Using aluminum 2024 t3 as spars?

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Merlin

Well-Known Member
Joined
Nov 17, 2020
Messages
51
I appologize if i'm posting this in the wrong section of the forum.
i'v been stuck trying to figure out how to design a proper wood spar for few weeks now, i came to the conclusion that the material was too unpredictable for me and i just don't have the necessary "wood skills" to trust myself with it.
so i decided to switch to aluminum 2024 t3, round tubes. (like the one in the picture)
clamp up.jpg

can you give me some tips about it? ideal diameter, best way to attach struts and ribs to it, how to protect it from corosion.

Thank you.
 

proppastie

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Log Member
Joined
Feb 19, 2012
Messages
4,944
Location
NJ
If you can not copy a successful design and/or are unwilling to learn loading and stress analysis this is not a good idea in any material.
 

ElectricFlyer

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HBA Supporter
Joined
Dec 16, 2015
Messages
81
Location
Richmond Hill, Ontario, Canada
best way to attach struts and ribs to it
This is what I meant by sleeve - in this case there is only one spar - it will go through this sleeve on the ribs - several high shear rivets through the sleeve to the spar and your flying tomorrow🤣
This particular rib is shown from vid of a Kolb build by Viktors Zarskis .
1609640296617.png

The more I see the Kolb Ultrastar the worst my itch gets to built one. Fairly certain my Simonini 200 would get it off the ground.
I am wondering the main tubes could be swapped out with CF ones.

Anyway -- this may be a good build for you. Looks fairly easy as far as plans builds go.
1609641125639.png
 

Merlin

Well-Known Member
Joined
Nov 17, 2020
Messages
51
This is what I meant by sleeve - in this case there is only one spar - it will go through this sleeve on the ribs - several high shear rivets through the sleeve to the spar and your flying tomorrow🤣
This particular rib is shown from vid of a Kolb build by Viktors Zarskis .
View attachment 105843

The more I see the Kolb Ultrastar the worst my itch gets to built one. Fairly certain my Simonini 200 would get it off the ground.
I am wondering the main tubes could be swapped out with CF ones.

Anyway -- this may be a good build for you. Looks fairly easy as far as plans builds go.
View attachment 105844
Thank you
 
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