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Aero Precision provides OEM part support for military aircraft operators across more than 20 aircraft


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Posts posted by pjvr99

  1. Dan Wilson wrote:

    What I have always been told (and it makes sense) is they changed it from the inverter position to the Ess AC position for normal ops to save some money, inverters wear out but the AC bus doesn\'t.


    Dan, this is the way I also understand it. But the boys here in the \'box do everything on the inverters, supposedly because the inverters are a more stable power supply

  2. MIL-L-7808 is a mineral oil, while 23699 is synthetic, and therefore, never mixed under normal operating conditions. Unfortunately these

    things do happen, and a simple hot drain and flush procedure within

    10(?) flying hours can correct this. While the mil-spec numbers differ,

    the performance of both types is consistant in terms of operating

    conditions and results

    Most operators turbo-jet and turbo-prop engines use Mobil Jet II, Castrol 5000 or O-156. In 20+ years of working RR-Allisons, Mobil

    Jet II has been the oil of choice. It can take a real hammering of heat

    and cold, and extended periods of operation without oil changes. Also, 2 years (or so) ago, the locals changed from O-156 to Jet II, and it

    appears the number of filter changes for filter buttons popping has

    dropped. Also after several hundred hours of operation, the Jet II

    seems to be more slippery than the O-156 was.

    For more detailed info on the oils, go to the Mobil, Shell websites

    and call up the MIL-spec info

  3. Short a few hours of sleep, so it took me a few moments to realize

    where it was - ClubJed. Must have been a while ago, as the paint schemes

    have changed, and also the ramp layout:cheer: :cheer: :cheer:

  4. The TransAll C160 can feather props without shutting down engines - makes

    for a great airshow, belting down the runway at Vmax, feathering just

    before the crowd, then going into a climb at the end, put the throttles

    to the wall, climb to +-1000ft, wing-over and battle-drop, full stop

    landing in less than 1000 feet

  5. Pork chops are \'haram\' - known as lamb chops in the sandbox

    Lighthouse - area between #2 and #3 bearing in the engine

    Snake pit - airconditioning bay in the B727, back of the fwd cargo bay

    Hog trough = horse trough

    Beaver tail = platypus tail

    Dogbones are condition lever transfer arms on the engine control gimbal

  6. Depending on where the crack is, it may intitially tend to quench the flame instead of shape it. My thoughts however tend to the flame transfer tube. Some tubes have an insert joining the cans, while others are clamped without the insert. Maybe the clamp has broken, letting in air preventing initial ignition ..... only way to really find out is to pull the turbine off :( :(

  7. Never seen it before, but a quick thought would be that the flame transfer tube/s to the other cans are damaged/missing; or, that there is a burnt/cracked can. Also may have only one exiter firing.

    Have you done a performance run?

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