On Wednesday, February 18, 2015 at 4:16:57 PM UTC-5, wrote:
I'd like to install a TE probe in the fin of my ASW 19.

What angle should the prob receiver be installed at on the fin?

It looks like most TE probes are installed so the probe is parallel to the horizontal stabilizer.

Is there an optimal spot on the fin to install the TE probe?

Thanks,

Nick

ILEC has a service bulletin describing where they recommend the probe be mounted. I will paste info here for your reference.


"Fitting of the tube: On modern sailplanes, a short brass tube which serves as the receptacle for the probe is mounted on the aft fuselage or, more commonly on the vertical stabilizer. These mounts are available from the dealer.

Be sure the inner surface of the receptacle is smooth, as any roughness will damage the o-ring seal. Lightly grease the inner surface of the receptacle. (Vaseline works well.) The bore of the receptacle must be smooth and within +.02 -.00 mm tolerance.

Position of the tube: It is strongly advised not to position the tube in the vicinity of the wing, or even worse, in front of the canopy. Such positions should only be used on very low performance gliders with a narrow speed range when no other way is possible. If you must mount on the fuselage, try to mount it at least one meter behind the trailing edge of the wing.

The position high on the vertical stabilizer is best. The probe head should be in line with the top of the vertical stabilizer, or in the case of T tailed gliders, in line with the horizontal stabilizer. Positions half way up the vertical stabilizer are normally not as good because of the airflow interference with the fuselage, tailplane, fin and the wake of the wing and fuselage.

Alignment: You may closely approximate the best position by making the probe parallel with the axis of the aft fuselage cone. A more precise method is to determine the inclination of the glider in flight with the help of a spirit level, at the speed of best glide. Level the glider in this position, and adjust the tube to be level. For fuselage mounts, the base of the stem should be perpendicular with the fuselage.

Orientation: On the fin, position the tube so the measuring head is pointed upward. For the fuselage mount, the holes should be pointed aft."