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Author Topic: Build: Farman F.400 16 inch  (Read 560 times)
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rrfalcon
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« on: June 09, 2021, 02:26:37 PM »

I've decided to get back into building models after a brief layoff of 40 years or so. As a starter, I'm building a Farman F.400 with a 16-inch wingspan using a plan that's a modern reproduction of the old Comet dime-scale plans. I can't read the name of the plan artist, since it's cut off, but it looks like maybe Mike Marrisa. I think he did a "Bogus Series" of Comet look-alike plans, and this is one of them.

So, here are the first pictures, of the plan pinned out on the table, and the first side glued up.
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Build: Farman F.400 16 inch
Build: Farman F.400 16 inch
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Bredehoft
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« Reply #1 on: June 09, 2021, 02:55:08 PM »

Almost certainly the late Mike Nassise from Massachusetts.

--george
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rrfalcon
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« Reply #2 on: June 10, 2021, 03:05:28 PM »

Thanks for having the right name!
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strat-o
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« Reply #3 on: June 10, 2021, 05:03:07 PM »

I'm literally laughing at the irony.  The irony is you are new here so you may not know that for the last seven months there has been a very popular cookup of the forum members building Mike Nassise designs:    https://www.hippocketaeronautics.com/hpa_forum/index.php?topic=25679.0

Of course it is not too late to enter yourself!
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rrfalcon
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« Reply #4 on: June 11, 2021, 02:10:36 PM »

You're right - I wasn't aware of that! I've been on for a few months, but have spent most of that time uploading various magazine issues and looking at the threads that were active about the time I joined. I'll check out that cook-up thread.  Thanks!
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rrfalcon
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« Reply #5 on: June 13, 2021, 02:20:53 PM »

Both fuselage sides are assembled. I still need to trim away the glue residue from the joints, and improve my photography!
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rrfalcon
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« Reply #6 on: June 17, 2021, 12:55:44 PM »

Continuing on - the fuselage framing is in progress. I've re-done the nose former three times, and finally got something I could live with. Most of the fuselage bottom sticks are in, although the one at the nose is a bit short. I'll have to slot in a small filler piece, but since it's all glued up to the nose former I don't think there will be any strength issues. I'm not very good yet at getting the cross-pieces both lined up with the verticals on the fuselage side *and* level with the longerons. I'll have to think about that a bit.
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rrfalcon
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« Reply #7 on: June 26, 2021, 03:44:59 PM »

The fuselage is done, along with the vertical fin/rudder. I've started on the wing, with the wingtips, spar, and trailing edge pinned down and glued.  Next will be to cut out the wing ribs, trim to proper shape, and glue on to the spar and TE. I'm still experimenting with the best way to transfer the shapes from paper to wood. Outlining in a fine-point Sharpie still results in a very coarse line with a lot of bleeding along the grain, so I want something better for the next project.
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OZPAF
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« Reply #8 on: June 27, 2021, 03:11:15 AM »

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I'm still experimenting with the best way to transfer the shapes from paper to wood.
I have found that gluing copies of the ribs onto the balsa with glue stick gives a good outline to cut and sand to.

I cut close to the outline and sand to final shape.

Soaking the ribs in thinners will enable the paper to be removed easily.

It's looking neat - the rust will soon disappear Smiley

Have fun.

John

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rrfalcon
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« Reply #9 on: July 03, 2021, 12:46:21 PM »

The basic wing structure is complete.  I still need to trim the leading edge and sand things down, then set the proper dihedral.
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rrfalcon
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« Reply #10 on: July 09, 2021, 11:59:13 AM »

The structure is done, weight of what's shown is 3.05 grams. I haven't yet done the landing gear, and the rubber and prop are obviously not in place. Now it's time to set the dihedral and figure out covering.
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rrfalcon
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« Reply #11 on: July 25, 2021, 04:14:43 PM »

It's time (maybe past time) for another update. After I mostly finished the structure, I decided to try using printed tissue for the covering. That meant that I needed to go figure out how to clean up the plan PDF so that it showed just the markings I wanted on the tissue. So, after a week or two of searching for info, trying stuff, and learning, I figured it out (mostly). I printed the patterns first on plain bond paper so that I could make sure the size and orientation were correct, then after trimming the tissue to fit the paper it was off for another trip through the printer.  Success! The tissue made it through without tearing or wrinkling, and after I peeled it off the bond paper substrate it was ready for application. It does curl up where the spray adhesive held it to the bond paper, but that doesn't seem to affect how it goes on to the structure.

I started with the fin, and immediately discovered that the ink wasn't going to survive the 50/50 water/isopropyl alcohol mix I was using to shrink the tissue. I'll have to re-do that bit. I'm thinking about trying an alternate method of covering in plain silver and then cutting the letter from blue tissue and using spray adhesive to put it on the fin.

On the fuselage sides, I tried spraying the back side of the tissue (Peck Polymers silver), and that worked better. If I kept the spray down to just dampening the tissue, it didn't cause the printer ink to run. It didn't tighten up as much as I would have liked, but I think it will be enough. For the sprayer, I'm using a perfume atomizer. That gives a very fine mist, and is easy to re-fill. I used the same technique for the wings.

I had printed alignment marks on the tissue at the edge of where the structure should go to help me get everything in the right place. Unfortunately, I put the marks too close, so some of them ended up on the tissue that's staying with the model. I'll know better next time!
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Re: Build: Farman F.400 16 inch
Re: Build: Farman F.400 16 inch
Re: Build: Farman F.400 16 inch
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