2021 Power Known Sequences

The purposed known sequences for 2021 were presented at the IAC fall board meeting by Sequence program chair Michael Lents on November 14. The board approved the Primary sequence, which was not changed from the previous year, the Sportsman sequence and the Advanced sequence. The Intermediate power sequence was sent back to revise by adding a snap roll. The glider sequences will be presented at a later date.

The approved 2021 power sequences have been uploaded to the IAC website and are viewable by using your IAC member login. IAC>Competition>Sequences

The sequence committee members are made up of Jason Stephens-Glider Aerobatic Chair, Doug Sowder-Rules chair, Adam Cope, Rob Holland, John Morrissey, Howard Kirker and Matti Mecklin. They create the known compulsory sequences for use by all classes and categories during each IAC contest year.

There was a suggestion to reuse the 2020 sequences, however the committee saw room for improvements. Rob Holland and Adam Cope updated and tested several sequence to validate flyability and performance.

Comments by the committee in their recommendations;

Sportsman – fits with good energy through and no altitude issue with target aircraft.

Intermediate – the sequence presented to the board did not have a snap roll in it. Adam reported that if a snap-roll was preferred that one could be added into figure 1 – a P-loop. The board of directors returned the sequence to the committee to incorporate a snap as there had been feedback from intermediate competitors to have one in the sequence as there are snap rolls permitted in the Unknowns. The revision will be uploaded to the IAC website when it is approved by the board.

Advanced – flyability as evaluated by Rob and Adam. They mention that altitudes were not an issue. Adams direct comment, “Very good sequence. Started at 2500 and never went below 1200.”

Unlimited – Rob and Adam test flew the sequence. Adam indicated there weren’t any issues flying it in a One Design. He said, “Fun to fly and won’t beat you up to practice either. It flowed well and stayed tight and easy to position. I had about 600 feet to spare starting at 2500. Lowest was 900 on bottom of figure 5 then never saw below 1000".