Battery box

[Waunnaboat]

Does anybody have a good battery box design for a ruddertwin?  I am thinking of something with two of these batteries in mind.  Also, how does one go about recharging this type of battery.

"Outboards seem to multiply exponentially..........I find that for every finished project, there are two more waiting to be completed."

[RICHARD A. WHITE]

You will want a battery with 10 amp hour rating…. usually can be found at Tractor Supply, or similar, as electric fence batteries…And if it says rechargeable, I use the battery tenders to keep them charged..

http://www.richardsoutboardtools.com
classicomctools@gmail.com

[Waunnaboat]

something such as this?

"Outboards seem to multiply exponentially..........I find that for every finished project, there are two more waiting to be completed."

[Waunnaboat]

Is there a particular advantage to getting a higher amp/hour battery?  I wonder because I was able to keep my ruddertwin running for around 10 minutes until the battery, which was the 4.5 amp/hr battery in the picture, started to cut out because of the lower battery charge.  I believe that the battery may have also been drained from a lot of test stand use, and that compounded with a possible lower charge to begin with when I got it could have resulted in the low run time I got out of it.

"Outboards seem to multiply exponentially..........I find that for every finished project, there are two more waiting to be completed."

[Tubs]

 

Box is just 1 by screwed together with dry wall screw. Handel is from a home improvement store. Need to pre. drill holes. On-off-on toggle switch. The lanyard was for some youngsters I was going to let run a Speedster. This is the charger I use. Came with a 2 wire plug that I have on all my motors and the battery box. Can only charge one battery at a time and the switch must be on, on the battery your charging. I believe the charging rates I have on the charger are from the manual. Used MC-1 chargers are on eBay.  Search for Motorcycle, ATV, Lawn Tractor battery charger if you want something new.   

A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.

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Waunnaboat

[RICHARD A. WHITE]

To answer your question:

An amp-hour (Ah) rating on a battery <mark class=”QVRyCf”>indicates its energy storage capacity, specifically the amount of current a battery can deliver over a period of time</mark>. A higher amp-hour rating means the battery can power a device for a longer duration before needing to be recharged. 

 

So I read that as meaning a high amp hour battery, can store more juice, thereby lasting longer.

 

Hope this helps…

 

Richard

http://www.richardsoutboardtools.com
classicomctools@gmail.com

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Waunnaboat

[Waunnaboat]

RICHARD A. WHITE wrote:

To answer your question:

An amp-hour (Ah) rating on a battery <mark class=”QVRyCf”>indicates its energy storage capacity, specifically the amount of current a battery can deliver over a period of time</mark>. A higher amp-hour rating means the battery can power a device for a longer duration before needing to be recharged. 

 

So I read that as meaning a high amp hour battery, can store more juice, thereby lasting longer.

 

Hope this helps…

 

Richard

A higher amp/hour also has the potential to deliver more current for the same time (ex: a 1o amp/hour will deliver 10 amps of power for 1 hour, or 1 amp of power for 10 hours).  As you say, it will last longer, but there could be a possibility of too much energy.  Usually modern applications will only draw the current they need, but I am not sure weather or not that is applicable to something 100 years old (especially considering that I am possibly running it on the original coil).  If you have had success with higher amp/hour batteries, then they are probably fine and I may look into them.

"Outboards seem to multiply exponentially..........I find that for every finished project, there are two more waiting to be completed."

[RICHARD A. WHITE]

Fyi, If memory serves, the Atwater-Kent timer uses .5 milliamps per contact, it is hands down the most efficient system for ignitions…

I got this info from Google…

 

An amp-hour (Ah) rating on a battery indicates its capacity, or how much electrical charge it can store. It essentially tells you how long a battery can deliver a certain amount of current (measured in amps). A higher amp-hour rating means the battery can provide power for a longer duration before needing to be recharged. 

Here’s a more detailed explanation:

• • What it measures:

    The amp-hour rating represents the amount of current a battery can deliver for a specific period of time. For example, a 10 Ah battery can deliver 1 amp for 10 hours, or 2 amps for 5 hours. 
  • How it relates to battery life:

    A higher amp-hour rating generally means a longer run time for a device powered by that battery. For instance, a 20 Ah battery will typically last twice as long as a 10 Ah battery, assuming the same current draw. 

• Not a direct measure of power:

  While amp-hours indicate how long a battery can last, they don’t directly indicate how “powerful” a battery is in terms of its voltage or wattage. 

• Important considerations:
• Current draw: The actual run time of a battery will depend on the current (amps) that the device is drawing from it. A higher current draw will drain the battery faster. 
• Battery type: Different battery chemistries and technologies (like lithium-ion, lead-acid, etc.) have different characteristics and may not be directly comparable based on Ah alone. 
• Temperature: Battery performance can be affected by temperature, with colder temperatures generally reducing capacity. 

http://www.richardsoutboardtools.com
classicomctools@gmail.com

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Waunnaboat

[RICHARD A. WHITE]

Also note,

If the ignition use .5 milliamps each time it fires the plugs and the motor turns 600 rpm, that is using 300 milliamps of electricity every minute.

300 milliamps x 30 minutes of run time is 9,000 milliamps divided by 1,000, (1,000 milliamps = 1 amp) gives the total amps used for 30 minutes, which is 9 amps used?

So with that info we need to determine the capacity of the battery and then you can figure out how long the battery will last running your motors.. I found a chart online, I will add a link to the site so you can see where all this mumbo jumbo comes from.

 

https://www.dnkpower.com/how-to-calculate-battery-run-time/#time

That amount of draw is probably why the 10ah battery is best.

I am no electrician, and I am not even sure I have done those calculations correctly, but man that was fun digging into this…

 

Somebody save me…LOL

http://www.richardsoutboardtools.com
classicomctools@gmail.com

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Waunnaboat

[Waunnaboat]

Those calculations seem to make sense.  Given that I would like to go on decently long cruises with this motor, it will be best to get some 10 ah batteries.

"Outboards seem to multiply exponentially..........I find that for every finished project, there are two more waiting to be completed."

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