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| Fuselage skins http://t18.net/thorpforum/viewtopic.php?f=2&t=7484 |
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| Author: | bruce [ Wed Dec 18, 2013 9:14 pm ] |
| Post subject: | Fuselage skins |
Hi all, Sorry if this has been covered before but I haven't found reference to it. I am building my fuselage with .032 side skins and was wondering if it is acceptable to use .025 for belly and top aft skins? I'm trying to limit the weight penalty but still have added strength. Any wisdom appreciated. Bruce |
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| Author: | jrevens [ Thu Dec 19, 2013 1:35 am ] |
| Post subject: | Re: Fuselage skins |
I believe that's normally exactly how you do it, Bruce... just the side skins .032, and the others you mentioned .025. |
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| Author: | fytrplt [ Thu Dec 19, 2013 1:47 am ] |
| Post subject: | Re: Fuselage skins |
If you are going to use a larger engine, it would be prudent to make the skin over the gas tank out of. 032. Mine is. 025 and flexes a little under load. I have an IO-360. |
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| Author: | bruce [ Thu Dec 19, 2013 9:59 am ] |
| Post subject: | Re: Fuselage skins |
Thanks John and Bob, that's what I wanted to hear. I will make the tank cover skin from .032 as well, think its 699 skin Bruce |
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| Author: | James Grahn [ Thu Dec 19, 2013 11:09 am ] |
| Post subject: | Re: Fuselage skins |
Bruce, My new plane is all .032. In addition, the engineer had us add 45 angles to the forward 4 boxes between the formers. Just FYI. Cubes |
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| Author: | jrevens [ Thu Dec 19, 2013 2:51 pm ] |
| Post subject: | Re: Fuselage skins |
bruce wrote: Thanks John and Bob, that's what I wanted to hear. I will make the tank cover skin from .032 as well, think its 699 skin Bruce That piece over the tank is also .032 on my T-18. |
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| Author: | dan [ Thu Dec 19, 2013 8:02 pm ] |
| Post subject: | Re: Fuselage skins |
The piece is over my tank too....Dan |
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| Author: | Bill Williams [ Fri Dec 20, 2013 5:50 am ] |
| Post subject: | Re: Fuselage skins |
I've wondered why the rivets were not long enough, N30WW is .032 all skins. |
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| Author: | Pacer 20 [ Sat Dec 21, 2013 9:32 am ] |
| Post subject: | Re: Fuselage skins |
My bottom skin is in 0,025. Be carefull with the 0,032.....the weight increase rapidly! 0.025 4'x12' 17.28 pounds. 0.032 4'x12' 22.13 pounds. I know is almost 5 pounds for a simple sheet but imagine for the entire plane.....I better to installed a stressed 0,025 skin versus a 0,032 with full of oil can wrinckle  The worst enemy of fast small palne is the weight!My 2 cents! |
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| Author: | James Grahn [ Sun Dec 22, 2013 8:30 pm ] |
| Post subject: | Re: Fuselage skins |
Yeah, Thierry, I wish I could have used something lighter. However, I had to keep it very strong due to its mission. The engineer suggested it. Cubes |
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