Wednesday February 4th Lecture Notes Aynslie
- Chapter 4,5,6
Update
- Engine has been dropped – Removing 3 bolts was crucial
- The motorcycle wheels have been measured and new wheels have been ordered – purchased 3 rims
- Wheel team also employed the dial caliper
- Wheel time also undid the screws and kept records
- The engine has been partially taken apart
- The Three Tree is being taken apart
- The front wheel is also being removed
- The fasteners have been sorted – will need drill new holes because some of the previous threads have been completely stripped due to the incorrect use of different types of fasteners
Book Analysis
- Chapter 4 (approximately 15 min per chapter)
- Technical Material Included in the Chapter
- Machinist hammer is not a mallet
- Cold chisel = solid piece of metal
- Tire Irons – needs three to properly remove the wheel
- WD40
- Impact driver – tool select which direction Right or Left and then hit the impact driver with a hammer – can often rotate a fastener around 10 degrees – set for left if want to loosen a fastener
- Point File – hardened steel needs to be hardened for filing down the points (which can be made of Tungsten)
- Narrator uses a checklist for tools
- Also, carries Walden – interesting choice includes romantic anti-technology ideals
- Narrator emphasizes the value of practical skills and understanding the technology not just following technology.
- See the difference in classical vs romantic debate (Phaedrus = romantic Narrator = classical)
- The shop manual and troubleshooting guide can be found on Canvas
- John and Siliva are riding a BMW – very reliable and very expensive
- BMW is horizontally opposed, decreased the sound and vibrations from the engine
- Chapter 5
- Technical References First
- Shims = mentioned – solution quite clever –
- We have phosphorous bronze for our shims
- Handle bars need to be tightened – solution use the shims so then when attach – attach around the whole handle bar. Shim increases diameter
- Box ends = wrenches that are open with 6 or 12 point – cages the nut
- Analysis
- Beer can as a shim story – see the difference in values (big focus of the book + philosophy: what is valued, how do we value something)
- In the narrator’s mind beer can solution = good because practical
- John’s mind cannot tarnish his BMW with beer can, but also genuinely doesn’t know and understand why a beer can is a smart fix
- Son does not receive treatment for his mental illness – narrator’s solution to mental illness = going on adventure
- Chapter 6
- Technical Information
- Cotter pin = pin that locks a washer and goes through ad secures the washer to an even further extent – person pulls the ends out to prevent from moving even further
- Analysis of Book
- Narrator recognizes Phaedrus can go too far + over load and become too analytical
- Suffers from dual personalities – only through electro shock did the Narrator come back into existence
- Phaedrus often thinks on a really high conceptual level, but less practical – unlike the narrator.
Monday February 2nd Lecture Notes Aynslie
Book Discussion Covering Chapter 2 + 3
Chapter 2
- Technical parts of a motorcycle mentioned: seizure (excessive heat causes piston to get hot because the barrel cannot expand)
- Spark plugs, points, kick starter, carburetor (made up of two pieces that float =- later on switch to mono block – 1 part)
- Points – 2 pieces of mental (tungsten, material depends) that push together + separate. You can adjust the timing of the ignition through the points. When the points open = spark, so can rotate the points and alter time of ignition – need timing to be just right
- Tappets – hardened steel on the cam
- Push rod – composed of alloy one goes up and one goes down – 1 push rod opens the intake + 1 push exhaust valve – dependent on the two movements occurring
- Tappet adjustment = how much play in the motorcycle that you want – always aim for a little bit of give due to thermal expansion, use a gauge of 1/1000 in- if incorrectly done the noise can be heard sounds like knocking. There is a happy medium.
- If the wrong type of fasteners is put on (Whitworth, Imperial, Metric, etc.) can dig into the threads and prevent disassembly.
- Details make a big difference, must take time
- Classic motorcycle problem (one we will likely run into) is the float gets stuck which causes all the gas to go on the ground.
- Chisel – flat head
- Cold chisel = solid piece of metal – hit with a hammer – nothing absorbs the impact – misuse it can have major consequences.
- Cooling fins – air flows over and cools (air cooled)
- Also, our engine is naturally aspirated
- Motorcycles = air cooled 25%-30% efficient, 1/3 energy lost heat 1/3 heats up engine
- Large motorcycles are water cooled
- More power = more heat = more fins + surface area due to the greater power. More explosions per time = more power = more heat
- What Need to Learn
- Need to solve own problems
- Pay close attention – can’t miss things
- Need to make sure motorcycle fasteners are correct
- Use lock washers on our motorcycle
- A lot of simple things are causes of far bigger problem
- Chapter 2 Technical Continued
- Overheard valve– intake air overhead – leads to higher compression ratio – leads to increased efficacy
- Diesel engine = more efficient 40%
- Higher compression increases efficiency which leads to detonation – raises temperature and causes knocking
- Overhead cam – our motorcycle not have – we have overhead valve (O.H.V)
Chapter 3
- Speedometer – cable from rear to handle bars faster = more turns
- Magnet pulls the needle to show the speed
- Tachometer = RPMS’s measures speed
- Our motorcycle’s top speed = 6000 RPM
Book Analysis (Chapter 2 + 3)
- Narrator changes his opinion on ghosts to explain scientific ghosts, how the world has changed through science
- Does gravity exist? Is the theory correct? Use particles as example? Is light a wave and a particle?
- Gravity, light, etc. all theory – not entirely known – if it really exists because a physical object doesn’t move
- Eistein liked that the objects affected each other, without people knowledge does not have an impact
Groups
- Handlebars, Fork, Wheel
- Alex
- Vanessa
- Chloe
- Abby
- Top + Bottom End
- Nate, David, Ben, Eugene
- Clutch, Oil, and Fasteners
- Zane
- Aynslie
- Halla
- Emily
- Electrical
- Diana
- Connor
- Rashmiya
- Amy
Monday 01/26 Notes:
Books:
- Zen and the Art of Motorcycle Maintenance
- Shop Class of Soulcraft: An Inquiry Into Values- Books can be purchased on Perusall through Canvas or on Amazon Kindle.
Reference Materials: tigercubandterrier.com
Lab Objective: Disassemble the motorcycle and restore it.
Week 1 Reading: Preface, Introduction, and Chapter 1 (Zen and…)
On Wednesday (01/28), we will discuss the introduction.
Lab Safety Due By Wednesday
For following weeks, we will read 5 chapters/week. We will read 2-3 chapters for Monday and the remaining 2-3 on Wednesday. Make note of motorcycle references. The chapters will be discussed in precept. Each discussion will have a discussion leader.
Daily Structure:
1 hour of discussion
Move to the lab where we will split into groups.
Each group of 4 will be responsible for 2 aspects of the motorcycle.
Groups will be decided on Wednesday
There will be a final powerpoint presentation during reading period in which each person explains some aspect of the motorcycle restoration in detail, highlighting the technical elements.
Class Expectations:
No Phones
Wear Safety Goggles
Discussion: What do we want to learn? Ex. How to use tools.
- How to identify, troubleshoot, and resolve mechanical issues
- The science of an engine (combustion, pistons, etc.)
- How to theoretical concepts apply to our physical work (specifically ECE)
- How the transmission works
Wednesday 01/28 Notes:
Groups:
Top End:
- Top end of the motor, also known as the head of the motor
- Includes the cylinder head, valves, valve seats, rockers, springs, barrel, and the piston
- Barrel = the cylinder that the piston moves in
- Includes the cylinder head, valves, valve seats, rockers, springs, barrel, and the piston
Bottom End:
- Bottom end of the motor
- Includes the transmission, fly wheel, push rods, and the cam
Our motor cycle has a 4-stroke engine: Intake, compression, power, exhaust. It is a deflagration engine.
Electrical:
- Mainly concerned with the sparking system and the head/tail lights
- Includes the spark plugs, battery, rotor, stator, rectifier, and the points
Clutch + Oil:
- The clutch allows you to disconnect the running engine from the wheels
- Our motorcycle has a wet clutch, meaning it is bathed in fluid
- Our motorcycle is a kick-start
- Includes the plates, primary chain, oil reservoirs, and the oil pump
Fasteners
- Whitworth hardware
- Today’s standard is Imperial (SAE) bolts/threads, but there are also metric.
- Whitworth is English Imperial
- Currently, the wrong hardware has been put on our motorcycle, so the threads may be chewed up
- Job of this group is to repair the threads
- Use inserts: drill a bigger hole, thread it, and put in an insert
- Use thread gauges
- This group will also be responsible for the fenders, or “mud guards”
Frame
- Tubular frames that have been welded together
- Includes the triple tree, spring shocks, swing arm, and the plunger
Wheels
- Spoked wheels with 40 spokes/wheel
- Rims are currently a mess, so we are going to rebuild the front and rear wheels
- Rebuild the hubs and brake assembly
- Includes the brakes (shoes and drum), spokes, rims, and the tires
Handlebars + Forks:
- 2 levers
- Our ball bearings for the steering need to be assembled
- Includes cables, levers, and the triple tree
Reference Materials:
“Cub Body” on Canvas:
- Tiger Cub “Bible”
- Great technical resource
- History of the bike
“Cup Appendix” on Canvas:
- Serial numbers on each motorcycle + technical details
- We are a 58T20C (probably somewhere around pg. 133
- Towards the end:
- Component dimensions
- Ignition timing
- Factory gearsets for the different transmission
- A list of all engineering changes made to the motorcycle (pg. 195)
Part Manuals in Modules:
- Exploded views with part numbers
How to Lead the Discussion:
- Take control of the class:
- Pose questions
- Invite classmates to speak
- Start with any motorcycle references
- Move to chapter content
01/28 Discussion Notes:
- Introduction (led by Alex)
- Phaedrus is the narrator’s old self, Narrator is his new self
- Person vs. their nature
- Author is schizophrenic and references it in the book
- Keep an eye out for mythology references near the end of the book
- We are entering the book knowing that the narrator is flawed
- Be mindful of the first-person: Are you getting the truth
- Chapter 1 (led by Eugene)
- Motorcycle References
- The choke (pg. 13)
- controls the fuel-air mixture using the Bernoulli Effect
- When the piston goes down (increasing volume), air is pulled in. The choke stops the air, drawing raw fuel (unatomized) into the chamber
- John was wrong because he flooded the engine
- Too much fuel, got the spark plug wet
- Standard solution is to remove the plug, let it dry, and then restart the motorcycle without choking it.
- Points (pg. 14)
- Create a magnetic field that then collapses to make a spark
- Made of high temperature material
- “Burning up the points” = common, bring an extra pair on long journeys
- Cylinders (pg. 13)
- Piston and barrel are cylinders
- Cast Iron
- Molten iron that is cast
- Has little crevices that make it good for engines because they hold oil
- Plugs (pg. 14)
- Spark plug
- Diagnose the engine by looking at the color of the spark plug
- ex. If they are black, there is too much fuel and not enough air
- The choke (pg. 13)
- Content
- Starts very descriptive (nature) and moves into analyzing the minds of the couple
- Couple doesn’t like repairing technology but uses it
- Consumer of technology vs. engaging with it
- Human resentment of technology while wanting to reap the benefits
- Nature (human) vs nature (world)
- Maybe they aren’t so different
- Theme: Value + Aesthetics
- Buddha quote (pg. 18)
- Narrator places value in both nature and the man-made
- Conjecture: technology can bring as much piece as nature can
- Narrator is trying to avoid being a hypocrite
- Narrator is careful not to put down his friends
- Art vs. Science
- An assessment of what is best
- Recall the subtitle: “An Inquiry of Values”
- Motorcycle References
HOMEWORK: Read chapters 2-6.