On Thursday, June 18, 2015 at 5:41:40 PM UTC-4, wrote:
every 2-33 manual i have seen says mild aerobatcs to 80 mph can be done (1-5 in link below). To loop a 2-33 is not dangerous.

You sir are dangerously uninformed about aerobatics in Schweitzer gliders

Service Bulletin 'SA-003 Aerobatics in Schweizer Sailplane 25 Mar 1987'

supersedes the POH. Aerobatics are not approved.

A scan of the SB can be downloaded from http://www.klsoaring.com/index.php?o...tters&Itemid=6