[NSRCA-discussion] Impact

[Bob Richards]

Well, just to throw in one more suggestion.
   
  The leading-edge radius has a lot to do with stall/snap. The sharper the LE, the easier to snap. This is an easy thing to try, tack glue a 1/8" dowel down the LE of the wing, and cover over it with some tape or ultrakote. Start out with a piece that is about half-span on both sides, centered between the tip and root. If it helps, experiment with the length and position on the wing.
   
  Just remember when landing, a sharp LE makes it easier to snap. :-)
   
  Also, it has been my observation (which goes against what most experts will say) that a slightly nose-heavy plane is easier to do predictable snaps. Yes, a tail-heavy plane is more likely to snap when you don't want it to, and it is more difficult to stop the snap once it has started. This is NOT what we want in a pattern plane.
   
  A nose-heavy airplane will require more elevator throw for all maneuvers. The wing has to lift the weight of the plane PLUS the increased down force of the tail, required to overcome the nose-heaviness of the plane, so the stall speed increases when the plane is nose heavy. A tail-heavy plane should diverge more from the flight path than a nose-heavy plane during a snap roll for this reason.
   
  JMHO.
   
   
  Bob R.
  

John Ferrell <johnferrell at earthlink.net> wrote:
  Considering that it is unlikely that:
1- it is unlikely that he would have a set up problem
2-his skill level rules out pilot error
3- other Impacts work well
4-the servos have more than adequate power ratings

I think it likely the receiver battery is sagging. Try another, preferably 
1400mah(or more) NiCad.

John Ferrell
http://DixieNC.US

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