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Recent content by ubrben

  1. ubrben

    Yaw damping

    If you're referring to Milliken I'd look at the moment method chapter. We've used that approach fairly successfully to develop racing tyres and the way they separate linear range stability and control from limit plow, spin or drift (flat slide front or rear in racing speak) certainly makes...
  2. ubrben

    UK Engineers Pension Scheme

    Thanks for the replies. I've decided to opt out - simply because I don't have enough confidence in the info I currently have to make the decision. I can opt-in next year so I won't lose too much if I decide it is the right option later. Ben
  3. ubrben

    UK Engineers Pension Scheme

    Thanks for the reply. I think SomptingGuy has summed it up perfectly - in principle your notional salary is the same and your basic gross pay is lower, hence any mortgage applications, pay rise, overtime, etc should be based on the notional salary. I guess the crux of the issue is the level of...
  4. ubrben

    UK Engineers Pension Scheme

    Question for all the UK engineers here. My company is introducing a new payment scheme whereby the way tax is paid changes as follows: 1 - Stop making pension contributions as a deduction from salary 2 - Company pays pension contribution directly 3 - Company reduces gross basic salary by an...
  5. ubrben

    Why use front and rear ARBs

    "New Postpatprimmer (Automotive) 5 Jan 09 17:46 I have to say hard cars low cars feel better on a smooth surface. " We're dealing here with response as well as total grip. A softer car will have more grip, but be harder to drive, because of the movement. Ben
  6. ubrben

    Lock nuts vs. pinch bolts on suspension links

    Most race cars use turnbuckle type adjusters to lengthen/shorten the pushrods to adjust ride height. Most seem to do it using jam nuts to lock the turnbuckle following an adjustment. E.G. http://www.chironworld.com/parts/images/uploads/100_0158.JPG However I noticed recently that the Porsche...
  7. ubrben

    Formula for number of bolts/bolt-holes required on a wheel

    So for a racing wheel with drive pegs and a centre lock hub the pegs are just for radial location and all the forces are reacted through friction? If that's the case then you should only need three pegs seeing as the clamping force is coming from the nut. Most cars have 6 pegs - is this just...
  8. ubrben

    Bad Coffee

    BJC - and what happens when they change the discs? Those machine are an example of the worst type of product engineering - tying youself to a product by making some engineered component that you have to buy to run it as opposed in this case to just buying coffee. Ben
  9. ubrben

    Bad Coffee

    Ok I have a two phase strategy. Part 1 is the Saeco Superautomatica bean-to-cup device in my kitchen that brews me a nice double shot of espresso into a travel mug and top up with water for an Americano that's ready for when I arrive at the office. Incidentally this was a good send when I...
  10. ubrben

    The Neverending Search

    Hi Greg - Glad you like it. I came across it on a Formula SAE discussion thread about project management. Ben
  11. ubrben

    The Neverending Search

    On the subject of personal libraries and documentation: I'm currently thinking of writing myself a Wiki of all the stuff I know (or think I know) about tyres and vehicle dynamics. This would be more focused on racing and setup engineering (i.e. practical vehicle dynamics) than theory - because...
  12. ubrben

    Global vs detail oriented brain

    For those who've commented on information hoarding, I'd like to come at it from a different perspective. It is correct to say that it's "bad business practice" to hoard and not share info. However it's also bad practice to receive praise for work that isn't yours. An example of what I mean is...
  13. ubrben

    MotoGP - coefficient of friction 55¦=1.4

    Re-read my post and had some immediate other thoughts. The riders (Carlos Checa and Colin Edwards being the best I have data for) tend not to use the absolute limit laterally in a corner – they tend to hit foot pegs on the ground, etc before that. As a result the G-G diagram as measured is very...
  14. ubrben

    MotoGP - coefficient of friction 55¦=1.4

    Hi Greg – you’re right I will have to kill you all :-) Before answering the question it’s important to know how this data’s being generated. Because of the lean angle it’s impossible to conventionally measure lateral G. Integrating roll rate to give lean angle to resolve accelerometer readings...
  15. ubrben

    Business Travel

    The fun thing about being sent on Ryanair is going in the day after and booking the 30 euro excess baggage charge on expenses :-) Ben
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