Wind Power - Div B
(section: 3 / paragraph: b / line: 1)
2015-11-12 15:33 Is the CD that the blades are mounted to only held on to the generator by the detent balls on a CD player or can extra support be provided such as double sided adhesive tape to strengthen the joint?
Yes, as long as the tape is easily removable and does not impact other subsequent teams' testing.
2016-03-04 16:07 Can holes be drilled in the CD such that the blades can be affixed to the CD with plastic nuts and bolts?
Yes, as long as the holes are filled with a fastener used to attach a blade. No holes or slots may be used for the purpose of reducing the mass of the CD.
(section: 3 / paragraph: b / line: 2)
2016-03-29 12:43 If the CD is sanded to create a rough surface so that it can bond/glue strong and firm to the blades, would this be considered a "modification of a CD"?
No, this would not be a modification of the CD. Light sanding to create a rough surface for gluing purposes only where the blade is mounted is fine. Sanding the whole CD is not allowed. The local event supervisor will determine if a modification has been made to the CD.
(section: 3 / paragraph: f / line: 1-2)
2016-03-29 12:34 The Rules state no part of the blade assembly may extend BEHIND CD for 3cm. This has been interpreted to mean that blades cannot be within 3cm both IN FRONT and BEHIND.
The limitation is only for the side of the CD that is facing the motor/generator.
(section: 4 / paragraph: f / line: 2)
2016-03-04 15:54 At what time in the testing is the final position of 5cm to be measured and Is this a construction violation ?
It will be measured just prior to the measurement period starting. The measurement period will not begin if it is closer than 5cm. There is no other penalty.
(section: 4 / paragraph: G / line: 2)
2016-03-04 14:58 May students push the blades by hand to initially get them spinning (if necessary) in the testing period, prior to the declared measurement period.
Yes, see 4.f. They may push the blades by hand to initially get them spinning but they may not touch the blade assembly during the measurement period.
and initially get them spinning.
(section: 4 / paragraph: l / sub-paragraph: ii / line: 1)
2015-11-12 15:35 Rules state that "Power generator general questions...."Does this refer to the general question of how electrical power is generated in each of these types of power plants or specifically to the generator itself?
Anything related to power generators in general is a valid question, which could include aspects of the power plants.
(section: 4.f. / line: 5)
2016-03-29 12:22 If during the 3 minute testing period, but not yet in the 30 second measurement period, the whole blade assembly falls off the mounting equipment provided by the event supervisors, can the students reattach their blade assembly?