SOSI 2013 CeAnn Chalker Matthew Chalker

Ballast Fuselage Horizontal Stabilizer/Stab Wing Launch Hook Vertical Stabilizer Fin Rudder

Chord Span

* Glider(s) up to 2 at Competition * Flight Log * Very similar to AMA event “Standard Catapult Launch Glider”

* Maximum Wingspan – 28.0 cm * Minimum of 3.0 grams * Maximum of 10.0 grams * Nose must be blunt * When inserted into a lip balm cap does not touch the inside end of the cap * depth~15.7 mm * diameter~13.7 mm

* Constructed of only wood, foam, covering, carbon fiber, glue, tape, thread, and ballast allowed * Ballast is any malleable, non-metallic substance * May be constructed from: * Published Plans * Student Designs * Commercial Kits * Kits MUST not contain any pre-glued joints or pre- covered surfaces * Gliders must be labeled

* Launch Handle (excluding elastic) * MUST be used * MUST be less than 1 meter long in any orientation * MUST be a safe configuration * MUST be operated by a Single Competitor * Elastic * MUST be non-metallic * MUST be In contact with the glider throughout launch

Minimum of 10 entries Minimum of 4 data points – Estimated Peak height – Length of Elastic (relaxed) – Flight Time – Any one other (more are fine) 10% deduction for incomplete Flight Log 30% for no Flight Log Most important part of practice and competition!

* Competitors MUST wear eye protection at all time when in the Competition Area * Launch MUST be aimed only towards the ceiling * Flight Period for Official Flights – 5 minutes * Starts with 1 st Official Flight * Official Flights – up to 5 using 1 or 2 Gliders * All flights within a Team’s Flight Period are official unless declared a trim flight prior to launch. * Steering is not allowed

* Start – * when Glider leaves the Launch Handle * End - * Any part of the Glider touches the floor (including pieces that break off) * When Glider stops moving due to an obstruction

* Highest sum of the team’s 3 longest flight aloft times (+/- Bonus or Penalties) wins * Ties broken by longest non-scored flight * Bonus – State & National – * Canard Configuration receives 30% bonus added to that flight * Penalties -10% flight time deduction for incomplete log, 30% deduction for none (off of each flight) * Construction & Competition violations for a Glider are ranked below all other teams

* Anticipate building many gliders throughout the year * Priorities * 1 Build quality/trueness/straightness * 2 Strength * 3 Weight * 4 (and a distant number 4) Design

* Use Carbon Fiber for reinforcement * Strong in Tension Only! * Fuselage Ideal Spot * Foam Meat Trays * Light Wings * Center of Gravity Critical

* Attach one end of elastic to Launch Handle and to Glider * Pull back the Glider to extend the elastic * Check the ceiling * Make sure you launch aimed at any point on the ceiling * Let Go of Glider! * Record Data! * Be prepared for repairs * Avoid grabbing a flying Glider from the air

* Trim for lowest sink rate * Stall – Too much lift * Wave pattern on descent * Dive – Too little lift * Goes down to fast * Adjust Center of Gravity (CG) with Ballast * Adjust Incidence by bending wood * Increased Wing Incidence increases lift * Decreased Stab Incidence increases wing incidence

* All about Sink Rate * Seconds/Ft * ~1 s/ft is good * Combination of weight and lift * Weight – Wood Selection, Build Quality * Lift – Trim, Build Quality, Design * Height achieved critical * Design will change (heavily) based on venue

LOTS of information: legacy.amaglider.comlegacy.amaglider.com Forums: Supplies Rubber: (buy 1/8” stock unless you have a rubber stripper) Various tools: Bulk Balsa: