[PSUBS-MAILIST] K-250 progress

[Alan via Personal_Submersibles]

Alec,
didn't realise they had so few batteries. However Lithium Sulphur
batteries are edging nearer to becoming commercially available, &
they may have 20 X the capacity of lead acid batteries. 
Alan

> On 9/09/2018, at 12:14 PM, Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan, the K250 only carries three smallish batteries. The 101's are 36V, so you would need to connect them in series and they'd last next to nothing. That's why they are normally 12V boats with small thrusters. 
> 
> Best,
> Alec
> 
>> On Sat, Sep 8, 2018 at 4:44 PM Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> Philippe,
>> the Minn Kotta 101s are popular with Psubbers. I think they are about 1500W
>> or 2hp.
>> Cliff Redus has documented some recent modifications & David Columbo
>> has just acquired a number of them.
>> My thoughts are that a more powerful motor will be able to get you out
>> of trouble in a current, & that if you are worried about power consumption
>> then don't run them at full throttle. If you are just diving in lakes then current
>> is less of an issue.
>> Cheers Alan
>> 
>> 
>>> On 9/09/2018, at 5:29 AM, Philippe Robert via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> 
>>> Hi all,
>>> 
>>> I want to show you my progress of my k-250 project. This is a picture of the main part of the pressure hull with the VBT. 
>>> 
>>> I decided to put 4x100lb propane tank mounted in saddle for the MBT. I need to figure now the mounting of the motors. I see a picture on psubs at the member projets KETO:  http://www.psubs.org/projects/public/136458097811909/viewphoto.cgi/photos/large/1364582668.jpg
>>>  I think to put the  motor under the MBT with the original rotating desing. And the MBT mounted as the KETO sub.
>>> 
>>> I have a question about the motor. I want to use 2 modded minn kota trolling motors.  55 lbs is it good or I need more power ? 
>>> 
>>> Regards
>>> 
>>> Philippe Robert
>>> 
>>> 
>>> 
>>> <my k-250.jpg>
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