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Old 06-18-2002 | 06:52 PM
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mr_matt
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From: Oak Park, CA,
Default JetCAT Low Battery Clarification

Originally posted by Silver182

Another situation that I think may come up more often than we might think is low volt / power for the ECU battery. Put a digital volt meter on that circuit and that to will become an eye opener.
With the Jet Cat when voltage drops to 7 volts the turbine automatically shuts off. All it takes is a weak or low battery to have that kind of flame out. The flame out can be confusing if you don't have a real time meter so you can spot the low voltage under high current pulls, like going to full throttle on a turbine. The pump motor draws it's maximum current at high throttle.



Just a note of clarification, the JetCAT will indeed shutdown at 1.0 V cell (the total voltage depends on the number of cells in the pack, you can run different cell counts with the JetCAT).

However, if you have not disabled battery checking, then you will get an inflight indication of low battery at 1.1 V cell (a throttle retard, not great but still an indication).

If you really want to get slick, you can set up a smoker system, and it will pulse the smoke to indicate either low battery, or low fuel state.

And another thing with the JetCAT you will absolutley know if a battery failure caused the shutdaown, just plug in the GSU after landing and look a tthe last shutdown condition.