Does anybody know how to make a bicycle dynamo using easily accessible parts?
922758
you could probably make one if u wanted to but it would not be anywhere close to the dynamo that you buy from raleigh
51103
Try this component shop:\n\nhttp://proswing.com/
568254
1. Build a really big sail\n2. Magnets (think of the magnetic trains that Japan uses, however the whole roadway would have to be made with magnets to pull this off)\n3. Using Pascal's principal of compressed liquids you can probably make a peddle system (Brakes and most powered steering systems use Pascal's principal, source 1)
316711
Yes manufacture bicycle
660694
Here's one way.  I built something like this when I was 11.\n\nI dont need to say the obvious about not cutting off your fingers, poking your eyes out, or gluing your hands to the table do I?\n\nie I'm assuming you're capable of doing the below safely.\n\nyou need:\n\n2 big wheels\n1 smaller wheel (you can always make wheels from cardboard and balsa)\nThe biggest propeller thats fits.\nelectric motor\nlantern battery (big square thing with springs on the top)\nSome 1/8" thick balsa sheet.\nsome dowel which fits in the wheel.\nwire\nA wide necked plastic drinks bottle - Sunny D maybe?\nsticky tape \nhot melt glue \nlong drawing pins/nails\n2 x 10-20 ml syringes and a length of narrow bore plastic tube.  (doctors surgery might give you two syringes if you ask nicely an the tube is used on fish tanks)\n\n\nThe plastic drinks bottle is going to be the chassis for your car.\n\nyou need to cut the following holes in it\n\n- small hole in the lid \n\n- Big hole in the side just smaller than the tennis ball\n\n- Small hole for the wires from the motor\n\n- small rectangle opposite the big hole, near the bottom of  the bottle, same width and length as the small wheel.\n\n- 2 small holes the same diameter as the dowel further up\n\n\nHot melt the motor to the inside of the lid with the shaft sticking through the hole.\n\nSecure the propellor to the front of it. \n\ncut two long lengths of wire.  Strip the ends and twist one wire around each of the terminals on the motor.\n\nFit the cap, motor & propellor wires.  push the motor wires though the bottle.\n\nPut a short length of dowel through the small wheel and then hot melt it inside the plastic bottle so the wheel sticks down through the hole you made.\n\nStick a long piece of Dowel through the two small holes at the front.  And pin the wheels on the axles.  All the Wheels rotate freely.\n\nHot melt  another piece of dowel to the bottom of the bottle so that it sticks up vertically.\n\nMake a rudder out of the 1/8" balsa. say 6" high and 3" deep.  Near the bottom stick a 1/2" long piece of dowel so that pokes out at 90°.\n\nTape the balsa to the vertical dowel along one side only so that it will hinge.\n\nHot melt a syringe to the top of the bottle so that the plunger is facing the rudder.  Attach a piece of dowel to the syringe plunger and then to the short bit of dowel sticking out of the rudder.  the rudder end needs to be able to move  ie pinned together.\n\nConnect the syringe to the plastic tube.\n\nWrap the wire from the motor and the tube together with tape to make an umbilical cord. \n\nconnect the other end of the tube to the syringe\n\nConnecting the battery up will give you forwards and reverse and pushing the syringe in and out will give you steering.\n\nThe tennis ball will just sit in the hole on top.
226639
Go to a bicycle shop (schwinn for example) and look at the tandems. Anyone skilled enough to build one, will be able to draw some plans. You could think outside the box and design a side by side tandem, two bikes with a drag link  to the front forks and frame connectors.
221158
A good site is Weight Weenies.  Shows the weight of many bicycle parts.
4393
There are no easy ways, they are all very equipment intensive, and expensive. Probably a web search on your favorite search engine will turn up a company that will do it.
24463
Its easy to make one yourself.\n\nhttp://www.graphic.org/venbas.html
438682
sure. go to a science store or look up schematics on the web.
390837
Check this site out.\n\nhttp://www.usoe.k12.ut.us/curr/science/sciber00/8th/machines/sciber/lever3.htm
246384
Windmill making is very easy. \n\nTake a small fan like structure. The fan should be connected to a vertical poll. The fan spin should be connected to a cycle dynamo. This can be done using a hard rubber band. (Something similar to the rice mill). The dynamo inturn can connect to a light. \n\nBut if you have a prejudice that a small windmill can produce enough electricity to light up your house, it is wrong. Windpower is one of the less efficient power sources. \nWindpower < Hydro electric power < Coal power < Diesel power < Nuclear power.
954062
put an arm perpindicular on the shaft, put another arm pinned to the first, and slide the second through a sleeve.\n\njust like an old fasioned steam engine turned linear movement (piston) into rotary(drive wheel
436280
attach a metal brack from the underside of the ski up to the outer portion of the axle of the bicycle
484520
Build a ramp and go really, really fast.  Use Pedro's bike it has pegs!
669132
if u know how to build a cricuit i can explain you .!!!!\n\nbut if u dont know how to make a circuit... u r in wrong way ... u probably need to learn circuit making... or better yu buy a remote from a shop ;-)
229901
Finding the individual cog may prove to be tough. You can, however, buy a complete freewheel with a 34 tooth cog on it from Harris Cyclery.\n\nhttp://www.sheldonbrown.com/harris/freewheels.html#7