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| Wing Profile http://t18.net/thorpforum/viewtopic.php?f=3&t=8303 |
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| Author: | rrobut [ Fri Jan 11, 2019 1:41 am ] |
| Post subject: | Wing Profile |
I am a little confused. The nose rib drawing that came with the S 18 plans shows that the profile is the 63-412 airfoil with dotted lines towards the front indicating that these lines are for the LDS-4-212 airfoil. However the profile sheet in the plans (for the LDS-4-212) does not seem to match when I try to plot the numbers on the plan drawing. That is assuming that station 1 on the sheet is the leading edge of the nose rib. Thanks for the help. Rob |
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| Author: | Jeff J [ Fri Jan 11, 2019 5:03 pm ] |
| Post subject: | Re: Wing Profile |
Is it close enough that the scan could have gotten a little skewed and/or the paper changed size with humidity? I used to see both when I was into RC airplanes. |
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| Author: | James Grahn [ Sun Jan 13, 2019 7:38 pm ] |
| Post subject: | Re: Wing Profile |
Sorry. I’ve been out of pocket for a bit. Although I’m not sure I can answer your question anyway. The S18 should be the LDS 4-212 airfoil. The station numbers are in reference to overall station, ie prop flange. Does that help? Cubes |
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| Author: | rrobut [ Mon Jan 14, 2019 6:42 am ] |
| Post subject: | Re: Wing Profile |
Thanks Cubes. My question is answered. At least I know which profile to use Rob |
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