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Did I cock up ?

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  • Did I cock up ?

    Last week made two new stub axles.

    Today got a phone call from china that there not happy with them.

    http://www.youtube.com/watch?v=t94NJ...layer_embedded

    Do you think leaded was a good choice of material ?
    .

    Sir John , Earl of Bligeport & Sudspumpwater. MBE [ Motor Bike Engineer ] Nottingham England.




  • #2
    Mazak I reckon
    Peter - novice home machinist, modern motorcycle enthusiast.

    Denford Viceroy 280 Synchro (11 x 24)
    Herbert 0V adapted to R8 by 'Sir John'.
    Monarch 10EE 1942

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    • #3
      Boy thatll put a crimp in his F1 race won't it? Gosh is that this weekend? I have an outdoor project I have to do for a group
      and may miss it. DARN.
      ...lew...

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      • #4
        Not today ray. My choice, 4340 hardened and tempered to 450 F. I would say you are having us on. Either your eyes are brown or you are using a rather large shovel Peter
        The difficult done right away. the impossible takes a little time.

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        • #5
          Don't be so hard on yourself John, you have to learn to walk before you can run, keep at it and some day you might make a semi- decent machinist. Till then I suggest you get a real good insurance policy and incorporate.

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          • #6
            Tell 'em you made them from high quality imported Chinese steel...

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            • #7
              It couldn't have been your fault.

              It must have been wrong installation.
              VitŮŽria, Brazil

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              • #8
                Leaded steel? Are you serious? I would have asked you guys first but I would not have made those out of C12L14. OK, that was showing off.
                Truth be told, I would've sent the guy to Mr. Stevenson.
                If you really did make those stubs, you'll have to buy him a new Chicom race car and you'll be out 100 pounds.
                Mike

                My Dad always said, "If you want people to do things for you on the farm, you have to buy a machine they can sit on that does most of the work."

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                • #9
                  Originally posted by John Stevenson
                  Last week made two new stub axles.

                  Today got a phone call from china that there not happy with them.

                  http://www.youtube.com/watch?v=t94NJ...layer_embedded

                  Do you think leaded was a good choice of material ?
                  You should have consulted Evan about the torsion... Or did you?
                  Weston Bye - Author, The Mechatronist column, Digital Machinist magazine
                  ~Practitioner of the Electromechanical Arts~

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                  • #10
                    Did you forget to include the rear wheel steering brakes? The guy could have made a few more laps on the front frame if he steered it..

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                    • #11
                      Sorta reminds me of my Ford Ranger 4x4 just south of Shelbyville IN on I-69. Amazing how uneventful it was to lose a front wheel and locking unit at 70 mph. Truck drove like it was on rails, though I was leaning a bit.

                      I just wish I hadn't tried to brake at 10 MPH, it put a nasty flat on the driver side rotor.

                      Metal content, I was coming home from a training session at Makino.

                      Clutch.

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                      • #12
                        On the red button footage they showed a super slo mo ...

                        as soon as it hit that bump (the one that broke the lotus undercarriage) it looked like the steering rack or steering linkages broke...both front wheels turned into each other ...then the 1660kw of braking energy (according to Brembo) took over.
                        It broke the 5000kgs rated steel cable tying the axles to the chassis quite easily.

                        The stub axles seemed to be in quite good condition as they flew over the cameraman and out of the circuit.

                        Rob
                        Last edited by MrSleepy; 04-17-2010, 06:45 AM.

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                        • #13
                          I notice that at 0.26 he tries to steer away from the wall....... One slight problem with that tho.. no wheels ..lol

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                          • #14
                            Originally posted by MrSleepy

                            The stub axles seemed to be in quite good condition as they flew over the cameraman and out of the circuit.

                            Rob
                            Thank Christ for that, I had visions of driving out there, flights are still banned, and having to weld them up
                            .

                            Sir John , Earl of Bligeport & Sudspumpwater. MBE [ Motor Bike Engineer ] Nottingham England.



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                            • #15
                              Originally posted by brockley1
                              Not today ray. My choice, 4340 hardened and tempered to 450 F.
                              In the 70's General Dynamics used 4340 steel for the wrist pins in the F111a swing wing fighter jets. In testing they had several failures of these pins at average stresses below 10,000 psi (so somewhat worse than mild steel).
                              Go figure, could have done as well with 1144 and had an easier time machining them.

                              What was an F111a worth, something like 80 million $US at the time 1973?

                              Tests were done after 2 augered in, one of those in the Mekong delta.

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