Why does a small engine flywheel have different sized fins?
83508
If you have ever noticed tread patterns on tires, there will be seemingly random variations in the pitch and withdth of tire sections.  This is to reduce the harmonics of the tire tread on the road and disturb resonant frequencies for a quieter tire.  \n\nPlacing different sized fins on say a lawnmower engine flywheel creates the same effect in the air: it prevents whiny resonances across the RPM range to make a quieter engine and disturb the resonances that would exist otherwise.  \n\nAnother reason there may be different fins is due to the magneto magnet cast into the flywheel.  Some flywheels are composites with a cast aluminum section or a special magnetic section which is attached to the flywheel later on.  The attachments force them to change the fin design in the area of the rivets, or screw castings, or whatever feature they have chosen to mount to the wheel.  Then they must grind a flat opposite the embedded accessory for balancing purposes, which may also include the grinding off of fins in that area as well, causing it too look asymmetrical.  \n\nIf you look at replacement mechanical fan blades for older vehilces you will notice that the fins are not equally spaced.  You might have 3 close together, a wide gap on either side, and then 2 fins directly opposite the three.  This is to control the vibration of the fan and disturb all the resonances to keep the fan safe and keep it from coming apart at certain RPM.  It also makes a quieter fan. \n\nResonances develop in a mass-spring system, which define many rotating assemblies.  If you know the mass of the system and the spring constant, you can calculate the resonant frequency.  This is the point where the driving frequency matches and reinforces the frequency of the mass-spring system, and they continue to amplify the load until the device explodes.  Complex systems have nodes of resonant frequencies, which vary in intensity and value along a frequency band.  \n\nAs an experiment, you can get in your bathtub and close the sliding glass door.  Sing a single note and vary the pitch of that note.  You will notice that some notes become very loud, even though you are not putting more effort into making the sound.  The bathroom walls are forming a cavity of a certain length, and when you hit an even harmonic, the cavity will reinforce the waves and make the sound louder.  This increase in volume is the same increase in energy mass-spring systems encounter when driven at the resonant frequency.\n\nUsually engineers try to make the worst resonant frequency much higher than the assembly will ever see in its use.  For instance, the resonant frequency of an engine may be 10,000 RPM.  They will limit it to 7,000 with a governor to prevent the engine from exploding.
134486
a 383 is a stroked 350....a stroked engine makes alot more torque there for needing to change gears less you can pretty much run the same gear around the whole track
1136402
The power transmission system in a bi-cycle is of chain type. The mechanism is as follows. The larger driving sprocket is driven by the motion of pedals. The roller-bush type chain connecting the driving sprocket and the smaller driven sprocket transmits power from pedal to the rear wheel. Due to the smaller size of the driven sprocket, the speed multiplication occurs ( the speed of rotation of rear wheel is larger than speed of rotating the paddle).\n\n[You may also note: A chain, like a power transmission belt, has a taut and a slack side. In usual conditions i.e. while going forward, the slack side is at the bottom and taut side at the top. If the direction of rotation of pedal is reversed, the top side of the chain becomes slack and bottom side is taut.]\n\nLet us come to the specific topic now.  While doing reverse paddle, the chain tends to drive the driven sprocket in opposite direction. The smaller sprocket is provided with "ratchet-shaped" teeth. So the chain and driven sprocket doesn't mesh but slips. Thus preventing any power transmission to the rear wheel. Thus there is no motion of rear wheel and hence the cycle cannot be driven backwards.\n\nLearn about ratchet from
165358
It would have to have some form of energy to get it moving, just like any electric motor.  From there a flywheel could keep it going but you would have to continue to add power to keep it from spinning down.  So what you end up with is a regular electric motor.
739663
It is normally the additional pressure you get from the turbo. It is dynamic because it changes with turbine rotational speed.
440213
That is because the fly IS moving at the speed at which the vehicle is moving. By the way, it DOES NOT hover at the same place. Suppose the fly is a little fast than the car , then it appears to the fly that the wind-shield is moving towards it and it then adjusts it's speed to remain in the same place( if it chooses to). In the same way in all other cases, it modifies it's speed.\n Someone above pointed to inertia. Remember inertia only acts if the fly or any other object is in contact with the moving object. Otherwise it does'nt come into picture.
39411
Crank shaft with a bigger throw and shorter conecting rods.
1155291
For a given horsepower, a 2 stroke engine would be smaller than a 4 stroke engine.
1082270
nearly all motorcycles have front and rear disc brakes but normally the rear brake is a smaller single disc as opposed to a larger twin disc set up at the front. This is because the weight of the bike mainly transfers to the front under braking hence the need for powerfull brakes up front....the rear gets lighter so only minimal amount of braking power is needed so as not to lock up the rear wheel.
245006
I'm not positive on this but I believe to what your refering to is the degree of seperation from when exhaust valve closes to when intake opens.\nBig blocks and performance cams tend to have a longer seperation to deal with higher RPM's with out valve overlap which would decrease top end.
777778
since with no motor it stopped the only possible answer is 100%\n\nthe motor had to accelerate the mass so FOR A TIME less than 100% but once the mass was in motion the only power requirement was that required to overcome drag ( friction )\n\nthe interesting part is that if you remove the cylinder and run the motor only the same answer still applies\n\nif you want a different answer then you can rephrase the question - what amount of 'power' did the motor impart to the flywheel or what amount of 'power' was used to accelerate the flywheel ( the power will always be 100% used so you need the kilowatts or horsepower or some other measurement for a useful answer )
285712
I have made and ridden motorcycles for 20yrs and the biggest factors with tyre sizes are stabilty from centrifugal force. Bikes with small wheels are unstable at higher speeds, they are inherently closer to destruction because at the same speed a smaller tyre is revolving faster. Tyres are critical on bikes. As a bike leans in to a corner, the tyre, because of it's shape or profile, increases in contact surface to counteract the amount of force pushing the bike to the outside of the corner. These forces get to a certain point before the bike will slide and crash. Things that affect the performance of this are, heat in the tyre, weight vs power vs tyre size, tyre profile, diameter, motorcycle geometry.\nBasically you do not change wheels or tyre shapes on a bike unless u are prepared for the consequences. Harleys may put really big tyres on but they are not performance orientated. \nAlmost all bikes these days have a 120/70 17inch front and depending on power a 160-200/55 17inch rear. Most bikes pre-1988 ran 18inch(or bigger) tyres. The simple reason for this is stability vs steerablity. 17inch is the best compromise. If you are designing a bike, stick with these sizes and work on suspension, geometry and weight distribution as they are more changeable. cheers Neil
219195
CAUSE IT HAS THE ANTILOCK BREAK SYSTEM WHEN ON AN OLDER MODEL THEY HAVE A COUPLE OF BOLTS AN A LITTLE ROD!!\nI WISH YA THE BEST OF LUCK!!! I KNOW IT CAN BE A ***** WORKING ON THE NEWER MODELS!!
1039020
Here is something for you it also pertains to your other question. Don't agree but it is more info for you.You may want to go to your local fly shop. They should be able to help you with your new rods.\nhttp://www.mindspring.com/~filker/Pages/Fly_Line_Size.html\nhttp://globalflyfisher.com/fishbetter/flylines/
462765
they are a componet club. that means more than likely some guy in a garage or shop made them. and its a crap shoot where they will all have the same specs and tolerances.
197291
to get the offset on the crown wheel inside the diff to turn.Thus causing the axle shaft to spin.
904139
Smaller cog on the engine, larger on wheel or Axel.\nThat combination will give you more top end but a \nslower bottom end, meaning that it will take more\ntime to get to top speed. A larger cog on engine and\na smaller cog on wheel or axel will give you a higher \nbottom end but you won't get a faster top end.