This escapement wheel is a good example of showing how simple machines work together in the performance of a task, in this case turning a flywheel. I have found that students have a natural curiosity to explore these types of devices and are very interesting in learning more about concepts such as energy, work, forces, friction, and mechanical advantage of simple machines as they are in operation. I've included some other devices and ideas that I've also found to be good teaching tools.
Here is a list of the Videos of other devices shown during presentation
Cardboard ramp walkers [ Ссылка ]
Combination lock. [ Ссылка ]
Trebuchet [ Ссылка ]
Trebuchet [ Ссылка ]
Reciprocating air engine hand powered. [ Ссылка ]
Reciprocating air engine compressed air powered [ Ссылка ]
Toy and machine dissection. [ Ссылка ]
Flag waving machine [ Ссылка ]
Simple air engine. (not shown) [ Ссылка ]
Simple and compound pulleys (not shown). [ Ссылка ]
Lever toy (not shown) [ Ссылка ]
Rubber band powered car. (not shown) [ Ссылка ]
Questions
1.Draw a flow chart that follows possible energy types from the with origin, to power the device, and ending with the final form.
2.Identify each simple machine and if it has a mechanical advantage.
3.What was the purpose of having the weight supported by two strings instead of a single line?
4.Identify how the force changes as it progresses through device.
5.Identify the class of lever for the locking tooth lever, how does the class change as it is in operation?
6.Identify the pivot point, effort and resistance of the lever.
Identify the class lever is the whole pendulum?
7.If we cut off the top part of the pendulum, it would still act as a lever, identify the class, the fulcrum, effort, and resistance is the upper section of the pendulum were not attached to the wheel
8.Identify the pivot point, effort and resistance of the lever with the stop tooth.
9.How does the force change due to the size difference between the escapement wheel and the wheel with the applied force?
10.What would be the effect of changing the size of the wheel that the string is wrapped on? How would this effect the force on the escapement?
11.Why do the extensions on the winding wheel make it easier to turn?
12.What is the effect of applying force near the hub on the flywheel?
13.Verify the change in force using a spring scale for the weight of the force applied to the escapement wheel. Determine the ideal measurements versus what was found and explain the differences.
music used in video. Apple iMovie free file. carousel
video clips used in video
Piano escapement anamationfor pianoworld.com
CC Anchor escapement created by Chetevorno
CC Lever escapement created by Mario Frasca
CC Grasshopper escapement, developed by John Harrison
CC Coaxial escapement developed by Adithyamic gaming..
