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From: D. Hess Tacoma WA (no email)
Date: Thu Oct 02 2003 - 11:11:19 EDT
Sorry wrong Alternator output curve link, that one was for a Welder Generator, but I hope you get the idea I intended.
"D. Hess Tacoma WA" <> wrote: Once the Fuel consumption vs speed profile is figured out, it occurred to me that the Alternator output should be profiled as well.
Example: If the fuel consumption vs mph was profiled and is optimized, for example at 1000 rpms, then what is the alternator output at 1000 rpms? If the alternator output profile shows max out put occurs at 3000 rpm, then perhaps an Alternator pulley modification is in order so that the Alternator and the Engine share the same rpm "sweet spot".
It does no good to purchase a High Output Alternator if you never run it fast enough to let it do it's job. For example: Here is an output curve for a Zena 150 Amp Alternator.
You can see it's Ouput is not optimized until 5500 rpm's. http://www.zena.net/htdocs/welders/weldspec3.shtml#Top
http://www.zena.net/htdocs/alternators/alt_inf2.shtml#Top
wrote:
."The dealer claims about one gallon per hour at this speed and frankly,
this is where the boat will spend the bulk of it's running time."
Know Your Objective,
marine_techguy
Tacoma, WA
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