HiroJ

Oh my god.. thanks for pointing that out! Its actually 200. i didnt notice it was so large because i have my calculations in a very messy excel sheet...thats rad/minute... not an SI unit by any stretch of the imagination. This should change a lot. Thanks!! I'll see what happens and post back here

ok, for three its simple... 0.6 seconds for jump. 0.3 seconds going upward and 0.3 seconds going down again. acceleration due to gravity is 9.81 m/s. if you multiply m/s * s you will get an answer in metres

Hi, This is my first time posting, I hope you can help. Designing a belt system. Two pulleys, two tensioners. 5 m circumference of belt. Found moment of inertia of pulleys and tensioners Found moment of inertia of belt added the two: 0.742750068 then used K.E= 1/2 * I * omega^2 to get rotational energy at full speed (1200 rad/s) K.E = 53478004.91 joules SEEMS EXCESSIVE!! want to find motor power required to run this. so i chose an acceptable start up time 60 seconds for the 187 kg belt to reach 30 m/s however this told me I'd require a 891KW motor Can anyone help me figure out where im going wrong?? p.s. mass moment of inertia for belt was calculated as belt total mass at driver radius.