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Old 02-04-2020, 09:20 PM   #11
Yo-Yo
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By the way, do you know what voltage is used for P-51 and Spitfire?

Normal cranking speed:
https://youtu.be/r-YYIgWnlbg
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Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів
There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles.
Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me

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Old 02-04-2020, 09:47 PM   #12
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Originally Posted by Yo-Yo View Post
By the way, do you know what voltage is used for P-51 and Spitfire?

Normal cranking speed:
https://youtu.be/r-YYIgWnlbg
P-51 uses probably 24VDC and Spitfire probably using something taken directly from royal navy i would guess 100-110 voltage ?
Just kidding probably same voltage
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Old 02-05-2020, 07:19 AM   #13
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Nope, 12.
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Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів
There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles.
Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me
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Old 02-05-2020, 07:21 AM   #14
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Nope, 12.
meh it does not matter you just need twice thicker electric cables
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Old 02-05-2020, 08:48 AM   #15
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Originally Posted by grafspee View Post
meh it does not matter you just need twice thicker electric cables
No, and twice lower accumulator internal resistance... As you use the same accumulator (but only 6 cells), this is, as you understand, impossible to achieve.
So, 24 V gives you more powerful starting moment... even with the same starter nominal power.
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Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів
There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles.
Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me
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Old 02-05-2020, 03:37 PM   #16
grafspee
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No, and twice lower accumulator internal resistance... As you use the same accumulator (but only 6 cells), this is, as you understand, impossible to achieve.
So, 24 V gives you more powerful starting moment... even with the same starter nominal power.
In order to achieve same power level you will have to use exactly same number of battery cells 24V or 12V does not matter for 24V you would use simply 2 X 12V connected in line and for 12V system you would use 2 x 12v connected parallel. If there would be any difrence it would be small.
I would say that 12V starter would have noticeably lower rated power then 24v so it would have greater reduction gear in order to crank engine and lower cranking speed will be provide at same time.
3kv 12v starter would be gigantic comparing to 24v
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