SOSI 2013

CeAnn Chalker ceann@chalker.org

Matthew Chalkerchalker7@gmail.com

Ballast

Fuselage Horizontal Stabilizer/StabWing

Launch Hook

Vertical StabilizerFinRudder

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 1st 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.com

• Forums: www.scioly.org

• Supplies - www.f1d.biz• www.indoorduration.com

• www.a2zcorp.us/store

• www.freedomflightmodels.com

•Rubber: www.faimodelsupply.com• (buy 1/8” stock unless you have a rubber stripper)

•Various tools: www.indoorspecialties.com

•Bulk Balsa:

•www.nationalbalsa.com

•www.Lonestar-balsa.com