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| Replica Aircraft Topics related to the construction of WWI replica aircraft |
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31 March 2014, 06:14 PM
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#1 |
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Observer
Join Date: Mar 2010
Location: Milladore, WI
Posts: 67
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Steel instead of aluminum tube.
Hi, I have a question. I have the full size Graham Lee N17 plans. I am interested in a welded 4130 fuselage instead of the aluminum. Can anyone point me in the right direction as to the relative strength of each material for the purpose of substitution. I assume if I made a fuselage out of steel the same size as the aluminum, I would end up with a tank instead of a plane. Any assistance would be greatly appreciated.
Dennis |
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31 March 2014, 06:34 PM
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#2 |
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Observer
Join Date: Mar 2014
Location: Las Cruces, NM
Posts: 3
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This link should have what you need:
Construction There are charts that show a direct comparison between 2024 aluminum and 4130 steel tubes. There are lots of resources on that page and I can't remember which book it's in but if you started with the TOC of ANC5 you'd be pretty close. Fritz |
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31 March 2014, 06:51 PM
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#3 |
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Forum Ace of Aces
Join Date: Aug 2005
Location: Marianna, Fl
Posts: 3,050
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Be careful with the full size Graham Lee plans. They were scaled up from the 7/8 size, but many of the dimensions were not scaled up. I found most correct sizes hand written and incorrect typed. Go through them carefully before you cut anything.
Can't help with the conversion from aluminum to steel. Dale
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Dale Cavin, Marianna, FL |
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31 March 2014, 07:05 PM
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#4 |
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Observer
Join Date: Mar 2010
Location: Milladore, WI
Posts: 67
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Thanks Dale, I have gone through those plans several times, I know what you mean.
Hey, could you send me a PM, I would love to give you a call after your busy tax season and pick your brain about your project. Thanks, Dennis |
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31 March 2014, 08:10 PM
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#5 |
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Forum Ace of Aces
Join Date: Aug 2005
Location: Marianna, Fl
Posts: 3,050
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Sure. Message sent.
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Dale Cavin, Marianna, FL |
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1 April 2014, 03:31 AM
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#6 |
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Forum Ace
Join Date: Mar 2006
Location: Carlisle, PA
Posts: 2,799
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Aren't the Graham Lee's built from 6061, not 2024?
rob
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Great War Aerodrome In the air, over there... 
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1 April 2014, 04:13 AM
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#7 |
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Forum Ace of Aces
Join Date: Aug 2001
Location: Ft. Worth, Texas
Posts: 3,241
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That is correct Rob.
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Brad No war for environmentalists! Drill here! "My point is that KILLING BABIES ON PURPOSE IS NEVER OKAY. " - Craig "Not even before they are born! " - ME "Is nailing Jell-O to the wall productive?" - Barker |
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1 April 2014, 05:41 AM
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#8 | |
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Forum Ace
Join Date: Mar 2005
Location: Virginia Beach VA
Posts: 661
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Quote:
Hank |
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1 April 2014, 08:49 AM
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#9 |
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Observer
Join Date: Mar 2014
Location: Las Cruces, NM
Posts: 3
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These charts don't cover 6061 tubing (I'm sure others do) but the "difference" would be in your favor. Worst case it might cause you to use a slightly heaver steel tube than you needed.
These charts assume the tubes are straight. I don't know how you would allow for curved tubes like the lower longerons on the Nieuport. |
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1 April 2014, 01:37 PM
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#10 |
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Forum Ace
Join Date: Oct 2003
Location: Kettering, Ohio
Posts: 2,127
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The tubes are only in compression or tension for a box structure.
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