I agree John. It sure helps to know how to calculate battery needs... so when I apply the engine cubic centimeters to cubic inch calculator it will return the engine displacement value, such that: V = 4 * 250 * π * 50² / 4 = 1,963,495 mm³ = 119.82 Cu. In. So, using Larry's rule of thumb as 1 cu. in. = 1 CCA then X 119.82 = 120 CCA required plus 20% reserve = 144 CCA. Nice. Luis On Thursday, May 16, 2024 at 06:14:28 PM CDT, <k...@bouyea.net> wrote: Larry, This is a really good post. Thank you for sharing your knowledge on this topic. John Bouyea / OR81/ Hillsboro, OR N133RM KR-2S – imported, fixed & flying www.bouyea.net/N133RM
-----Original Message----- Finally, on the batteries we use in the airplane, car, portable radio, GPS, cell phones, etc., we want the hottest (most powerful) battery available. But, there is no reason to go overboard , pay more money than necessary, if you have unnecessary capacity that you don't use. ... snip ... Understanding how batteries and cells are rated lets you decide what your needs are and spend accordingly. With you buns on the seat at 5000 feet, more is almost always better. Larry Flesner -- KRnet mailing list KRnet@list.krnet.org https://list.krnet.org/mailman/listinfo/krnet
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