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Old Sep 23, 2002, 12:04 AM
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Rudderman98's Avatar
United States, WA, Sumner
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Quote:
Originally posted by U812
Your going to love it. Flies big and easy. Always a hit at the field.


Ditto!
Perry
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Old Sep 23, 2002, 08:15 AM
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Jim Young's Avatar
Brighton, MI USA
Joined Jun 2000
1,744 Posts
I got around to cutting the fuse and wing cores this last weekend. I used 3M-77(black can) to laminate 3 layers of 2" foam together for the fuse. The hotwire never knew it was there. Great idea! If you try this yourself, make sure you are using the older black can, I seem to remember some posts about 3M changing their formula and 77 now attacks foam. I went through about 2/3 of a 4' x 8' sheet of foam for the wings and fuse (including one screw up on a wing panel :^).

I also have the tail feathers cut, glued and shaped, and the motor mount pieces cut. The tail feathers took 2 sheets of 4"x36" balsa, and the motor mounts 12" x 12" of 1/16" ply.

I'm estimating 11 sheets of 3"x36"x1/16" balsa to sheet the fuse. I'm planning on vacuum bagging the fuse and wings with my wife's Food Saver.

I guess I should add a materials list to the plans.

-Jim
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Old Sep 23, 2002, 08:21 AM
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Brighton, MI USA
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P.S. Ed, I did look at Superior, but the shipping charges on light, oversize packages was 1/2 the price of the foam!

-Jim
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Old Sep 27, 2002, 08:14 AM
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Brighton, MI USA
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Here's some pictures of my progress so far....

The basic "kit":
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Old Sep 27, 2002, 08:15 AM
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Brighton, MI USA
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And here's the sheeted fuselage...
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Old Oct 13, 2002, 02:13 PM
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Jim,
Don't keep us in suspense!
How's it comin along?
Perry
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Old Oct 15, 2002, 07:58 AM
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Jim Young's Avatar
Brighton, MI USA
Joined Jun 2000
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Current State

Here's my progress to date....

The wing is joined and glassed. The motor wires and mounts are installed. The elevator is joined and is set up for internal linkage.

Last night I was sanding and filling the wing saddle. When I cut the wing saddle out of the fuse I forgot to take off the masking tape that was holding the layers of foam together on the inside of the bed. I took off the outside tape, but when I was in the middle of the saddle I remebered about the tape on the inside. I was amazed, the hot wire actually cut through most of the tape! (Don't try this at home:^). There were a few spots where the wire got hung up, so the wing saddle was not as "precise" as I would have liked. A little spackling and sanding and it will be all trued up.

The fuse is super light (~6 oz.), but the wing has started to bulk up with the motor mounts and wire. The next project will be the wing mounts and tail mounting.

-Jim
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Old Oct 15, 2002, 08:58 AM
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PanzyPoof's Avatar
Brampton
Joined Sep 2001
1,439 Posts
New to Hot wire, So are these Plans Designed for this construction method?
Real Impressive! Great Job
GO DOG GO

Could you explane how you're doing engine cowls and mounts as you get there thanks.
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Last edited by PanzyPoof; Oct 15, 2002 at 09:00 AM.
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Old Oct 15, 2002, 09:08 AM
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Jim Young's Avatar
Brighton, MI USA
Joined Jun 2000
1,744 Posts
Yes, the plans are for foam sheeted with balsa for most of the construction. I use Sig nichrome wire available at your LHS and a home made "feather cut." I did an article in MA a few years back on making one from some aluminum channel I found at Home Depot. I used 3M-77 to sheet the fuse and epoxy to sheet the wing. When I did the fuse, I just glued up a ~15" wide sheet of balsa, sprayed with 3M-77 and rolled the two together.

It has gone pretty fast to this point. I only get about an hour of building time here and there due to the kids. This is about 3 weeks of my work to this point.

-Jim
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Old Oct 15, 2002, 09:18 AM
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Brampton
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Thanks for the Imformative responce
I'm thinking and hope to do the Wing for my PBY
in foam and Balsa Sheet
Will be spying on Ya now
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Old Oct 15, 2002, 11:58 AM
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Outstanding!!
Keep it up Jim
Perry
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Old Oct 15, 2002, 06:25 PM
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Perry,
How are those Clear nose sections coming a long? He's going to need one. We will too. I have the stone plug here, but my vacuum form will never pull something as deep as this one.
Jim, looks super!!
Steve
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Old Oct 16, 2002, 12:59 AM
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Quote:
Originally posted by U812
Perry,
How are those Clear nose sections coming a long? He's going to need one. We will too. I have the stone plug here, but my vacuum form will never pull something as deep as this one.
Jim, looks super!!
Steve

Uhhhhh..................working on it??
Perry
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Old Oct 16, 2002, 03:11 AM
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Just need a vacuum form with lots of pull. I can see the crew through the windows now.
Steve
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Old Oct 16, 2002, 08:19 AM
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Brighton, MI USA
Joined Jun 2000
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It does look kind of funky with a flat nose, Perry! I need to go down to Wright Patterson, I they have a portion of a B-29 where you can walk through nose. I could take a picture of the cockpit and use that behind the windows. Anyone in the Dayton area with a digital camera?

Ok, how about motor selection? I am planning on 4 x 6V Speed 400's running on 8 x 2400/3000 cells. Is there any argument for using 7.2V motors, or something else? Props will be 6x4's, or maybe the Graupner "scale hub" props, which I think are 6x4 or 6.5x4.

-Jim
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