Reading Assignment: Chapter 4 in Shop Class as Soulcraft
New Terminology
- Drive Chain: transfers mechanical power to the wheel
- Staked: when a tapered pin is whacked, deforming the metal to lock the nut in place
- Arbor Press: a machine used to apply pressure. Can be used to stake.
- Swing Arm: part of the suspension system, allowing the rear wheel to swing up
- Gasket: seals the cylinder together
- Motor-Generator: converts DC power-> mechanical -> DC Power
- AC vs DC: in DC, electrons flow from negative to positive. Batteries are DC. In AC, the current alternates. AC current can step-up or step-down in voltage with the help of transformer. This helps it travel over long distances. Different applications of DC and AC current, but generally DC is specialized
- Feed and Return Line: feeds and returns oil in and out
- Crank: two gears on transmission with a nut
- Cast-Iron: a metal that absorbs oil well
Recaps from 2/19 Lab
- Clutch: Removed everything from the engine casing. Used 1 1/2 inch wrench and a strap-wrench to remove a staked nut. Took out the drive sprocket and the gear from the transmission.
- Frame: Finished disassembly, removed sleeves holding ball bearings. *need to count the number of balls. Removed a pin from the swing arm. Washed parts in solvent WITHOUT GLOVES.
- Top-End: Removed 2nd valve spring from rockers. Used a telescoping rod to measure the inside of the cylinder. Going to have to sand-blast the inside.
- Electrical: Worked with circuit and rotor. Made an electrical diagram
- Bottom-End: Got all the components out. Cleaned parts with orange oil
Book Discussion
*means motorcycle reference
Zen and the Art of Motorcycle Maintence
- Did an experiment with a ping-pong rocket. Showed how fuel and air can create high pressure for an explosion. Ball acted as a piston in this case
- *Porcelain insulated on the spark plug. Carbonized. This was because of high altitude led to less Oxygen and too much fuel (fuel rich). Need to readjust
- *Connecting rod fit to the crankshaft needs to be precise other wise the force of the explosion will break the rods
- The idea of steel being seen as shapeless by those who do steel work. It can be any shape when you are skilled, and any shape besides the one you want when you are unskilled
- Inductive vs Deductive reasoning. Inductive is “bottom-up,” inferring general propositions from specific examples. Deductive is “top-down,” where specific examples are derived from general propositions. Mechanics must use both
- The Scientific Method: seems tedious and self-evident, but the caution is so that you do not make a mistake. Nature will make a fool out of you. The real work isn’t physical but learning the ask the right questions
- *when removing plug, lay against engine to ground it. Start lever and see if there are blue sparks. Will let you know if there is or isn’t an electrical failure.