Parker Wild
Last time in the lab:
– Electrical team: laid out the wiring harness, checked with circuit diagram to make sure everything was where it should be; stator wires had breaks in them, suggesting they need to be replaced; insulation too thick to fit through engine case; labeled connections on the wiring harness; may have to lengthen some wires for the brake light
– Top end: completely reassembled the head on the ‘62
– Fasteners, Gaskets, and Carburetor: assembled entire oil system; fasteners gathered to attach oil reservoir to the frame; need to acquire gaskets and seals for carburetor and oil system; check to see if the seals are clean and undamaged; dry sump oil system has a vacuum pump with a filter (screened)
– Wheels: trued wheel; put the tire on the rear wheel; have to put brake assembly on and attach to frame
– Forks: forks inserted into triple tree; tightened the axel; tubes had slide through holders on the triple tree, but they were sticking, so Glen developed a tool that threaded into the fork tube and connected to a slide hammer (steel handle attached to a pole with a weight attached – inertia from when the weight hits the stop can pull the tubes through); handlebars and speedometer can now be mounted on the bike
– Bottom end: inventory of parts left over in the bin; still need to connect oil system to the bottom end
– Transmission, Clutch: adjusted clutch lever, listened for the timing side cover for the proper spacing and then turned the screw half a turn back when heard a tick; screw for plate adjustment damaged, so they re-cut a slot; chain is now on the clutch (brand new)
– Frame: looking for parts that have been powered-coated, plan on assembling foot pegs; important to not screw a nut on a stud with the wrong threads (ended up having to grind off the nut and grind down the end of the stud); clean out threads before trying to put anything together, make sure the hardware fits before torquing
– Prof. Littman – picked up rims from the chromer
Demonstration:
– Energy Transfer Systems:
– A diode is a one-way valve for electricity, so two diodes (of opposing directionality) hooked up to two bulbs in parallel with each other is a good way to determine direction of current flow
– Coil of wire and a magnet that slides between it, connected to the diode-light assembly
– Lights alternate bulbs (out of phase) because inductance occurs first in the positive direction as the magnet enters the coil, and then the negative direction as the magnet leaves the coil
– Capacitors store energy in an electric field:
– C = eA/d, where e is permittivity of free space (epsilon naught)
– Energy stored in capacitor: E = 1/2 CV^2
– Charging a capacitor (with Q) creates an electric field between plates
– When connected to battery, capacitor charges; discharging capacitor to lamp, which lights momentarily and dims very quickly
– Inductors:
– When you run current through an inductor, it generates a magnetic field
– Energy stored in an inductor: E = 1/2 LI^2
– Back-EMF generated when you break the circuit with an inductor (which has a magnet through it)
– Self-inductance: basis of energy transfer system
– When points are closed, current flows through
– At just the right time, roughly when voltage is at a peak in one direction, open the points, and the energy stored in the magnetic field is transferred to the capacitor with a very high voltage; there is a transformer to step up the voltage for the spark plug