Reading for March 4, 2015:
Remainder of Ch4 and all of Ch5 of Soulcraft
What happened in lab last week?
1) Cleaning parts and worked on the clutch lever internal to the engine, which is in good condition compared to previous years.
2) Looked at the distributor and found a spare distributor that would work for our motorcycle. The distributor that controls how far it can turn and controls the spark had to be evened out.
3) Sandblasted the frame, which is a challenge because the frame has a lot of paint caked on, especially in the joints. The sandblasters were not working well but they have been fixed for this week.
4) Cleaned the oil line, oil filter, and bottom end. Also cleaned the exhaust pipe.
5) Trying to decide which speedometer gears would fit the best on the motorcycle.
6) We ordered two throttle cables but we had the other cables.
7) Learned how to use the drill press.
8) Cleaned the wheels.
Assignments:
Gaskets (Cad software to make new gaskets): Mark
Oil Pump and lines: Mary Kate and Leslie
Front Mudguard (Fender): Caitlin and Jamie
Wheels:
Fasteners (Engine): Phil
Headlamp and Switches: Mun
Points: Kate
Covers (Primary Cover and Point-Side Cover):
Fork Tubes: Francesco
Clutch: Devon
Transmission: Samone
Battery Wiring: Jay
Class Demonstration:
Rotor and stator have two wires coming off, which generate AC voltage. As the timing is adjusted, the brightest spark happens when the most current is flowing on the oscillating graph.
When the switch was opened in the circuit there is no longer any current, the magnetic field collapses and produces the back voltage, which is then applied to the primary transformer. This creates a large pulse of voltage sent to the secondary transformer, which creates a spark.
Essentially, if the timing is incorrect, there will be no spark.
Class Discussion about Shop Class as Soulcraft Ch5 pt1:
Motorcycle References:
Parts Cleaning: The author’s first job, he is restricted to cleaning and he comments that he is not to clean the gasket surfaces so he does not create grooves for oil to slip through.
Packing a bearing: He has the grease on the heel of his hand and pushed the grease in between all of the balls so that the bearing has enough lubrication and it is not forced to lock or seize.
Low compression in cylinders: When compression is lost the piston does not move all of the air up, some of the air escapes down the sides and you lose power.
Gas shocks: A pneumatic type of shocks, which absorb impact.
Match ported the Intake Manifold: Assuring that the ports of the intake manifold and the cylinders are compatible and that the diameters of the two pieces are equal and centered.
Mushrooming: When the top of a piece of metal has a “mushroom” shape, this is an indication that something has gone wrong, either purposefully or accidentally.
Crank Journals Nitrited: A treatment to the steel that makes the steel hard, which enhances engine performance.
Content:
Two types of disposition: Careful and Commanding. The author believes that this classification can tell people what kind of profession to pursue. Personality goes with profession.
String Theory: It is possible to untie any shoelace knot by just pulling on one end. His father is thinking about things in a mathematical reality that may not be practically efficient.
Skeleton Drawing: When he first viewed the skeleton he drew it as a sort of cartoon. When it was turned on it side, a view he was not accustomed to, he drew it just as he saw it.
What happens when you pull out the threads of a hole?
You drill an oversized hole and thread it. You then match the threads with an “insert” and thread the new screw into the “new hole”
M.B.