Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: wangp1283
  • Order by date
  1. wangp1283

    racing tranny

    I'm trying to calculate the rotational inertia involved in a racing vehicle. Can someone give me an idea of the diameter and width of the gears (an average) in a F1 car a Rally car Thanks.
  2. wangp1283

    racing tranny

    "Also, while any weight reduction is beneficial, esp. rotating weight, the difference to the engine while accelerating in gear is just about zero." Can you explain the last part further? You mean it's only beneficial while shifting?
  3. wangp1283

    racing tranny

    It's often said that the moment of inertia of the transmission is very important to a light, racing car. So important that shaving a pound off the transmission rotating part is going to do more good than shaving a pound off the vehicle body. Can someone explain? Is it really significant? I think...
  4. wangp1283

    cost of this gear

    Does anyone know the size of a semitrailer transmission gear? (width, diameter) Do you know the approx. cost of producing such a gear? It 'll need to handle 2000 ftlb of torque Thanks in advance.
  5. wangp1283

    big rig transmission

    Does anyone know the size of a semitrailer transmission gear? (width, diameter) Do you know the cost of producing such a gear? It seems gears are pretty expensive. Thanks in advance.
  6. wangp1283

    how to produce such a response

    I can move more than 0.025. In fact, I can move as much as I can, since I only care about the acceleration. Therefore, I can give it an initial velocity to begin with. It doesn't really have much to do with the distance. Imagine a parabolic displacement curve due to a constant acceleration. If...
  7. wangp1283

    how to produce such a response

    sreid, the "bumps" on the cylindrical cam idea was what I was thinking. In fact, it doesn't have to be 0.025. I can give it a initial velocity to start with, so the lobe is a lot bigger. Also, I can do the "gear up and gear down" thing I mentioned. You said mechanical start and stops in 10 ms...
  8. wangp1283

    how to produce such a response

    by the way, it doesn't have to be too exact. 95% accuracy would be enough. Anyone want to weigh in? thanks
  9. wangp1283

    how to produce such a response

    Hi, thanks. I think I'd like to do it mechanically with the way I said above, preferably. A servo would be too complicated, expensive, and not as reliable, I would think. Also I'm not familiar with servos at all. What do you think of the way I've mentioned above? It doesn't have to be dead...
  10. wangp1283

    how to produce such a response

    Hi I need to produce such a response to a load: 1.an constant acceleration of 0.5m/s^2 for 1/100 of a second. 2.The initial velocity is not important. What matters is that during that 1/100 second time interval, the acceleration is 0.5 m/s^2 I thought about using a cam to produce this...
  11. wangp1283

    how to produce such a response

    I need to produce such a response to a load: an constant acceleration of 0.5m/s^2 for 1/100 of a second. The initial velocity is not important. What matters is that during that 1/100 second time interval, the acceleration is 0.5 m/s^2 I thought about using a cam to produce this response...
  12. wangp1283

    engine questions

    let's say there is a 200 HZ small shock loads that causes the engine rpm to make small variations (like 2 rpm) 200 times per second, does that damage the engine? or cause any bad effects?
  13. wangp1283

    engine questions

    Anyone know the mass and moment of inertia for a typical automobile engine flywheel? Does high frequency, low intensity flutuating shock load damages engine? I don't think it does, but I can be wrong. But I think an engine is already always under flutuating conditions, such as cylinder...
  14. wangp1283

    hydraulic gas accumulator

    Hi guys, I redesigned my project. The required actuator force is now only 2000 lb. Basically, I've decreased the actuation force by a factor of 10. Do you think an electric actuator can also be considered? I have a conception that electrics are not as good as hydraulics when the force is high...
  15. wangp1283

    gear speed ratio accuracy

    If I had a gear train with speed ratio of 300: 1 if an input speed into it is 0.3 m/s. Then the output speed should theoretically be 1 mm/s. Although in a gear pair each member has a whole number of teeth, which fixes the transmission ratio in terms of integral number of turns, the...
  16. wangp1283

    bearing loss

    Hi, can anyone give me an idea of how significant are bearing rolling losses in a gear train (or more generally, a hard rolling body on a hard flat surface). Thanks.
  17. wangp1283

    noise control

    Hi, in the application I'm designing, there is a mechanism where a small metal piece strike another metal piece at a maximum speed of 1 m/s. This will a create a sound. I wonder if it's possible to coat the metal piece with some kind of material (like rubber, or something better) that'll...
  18. wangp1283

    hydraulic gas accumulator

    On the above question, here is my own opinion, which I hope you can correct if it's wrong. If you have shut off valve between the pump and actuation cylinder. and if you close the shut off valve. It's true the POSITION will be hold, which means the belt won't "force apart" the pulley apart...
  19. wangp1283

    hydraulic gas accumulator

    Are there any difference between the following 2 applications: 1. the actuator is used to lift a "dead" load, like a steal box up a certain height. The actuator only has to control the position, and speed of the box. 2. the actuator is used to control the pulley halves of a belt CVT. Not only...
  20. wangp1283

    cam profile precision/wear

    If a linear movement of a rack is 3mm. And this rack is connected to a rack and pinion system, which is connected to a gear train with a gear ratio of 1:60. At the other end of this gear train is also a rack. So basically, a linear movement (input) will theoretically cause a linear movement...

Part and Inventory Search

Back
Top