Inverted Vantage
Formerly Unknown Target
- Joined
- Jun 19, 2008
- Messages
- 1,116
I'm working on my spreadsheet and just need something clarified about how to size the vertical tail; Raymer says to multiply the vertical tail coefficient (Cvt) by the sum of the wing's full span (b) and the wing's area (S), all over the distance from the 25% of the wing's MAC to the tail's 25% MAC. (Lvt)
Since I'm doing a tri surface, am I right in using that same equation, but making Lvt the distance from the aircraft's CG to the 25% of the Vertical Tail? Since the wing will be all over the place in a CG, and this equation seems geared mostly only for traditional configs where the CG is usually on or near the 25% of the main wing, I figured that the equation was just simplifying the wording somewhat and that it's really supposed to be to the CG. Can anyone help?
If this is wrong, how should I go about calculating tail size, independent of what configuration I'm doing (i.e. what's an equation that'll work with both a traditional and a tri surface?).
Thanks
Since I'm doing a tri surface, am I right in using that same equation, but making Lvt the distance from the aircraft's CG to the 25% of the Vertical Tail? Since the wing will be all over the place in a CG, and this equation seems geared mostly only for traditional configs where the CG is usually on or near the 25% of the main wing, I figured that the equation was just simplifying the wording somewhat and that it's really supposed to be to the CG. Can anyone help?
If this is wrong, how should I go about calculating tail size, independent of what configuration I'm doing (i.e. what's an equation that'll work with both a traditional and a tri surface?).
Thanks
