Tuesday, October 24, 2017

Re: [Electric Boats] E-R2AK?

 

Everglades Challenge(Water Tribe) has a class 6(open and experimental).  I am entering a solar boat in the 2018 event.  26' Bolger Sneakeasy with six 130 watt solar panels, six 100 amp agm batteries and a torqueedo cruise 2.0.

Tony

Sent from my iPad

On Oct 23, 2017, at 7:50 PM, 'electricpaddle .' joe@propelemarine.com [electricboats] <electricboats@yahoogroups.com> wrote:

 

Anybody know of an expedition-length race on real waters (like the Race 2 Alaska)  that allows solar motors?  I like the closed course races but they do little to promote long rage solar cruising.  


Joe
--



Joe Grez, president, PropEle Electric Boat Motors, Inc.


10404 428 Ave SE, North Bend Wa, 98045

The contents of this email message and any attachments are confidential and intended intended solely for the addressee(s). 

__._,_.___
Posted by: Tpernas Att <tpernas@bellsouth.net>
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (3)
Have you tried the highest rated email app?
With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.

.

__,_._,___
Posted by at No comments:

Monday, October 23, 2017

[Electric Boats] E-R2AK?

 

Anybody know of an expedition-length race on real waters (like the Race 2 Alaska)  that allows solar motors?  I like the closed course races but they do little to promote long rage solar cruising.  


Joe
--



Joe Grez, president, PropEle Electric Boat Motors, Inc.


10404 428 Ave SE, North Bend Wa, 98045

The contents of this email message and any attachments are confidential and intended intended solely for the addressee(s). 

__._,_.___
Posted by: "electricpaddle ." <joe@propelemarine.com>
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (1)
Have you tried the highest rated email app?
With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.

.

__,_._,___
Posted by at No comments:

Sunday, October 22, 2017

Re: [Electric Boats] Re: changing an outboard to electric

 

It really depends on what type of boat but 5.5 Hp electric is roughly 12H.p. I.C. so work from there.

On Sun, Oct 22, 2017 at 1:58 PM, danbollinger <no_reply@yahoogroups.com> wrote:
 

Like others have said, your 5.5Hp electric will certainly move that boat, probably up to hull speed, but not much faster, probably 6–7mph. Keep in mind that you have a planing hull, which adds drag below planing speed. While the 90Hp lower is overkill, as you said, it will swing a larger prop. I'd look for a prop that's as large as the unit will swing (but leaving a 1" space below the anti-caviting wing), and having two, narrow blades. 


 


__._,_.___
Posted by: Douglas Kay <dougkay8@gmail.com>
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (7)
Have you tried the highest rated email app?
With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.

.

__,_._,___
Posted by at No comments:

[Electric Boats] Re: changing an outboard to electric

 

Like others have said, your 5.5Hp electric will certainly move that boat, probably up to hull speed, but not much faster, probably 6–7mph. Keep in mind that you have a planing hull, which adds drag below planing speed. While the 90Hp lower is overkill, as you said, it will swing a larger prop. I'd look for a prop that's as large as the unit will swing (but leaving a 1" space below the anti-caviting wing), and having two, narrow blades. 


 

__._,_.___
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (6)
Have you tried the highest rated email app?
With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.

.

__,_._,___
Posted by at No comments:

Sunday, October 15, 2017

Re: [Electric Boats] Electric Seas

 

I just saw this - I haven't been on the site because of boat show activity. I'll check tomorrow and find out what has happened. Thanks for the alert!

On Fri, Oct 13, 2017 at 3:24 PM, acsarfkram@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:
 

Anyone know what happened to Electricseas.org ?


Mark F

Santa Cruz


__._,_.___
Posted by: Sally Reuther <smreuther@gmail.com>
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (6)
Have you tried the highest rated email app?
With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.

.

__,_._,___
Posted by at No comments:

Saturday, October 14, 2017

RE: [Electric Boats] Re: displacement & semi-displacement hull performance

 

Hi

 

The hull speed formula doesn't work for narrow boats and non standard prismatic boats, simply because those parameters were left out of the formula, for simplicity. When most boats were a similar L/b ratio and similar co-efficient it worked fine.

A hull speed formula that works for boats such as multihulls can, and is, derived.

 

Kerry Thomas.

 

From: cpcanoesailor@yahoo.ca [electricboats]
Sent: Sunday, 15 October 2017 4:38 AM
To: electricboats@yahoogroups.com
Subject: [Electric Boats] Re: displacement & semi-displacement hull performance

 

For any hull type, theoretical hull speed is only theoretical, not a law. The shape of the hull, especially the length to beam ratio has everything to do with how much theoretical hull speed applies. Or said another way, hull shape and length to beam ratio determine how steep the power/speed curve is at theoretical hull speed.

Tugboats really are displacement vessels, with a very steep rise in power needed when they approach hull speed. So steep, that they will push up huge bow waves instead of climbing onto a plane.

Multihull sailboats, like trimarans or catamarans, on the other hand, have very narrow hulls (at the waterline) for their length, and have only a nominal rise in power needed when they approach hull speed. Often so nominal that there is no noticeable difference in how the hull interacts with the water as hull speed is approached and then exceeded. There is even an argument that above hull speed, these hulls are not really planing, but so what? They go fast with not much energy required.

My understand is that semi-planing hulls trade some hull lift for a softer, more comfortable ride and better handling in rough conditions, but are still based on a lower length to beam ratio.

I noticed the Wye Island challenge entrance categories all mention limits for length to beam ratio.

(Can you tell I like skinny boats?)

__._,_.___
Posted by: Kerry Thomas <kjt@outlook.co.nz>
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (5)
Have you tried the highest rated email app?
With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.

.

__,_._,___
Posted by at No comments:

[Electric Boats] Re: displacement & semi-displacement hull performance

 

To continue into even greater extremes, there are SWATH hulls that do not plane but have very shallow power to speed curves at speeds multiple times greater than the 1.34 x waterline length squared figure. A bulbous bow can also help a full displacement hull perform well near, at, or even slightly in excess of theoretical hull speed. Hull speed is just a handy figure that does apply closely to what we regard as typical displacement hulls of conventional proportions. We know more or less what to expect from for instance an electric auxillary sailboat motoring at 1/3 hull speed vs 90% or 100% hull speed in terms of efficiency, from examining empirical data from other similar type vessels even of much larger or smaller size.

__._,_.___
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (4)
Have you tried the highest rated email app?
With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.

.

__,_._,___
Posted by at No comments:
Subscribe to: Posts (Atom)