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  • Users: CWAnthony
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  1. CWAnthony

    Shimmy - Around Steer Axis - What do you know?

    Hi all, I'm working on a project that on initial shake-down has shown symptoms of shimmy through the steering system. No data was gathered, and observation/driver accounts are not that great at the moment. We can't correlate it with any situational constants just yet (vehicle speed, a certain...
  2. CWAnthony

    Shimmy - Around Steer Axis - What do you know?

    Hi all, I'm working on a project that on initial shake-down has shown symptoms of shimmy through the steering system. No data was gathered, and observation/driver accounts are not that great at the moment. We can't correlate it with any situational constants just yet (vehicle speed, a certain...
  3. CWAnthony

    Motor and ESC Theory - Current Draw

    Hi guys, I'm trying to understand (DC brushed) motor behaviour in certain situations when coupled with a PWM ESC (powered by 24V battery). The following situation is not realistic but will help me to understand, I'd appreciate any replies. Imagine my motor is in an application (a wheeled...
  4. CWAnthony

    Equivalent Inertia - Geared System

    Hi guys, I've just been working through some info related to the titled 'equivalent inertia of a geared system' found in the following links (thanks to David Grieve for posting them, whoever you are) It's probably all simple stuff to you guys, I understand most of it except I am confused by...
  5. CWAnthony

    Schrader Valve - Male NPT Fitting

    Hi folks, I'm looking for a fitting with a schrader valve on one end, and a male NPT threaded section on the other end (most common seems to be a 1/8" NPT). There is a hex section in the middle. Does anyone know of anywhere in the UK that supplies these kinds of fittings? I am in the UK and can...
  6. CWAnthony

    Cross-connected cylinder pressures

    Hi guys, If I have two cylinders that are cross connected (as in the diagram in my link), when I add a force to one piston rod, it will not move due to the volume differences each side of the piston. The other rod will not move either, the system will be locked (right?). Let's say, input force...
  7. CWAnthony

    VALVE for flows in two pipes

    I have two pipes of equal diameter running alongside each other, as part of different circuits. Sometimes the fluid inside each pipe will be flowing in 'opposite' directions and sometimes the fluid in each will flow in the same direction. Is there a valve in existence that I could use to stop...
  8. CWAnthony

    Hydraulic Logic; linking of two inputs to one output?

    Hi all, I have a question relating to hydraulic logic, I think that's the right way of phrasing it. I am planning to connect hydraulic cylinders in a fixed volume system based below. At the moment I am considering it as an ideal system, fluid not compressible, not considering temp changes etc...
  9. CWAnthony

    Tuning Ride Frequency and Damping for Tyre Compliance

    Hi all, I've been reading up on ride rates and damping and am struggling to figure a few things out. As far as I can understand, the 'ride frequency' of the vehicle is the *undamped* frequency that the body oscillates at when disturbed by bumps. We can tune this frequency to match a certain...

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