Rotor Egg Drop

(section: 1 / line: 3)

2014-02-28 11:45 Are feathers allowed as an attachment to a homemade wing or blade?


(section: 3 / paragraph: a / line: 1)

2014-02-28 11:47 In the sentence, "The device must use wings or blades that rotate around a central axis to slow the descent of the egg", does the "axis" have to be a physical axis (like an axle) or can it be conceptual axis (like the earth's axis)?

Either conceptual or actual is acceptable.

(section: 3 / paragraph: a / line: 4)

2014-05-08 21:09 Please define parachute and balloon.

Balloon - material that can be filled with air, to swell or puff out. Parachute - any material that fills with air and allows an object attached to it to descend slowly. Both definitions have in common the fact that materials fill with air. If the material on the rotors is not taut, then the device will be considered a parachute or balloon and may be placed in Tiers 3 or 4.

(section: 3 / paragraph: a / line: 4-5)

2014-05-08 21:16 Is a rotor device with curved wings (like the airfoil used in the helicopter event) considered a parachute? Can the wings of the rotor be curved but the plastic covering of the wing taut and the device considered legal?

The definition of an airfoil is any surface, as a wing, aileron or stabilizer, designed to aid in lifting or controlling an aircraft by making use of the air currents through which it moves. A rotor device may have curved wings with some type of material that is taut and completely enclosing both the upper and lower surfaces. If the curved wing is catching air and behaving as a parachute it is not allowed.

(section: 3 / paragraph: e / line: 1)

2013-12-19 08:54 Does the statement at the device must fit inside a 51cm cube in any orientation mean that the device must be able to rotate in all directions inside the cube? I don't understand the intent of the "any orientation" phase.

The entire device (with the cup), in both launch and flying configuration, must fit into a 51 cm cube in any orientation the student chooses. The entire device does not have to rotate in the 51 cm cube when it is being measured it just has to fit within the cube.

2014-02-28 12:12 Must the device be able to fit in the cube in any orientation the judge chooses? "Any orientation" could mean if it can be fit, it passes or that all orientations must fit.

Students will be the ones who choose the orientation of their device in the cube and place it in the cube for verification. Students must be the only ones to touch their device. As long as it fits into the allowed dimensions of the cube,in flying configuration which means with the cup attached, then it passes.

(section: Event / line: 1)

2014-02-28 11:56 Does the rotor have to revolve around a central axis a minimum of onerevolution? How is revolution defined (approximately onecomplete turn to be determined by event supervisor?)

The rotor should rotate at least once around a central axis or it could be determined to be a parachute or glider. It will be up to the event supervisor to determine whether the device has rotated around the central axis.

2014-02-28 12:05 If the students' rotor design does not encourage parts other than the cup to hit first, will the students be tiered if the cup is not what hits first due to causes out of their control such as air drafts/currents?

Students will be placed in Tier 3 or 4 if the cup does not hit first. Construction 3.d. "No other shock absorbing or cushioning materials can be used..." If another part of the device hits first it would act as a shock absorbing material.