Centuri Arcon-Hi parts list ST-1010 Sustainer airframe 10.5" long ST-105 Payload section 5.0" ST-103 Booster airframe 3.0" Note: Series 10 tubing had an O.D. of 1.04" PNC-106 Plastic nose cone 4.5:1 ogive BTC-10 Balsa tube coupler (solid bulkhead) HTC-10A paper tube coupler HTC-7CDH Passport staging coupler, slides over motor mount tubing ST-73 motor mount tubing 3" long, equivalent to BT-20 2 thrust rings for motor mounts 4 centering rings for motor mounts 2.25" x 0.125" launch lug 3" x 6" x 1/16" sheet balsa for Sustainer fins 3" x 11" x 3/32" sheet balsa for Booster fins screw eye for balsa tube coupler 1/8" elastic shock cord 12" parachute