WRIGHT STUFF.

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Presentation transcript:

WRIGHT STUFF

AGENDA INTRODUCTION AIRCRAFT TERMINOLOGY THEORY OF FLIGHT GLIDER DETAILS HINTS EXTRA--STARTING PLANS MAKE A GLIDER

OBJECTIVE TO DESIGN AND CONSTRUCT A BALSAWOOD GLIDER THAT WILL HAVE THE LONGEST DISTANCE (ms) OR FLIGHT TIME (hs) WHEN LAUNCHED FROM A HAND HELD CATAPULT.

MATERIALS BALSAWOOD. (why?) GLUE – ANY TYPE. MODELING CLAY. (purpose?) PAINT, STICKERS, INK, AND MARKERS MAY BE USED FOR DECO OR ID. (Small areas only)

RULES NO READY MADE KITS. GLIDER WITH CLAY BALLAST 1:1 DRAWING WITH ISOMETRIC AND PLAN VIEWS- Computer Aided Design (CAD) AND HAND DRAWN PERMITTED (hs) WING SPAN 10”min (MS)

RULES- (CONT’D) NOSE HOOK FOR LAUNCHING GLIDER A MUST. CATAPAULT WILL BE PROVIDED LAUNCH RELEASE Ht=6 ft. max 3 LAUNCHES- 2 BEST COUNTED MS- DISTANCE HS-Time of flight

4 FORCES OF FLIGHT

AXIS OF ROTATION

FLIGHT THEORY Newton’s 3 laws of Motion Inertia F=ma Action=Reaction Bernoulli’s Law of fluid flow (1730’s) K= ½ mv2 + PV + mgh (m/V=ρ) K= ½ rv2 + P + rgh

Tot. E=Kinetic E + pressure + potential E

Angle of Incidence

ANGLE OF ATTACK

DIHEDRALS

WHY DIHEDRALS?

GLIDER TAIL

TAIL FUNCTION HORIZONTAL STABILIZER-CONTROL PITCH- NOSE UP/NOSE DOWN VERTICAL STABILIZER- CONTROL YAW- LEFT/RIGHT

STABILIZER SIZES OUTDOORS- HORIZONTAL-1/5 AREA OF WING VERTICAL-1/3 TO 1/2 OF HORIZONTAL INDOORS- HORIZONTAL-1/6 TO 1/8 WING AREA VERTICAL- 1/3 TO ½ OF HORIZONTAL

HINTS READ RULES THOROUGHLY. NO SQUARE EDGES. STABILIZERS SMALL BUT NOT TO THE POINT OF INSTABILITY CENTER OF GRAVITY OF FINISHED GLIDER IS 1/3 TO ½ FROM THE FRONT EDGE OF THE WING. TAPERED BOOM. OUTDOORS USE GLIDERS HEAVIER THAN 10 GRAMS.

MORE HINTS FUSELAGE LENGTH EQUAL TO OR SLIGHTLY LONGER THAN WINGSPAN WING LOADING RATIO= GLIDER WEIGHT/WING AREA LOWER IS BETTER. CIRCULAR FLIGHT PATTERN (ToF) USE ‘TOOLS’ and ‘JIGS AND FIXTURES’ FOR DIHEDRALS, ETC. TEST DIRECTION and ANGLE OF LAUNCH USE ENGINEERING: DESIGN, BUILD,TEST KEEP LOG BOOK AND RECORDS

FLIGHT PATH

TROUBLE SHOOTING

MORE TS

REFERENCES A little Balsa Glider with a Good Yield www.4p8.com/eric.brasseur/glider2.html Aery Glider ‘Quick Build’ Instructions www.eng.cam.ac.uk/...glider/Aery%20building%20instructions.pdf AMA Gliders www.amaglider.vze.com/ FPG-9 (foam plate glider)

David Braunstein Email: David.Braunstein@csulb.edu Phone: (562)985-1464