This is perhaps the best general purpose antenna. Suitable for medium range and altitude, this antenna has lower isotropic gain (2.15-1.5) however has a very uniform radiation pattern. It allows for best signal when doing stunts such as loops and rolls without loss of signal. Polarization is also less of a problem.
Mount this with the open side of the Vee facing the nose of the airplane when flying distance as this will give a stronger signal for the return trip. Mount it with the Vee facing sideways for stunt flying As this will help keep the antenna in polarization better.