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Sky9pilot
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Re: Fuselage Assembly Fixture
Reply #6 - Apr 22nd, 2019 at 5:23pm
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Thanks for the link Alfakilo...we encourage everyone to consider becoming a member of FAC (Flying Aces Club) for that newsletter and all the fine information and plans that come out every two months.  I'm really glad they are making the past issue available online as well.  Thanks again for the link.
Tom
  

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alfakilo
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Re: Fuselage Assembly Fixture
Reply #5 - Apr 22nd, 2019 at 10:00am
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Good tips!! I use something similar for all the reasons you mentioned.

Here's an article that describes another look at the idea. The author includes techniques and tips that are often missing. Article starts on page 20.

http://www.flyingacesclub.com/Newsletters/FACN270.pdf



  
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Re: Fuselage Assembly Fixture
Reply #4 - Apr 22nd, 2019 at 6:44am
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Hi Bob - I used the readily available stuff that's about 1/4" thick and about 18 x 30 inches, maybe enough for 2 fixtures. Got mine at our local Dollar store. Was thinking about this post and decided I didn't mention that this stuff is incredibly light and hard to control and slides around easily. I had originally put feet on mine but was a total waste of time. At one point I actually considered throwing it away and moving on but persisted and discovered the best way to use it is to lay it on your lap and work comfortably. One of my persistent problems is getting the stringers straight and now this fixture allows me to pick it up and sight down the line and make adjustments. I'm sure there are other benefits but for the moment it is a pretty good solution for anybody that wants a tool like this.
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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bigrip74
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Re: Fuselage Assembly Fixture
Reply #3 - Apr 21st, 2019 at 11:35am
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It does look simple even for a Texan, I think that I will try it on my next build that requires a jig.

I guess I did read your description completely. When foam board are you using?

Bob
  

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Re: Fuselage Assembly Fixture
Reply #2 - Apr 21st, 2019 at 10:45am
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Simple, inexpensive, and rigid - I like it!

Mike
  
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Re: Fuselage Assembly Fixture
Reply #1 - Apr 21st, 2019 at 8:12am
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More...

In the next picture, I put the cutout back in with the fuselage still attached.
Picture 6 is the taking of the measurements from the plan. Only the height from the thrust line is needed.
Picture 7 is the marking of the height of the former on the station upright.

At this point I got ahead of myself and forgot to take pictures of the attachment of the formers to the station uprights. To do this, I added a small drop of glue to the former and glued it to the front of the station upright. So before everybody gets too excited, this small bit of glue will let the former be detached without any damage. I know this as I have knocked off about half of the formers adding the stringers. Be sure to line up the top of the former with the measure line added earlier. I also cut the top and bottom notches and used a small piece of 1/16 to align with the upright. So, now you have a fuselage tool that can be used in hand, laid on your lap or put it on blocks on the workbench. It is also open on both sides so stringers can be added alternately. I plan to not add the top and bottom few stringers so I can cut the formers away from the uprights and add them later.

Hopefully this tool can be created and used by anyone that wants a fuselage fixture with a minimum of expense, just a trip to the Dollar store for foam board. I know the explanation given is a bit long and involved but I think it will all come out well.
  

( 88 KB | 25 Downloads )
Taking_Measurements.jpg
( 54 KB | 24 Downloads )
Transfering_Measurements.jpg
( 59 KB | 24 Downloads )
Fixture_In_Use.jpg

"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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Fuselage Assembly Fixture
Apr 21st, 2019 at 7:50am
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Sometime back I devised and built a fuselage assembly fixture and it worked very well, trouble was, only about 3 or 4 people were equipped to replicate one and this bothered me, as it seemed, at least to me, that I had not done anything to benefit the group as a whole. So, I was trolling around the model airplane fishing pond (internet) and discovered another good solution. It should be noted up front this is not my idea, I only took the idea and put it into a series of pictures to see if it would actually work, and it does, so here we go.

Picture 1 is the original plan I am using and is a Howard DGA3 by Dave Rees.
Picture 2 is the plan modified for use, my way.
Picture 3 is the fuselage portion of the plan taped to a sheet of foam board that I marked a center line (the thrust line of the plane) and added the plan to match the center line.
Picture 4 shows the marking of the station lines on the foam board. These lines must be the back of the station (see picture 5) I also added an outline of the fuselage at the station lines 3/4 inch away from the fuselage and cut it out. Add the station uprights, I used 3/32 square and glue them to the foam board.
  

( 135 KB | 31 Downloads )
Original_Plan.jpg
( 91 KB | 29 Downloads )
Ready_For_Work.jpg
( 59 KB | 28 Downloads )
Fuselage_Layout.jpg
( 64 KB | 37 Downloads )
Marking_Stations.jpg
( 68 KB | 26 Downloads )
Adding_Station_Upright_Closeup.jpg

"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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