On Aug 17, 10:07 am, RN wrote:
This question is looking for legal (ie FAR) answers versus good
judgement.

Can anyone point me at the accuracy requirements for typical glider
instruments such as airspeed, altimeter, vario, and magnetic compass.
How much error is permitted before the instrument must be replaced or
repaired to keep the glider in an airworthy condition for VFR flight
in the US.

there are no inspection requirements for altimeter or airspeed for VFR
flight. IFR would require the static sytem be tested. compass has to
be adjusted to be within 5 degrees (i think) on any heading, and of
course the compass card has to be filled out showing the deviation at
various headings.