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Johnbs letzte Aktivitäten

  1. Johnb antwortete auf das Thema Bahamas.

    I’m a member of the society but not a party to the decision. I assume it’s so it isn’t visible, 45407 has the pump between the frames but for the other two Black 5s Ian Riley fitted it under the driver’s seat just protruding below the cab side...

    23 Juni 2026 um 11:18

  2. Johnb antwortete auf das Thema Bahamas.

    Modern air brake systems use a more sophisticated distributor valve allowing gradual brake release and a faster emergency application. I’m not a driver and stand to be corrected but I would think the operation is a lot more smooth than a vac...

    22 Juni 2026 um 22:10

  3. Johnb antwortete auf das Thema Bahamas.

    Maybe it isn’t which is why I used the term future proof

    22 Juni 2026 um 16:32

  4. Johnb antwortete auf das Thema Bahamas.

    I didn’t know that, I’ve always assumed that the faster action was because of the additional brake pressure

    22 Juni 2026 um 16:04

  5. Johnb gefällt LMS2968s Beitrag in dem Thema Bahamas.

    The different air / vacuum (air pressure in reverse) are compensated by the use of bigger cylinders for a vacuum system so equalising the brake effort. A vacuum brake can be just as effective as an air system although slower acting, hence the...

    22 Juni 2026 um 16:01

  6. Johnb antwortete auf das Thema Bahamas.

    Vacuum brakes certainly are effective, less complicated and easier to maintain than a two pipe air system although less efficient as the maximum braking force is limited to atmospheric pressure, about 15psi I think. The air brake train pipe is...

    22 Juni 2026 um 14:30
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