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Recent content by benno

  1. benno

    Super Seven chassis design

    I built a locally produced (Sydney Australia) '7' replica and fitted it with an Isuzu 2 litre twincam. I sold the car many years ago. The construction was in probably 1" RHS 16 gauge and as a matter of preference I glued and rivetted the aluminum panels. I used a building construction...
  2. benno

    Waterski Cost effective composite with a high strength to weight ratio

    Would a switch from PVC foam to Al honeycomb provise you with any kind of appreciable weight saving? I would think that the primary weight saving on the carbon/Al honeycomb ski would be in the laminate. If you use PVC foam it limits you to wet layup as prepreg curing temps would damage the...
  3. benno

    Carbon Fiber Valve Cover

    Have a look at this http://www.nrl.navy.mil/content.php?P=02REVIEW57 and look into the operating conditions for the component. Specifically you need to ensure that the transiton point of the composite is not exceeded. The transition point is the point at which the resinsoftens and the...
  4. benno

    clock signal

    You just need an Xtal and a divider for that and maybe a flip flop buffer on the O/P to give you an accurate pulse WRT the rail. Here's the whole thing in one chip http://www.elmelectronics.com/DSheets/ELM446DS.pdf Ben Roberts Broadcast Engineer Sentient being.
  5. benno

    MIG or TIG for aluminium vehicle chassis?

    Thanks for the replies Gerald and TVP:-) I agree with you TVP, excellent summary from Gerald! Extremely useful links from you also TVP. It looks like I'll spec up the MIG machine with the aluminium stuff and get practising! CHeers! Ben Roberts. Ben Roberts Broadcast Engineer Sentient being.
  6. benno

    beginner tooling and clear-coat help

    Sounds like you are just doing some experimenting :-) For some comprehensive and free information go to http://www.spsystems.com and download their 69 page applications pdf. The glossy surface you desire is only obtainable if the surface of your mold is glossy and perfect. As lflex says...
  7. benno

    MIG or TIG for aluminium vehicle chassis?

    I have designed a light electric vehicle and I'd like to construct the chassis out of 2.5 inch , cold drawn 6061 aluminum tube. I have had conflicting opinions on whether it wold be better to MIG or TIG weld the structure. I'm aware that it will need to be heat treated after welding. I am...
  8. benno

    THE MASS PRODUCING OF A MODEL ROTORBLADE

    Hi jplot maybe a carbon fiber "pultrusion" would be the idea for this. Many companies make them some do custom shapes. Do a search on the word in Google. Ben Roberts Broadcast Engineer Sentient being.
  9. benno

    Can a Diode be used as a Resister

    Have you considered a zener diode. A zener, can set a rail voltage very accurately and in a reverse biased configuration behaves in a similar (not exact) way to a resistor in circuit. Ben Roberts Broadcast Engineer Sentient being.
  10. benno

    A Mental Challenge for Aero Engineers

    Hi all I hope that you have had some good fortune with your folks wktaylor :-) Now my contribution to the "puzzle" If an overly rough surface causes corrosion could this joint develop a static charge? The two conductive metal surfaces separated by a dielectric (oxide). Add some...
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