I've towed a Primary with a Rallye 180T. I was flying the Rallye at an
indicated 45 knots. The Primary pilot told me that it was too slow! It turns
out that the Rallye's ASI over reads at low airspeeds. The true airspeed was
nearer 35 knots! With full flaps and the leading edge slats out, the Rallye was
reasonably easy to control. With the extreme nose up attitude, forward
visibility was non-existant. Needs to be done on a reasonably cool day to avoid
overheating.