Webster Engine - Bill of Materials

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1	Webster Engine - Bill of Materials and Required Tools
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3	All Academy of Lagado site content by kaje is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License unless otherwise noted. Please cite all use of items from this website as follows: From Academy of Lagado © by kaje, used under a Creative Commons Attribution-ShareAlike license: http://creativecommons.org/licenses/by-sa/3.0/
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5	This bill of materials is based on the engine and plans in the link below. Sheet references are to the plans linked to below. This list is believed to be complete, but is not gauranteed to be free of errors. Required screws and springs have been color-flagged for easy reference.
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7	Site for original Webster engine:			http://home.comcast.net/~webster_engines/
8	Link to plans (PDF format):			http://home.comcast.net/~webster_engines/Plans.zip
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10	No.	Sheet	Description	Material	Qty	Size (inches)	Comment

11	1	2	Base plate	Aluminum alloy	1	4.938 x 8.125 x .375 (3/8")
12	2	3	Side frame	Aluminum alloy	1	2.5 x 5.625 x .313 (5/16")
13	3	3	Crankshaft support	Aluminum alloy	1	2.125 x 2.5 x .313 (5/16")
14	4	3	Screws		4	6-32 x 3/4, flathead
15	5	4	Cylinder	Cast iron or 12L14 Steel	1	1.5 diam. x 2.5 L
16	6	4	Cylinder head frame	Aluminum alloy	1	2.75 x 1.5 x .75
17	7	4	Screws		4	4-40 x 1, flathead	For cylinder head
18	8	4	Screws		2	6-32 x 5/8, flathead	To attach frame
19	9	4	Screws		4	4-40 x .9, flathead	To attach valve block
20	10	5	Flywheel	Cast iron or CRS	1	3.750 diam. x 1.125	Can use any heavy metal (e.g. dumb-bell)
21	11	5	Crankshaft - shaft	CRS	1	0.5 diam. x 3.5	Make crankshaft in 3 pieces and silver solder
22	12	5	Crankshaft - crank	CRS	1	1.25 x .5 x .219	Larger if balanced
23	13	5	Crankshaft - pin	CRS	1	.281 diam. x ~.6
24	14	5	Crankshaft spacer	CRS	1	.5 diam. x ~.218
25	15	5	Main bearing	bearing bronze	2	.563 diam. x ~.4
26	16	6	Piston	6061-T6 aluminum	1	.873 diam. x 1
27	17	6	Oil tube	brass	1	.094 diam. x .188
28	18	7	Connecting rod	6061-T6 aluminum	1	~3.6 x .563 x .313
29	19	7	Wrist pin	drill rod	1
30	20	7	Wrist pin bushing	bearing bronze	1	.250 diam. x .313
31	21	7	Con rod bushing	bearing bronze	1	.375 diam. x .313
32	22	8	Rocker arm	CRS (optional case harden)	1	4.329 x .219 x .313
33	23	8	Rocker arm spring	spring steel	1	~3.1 x .281 x .010
34	24	8	Rocker arm washer	brass	1	.250 diam. x .015
35	25	8	Rocker arm spacer	CRS	1	.250 diam. x ~.105
36	26	8	Screw, Tappet	#4-40 SS screw	1	4-40 x 3/8", hex head	Tap bolt with hex head
37	27	8	Cam shaft	drill rod	1	.250 diam. x .938
38	28	8	Exhaust cam	CRS (case harden)	1	.712 diam. x .185
39	29	9	Spur Gear - Berg P32S28-24	SS	1		32 Diametral Pitch; 20 Pressure Angle; 24 Teeth; 3/4" Pitch Diameter; 3/16" Face Width; 1/4" Nominal; 303 Stainless Steel (~$30)
40	30	9	Spur Gear - Berg P32S28-48	SS	1		32 Diametral Pitch; 20 Pressure Angle; 48 Teeth; 1-1/2" Pitch Diameter; 3/16" Face Width; 1/4" Nominal; 303 Stainless Steel (~$38)
41	31	9	Cam gear washer	CRS	2	.5 diam. x .063
42	32	9	Ignition cam	CRS	1	.688 (11/16) diam. x .375
43	33	10	Valve block	Aluminum alloy	1	1 x .625 x .25
44	34	10	Intake valve block	Aluminum alloy	1	1 x .625 x .25
45	35	10	Exhaust valve block	Aluminum alloy	1	1 x .625 x .25
46	36	11	Valve guide	Bronze/brass	2	.375 diam. x .625
47	37	11	Spring, intake valve	music wire	1	0.013
48	38	11	Spring, exhaust valve	music wire	1	0.022
49	39	11	Valve	drill rod	2	.250 diam. x 1
50	40	11	Valve retainer	steel	2	.250 diam. x .094
51	41	11	Retainer pin	drill rod, music wire, etc.	2	~.040 diam. x .25
52	42	11	Screws		4	2-56 x .75, flathead	For valve block assembly
53	43	12	Venturi	brass	1	.375 (3/8) diam. x ~1.2
54	44	12	N.V. Block	brass	1	.188 (3/16) diam. x .375
55	45	12	N.V. Seat	brass	1	.188 diam. x .532
56	46	12	Needle valve knob	brass	1	.250 diam. x .188
57	47	12	Screw, needle valve	2-56 x .75 screw	1	2-56 x .75 screw, socket head
58	48	12	Spring	music wire	1	0.013
59	49	13	Head gasket	copper, teflon, or auto gasket	1	1.50 diam. x 0.015	May not be needed but use to be on safe side.
60	50	13	Exhaust pipe	Aluminum, brass, or steel	1	.375 (3/8) diam x 2.250
61	51	13	Con rod keeper	brass or steel	1	0.5 diam. x 0.015
62	52	13	Crank oiler cup	brass	2	.375 diam. x ~.5
63	53	13	Crank pin grease cup body	5/16" hex brass	1	5/16" hex x ~.5
64	54	13	Crank pin grease cup cap	brass	1	.375 (3/8) x .325
65	55	14	Cylinder oiler body	brass or aluminum	1	.750 diam. x ~1.2
66	56	14	Screw, cylinder oiler valve		1	4-40 x 1.125, socket head
67	57	14	Cylinder oiler spring	music wire	1	0.020
68	58	14	RC carb adapter	brass or aluminum	1		Needed if using a carburetor instead of venturi
69	59	21	shoulder screw	1/8" x 3/8"			#4-40 Commercial, 0.124" Shoulder Dia., 0.375" Shoulder LG., 303 Stainless Steel
70	60	21	piston rings	grey iron, fine grained cast iron	2	3/32" X .875"	optionally, use an o-ring Purchase from Otto Gas Engine Works: http://www.pistonrings.net/rangcast.htm
71	61	21	roll pin	0.093 x 5/8"	2
72	62	21	cotter pin	1/16" x 1/2"	1
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74	Other Items:
75			Carburetor (optional)	Carb from O.S. max .12 CZ radio control car engine with bore of .166" and RPM range of 1,000 - 5,000.
76			NGK CM-6 spark plug
77			12 V car coil
78			12 V car battery
79			fuel tank and connecting line
80			fuel				camping lantern fuel, methanol, gas/oil
81			ignition points
82			ignition condenser
83			spark plug wire
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85	Tools needed:
86		11	.094 ream (3/32")
87		8	.125 ream (1/8")
88		6,7	.188 ream (3/16")
89		3	.250 ream
90		7	.281 ream (9/32")
91		5,9	.313 ream (5/16")
92		8	.375 ream (3/8")
93		3	.500 ream
94		10,12	#2-56 tap
95		3,4,6,8,14	#4-40 tap
96		3,4	#6-32 tap
97		3,5	#8-32
98		4	#10-32 tap
99		4	tap 10mm x 1mm for NGK CM6 spark plug
100		10	.375 (3/8") counterbore
101		11	#60 drill				Needed to drill hole in valve rod - easy to break, consider getting a spare
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