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#1
July 18th 05, 02:28 PM
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Jose wrote:
On an aircraft with separate "battery" and "alternator" switches, should you turn on BAT and leave ALT off during engine start, or should you turn them both on prior to start? I leave alt off during start, to prevent a power surge from going through the alternator. What would be the source of this surge? If it's such a problem, why don't automobiles have alternator switches? The only reason I could come up with having an alternator switch is to make it easy to pull offline in case of a problem. 
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#2
July 18th 05, 05:04 PM
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What would be the source of this surge? If it's such a problem, why don't
automobiles have alternator switches? I don't know. But there is an avionics master also, and it is off when I start the engine for the same reason. Cars don't have that either. Jose -- Nothing takes longer than a shortcut. for Email, make the obvious change in the address.
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#3
July 18th 05, 05:22 PM
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"Jose" wrote in message ... What would be the source of this surge? If it's such a problem, why don't automobiles have alternator switches? I don't know. But there is an avionics master also, and it is off when I start the engine for the same reason. Cars don't have that either. Yeah, they do. it's just automatic. Same may go for the alternator.
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#4
July 18th 05, 08:12 PM
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"Jose" wrote in message ... What would be the source of this surge? If it's such a problem, why don't automobiles have alternator switches? I don't know. But there is an avionics master also, and it is off when I start the engine for the same reason. Cars don't have that either. My '97 Chev. Lumina has an avionics cut-out switch for starting. Come to think of it, so does my '96 GMC Sonoma pickup.
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#5
July 19th 05, 12:10 AM
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"JohnH" wrote in message ... Jose wrote: On an aircraft with separate "battery" and "alternator" switches, should you turn on BAT and leave ALT off during engine start, or should you turn them both on prior to start? I leave alt off during start, to prevent a power surge from going through the alternator. What would be the source of this surge? If it's such a problem, why don't automobiles have alternator switches? Many do but it is automatic. They don't power the buss for a second or two after start to allow the alternator circuit to stabilize.
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