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Dsyvert(at)aol.com
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 Posted: Sat Jun 23, 2007 5:05 pm Post subject: Potential Gotcha on HS stabilizer attachment (looking for co |
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Group,
Attached is a problem that I had, and would never have caught had I not had an experience builder look over my project. It is not the type of thing I would think most builders would catch or understand the implications unless they would know that there could be an issue.
Please review what I have put together and comment. Sorry that the drawings and explanation may not be completely clear so I would like to hear you comments and will change based on everyone's feedback.
Dave Syvertson
40625
See what's free at AOL.com.
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Horizontal_Stabilizer_-_Gotcha.doc |
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KiloPapa
Joined: 24 May 2006
Posts: 142
Location: Pearblossom, CA
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| Posted: Sat Jun 23, 2007 8:44 pm Post subject: Potential Gotcha on HS stabilizer attachment (looking for co |
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Thanks for taking the time to do the write-up. As I am not there yet I will take note of it when the time comes.
Kevin
40494
tail/empennage
do not archive
[quote] ---
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Kevin
40494
do not archive |
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greytex
Joined: 29 May 2006
Posts: 28
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| Posted: Sun Jun 24, 2007 7:38 am Post subject: Potential Gotcha on HS stabilizer attachment (looking for co |
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<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Nice catch Dave
[quote] ---
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Dsyvert(at)aol.com
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| Posted: Sun Jun 24, 2007 1:50 pm Post subject: Potential Gotcha on HS stabilizer attachment (looking for co |
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Group,
Thanks for the comments. Here are a few additional thoughts I have:
1) I think my calling it a gotcha is incorrect. A better name would be best practices. Gotcha assumes something is wrong either with the instructions and/or the kit which is not the case. Best practices would be to get a better product. So.. in putting this portion of the project together it would be a best practice if there is no stress to begin with. I think something similar to my procedure would do that. If you are even off 1/64" then it will be under stress when you tighten up the bolts to the longeron. Better not to start with stress to begin with.
2) When building these planes, there are parts/steps that are more critical than others. I believe this is one of the more important steps that I have found so far. Eventually 4 bolts in front and 4 bolts in back hold most (but not all) of the tail assembly together (HS, VS, Rudder, Elevators). Part of my purpose was to point out how important this step is to the assembly.
3) What Tim said got me thinking about an alternative way. What I did (originally) was mark using a fine point sharpie the 1/8" line. I just measured the thickness of a line created by a "fine" point sharpie, it is 4/64" wide or 1/16" wide. Not real accurate. I thinks a better way (if the 7 holes are drilled during step 2 on page 10-4) would be to use the 1/8" bar (F-1010-B that is not fabricated till step 3 on page 10-10) on top of the angle "iron" so that it is flat on top of the bulk head and use another flat piece across and then drill the 7 holes. Then I believe a near perfect clearance would be obtained. I would suggest looking ahead to page 10-11 on the drawing section A-A to where the longeron is fit.
Thanks for the comments and would be interested in more.
Dave Syvertson
40625
See what's free at AOL.com.
[quote][b]
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