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Thread: Building a Fokker D VII

  1. #191
    Frank,
    I just lost the two shortest riblets and had the material to make the two longer ones. Basically I just removed two and cut out the HAZ of the others and slip them down. One of the diagonals will get the HAZ cut out and re used. I carefully cleaned up the spar and am using that again. Everything is retacked after loading the sundry parts and may have it finished enough for a side by side progress pic Sunday.

    Jim

  2. #192

    Join Date
    Aug 2011
    Location
    Alabama
    Posts
    2,051
    Good to hear it wasn't major surgery.

    I'm impressed with your work - the best I ever did was throwing a bead line down a bit of stock back in High School.
    The opinions and statements of this poster are largely based on facts and portray a possible version of the actual events.

  3. #193
    10/15/18 Yes I started over with a new fuselage Friday. The first one was rather dubious at best. So with much improved welding skills and sticking to gas (oxy/acet) welding Lets get to it.
    First pic is of the two new sides and this pic also displays the cleat system I used same as in the very first fuselage. The second side I did start using steel plate shields under the welds and failed to ignite the table top. Bomber idea.Name:  Fok fuse new.jpg
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    Second pic shows a tubing cluster and the degree of notching involved. Those are all hand cut and requires lots of back and forth with test fitting. Oh my feet hurt that night.Name:  Fok fuse new 2.jpg
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    Third pic shows some welding back where the top longeron does a step down and incidence change for the horizontal stabilizer. The tag end of the longeron there gets trimmed when the welding is all done.Name:  Fok fuse 3 welding.jpg
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    Fourth pic is a shot from the front showing the fixture used to mock up both sides of the fuse so that the cross members can be fit and tack welded. And the fifth pic shows the fixture from the rear.Name:  Fok fuse 4.jpg
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Size:  94.2 KBName:  Fok fuse 5.jpg
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  4. #194
    Pics in a few days

  5. #195

    Join Date
    Aug 2011
    Location
    Alabama
    Posts
    2,051
    Great!

    It's a real statement to your diligence that you could look at your work with an honest eye and realize that there wasn't any fixes to be had, and it required a full do-over.
    The opinions and statements of this poster are largely based on facts and portray a possible version of the actual events.

  6. #196
    This pic shows the end of the fuse after redoing the tail post. I had jammed that in one night and it was very strange the next morning it was crooked. Elves or gremlins me thinks
    Name:  Fok fuse 2 tail post is straight everything else is moving around with the welding.jpg
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    Name:  Fok fuse new 7.jpg
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    55 wire loops so far
    Name:  Fok wire loops 3.jpg
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    Cowl hoops, combing, and gun mount stuff welding in this week. Plan to start painting this weekend
    Name:  Fok cowling and turttle deck hoops.jpg
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  7. #197
    11/9/18, This weeks work after taking two tries at the curvy cowl tubing around the front machine gun mounts and still not happy. So I cut up some of my failed attempts and made the partial cowl supports that are near the adjustable rear gun mounts.
    Name:  Fok partial cowl at rear gun supports.jpg
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    You guys also saw the start of the static front gun mounts that are now completed.
    Name:  Fok front gun mounts.jpg
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    Yesterday I fabbed and welded in the cockpit combing tabs.
    Name:  Fok cockpit combing tabs.jpg
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    And after messing with some other stuff I made the lower wing/fuselage cover. That is the rectangle laying on the work table. The fuselage tabs it bolts to have been drilled but have not been shaped yet. Tomorrow is going to be cold so I may get some time wire wheeling the fuselage in preparation for some epoxy primer if Sunday warms up enough.
    Name:  Fok lower wing cover.jpg
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  8. #198
    11/25/18 Had some warm weather today so I finish welded the inside of the lower wing mount boxes and bolt carrier slugs and a couple reinforcing tubes where the engine bearer supports weld in and then started priming some 3 stations. I was having trouble with the epoxy going off too quick the last few times so I retarded the flash by decreasing the activator part B. At the end of the day I drilled the holes in the big clusters for these rear cabane cups. They should get welded in tomorrow and a second encapsulating coat of epoxy in this area. Manufacturers directions say if I re-coat within 24 hours I don't have to sand with 220. I likes not sanding.
    Name:  Fok primer 4.jpg
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    Name:  MAM cabane rear socket Fokker C I.jpg
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  9. #199
    A little progress today on the wing spar brackets. First pic is after the first bend on the practice 3 mm thick stock. Guess the form could have been deeper but I am working with 3" wide 3/4" mandrel stock. This pic shows the mandrel completely pressed. Third pic shows that I pulled the mandrel out of the form and placed it on its side in the press. Fourth pic shows I still have a bit of spring back, maybe 3 degrees. The die forms are changeable since the two front spar brackets have this angle and the rear spar brackets have more pronounced angle. Now I have to make the form so that I can bend the ears in the opposite direction so that the brackets can bolt to the fuselage. This material bent very easily in the fixture that was made.
    Name:  Fok lower wing spar bracket fixture 2.jpg
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    Name:  Fok lower wing spar bracket fixture.jpg
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    Name:  Fok lower wing spar bracket fixture 3.jpg
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    Name:  Fok lower wing spar bracket fixture 4.jpg
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