The Pawnee's capabilities in achieving high numbers of tows per hour is noteworthy. On one occasion at Lake Keepit, a Pawnee flown by Ian McPhee performed 84 aerotow launches in a single day.
Macca says -
Yes it was and it was a Friday in May '87 I think. After a wet week and was a Friday catch up. The previous week was 78. Those were the old days of 6 students a week.