Download - Physics Students Design Model Airplanes
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Physics Students Model AirplanePhysics Students Model Airplane
Design Challenge 2010Design Challenge 2010
By Bill KuhlBy Bill Kuhl
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Early January of 2010 I helped a science teacher friend
with anassignment forhis physics students to design,
construct,and fly arubberpowered model airplane. Ihelped for two class sessions; the first to show sample
planes I had built and explain designapproaches such
as hi-aspect ratio, dihedral, winglets, target weight,and
wing area. Students were given suggested formulas for
sizing the surfaces based on the wing area. I thenreturned the end of the week to help with the flying.
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Two variations from the basic Denny Dart design.
ExamplesExamples
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Hi-aspect ratio version of Denny Dart in flight.
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I brought a Squirrel model plane forshow but this one was built by
the designer, Darcy Whyte.
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Students built theirplanes on cardboard, I preferto use ceiling tile.
BuildingBuilding
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Hi-aspect ratio wing with under-chamberairfoil,at least a couple of the
students took this approach and theirplanes flew well.
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Wing tips were extended behind the rest of the trailing edge.
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This student forgot the vertical fin, hopefully that was corrected.
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This student built a smallerplane with high-aspect ratio and tip dihedral.
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FFlying
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These students were very good about working together,and traded off
being the stooge while the plane ownerdid the winding.
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A couple of years before this, the physics students were
given the same assignment but they had less instructionon what was important fora good flight. There were
many clever ideas, but not many of these planes flew
very well.
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Flying wing on the left must have been influenced by the Stringless
Wonder. Planes on the right were too heavy for the rubberand
propellerused.
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The biplane might have flew if there was not so much curve in the airfoil
which caused too much drag.
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Very interesting twinmotordesign, with more stability it might have
flown well.
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