multiple touch-n-go's are his calling card
Both bombers are powered by Saito .91's
Both are still flying
https://www.youtube.com/watch?v=2YarTeumCKk
12-08-2015, 11:44 AM
#46
Me, flying the same bomber 8 years later
Better video, better runway, worse landing
I had to give it a major makeover of the air and retract system, install JR 12X-2.4, but basic structure and engines very much airworthy
https://www.youtube.com/watch?v=VDX54Iqi9zg
Again, this is the same plane being built on the thread
Better video, better runway, worse landing
I had to give it a major makeover of the air and retract system, install JR 12X-2.4, but basic structure and engines very much airworthy
https://www.youtube.com/watch?v=VDX54Iqi9zg
Again, this is the same plane being built on the thread
