Recent content by jakedehaas

  1. J

    Answering the Steel Tube Problem: Quad Bike A-Frame Strength

    ahh I see, It looks like the bolts on that front bumper could probably be used to affix some kind of tow hitch. All the best for your project, let me know how you get on or if you have any more questions.
  2. J

    Answering the Steel Tube Problem: Quad Bike A-Frame Strength

    I see what you are attempting now, excuse my ignorance. A single draw-bar would work if the front wheels were off the ground. I am thinking something like below. *EDIT* (found picture of what i was looking for. ) This way the front wheels would be off the ground and no one would...
  3. J

    How Can Torsional Vibration Absorbers Be Tested on Small Scale AC Motors?

    Thats a good idea. Using just one uni joint and then a 2:1 gear ratio would indeed give the required 4 pulses per rev. However, gears would need to be used, as using belts or chains would offer too much damping. The university should have gears, or i might have to get some machined up...
  4. J

    How Can Torsional Vibration Absorbers Be Tested on Small Scale AC Motors?

    Thanks for the reply. You are correct in that the joints should be 90 deg out of phase, but that is only if both the joints are angled the same with respect to the intermediate shaft they will cancell the accelleration effects, which in my case they are not. I will try phasing them at...
  5. J

    Answering the Steel Tube Problem: Quad Bike A-Frame Strength

    So are you trying to create an a-frame so you can tow the quad behind a car like a conventional trailer? I can't see this as a very safe or efficient or legal way of transporting a quad. With all four wheels on the ground, the quad would not tow very well. If the quad is to be towed only short...
  6. J

    Answering the Steel Tube Problem: Quad Bike A-Frame Strength

    I'm not quite sure of what your trying to do here, However, drilling a 6mm hole through a 32mm tube in a quad bike suspension is not something I would recommend doing. Placing a bolt through the hole will not remove the stress concentration caused by the drilled hole in the first place. If...
  7. J

    How Can Torsional Vibration Absorbers Be Tested on Small Scale AC Motors?

    Hi All, First time poster on physics forums, but have been looking around for a while now. Very helpful site. I'm currently undertaking a final year Mech Eng project studying the feasibility of installing a pendulum type vibration absorber onto small scale AC induction motors (1-2kw)...
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