Agenda:
- Updates on shop progress
- Dynamometer Demo
- Readings
Bottom End
- cleaned engine case
- used arbor press to remove sprocket bearing, took seal out (needs replacing)
Clutch
- need to go to bunker to find some new parts (oil reservoir cap)
Electrical
- finding lights online
- polished parts
Fasteners
- remeasured engine cover
- completed Creo tutorial
Fork
- measured forks
- removed wiring from handlebars, removed grips from handlebars
Frame
- worked on taking apart rear struts
Top End
- sandblasted and scrubbed
- next step: cut gaskets
Wheels
- opened and cleaned rear hub
- replaced rear wheel bearings
- *important to make sure all parts are clean before they go to the powder coater
Dynamometer Demo
- force- units: pounds, Newtons
- torque- rotational force (foot-pounds, Newton-meters), r*f
- power- energy per time (Watt, foot-pounds-per-second), or force*velocity
- work- force*distance
- one horsepower = 33,000 foot-pounds/minute (about 750 W)
- dynamometer- what is the torque? what is the power?
DeProny brake, or brake dynamometer
- measures torque vs rpm (angular speed)
- find angular speed at which your motor generates the most power (which is why we have multiple gears)
Takeaways
- Torque is turning force
- Work is force*distance
- Power is force*velocity
Readings
Zen, Chapters 7&8
- Motorcycle references
- Jets— oversized vs standard (use oversized/ pilot jet when idling)
- size of hole determines air flow vs gas flow
- At higher altitudes, oxygen is lower— needs less fuel
- Spark plug— when “fouled”, covered with carbon— too much fuel
- Chain— is running “hot and dry”— evaporating lubricant immediately
- Cam and Tappets— made of hardened steel, because they take the brunt of the force
- Need to adjust tappet/ cam shaft clearance when cold (when parts are warm, it stretches)— valves need to close fully
- Jets— oversized vs standard (use oversized/ pilot jet when idling)
- Content
- revisiting classical/ romantic
- understanding thoroughly loses some beauty (Mark Twain—lost the beauty of the river), but there is also beauty in learning how things work
- reconciling two viewpoints
- “ghost of rationality”
- rationality is not always beneficial
- ethics— can rationality be applied? (utilitarian)
- effects vs causes
- “He was systematic, but to say he thought and acted like a machine would be to misunderstand the nature of his thought. It was not like pistons and wheels and gears all moving at once, massive and coordinated.”
- whole vs individual
- Steel
- “Steel can be any shape you want if you are skilled enough, and any shape but the one you want if you are not.”
- revisiting classical/ romantic