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Round Tube Spars with leading edge sheet

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Mohanakannan

Active Member
Joined
Feb 6, 2013
Messages
42
Location
Chennai, Tamilnadu, India
Hello Every one

I have attached a construction picture bellow of an aircraft I found while I was browsing. The name of this aircraft is Glen Marshman’s RANS S-9 Chaos and I found that in this page EAA - EAA Experimenter - Glen Marshman's RANS S-9 Chaos. Here I see the designer has used both the round tube spar and a leading edge sheet, I have not seen this type in other designs.

The reason I assume is that, during a simple bending the structure undergoes compression on the top most fiber and tension on the bottom most fiber. If they use a sheet that runs above the round tube spar I guess the tension and the compression would be taken by the sheet and not the round tube spar. If the sheet cannot resist that stress it would fail. Can any one clarify my doubt on this and how the load is exactly transferred. I have attached the pictures bellow.

Thanks in advance for your valuable answers.

Thanks & Regards
Mohan
 

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  • Doubt.jpg
    Doubt.jpg
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  • 24992_SIMPLE BENDING THEORY.JPG
    24992_SIMPLE BENDING THEORY.JPG
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