Last Time:
What did we do in Shop?
Wheels: used yield to loosen screws, break up rust, removed wheels
Fork: removed and disassembled fork, discovered that fork is used for suspension and that there’s a spring on the inside of fork, unique to this tiger cub because it has internal and external spring. Kept track of ball bearings
Noted serial numbers to show that frame number and engine number match, shows that it’s original
Top end—took engine off frame, started disassembly
Frame—took off rear suspension
Bottom end—took off oil lines, engine from frame
Clutch—working on casing of clutch side of engine Interesting technique: threaded rod at both ends, loosed nut and shaft stayed in engine block, needed to remove it so we used jam nut to lock two nuts to threaded shaft, and then used wrench to unscrew from the base
Note—we’re not certain that the way we take it apart is the way it’s supposed to be! Have to use manuals and common sense, because people have taken this apart before
Important Info on Blackboard
Tiger Cub Bible–intro, history, general information on tiger cub, gives diagrams of different systems within motorcycle and gives evolution of those systems (We have a T20SC)
Troubleshooting guide–when things aren’t working, good reference
Workshop Manual – tells you how to disassemble and reassemble parts, targeted at our motorcycle
Important Info on our own Site
Shop Manual–Triumph’s manual, how to take it apart and specifications of motorcycle
Online Guide – tells you how to listen to engine to diagnose problem
If you were talking about how a motorcycle worked to a five year old, what would you talk about?
Explosion of gasoline (C8H18) in the presence of air (O2), produces carbon dioxide, water vapor, and heat, which raises temp to about 2000 degrees kelvin, pressure increases a factor of 7, pressure pushes piston, that’s why CO2 and water vapor come out exhaust
Discussion
Chapter 3 ZAMM:
Motorcycle references
Tachometer—measures engine speed, our motorcycle has a max of 6000 revolutions per minute
Speedometer—measures how fast motorcycle is going
Resistance—reduce frontal area and resistance by dropping head, important because we’ll need to pay attention to drag and wind resistance
Storyline
Phaedrus is his prior self, had been to this place where the narrator is, but narrator doesn’t remember—slows down because it’s a familiar sight, déjà vu, goes into discussion about ghosts
Says he doesn’t know any ghost stories, but he does about Phaedrus (didn’t want to tell his son). Not real, due to science, but they’re real because they’re real in people’s minds.
Are things real if people haven’t thought of them yet? Gravity didn’t exist until Newton came up with it. It’s only there once we think of it.
Our class said: just because someone hasn’t defined it yet doesn’t mean it doesn’t exist, equating law of gravity to a material thing, strange argument
Professor Littman—gravity is a human creation of a concept, and the law of gravity we have right now could be different 100 years from now. Basically, we’re not sure that gravity exists as we conceive it!
Chapter 4 ZAMM:
Motorcycle references
Engine, oil level and tires, bolts, chain tension (need to tighten it up)
What’s in a standard tool kit:
Large, adjustable open-end wrench—open-ended wrench that you can adjust the head of to fit different size bolts
Machinist’s hammer—hammer with a metal head, has a peening end and a small headed metal hammer end, used on metal
Cold chisel—used for cutting metal
Taper punch—tapers down to a narrow point, blunt on other side
Pair of tire irons—used to remove tires, like a screw driver that allows you to pull tire out of rim, using leverage without damaging tire itself (or innertube)
Tire-patching kit—to patch breaches in tire
Bicycle pump—inflate tires
Can of molybdenum-disulfide spray for chain—WD40, like yield, penetrating ability into inside of each roller to make sure that they roll correctly
Impact driver—generates a twist to break stuck bolts, hit with a machinist’s hammer, we used it on the bottom end
Point file—file for the points, keeps them clean and flat
Feeler gauge—tool with shims measured at 1000s of an inch allowing you to set a gap
Test lamp—way to test continuity of electricity
Spare parts:
Spark Plugs– (repeated from earlier) a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark
Throttle, clutch and brake cables—three types of cables (front break, throttle that goes to carburetor, and clutch cable)
Points, fuses, headlight and taillight bulbs
Chain-coupling link with keeper—master link, each chain had removable part (u shaped, have to take it off allows connection and disconnection of a chain without need for chain tool
Cotter pins—metal pin used to stop axel from sliding out, goes through shaft or hole and bend afterward to keep it in place, keeps parts from slipping
Baling wire—extra wire for miscellaneous purposes
Spare chain
Storyline
Set off again, very early, very cold
Taking pictures, saving memories—he doesn’t want to take pictures, you would need a 360 lens to really take it in, just wants to live in the moment instead of trying to keep it
Loving something is often a function of spending more time with it (like his gloves)
Reading Assignment:
Read this article: http://www.princeton.edu/ssp/64-tiger-cub-1/64-data/Tiger-Cub-Engine-Calculations-revised.pdf
Read chapter 2 of SCAS