I guess I'm not sure whether moving the CG aft will change the absolute
stall speed but I can tell you that, up to a point, your approach speed can
be much slower with an aft CG than with a forward CG. Our sailplanes are
still quite flyable with CG's quite a bit aft (even aft of neutral). If
you shift your CG aft slowly (about 1/2 oz at a time) with several flights
at each increment you will not like the way the plane flies long before it
becomes unflyable. Beware of those who add and remove nose weight in
unmeasured gobs and then pronounce planes to be unflyable with an aft CG.
You might want to start out taping a quarter to the tail boom. Start right
behind the wing TE and move it 4" aft at a time. Depending on your current
CG you may end up with the first quarter just in front of the vertical fin
and have to start again with another.
Hope this helps.
Rick
At 11:36 AM 5/12/00 -0700, Bill Palmer wrote:
>I need a little help from the experts. I know I know the answer to this
>question but I can not pull it up from the gray matter.
>
>Does changing the CG on a TD ship change the stall speed of that plane?
>
>I know stall speed is a function of airfoil, wing planform, and wing
>loading. I also know that CG is a function of stability. I am not sure if
>cranking the CG back on my Edge will increase the stall speed so I have to
>make a faster approach.
>
>Thanks in advance for the expert advice. It is always appreciated.
>BTW....no my Edge is not under 40 OZ.
>
>Bill Palmer
>West Covina, CA
>
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