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Old 06-02-2020, 07:47 PM   #21
Dutkoski
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Re: Reaction 64, design and build


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Outside of using it, I don't know much in the way of spec's. I have a friend who was an engineer and he custom built it for me about fifteen years ago, works beautifully too. He built it so the carriage can travel almost 36". Each carriage is mounted on it's own board. This way I can move them apart if I want to expand the width to whatever distance I want which comes in very handy. The wire heat source is via a T-10 Variat Transformer which is about 25 yrs old. But you can buy digital versions now.
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Old 06-02-2020, 07:58 PM   #22
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Re: Reaction 64, design and build

Today, the build finally started. Actually, late last night I cut the fuselage sides and the three formers, but today, I started gluing things together. The top and bottom are covered in 3/8" thick foam custom sliced on my CNC foam cutter. The bottom of the fuse behind the wing will be covered in 1/2" as I might need to sand extra space for the thrust tube.

The 1/2" bottom cover is not attached yet, might need the access to install the fiberglass thrust tube.

I used 5 minute epoxy for the whole assemble.

Total weight for the unsanded fuselage, 10.4 oz

Tomorrow, the wings, stabilizer and vertical fin.
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Old 06-03-2020, 06:53 PM   #23
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Re: Reaction 64, design and build

Well, darn, I thought I covered all bases regarding the measurements and then, I set the foam panel in the wrong spot and the root cord length was for the side of the fuse, not the centreline. The machine cut a really nice wing panel, too bad it's 45 mm too short at the wing root.
So, this oops just cost me $35.00 for another 2" thick sheet of foam.

Well, if you are going to make a mistake, make it a good one.
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Old 06-03-2020, 07:09 PM   #24
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Re: Reaction 64, design and build

John - Just rename it the reaction 60.5. - problem solved!!!
Can't wait to see how this works out - I did get my 30" one in the air and it flies fine - video at the end of that thread...

Chris
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Old 06-03-2020, 07:25 PM   #25
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Re: Reaction 64, design and build

Quote:
Well, if you are going to make a mistake, make it a good one.
John you became a philosophe
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Old 06-03-2020, 08:01 PM   #26
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Re: Reaction 64, design and build

After checking the measurements, I gave it another shot and cut a test piece, turned out proper. So, leap of faith, put the last blank on the bed and pressed enter. Afterwards, trimmed the leading and trailing edges square with the center line. The wing fitted really well.

So, off to Home Depot tomorrow and buy yet another sheet of foam.

This very light model is getting pretty big
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Old 06-04-2020, 03:32 PM   #27
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Re: Reaction 64, design and build

Very nice build, are you going fiberglass the fuse for ding protection
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Old 06-07-2020, 06:08 AM   #28
Dutkoski
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Re: Reaction 64, design and build

Sorta, the whole airframe will be covered in 3/4 oz fiberglass cloth using water based urethane, not epoxy. I will be hardening up the leading edges of the wing though with some 1.5 oz fiberglass cloth and the wing center section will have some 4 oz fiberglass cloth. But primarily it's be 3/4 cloth.
The models surface however will still be susceptible to dings so some care must be taken.
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Old 06-07-2020, 09:17 AM   #29
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Re: Reaction 64, design and build

John, thanks so much for the very detailed reply.
Cheers
Carl
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Old 06-08-2020, 06:49 AM   #30
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Re: Reaction 64, design and build

And if you are wondering if the water based urethane can fill the fiberglass weave and provide a smooth fiberglass like finish, the answer is yes. It may take three coats and a very light sanding between coats, but the finish is very smooth.

Here is one of my Arrows I produced, except for some vacuum formed plastic parts, the airframe is built entirely out of the same foam.

Almost forgot, the pointy nose portion is toughened up with 2 oz fiberglass cloth and 20 minute epoxy finishing resin and then sanded to bond in with the foam. I can now tank the plane on the nose with fear of damaging the nose. The same treatment is even more important on my Mig-25.
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Last edited by Dutkoski; 06-08-2020 at 06:55 AM.
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