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2004.10.12-19:
- Consider methods to build rotors that can rotate in opposite directions (so that there will be no tendency for the balloon to spin), but will provide exactly the same lift (so that the balloon will not tend to tip). If possible, bring sample rotors with you.
- Consider methods for controlling the hovering blimp: how to hang the mass that adjusts the tilt, how to move it around, and how to control that motion.
2004.09.21:
- How would we find the angular speed of a motor, using the sensors we have (e.g. rotary motion sensor)? That is, what calculations will be needed in addition to the sensor measurement itself? If possible, do the measurement.
- How would we find the torque a motor can provide, using the sensors we have (e.g. force sensor)? That is, what calculations will be needed in addition to the sensor measurement itself? If possible, do the measurement.
- General design ideas
- General equipment ideas: what to use, where to get it, etc.
- Other points of interest
2004.09.14: As discussed in first meeting:
- Find an equation for the payload mass a party balloon provides, in terms of measureable items and some reasonable estimates.
- Guess the payload mass of a party balloon, based on personal experience. (And perhaps some observations with equipment we have in the lab.)
- How would you measure the payload mass of a party balloon directly, using the tools in our lab?
- For the rotor toy we have, calculate the angular speed at takeoff (based on reasonable assumptions and/or measurements). This will give us a ballpark estimate for the a useful angular speed for the motor(s).
- Suggest some benefits and drawbacks of using mylar vs. using rubber for the balloon skin.
- Suggest some benefits and drawbacks of using helium vs. using hydrogen to fill the balloons.
- General design ideas
- General equipment ideas: what to use, where to get it, etc.
- Other points of interest
2004.08.13: No assignments yet!
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