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Re: Lightweight Starters and Alternators
Posted: Thu Nov 21, 2013 9:40 pm
by canav8
bagarre wrote:I'm putting in LED landing lights to do the same thing at a fraction of the cost of an alternator.
LED's are not always low power. I know of a bunch of LED's that use more wattage then incandescent for the same number of lumens.
Re: Lightweight Starters and Alternators
Posted: Thu Nov 21, 2013 10:13 pm
by GAHorn
Doug, that HAS to be a misprint, if we're talking about illumination diodes. Incandescent lamps typically waste about 3/4ths of their energy consumption as heat. Only a small percentage (of consumed energy by incandescents) produces light.
Re: Lightweight Starters and Alternators
Posted: Wed Nov 27, 2013 12:40 am
by n3833v
If you change to LED lights, what kind of sign off do you need? Like replacement and owner sign off or A&P sign off?
John
Re: Lightweight Starters and Alternators
Posted: Sun Dec 01, 2013 4:11 am
by GAHorn
As long as the LED lamps are direct replacements for automotive or aeromotive equivalents then no sign off is required other than to note the lamps were replaced. (This is the basis if they are "standard" parts.)
Beware: Most "white" LED lamps are a "cool" white. If they are installed behind a green or red colored lens they will not illuminate as an approved "aviation" red or green. You must use red or green LED lamps behind red or green lens/filters.)