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Showing results 1 to 25 of 158
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Search: Posts Made By: captnnero
Forum: Sailboat Design and Construction 11-14-2007
Replies: 51
Views: 27,162
Posted By captnnero
Wing this

Wing keels were injected into the mix as a means of gaining lift when constrained by draft. Anyone who sails the Chesapeake and it's gunkholes with a monohull is dealing with draft constraints...
Forum: Sailboat Design and Construction 11-13-2007
Replies: 51
Views: 27,162
Posted By captnnero
what US Naval Academy researcher ?

Last year in a similar thread I challenged the claim that research was done at the Naval Academy on wing keel groundings. To my knowledge that claim has yet to be substantiated by anyone. I went to...
Forum: Gear & Maintenance 08-02-2007
Replies: 36
Views: 3,694
Posted By captnnero
Ok CD, please understand that I only recently...

Ok CD, please understand that I only recently learned to read though I graduated a few decades ago. You see I was educated in this country.

Meanwhile we're having record barnacle growth in the...
Forum: Gear & Maintenance 08-02-2007
Replies: 36
Views: 3,694
Posted By captnnero
HS, thanks for the background. I was aware of...

HS, thanks for the background. I was aware of the basic physics for scuba but I was misled on the pressurized snorkel risks. I was taught when very young and diving the deep end in local pools to...
Forum: Gear & Maintenance 08-02-2007
Replies: 36
Views: 3,694
Posted By captnnero
what owner's manual

That's interesting...thanks for pointing that out. I didn't get an owner's manual when I bought it last year. Maybe they were in a hurry since it was backordered for several weeks when I ordered...
Forum: Gear & Maintenance 08-02-2007
Replies: 36
Views: 3,694
Posted By captnnero
pressurized snorkel

I use a Brownie pressurized snorkel I got from BoatersWorld.com for about $600. Since it only works down to about ten feet you don't need scuba training.
Forum: Gear & Maintenance 07-18-2007
Replies: 11
Views: 4,105
Posted By captnnero
look before you leap

Be careful before you buy one of these things. I've had one of these Kiwiprops for a year. They warn on their website about being overpitched in reverse and that is no joke. My max rpms in reverse...
Forum: General Discussion (sailing related) 10-26-2006
Replies: 60
Views: 5,304
Posted By captnnero
CD, I think your logic threads together but it's...

CD, I think your logic threads together but it's a bit obtuse. For me the reason to do something like diesel electric that costs more and is more complex is that it in some way it does more for you,...
Forum: General Discussion (sailing related) 10-26-2006
Replies: 60
Views: 5,304
Posted By captnnero
Jees, how many times now has someone posted to...

Jees, how many times now has someone posted to this thread that diesel electric is not new ?
Forum: General Discussion (sailing related) 10-25-2006
Replies: 60
Views: 5,304
Posted By captnnero
And now it's sold. Just as with the hybrid...

And now it's sold.

Just as with the hybrid cars it's a much more complex system. Also the needs of the transiting sailor may be quite different than the local cruiser. For ocean transits...
Forum: General Discussion (sailing related) 10-24-2006
Replies: 60
Views: 5,304
Posted By captnnero
Hellosailor, practically speaking the STI system...

Hellosailor, practically speaking the STI system requires a genset for cruising so once again there's an internal combustion engine and the generator portion of it to take care of.
Forum: General Discussion (sailing related) 10-24-2006
Replies: 60
Views: 5,304
Posted By captnnero
Yes, that's pathetic. I remember a couple of...

Yes, that's pathetic. I remember a couple of years ago they wanted over $30K to convert a 30-something-footer to their system. They want a large fortune compared to the conventional system and...
Forum: General Discussion (sailing related) 10-24-2006
Replies: 60
Views: 5,304
Posted By captnnero
The electric motor is from Solomon Technologies I...

The electric motor is from Solomon Technologies I believe. He did a write-up in Sail this year with a few photos. I don't remember anything about the genset manufacturer or power distribution...
Forum: General Discussion (sailing related) 10-24-2006
Replies: 60
Views: 5,304
Posted By captnnero
batteries, smatteries

Sailaway, maybe, may not. Did you read my post #16 and read the link ? That might address your power analysis issue. It's not just about shaft HP. The torque available from an electric motor can...
Forum: General Discussion (sailing related) 10-23-2006
Replies: 37
Views: 4,055
Posted By captnnero
CD, if you are in South Florida, GET DOWN NOW ! ;)

CD, if you are in South Florida, GET DOWN NOW ! ;)
Forum: General Discussion (sailing related) 10-23-2006
Replies: 37
Views: 4,055
Posted By captnnero
A close by strike can wipe out electronics from...

A close by strike can wipe out electronics from powerful induced currents that alternate radially out from the strike pointing in all directions. So wires that are somewhat parallel to those radial...
Forum: General Discussion (sailing related) 10-23-2006
Replies: 37
Views: 4,055
Posted By captnnero
SD, you've got it right, "get down" was a general...

SD, you've got it right, "get down" was a general term. The advice I've heard is to crouch as low as possible with your feet together to minimize ground potential differences thereby minimizing...
Forum: General Discussion (sailing related) 10-23-2006
Replies: 60
Views: 5,304
Posted By captnnero
Hellosailor, on your last post did you think...

Hellosailor, on your last post did you think maybe you were really in the Fight Club thread ? Just checking...;)
Forum: General Discussion (sailing related) 10-23-2006
Replies: 37
Views: 4,055
Posted By captnnero
About the charge dissipators, by reducing the...

About the charge dissipators, by reducing the charge they reduce the probability of being hit. It is known that when a lightning cloud (also know as cumulus-boomulus) passes over land it induces a...
Forum: General Discussion (sailing related) 10-23-2006
Replies: 60
Views: 5,304
Posted By captnnero
two for one

Sailaway, consider how many boats have a diesel genset and a propulsion diesel these days. If electric propulsion can be done well two diesels can be collapsed into one even. On the Lagoon they...
Forum: General Discussion (sailing related) 10-23-2006
Replies: 60
Views: 5,304
Posted By captnnero
Come on Chrondi, motor propulsion itself promotes...

Come on Chrondi, motor propulsion itself promotes sailing ! The weekend cruising I do wouldn't be practical without the "auxiliary" power plant. I need that thing to get me home for work Monday...
Forum: General Discussion (sailing related) 10-23-2006
Replies: 60
Views: 5,304
Posted By captnnero
apples and oranges

For the weekend sailor (most of us), a big difference in efficiency wouldn't even matter. This season is almost over for us and with heavy weekend use we've only used about 40 gallons of diesel on...
Forum: General Discussion (sailing related) 10-21-2006
Replies: 60
Views: 5,304
Posted By captnnero
Because of the relatively low power density of...

Because of the relatively low power density of batteries, any cruising hybrid vessel needs to be able to generate the cruising power from fossil fuels. The batteries are nice for close quarters,...
Forum: General Discussion (sailing related) 10-20-2006
Replies: 60
Views: 5,304
Posted By captnnero
Ok Surf, there's hope. How about a monohull...

Ok Surf, there's hope. How about a monohull version:http://www.whisperprop.de/E_7_HOME_A234DB4B662BAC6CC1256E7E0050F4BB_p.html

Or perhaps Nigel Calder's diesel-electric Malo 45.
Forum: General Discussion (sailing related) 10-20-2006
Replies: 60
Views: 5,304
Posted By captnnero
Faster, despite your intuitive analysis, in the...

Faster, despite your intuitive analysis, in the trial systems fielded some innovators have been able to downsize the diesel by about 25% as a generator yet achieve the same speeds on small yachts...
Showing results 1 to 25 of 158

 

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