[PSUBS-MAILIST] Elco Motors

Tue Apr 22 10:18:01 EDT 2014

A beer can sized nuclear reactor, steam generators the size of coffee cans, a turbine? Oh, wait. That does away with Elco. Hmm.
Vance

-----Original Message-----
From: Joe Perkel via Personal_Submersibles <personal_submersibles at psubs.org>
To: personal_submersibles <personal_submersibles at psubs.org>
Sent: Tue, Apr 22, 2014 10:10 am
Subject: Re: [PSUBS-MAILIST] Elco Motors

Vance,

Unfortunately the gen-sets are additional, not a cheap hobby by any means.

For the two smallest motors, they recommend Honda gas portable units @ 1 & 2 kilo watts. These are relatively cheap but unsuitable and dangerous for inside a PSUB. However, at 50 lbs or so, I'm considering the possibility of placing one in the well ventilated space in the sail aft of the CT for surface transit only, then handing it to the support boat on site. (Maybe!) Being self contained and simply feeding the BUS bar via a dedicated through hull, this eliminates exhaust, induction, ventilation, and cooling through hulls and systems. CO buildup and intrusion underway would not be an issue with the space I have in mind. Still, it's an inconvenient arrangement.

Better still is a 3kw dedicated marine gen-set inside. What bothers me here besides cost and complexity is the introduction of an accelerant inside. But, this would be quite the little U-Boat. Lots to look at here.

Joe

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                                                            From:                                                        via Personal_Submersibles <personal_submersibles at psubs.org>;                            
                                                            To:                                                         <personal_submersibles at psubs.org>;                                                                                                     
                                                            Subject:                                                        Re: [PSUBS-MAILIST] Elco Motors                            
                                                            Sent:                                                        Tue, Apr 22, 2014 12:44:16 PM                            

Joe,

A good idea. Paul M. reckons the dsl/elec hybrid makes for the best psub for the obvious reasons, and so did Captain K. Autonomy is good. If it's 7-8K for the entire system, I would suggest that it ain't bad, considering. Then maybe add a variation on Hank's shaftless coupling, perhaps?

Vance

-----Original Message-----
From: Joe Perkel via Personal_Submersibles <personal_submersibles at psubs.org>
To: personal_submersibles <personal_submersibles at psubs.org>
Sent: Tue, Apr 22, 2014 7:46 am
Subject: [PSUBS-MAILIST] Elco Motors

Very interesting and informative data on Elco's marine website pertaining to sizing, rates of discharge, range, and hybrid matching http://www.elcomotoryachts.com/ep-600.shtml

I don't think its possible to scratch build the reliability of these particular types of products in the electric boat industry, these are fully engineered systems. At 7-8k, its an expensive motor and would have to be inside with a rotating shaft seal arrangement, but coming from an experimental aircraft perspective the price points on these motors is a comparative bargain. I'm looking at these from a long distance surface transit standpoint for the Seehund.

Joe

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