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TOM AKERY PLANS COOKUP? (Read 24065 times)
Reply #396 - Apr 2nd, 2020 at 8:35am

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Amherstburg, Ontario, Canada

Posts: 1220
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Thanks for the well wishes Bob. Didn't realize how much I miss working on my airplanes. Spending time cleaning my workroom, cataloging my plans and generally hoping for a good outcome. If this Covid sheltering at home wasn't bad enough, can't cut and sand. Am however noodling on a trailing edge forming tool and an all around balancing fixture. This too shall pass.
Mike
 

"Skill comes by the constant repetition of familiar feats rather than by a few overbold attempts for which the performer is yet poorly prepared." Wilbur Wright
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Reply #395 - Apr 1st, 2020 at 2:03pm

bigrip74   Offline
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Austin, Texas

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Mike, wishing you a speedy recovery.

Bob
 

IF IT AINT BROKE DONT FIX IT!
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Reply #394 - Apr 1st, 2020 at 12:46pm

Sky9pilot   Offline
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Kelso, WA 98626 USA

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Sorry to hear about your injury.  You're in our thoughts and prayers!  Take it easy.  I know about those upper arm/shoulder injuries.  Rest up and check in when you can!
 

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Reply #393 - Apr 1st, 2020 at 8:36am

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Amherstburg, Ontario, Canada

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Tom - Thank you very much for the tutorial. You have validated much of my thinking about pattern making but provided a lot more detail and made my work much easier. Sorry to say however that I have been directed to be out of action by my doctor for at least three to four weeks due to a shoulder injury I got falling on the ice on my driveway about three weeks back. Bone bruise and hairline crack on the upper arm bone. Can type right handed (I'm left handed as fate would have it) so will be looking in every day. Thanks again for the tutorial.
 

"Skill comes by the constant repetition of familiar feats rather than by a few overbold attempts for which the performer is yet poorly prepared." Wilbur Wright
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Reply #392 - Mar 31st, 2020 at 7:25pm

Sky9pilot   Offline
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Kelso, WA 98626 USA

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Making an old fashioned canopy part 2

I've gone through the process of making paper patterns and trimming them to fit. 
If you have closely made the framework symetrical you should be able to use the same pattern for the triangular panels each side of the central windscreen panel.

Once satisfied you can them apply them to the framework.  You can use steel hairclips to help hold the plastic/celophane in place.  If using plastic sheet you find that rolling the plastic on a 1/4" or 1/2" dowel or similar shape will help the plastic to conform to the canopy framework.  The celophane is not a problem to bend to the framework but it hard to get it smooth if there are many contours you will be making...like the front windscreen.  I wait a day or so to let the glue really dry and you'll find that Aleene's Tacky Glue dries clear when it is completely cured.  In the last picture you'll see a piece of reed around the bottom of the windscreen port side.  This is held in place by a hairclip at the cockpit opening and by a pin in the fuselage.  This won't show once glue is dry.

Once that is done a hair dryer or heat gun on low applied to the celophane
(make sure you don't get too close or you'll be doing this all over again)
will cause the celophane to tighten up nicely.  Remember a little heat goes along way with celophane!!!  Here's the rest of the pictures till I finish the sliding section.
 

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applying_celophane_to_frame_2.jpg

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Reply #391 - Mar 31st, 2020 at 7:15pm

Sky9pilot   Offline
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Ditto what Bob said on that canopy.  I am trying to fulfill Bob's request here and so here's my making an old fashioned canopy by fitting panels to the canopy framework. 

I used scrap paper to make the patterns but feel free to use a sheet of bond/printer paper to make your patterns.  I use a pencil to trace the pattern from the paper laying over the framework.  I cut the paper into smaller sizes to closely fit the panel that will be traced. 

I like to use the desk lamp to backlight the paper and framework to make tracing the panel easier.  I then cut just outside the traceing about 1/16". 

Once that is done I place the pattern on the framework and rub around the edges to crease the pattern where it's too large.  I then use scissors to trim the pattern back to the creases. 

Once I'm satisfied with the pattern I trace that on the celophane/plastic I'll be using.  I use a sharpie thin marker.  The ink can be removed once it's cut out by using isopropyl alcohol in a wrag to remove it.  Cleans the plastic as well.

I usually cut out the front windscreen and rear canopy portions first. Then add the sliding/folding portion of the canopy last to overlap the other two areas.  I'll cover the seams with painted or double tissue to make the outside framework.  On this one I plan to paint the outside framework using the floral spray used on the tissue.  I'll spray a sheet of white label sheet and cut to size.

I used Aleene's Tacky Glue thinned with water to attach the celophane panels.  I apply it and let it set to get "Tacky" then add another thin coat with a small brush just before applying the panels.  I use small steel hair clips to help hold the celophane in place till the glue dries.  I try to stretch the celophane as tight as I can without pulling it off the fuselage joints that can be only held by masking tape.  I use the yellow masking tape. Easy release so it doesn't pull up the finish on the tissue. Here's the pics...
 

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tracing_2.jpg
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tracing_and_trimming_3.jpg
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trans_pattern_to_plastic_2.jpg

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Reply #390 - Mar 31st, 2020 at 1:23pm

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Amherstburg, Ontario, Canada

Posts: 1220
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Bob - Thank you for the good words. It is a work in progress as is most of the things we do in this hobby and is my first serious vacuum forming and detailing. The next and last for this airplane will be much better.
Mike
 

"Skill comes by the constant repetition of familiar feats rather than by a few overbold attempts for which the performer is yet poorly prepared." Wilbur Wright
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Reply #389 - Mar 31st, 2020 at 1:00pm

bigrip74   Offline
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What did l do this time!
Austin, Texas

Posts: 6393
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The photos show a beautiful canopy Mike.

Bob
 

IF IT AINT BROKE DONT FIX IT!
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Reply #388 - Mar 31st, 2020 at 11:13am

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Amherstburg, Ontario, Canada

Posts: 1220
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I'm finally beginning to master the canopy making business but have a bit of distance to go. The canopy is one of the early ones I vacuumed and it has a lot of flaws because of the imperfections in the plug and was too small for the space it needed to go. However, it did make a great experimental tool to figure out the framing and trim. Started with decal sheet pieces colored to match the fuselage but they were too fragile so went to colored tissue and glue stick with much better results. I've added material to the back and bottom of the plug and polished it smooth so new canopy coming soon.
Mike
 

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"Skill comes by the constant repetition of familiar feats rather than by a few overbold attempts for which the performer is yet poorly prepared." Wilbur Wright
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Reply #387 - Mar 25th, 2020 at 11:54pm

pb_guy   Offline
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So I'm just a kid at heart.
Youbou, BC, Vancouver Island

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Excellent canopy framing!
ian
 
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Reply #386 - Mar 25th, 2020 at 7:11pm

Sky9pilot   Offline
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Kelso, WA 98626 USA

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Thanks Bob,
The frame is balsa and reed.  The rounded windscreen frame is reed. The rest is balsa laminated for the front inverted "U" and I had some 3/32" sq that had been soaking for quite awhile, actually had forgotten it was in the soak tube.  I wrapped them around the forms and let them dry overnight.  The top "T" frame between the "U's" is 3/32" sq.

I'll try to do a "How To" on the paper forms for the canopy panes tomorrow.
 

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Reply #385 - Mar 25th, 2020 at 6:56pm

bigrip74   Offline
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What did l do this time!
Austin, Texas

Posts: 6393
*****
 
Tom.

1. great job.
2. is that wood on the canopy frame?
3. would you post photos of your process in making the paper especially for the wind screen.

Bob
 

IF IT AINT BROKE DONT FIX IT!
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Reply #384 - Mar 25th, 2020 at 6:24pm

Sky9pilot   Offline
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Stick & Tissue
Kelso, WA 98626 USA

Posts: 11456
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Well, finally got out of the CAD program and completed the canopy frame for the Fang...
I have some celophane that I will use to fill in the window panels.  That will come tomorrow. I'll make paper patterns and then cut the celophane to the pattern.  Here's the canopy frame pics.
 

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canopy_frame_2.jpg
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canopy_frame_3.jpg
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canopy_frame_4.jpg

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Reply #383 - Mar 12th, 2020 at 7:46am

New Builder   Offline
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Amherstburg, Ontario, Canada

Posts: 1220
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Tom and AK - Thank you for the input and direction. I have all the tools except the razor blade but will have the single edge version that AK posted, will arrive on the 14th. It all seems pretty straight forward until you touch the plastic, mine is .007 in. thick. Got this at the local hobby shop and will use it for tests and got some .015 in material at Hobby Lobby last time we visited the states. Will use that for the final draw. I have cancelled all my away time until well into the summer so more results soon.

Thanks again for the help.
Mike
 

"Skill comes by the constant repetition of familiar feats rather than by a few overbold attempts for which the performer is yet poorly prepared." Wilbur Wright
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Reply #382 - Mar 11th, 2020 at 6:10pm

Sky9pilot   Offline
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Kelso, WA 98626 USA

Posts: 11456
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Tools needed to trim canopies to fit a fuselage:  Single edge razor, Straight Toenail scissors, Yellow Frog tape or sharpie marker for outlining the edge of the canopy.

I'm assuming (I know that's dangerous) that the "flange" you speak of is the plastic that wraps under the mold as it is vacuformed.
When I have vacuformed a canopy, I then take a new single edge razor and gently and carefully pierce the canopy plastic that has curved under the mold right under the mold.  Once I have the edge of the razor blade through the plastic I tried to keep the razor blade flat on the bottom of the mold as I work it aroung the mold bottom.  (I try to make the mold a bit longer on each side of the bottom of what the canopy would be for trimming to fit later)  Once the plastic has been trimmed even with the bottom of the mold, it's easy to remove the plastic from the mold.
 
Now it's time to trim the back of the canopy if it's not a bubble canopy.  You'll want to trim it as close as you can to the contour of the fuselage as possible so the only lip on the canopy is the thickness of the canopy.

The scissors make it easier to trim the bottom edges of the canopy.  The yellow Frog tape cut in strips 1/8" strip help to keep the scissors straight as I cut the bottom edge of the canopy.  Hope this is helpful.
 

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finishedspinnermolded-2.jpg

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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