How do rotor lengths affect how quickly a paper helicopter spins?

Subject: How do rotor lengths affect how quickly a paper helicopter spins?

Date: Mon Jan 15 14:47:42 2007
Posted by Georgia
Grade level: 7-9 School: Athey Creek Middle School
City: West Linn State/Province: OR Country: United States
Area of science: Engineering
ID: 1168897662.Eg

Message:


In an experiment I designed, I made three paper helicopters. They had rotor lengths of 8, 7, and 6 cm. The 
question was how would rotor length affect airtime, however, I noticed that the 6 cm helicopter spun much 
faster than the 8 cm one. The 7 cm helicopter was somewhere in the middle. Why?

Re: How do rotor lengths affect how quickly a paper helicopter spins?

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