* A snowmachine clutch actually consists of two separate clutches connected together by a rubber belt.
o The primary clutch is connected to the engine's crankshaft
o The secondary clutch is mounted on the end of the jackshaft (which connects to the drive shaft via a chain and gears).
* The primary purpose of the clutch is to smoothly transmit power from the engine to the jackshaft and to remove the connection when the engine is idling so that the machine is not always rolling.
* This type of system is also referred to as a continuously variable transmission. It is called this because as the engine speed increases the final drive ratio increases. That is, the difference between the engine speed and track speed decreases. It is equivalent to an automatic transmission on a car with an infinite number of gears that you never felt shift. Let's take a look at how this "infinite gearing" process works:
1. At idle the primary clutch just spins and does not "grab" onto the belt. As engine RPM (revolutions per minute) increases to engagement speed (the RPM where the snowmachine starts moving), the primary clutch begins to pull together and start squeezing the belt.
2. Now the belt is turning. This makes the secondary clutch turn, which causes the track to turn and the snowmachine to move forward.
3. As engine speed increases above engagement, the primary clutch squeezes together some more and pushes the belt so that it moves to a larger radius on the primary. Because the two clutches rotate about fixed points, the belt gets pulled into the secondary, spreading it farther apart and moving the belt to a smaller radius.
* Note that the primary clutch (on the left) never stops spinning, but the secondary (right) does stop spinning at idle speeds.
* In case you are curious, the engine rpm got up to about 7000 rpm and the track speed got up to about 60 mph or more during this clip. I supported the track with a stand and ran the throttle while an observer ran the camera.
Remove the 18mm bell housing bolt. There will be 4 easily accessible from the top with 3.1, 5 with 3.8. Next install the holding fixture with two hooks to support the engine while the trans is removed. This is a large frame like device that has two hooks that support the engine from above while major components have been removed from below. Raise and support the vehicle.
Another type of wax is applied to the "kicker". The kicker is the area under the bindings. In other words the kicker is the area where most of the gravitational force of the skier is applied. Skiers apply a type of wax to the kicker that will cause the friction coefficient to increase. This allows skiers to be able to push off and ski uphill.
direction. The third wheel was hooked up to the wheel frame and free to rotate
The Wankel rotary engine named after the designer, Felix Wankel, was engineered in the early 1930’s. The rotary engine was unlike the conventional four stroke internal combustion engines and lacked the need for pistons, valves and camshafts. With only three moving parts involved in the design, this engine showed great promise in reliability and efficiency. The first Wankel rotary model was shown in 1960, not as an engine, but as a pump drive. Instead of the very complicated system involved in a conventional reciprocating piston engine, the wankel engine incorporated triangular “rotors” (see figure 1) that rotate within an epitrochoidal chamber around an eccentric shaft. Not only is this engine much more simple (only 3 moving parts rather
The Physics Behind the Power of an Engine Insert the key, turn, and vroom. And down the road you go. Most people take for granted the strange conglomeration of metal and plastic under that sheet of metal, either in front or back of their vehicle. The engine, as you may have guessed, is a modern marvel- so to speak. They’re found in cars, trucks, boats, airplanes.
Furthermore, the mechanism of the machine offered a different interpretation of the working condition. At first the machine operated smoothly and flawlessly. It works according to the inventor’s words. Brian Eggert described the operation of the Machine in his review as the following:
* This expanding gas drives a set of turbine blades located aft of the combustion chamber. At least some of these turbine blades are connected by a shaft to the compressor blades to drive them. Depending on the type of engine, there may be another set of turbine blades used to drive another shaft to do other things, such as turn a propeller or generator.
„h Always place the gear shift lever in park or in gear in the case of a manual transmission.
How this marvel of engineering works is the rotor rides on an offset in the crankshaft, similar to a piston nand connecting rod assembly, and is rotated in an oval shaped case with ports for intake, exhaust and spark plugs. Incorporated into the rotor is a ring gear which had another gear that is stationary in the center, this planetary gear set is what keeps the rotor in time with the rest of the engine. The rotor creates three sealed areas where the different strokes will take place simultaneously, these three areas are sealed by strip of metal called the Apex seal which have the same function as the piston rings in a traditional internal combustion engine. The intake and ...
The exact workings of different brushless DC motors depend on the type of timing device used. This example uses a Reed switch.
is connected to a shaft, which spins a disc. The disc has holes in it
The basic trimmer works by the engine driving a multi-bearing supported hardened steel shaft housed in an aluminium tube through a centrifugal clutch this shaft is connected to a “head” that holds a nylon line that spun at high revolutions per minute (RPM). This nylon line then cuts the grass by hitting the blades of grass at high speed, this cause the grass to be severed at the point of impact. Thus trimming the grass.
To understand how this motor works, we must understand the relationship between electricity, and magnetism or simply put electromagnetism. Direct electric current in a simple description: There are two requirements for current flow. The first is a source of electrical potential energy or EMF (electro motive force,). The second is a conductor that provides a complete loop to carry the current. The reason a conductor will conduct is found on the atomic level. A conductive atom’s valance shell is not completely full electrons will flow from atom to atom because of this. When these electrons move from one atom to another that is electrical current (a brief description that is).
I mentioned on the last page that we must stop the bike by turning its kinetic energy into friction. To do this, the brakes apply a force to the disk with pads. The force of this friction is equal to the total downward force (f) that the pads put on the disk(the pads are usually on each side of the disk and crush it between them) multiplied by the coefficient of friction(u).
Fig. 6 © HowStuffWorks 2002. How Seatbelts Work [online]. Available at: http://static.ddmcdn.com/gif/seatbelt-spring.gif [Accessed 17th November 2012