Has anyone read the new Sea Kayaker magazine article about using an electric pump in a kayak. As an experiment I purchased the pump and some different size batteries. The pump mentioned from the article (Atwood V450, $13.00 at West Marine) weighs only about one or two pounds. For a tiny 12 volt motor like this what would the best battery be to use? The article says to use 8 C Nicad batteries, 1.2 volts each, this only adds up to 9.6 volts. Would this hurt the motor by using less than twelve volts. I tried two 6 volt lantern batteries, the pump was flying. Then I used a single 9 volt battery, this had a bout 3/4 the output and lasted for a 1/2 hour. I'm going to hook up the two 6 volts again two see how long they'll last. Could some one tell me what the real difference are between these batteries. The 6 volts are two pound each and I think the 9 volt weighs about one ounce. I filled a bucket with five gallons of water and the tiny little pump emptied it in less than one minute! This could really be worth while in open water. But I would still bring a manual pump for backup. Jamy *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
> Has anyone read the new Sea Kayaker magazine article about using an > electric pump in a kayak. Hi Jamy, See: http://www.paddlewise.net/topics/boatequip/elecpumps.html For a previous discussion here about electric bilge pumps. In there, I mention a gel cell 12v battery. I can now "highly" recommend such a set up. I moved the battery to the rear hatch and used a boat trailer light quick disconnect so I can easily install or remove the battery. The battery is attached by wide velcro on the bottom and one side. I rolled many times last weekend without the battery coming loose from the velcro. The battery is about the size of a single 6v lantern battery... Woody *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
For a tiny 12 >volt motor like this what would the best battery be to use? The article says >to use 8 C Nicad batteries, 1.2 volts each, this only adds up to 9.6 volts. >Would this hurt the motor by using less than twelve volts. I tried two 6 >volt lantern batteries, the pump was flying. Then I used a single 9 volt >battery, this had a bout 3/4 the output and lasted for a 1/2 hour. Could someone >one tell me what the real difference are between these batteries. The 6 >volts are two pound each and I think the 9 volt weighs about one ounce That weight difference should be telling you something. A chemical reaction produces the electricity. There's just not that much in the usual 9V transistor radio battery. You should pay attention to a spec regarding current flow and battery life, usually in units of mAh or Ah (milliampere hours or ampere hours). the 9v battery probably can't put out more than 30 milliamps adequately. it's really meant for radios and walkmen, rather than raw power such as a motor. Those 6v batteries can produce 'way more current, 500 milliamps to an amp or so. NiCds can produce very strong current flow, and that's what's important for this application. How about trying 8 Alkaline C or D cells? They too can push out the current and have a longer life than the carbon/zinc cells. *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
I have 2 6V lantern batteries connected in series inside a tupperware box. I chose dry batteries instead of the alkaline model because of the power curve--alkaline batteries sustain the same power output a long time, and then drop suddenly, while dry batteries from the very beginning drop slowly to the end. That way, if my batteries are low, I can tell before I set up for long trip. The alkaline batteries would fool me by giving a high power output, and drop when I needed them the most. The time span of the power curve of the NiCad batteries shortens with time, so they will last shorter time the longer they are used. VHF radios, on the other side, do not work well with low voltages, so it is important to maintain hight voltage to the end. That is why VHF radios work better with Alkaline batteries. something to consider, - Julio in response to: > NiCds can produce very strong current flow, and that's what's > important for this application. How about trying 8 Alkaline C or D cells? > They too can push out the current and have a longer life than the > carbon/zinc cells. > *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
This archive was generated by hypermail 2.4.0 : Thu Aug 21 2025 - 16:33:00 PDT