Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. Overrun

    Chassis torsional stiffness 1965 and today

    Karts are a different animal –no suspension and a solid rear axle. By building in chassis flex it allows the inside rear wheel to lift to avoid the two rear tire turning on differing radii from fighting each other, i.e. scrub.
  2. Overrun

    Flame Velocity vs. Ignition Timing

    Keep in mind that your original flame kernel has a very small front and burns in three dimensions. It will burn the bulk fuel charge much slower than a later large flame front. On the other hand there is also likely squish and/or tumble in the fuel charge that changes the flame travel from...
  3. Overrun

    Two-stroke cycle engine

    EHudson, you can add the German V-1 "jet" engine.
  4. Overrun

    Why Did Ford Decide to do a Flat-Plane Crank Differently?

    Did you answer your own inquiry? The UDUD is similar to the cross plane and thus perhaps can be machined on existing machine tools.
  5. Overrun

    Sealing in Ricardo's sleeve valve engines

    The sleeve valve push goes back to WW2 and Ricardo’s calculations that poppet exhaust valves would overheat with increasing engine displacement/boost. He saw the sleeve valve as the better course for this problem. It instead developed that the sodium-filled exhaust valve scaled up just fine...
  6. Overrun

    EPA & Volkswagen

    Hey 140, we don't know what else they're getting away with. Maybe more than enough to lend credibility to the test thing.
  7. Overrun

    6000 mile oil damage

    Black oil is usually suspended carbon and such. Burned oil is thick and gunky. http://www.eng-tips.com/
  8. Overrun

    Electrically non-conductive but thermally highly conductive material

    arbreen Any thought as to heat grease or thin "heat conductive" adhesive at the interface?
  9. Overrun

    Wet Cylinder Liners

    The 1300 Alfa engine I raced way back underwent many rebuilds with the same wet liners, though the time between rebuilds was maybe 20 hours run time. With electrolytic problems aside and using a torque plate when honing to tidy up the cylinder surface, no problems at all.
  10. Overrun

    Exhaust temperature reduction

    Painting both the rotomolded and exhaust surfaces silver or gold is worth a try for the cost.
  11. Overrun

    Help with spring rate.

    Norm, wouldn’t lowering the CoG decrease the roll couple?
  12. Overrun

    Radius of gyration

    If your issue is mostly turn-in, check tire temps to see if they’re pushing or not hooking up. Either Ackerman or anti-Ackerman –the latter is theoretically preferable- can help as well as relative lower front roll stiffness. Torque vectoring would really help but I have no idea as to its...
  13. Overrun

    Help with spring rate.

    A bit of a stretch, but if you’re using the height adjustment to lower the front end for competition, you’re changing camber gain, caster-trail and possible dialing in anti-dive. Anti-dive trends to stiffen the action of the suspension and may lock it up. Most competition tuning tends to be...
  14. Overrun

    Braked dyno project

    If you measure the nonaccelerating torque/horsepower and compare it to the results accelerating the engine at a known rate of RPM increase the difference should be a function of the total system inertia -I think.
  15. Overrun

    Brake Heat Rejection???

    Tbuelna, I agree with your characterization of C-C brakes –though couldn’t open your link. C-C brakes are a bit unique and live well with high temperatures –see below. But if substantial heat could be rejected real time the brakes could be even lighter and avoid retracting a hot brake after...
  16. Overrun

    Rubber o-ring head

    Very thin and rather wide vs. an O-ring?
  17. Overrun

    Brake Heat Rejection???

    Tbuelna, the C-C brakes are highly developed and do the job, particularly with thrust reversers. They require high temperatures to avoid high wear rates. Still, carbon doesn’t have a high specific heat and rejecting heat is better than storing it as in taxiing or a missed approach with...
  18. Overrun

    Brake Heat Rejection???

    Norm, we only measured midpoint rotor and pad temperatures during two brake dyno tests. The first was a “standard” test that didn’t show much at the low temperatures. However, at the end the operator offered a “burn down” that involved clamping down and running at high speed. It was supposed...
  19. Overrun

    Brake Heat Rejection???

    Tmoose, thanks -and thanks again. A bit saddening in that the Riverside tests mentioned I expect are those that killed Ken Miles. While the results are qualitatively what I would expect, it was heartening to see that the solid rotor showed the same internal and external temperatures. This...
  20. Overrun

    Brake Heat Rejection???

    Chicopee, regenerative braking and the subject vanes are actually complementary. The former is useful for low speed braking but becomes less attractive for the rare high speed braking event because of the cost and weight of batteries, cables etc. as well as the need to reserve battery capacity...

Part and Inventory Search

Back
Top