CHAIN 520

[d.k]

1.help me with the horsepower rating table for this chain showing rpm of smaller sprocket and no of teeth of smaller sprocket
2. the dhp and rpm of smaller sprocket does not show up the reaaings for larger values of small sprocket rpm for calculating chain no please help me with this.

[MCoach]

1. Help me by showing your research into the subject
2. Have you ever been so far even as decided to use go want to look more like?

[d.k]

i am asking for chain 520

[PatClarke]

Deepak, 520 chain should be available from any motorcycle parts shop.

Pat

[d.k]

i am asking the horsepower ratings of the chain #520
and i know its easily available http://fsae.com/groupee_common/emoticons/icon_smile.gif

[acedeuce802]

If it is easily available, why haven't you found the answer yet? Google is your friend, or should be. Google is a good friend of mine, and helped me find the answer to your question. Google also asked me not to share the answer, so you can learn to use Google to your advantage.

[jd74914]

Maybe this will help you get started...

Chain is rated for a tensile load. You need to calculate your theoretical tensile load using an assumed engine torque or power/speed and sprocket size. Once you do this, you can decide how strong a chain you need.

Few manufacturers likely have power vs. chain size charts because they would be specific to a single application.

[Shebert]

Originally posted by DEEPAK KUMAR:
i am asking the horsepower ratings of the chain #520
and i know its easily available http://fsae.com/groupee_common/emoticons/icon_smile.gif

What is the most powerful bike that use 520 chain?

[MCoach]

Honestly,

520 chain is the most commonly used chain on these cars and it's not like we're on the limit either. DSR cars (look them up if you don't know what they are) also run 520 chain.
I don't see a problem here. Focus on components that have a larger chance of breaking.

[Frank]

But I’ve never tried to push the limits of a chain… I did not think it wise.


But, I’ve considered the limits of other drive train components quite a lot.

Please consider a few unusual, but possible, load cases.

Some of these might not be obvious initially.

Case 1: A "burn out". Force in chain is a function of weight of car, friction coefficient available at the rear tyres, weight split of car F:R, tyre diameter, and rear sprocket diameter.

Case 2: Lowest gear selected, engine producing maximum torque, IDIOT driver applies the brake HARD. Force in chain is function of engine maximum torque, gearbox ratio, engine sprocket diameter.

Case 3: Lowest gear selected, engine clutched, idiot driver applies the brake HARD, then applies maximum throttle and “drops the clutch”. Force in chain is function of engine maximum torque, gearbox ratio, engine sprocket diameter, engine inertia, and characteristics of the clutch.

I have not collected data, but I have worked with the assumption that typical bike clutch is designed with 30% margin. Ie Case 3 = 1.3 x Case 2

I suspect there are a large number of FSAE cars using dive shafts that won’t cope with Case 2 for very long.

I suspect there are quite a few FSAE cars using dive shafts that won’t cope with Case 1 all day long, especially on a hot day.

You can prevent Case 2 and 3 happening with electronics. I would suggest a brake line pressure sender is better choice than a brake pedal micro switch.

Case 4: "Drop the cluth" and proceed to a "Burn out" This happens very often. I have no idea what load the chain experiences, nor over what time frame. My guess is that it could be as high as Case 3, for up to 0.2 seconds. THIS IS A GUESS.

[Frank]

http://www.mpta.org/Power%20Ratings%20122001R1.pdf

http://www.martinsprocket.com/...EERING/E186-E192.pdf (http://www.martinsprocket.com/ENGINEERING/E186-E192.pdf)


5/8" pitch #50 chain



My FSAE car makes 70HP at 10,000 RPM

engine-gearbox reduction = 1.863
Low Gear = 2.928
High Gear = 1.086

Total Low Gear = 2.928 x 1.863 = 5.455
Total High Gear = 1.08 x 1.863 = 2.023


In Low Gear

10,000 rpm / 5.455 = Engine Sprocket speed is 1,833 rpm

13 tooth Sprocket Used

Chain Rating = 7HP



In Top Gear

10,000 rpm / 2.023 = Engine Sprocket speed is 4,942 rpm

13 tooth Sprocket Used

Chain Rating = 1.6HP



Tensile strenght of "Brand X" 520 chain is approximately 38,000N

70HP = 52.5 kW = 52,500 W

1833rpm x 13 teeth x 0.625 inches = 6.3 m/s

Force = Power / Velocity = 52,500 W / 6.3 m/s = 8,327 N

Case 3 allow extra 30% = 8,327 N x 1.3 = 10,825 N

I think you would experience the onset of plastic deformation (gross chain stretch) at around 20,000N