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Re: [Amel Yacht Owners] Re: Distributed vs. Conventional Electrical Systems
Bill & Judy Rouse <yahoogroups@...>
Craig, I more than anyone saw the smile n your face as you wrote this posting.... BUT.... It is more like, "The Times They are a Changin'"😀 Best, CW Bill Rouse Admiral, Texas Navy Commander Emeritus Amel School http://www.amelschool. 720 Winnie St Galveston Island, TX 77550 +1(832) 380-4970
On Wed, Oct 18, 2017 at 5:02 PM, sangaris@... [amelyachtowners] <amelyachtowners@...> wrote:
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Re: [Amel Yacht Owners] Re: Distributed vs. Conventional Electrical Systems
Hi Bill, Glad you were able to improve on the Captain's engineering! Cheers, Craig ---In amelyachtowners@..., <yahoogroups@...> wrote : Craig, I agree with Alan's point and before we sold BeBe I had decided to place 6 of the Blue Sea 5191 MRBF Terminal Fuse Blocks with a removeable Blue Sea BS5185 (150A) amp fuse on each of the 6 positive battery pairs on the positive post of the battery and connect the the positive lead for each pair to the newly installed terminal block fuse. My assumption was that the 500 amp bow thruster would not burn individual 150 amp fuses...I may be wrong on this. The fuses are available from 50 amps to 300 amps. Since the fuses are replaceable, I was going to buy extras. Of course, I have not tested this, so I cannot say that it works and/or whether it is the best solution. Best, CW Bill Rouse Admiral, Texas Navy Commander Emeritus Amel School http://www.amelschool.com 720 Winnie St Galveston Island, TX 77550 +1(832) 380-4970
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Re: [Amel Yacht Owners] The Times They are a Changin' - Message from Bill Rouse
Patrick McAneny
Bill, You will be missed , but certainly never forgotten !
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Thanks for Everything ,
Pat & Diane ,
SM Shenanigans
-----Original Message----- From: 'Bill & Judy Rouse' yahoogroups@... [amelyachtowners] To: amelyachtowners Sent: Wed, Oct 18, 2017 2:12 pm Subject: [Amel Yacht Owners] The Times They are a Changin' - Message from Bill Rouse All
Amel Owners and Friends,
I
have participated in this forum and with this wonderful group of people for 12
years. It has been fulfilling, educational, and occasionally entertaining.
As
many of you know, we sold BeBe to great new owners, Dan & Lori Carlson,
earlier this year. Many of you asked me to continue as part of this group and I
have tried to participate when I feel as though I have something to contribute.
You may have noticed a recent lack of participation.
And,
as some of you know, several months ago I started Amel School which gives me the opportunity to train
owners that are new-to-Amel. I also help those who want to buy an Amel to choose
the best Amel for their budget (Pre-Purchase
Consulting).
I had my 400 page Amel Book printed and bound
for my Amel School clients and I provide 24/7 Support to them. I am
proud to say that in a few months I have clients throughout the world and just
added my 20th client. Most are members of this Group.
This
brings me to what I need to post today. I am going to almost totally
remove myself from the Amel Yacht Owners Forum. I need to do this to be able to
serve my clients properly. I do hope that you understand this. In the past few
months I have been asked by a number of you about my Amel Book and other Amel
School related services. I have a parting offer for members of this Yahoo Amel
Yacht Owners Group who have owned their Amels for 2 years or longer. If you are
interested please follow this link to a hidden page on my website: Amel Yacht Owners Group.
Hopefully
we will meet (again) somewhere on the water while I am with one of my Amel
School Clients.
Best,
CW Bill Rouse
Admiral, Texas Navy Commander Emeritus Amel School http://www.amelschool.com 720 Winnie St Galveston Island, TX 77550 +1(832) 380-4970
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MAIN MAST CORROSION
Hello everyone, I have a question, I am attaching 3 images of the foot of the main mast on our older Super Maramu. It is manufactured by ISOMAT. It has never been removed. Any idea why this happened and what is the remedy if any. Should we worry about this situation? Alex Paquin SIMPATICO Older Maramu, Hull#94, 1981
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Re: [Amel Yacht Owners] NIKIMAT Illustrations & Parts for sale
Hello Alexandre,
Your descriptions and direct help in the past months have been invaluable to me and to the Group. You have documented many useful things not only for your SM but useful for other Amels. I hope you are doing better now and that you are able to sail soon again. Alex Paquin SIMPATICO older Maramu #94, 1981
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Re: [Amel Yacht Owners] Re: Distributed vs. Conventional Electrical Systems
Ryan Meador
Bill K: I agree that it is a mostly theoretical concern, but you know the difference between theory and practice, right? :D My own knowledge and sources that I trust lead me to err on the side of the simpler system, even if it is harder to source the correct fuses. Regarding the bow thruster power: I think we have to take everything in that table with a grain of salt because none of the wattages match up with the amperages. I think they're trying to convey something other than a strict electrical relationship between those numbers. I wonder if the 510A value might be the inrush current, and the 7kW the continuous power? I agree with James that "Amperage on load" probably means "under load", but implies the "amperage" column is no-load, so why aren't more of the values in the "on load" column? The bow thruster is in essence always under load. Another possibility is the thruster input power is ~9180W (510A * 18V), the output is 7000W, and thus the efficiency is a paltry 76%. Does anyone have a clamp-on ammeter that would be willing to do some science (I don't trust the battery monitor to react quickly enough to get a reliable inrush current measurement)? Thanks, Ryan SM 233 Iteration Boston, MA, USA
On Wed, Oct 18, 2017 at 4:38 PM, James Alton lokiyawl2@... [amelyachtowners] <amelyachtowners@...> wrote:
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Re: [Amel Yacht Owners] Re: Distributed vs. Conventional Electrical Systems
James Alton
Bill Kinney,
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Good point about the voltage drop. I measured mine as dropping from 13.5 (charger was on so this was not an accurate test) to about 11.75 after a 5 second burst. Does the SM have a breaker for the bow thruster and if so can you tell me the amperage? I guess that the 6.3KW rating doesn’t tell us much since we don’t know how loaded the motor is. Also, can someone tell me about how much free play is normal for a bow thruster? I can rock the prop on my thruster back and forth about 3/16” without any resistance as measured from the tips of the blades. The output shaft does not seem to have any play in it’s bearing so I assume that what I am feeling is the gear lash plus any play in the shaft to motor splines. James Alton SV Sueno, Maramu #220
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Re: [Amel Yacht Owners] The Times They are a Changin' - Message from Bill Rouse
Oh, Bill, We will miss you sorely. Given the hundreds of emails on this site, it's understandable, but will leave a large hole on the forum. I will be contacting you immediately on the "secret" page on your website. I'm still hoping to find time this winter or spring to go to "Amel School". Kent Robertson S/V Kristy SM243
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Re: [Amel Yacht Owners] Re: Distributed vs. Conventional Electrical Systems
James Alton
Bill,
toggle quoted messageShow quoted text
Thanks for showing where you got the 500 amps from. I am still confused about what the table is trying to tell us exactly. I note that there are two columns, one is labeled amperage and the other is “Amperage on load” which I am guessing might mean “Amperage under load”. Congratulations on the success of your school and for publishing your book. Does your book cover all of the Amel models or is it mainly for the SM? Your absence on the boards will be missed by myself and I am sure others. Best of luck with your endeavours. James Alton SV, Sueno, Maramu #220
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Re: [Amel Yacht Owners] Bow locker bottoms...
Thank you James, I'll try that. Kent
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Re: [Amel Yacht Owners] The Times They are a Changin' - Message from Bill Rouse
Duane Siegfri
Sorry to see you go Bill. I enjoyed meeting you earlier this month, and wish you fair winds in your new endeavor.
Duane Wanderer, SM#477
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Re: [Amel Yacht Owners] The Times They are a Changin' - Message from Bill Rouse
Mike Johnson
Dear Bill & Judy, We are both very sorry to see you depart from the forum. You have both been very part of our Amel journey since we first met in Johor Bahru. We will stay in contact and there is always a berth for you and Judy at our home or onboard Solitude. Wishing you both all the best. Mike & Peta Solitude SM2K 461
On 18 Oct 2017, at 19:12, 'Bill & Judy Rouse' yahoogroups@... [amelyachtowners] <amelyachtowners@...> wrote:
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Re: [Amel Yacht Owners] The Times They are a Changin' - Message from Bill Rouse
Porter McRoberts
This means you’ve got good air under your wings!
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Sad but thrilled for you too! Some of the best money I’ve ever spent. Thanks for all your help through the forum Bill! Porter
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Re: Companionway key
greatketch@...
Ah! Now it makes sense. The Y2 blank is unusual in that it is an especially long one...
You did find a technician who was good. We had someone try the same trick on the short blank without success... Bill Kinney SM160, Harmonie Back Creek, Annapolis, MD
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Re: [Amel Yacht Owners] Re: Distributed vs. Conventional Electrical Systems
Bill & Judy Rouse <yahoogroups@...>
Bill Kinney, I assume that you must be asking your question to Amel, because Amel is the one that published the Super Maramu 2000 Owners Manual (page attached). Amps = Watts/Volts. Watts = Amps x Volts So, either Amel is wrong with Watts or Amps, or both. Best, CW Bill Rouse Admiral, Texas Navy Commander Emeritus Amel School http://www.amelschool. 720 Winnie St Galveston Island, TX 77550 +1(832) 380-4970
On Wed, Oct 18, 2017 at 2:16 PM, greatketch@... [amelyachtowners] <amelyachtowners@...> wrote:
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Re: [Amel Yacht Owners] Re: Distributed vs. Conventional Electrical Systems
greatketch@...
Ryan,
I considered the scenario you describe, and decided it is not a worry for a couple of reasons. I agree it is a theoretical concern, but not a practical one. First, if I am drawing significantly different amperages from my 4 parallel pairs of batteries then I have very serious other problems that will kill the batteries quickly because of mismatched charge/discharge profiles that have nothing to do with the fuses. If I am drawing power close to the maximum carrying capacity of the fuse, of course one will blow first. But then the power draw from the other three immediately jumps by 33%. For fuses already on the edge, that will surely cause a very fast failure. It is POSSIBLE, but very unlikely, that the power would be shut off before the failure cascades to the other batteries. In the case of the kind of short circuit I am actually trying to protect against, of course there is not a shut off option. Finally, as fuses age, they can sometimes fail below their rated capacity. This is, I believe, the most likely way I could lose one fuse and not the others. If one fuse was to fail, and I lost 25% of my battery capacity, I would very quickly notice that by the way I monitor my battery charge/discharge cycles. That is exactly the kind of problem I am always on the look out for because it could indicated a shorted cell in one of the batteries. A potentially dangerous situation I would very much like to know about if it happens. The other problem I have found, is getting a fuse rated to interrupt 500 DC AMPS in one package gets rather difficult, and expensive. Bill Kinney SM160, Harmonie Back Creek, Annapolis, MD
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Re: Companionway key
Actually, this was not the exact key blank. Bob at ACE took a blank that was similar but a little short. He then cut into the metal at the opposite end to create the full length. And presto, new key. Works beautifully. That's why I called Bob a master key maker.
Ian Townsend Loca Loca II SM153 New River, Fort Lauderdale, Florida
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Re: [Amel Yacht Owners] Re: Distributed vs. Conventional Electrical Systems
greatketch@...
What calculation did you do to convert 7000 Watts to 510 Amps? P= V * A 510 Amps at 24 Volts = 12,000 Watts?? For what it is worth, the name plate on the motor on my older Super Maramu (they might not all be the same) is 6.3kW To get a good number, for current draw you can't assume 24 Volts. When you are drawing that much power, the voltage will drop, a lot. For really high power draws like this, it is not unreasonable to assume as low as 18 Volts. 6,300 Watts/18 Volts = 350 Amps If we do go with a 7000 watt rating, that's still "only" 388 amps. A perfectly reasonable number to protect with a 500 Amp fuse. Bill Kinney SM160, Harmonie Back Creek, Annapolis, MD ---In amelyachtowners@..., <yahoogroups@...> wrote : James, From the Super Maramu 2000 Owners Manual...it states 7,000 watts or 510 amps Best, CW Bill Rouse Admiral, Texas Navy Commander Emeritus Amel School http://www.amelschool. com 720 Winnie St Galveston Island, TX 77550 +1(832) 380-4970
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Re: [Amel Yacht Owners] Bow locker bottoms...
greatketch@...
James,
The Super Maramu deck locker gaskets are really cleverly done as made at the factory. They used a hollow "D" gasket with solid rubber inserts at the corners of the hatch to keep from over compressing the gasket and shortening its life. Like so many things on an Amel, it is a simple, elegant solution I hadn't seen before. Bill ---In amelyachtowners@..., <lokiyawl2@...> wrote : Bill, Sueno only has 50 meters of 3/8” chain plus 40 meters of 7/8” Nylon spliced to the chain. The 50 meters does not make a very large pile. I have two of the approx. 30” x 3/4” thick closed cell foam play matts that I set on the deck just aft of the sub. bow locker on to which I pile the chain. I don’t lay the chain out for rinsing because of the possible deck damage you are referring to and I don’t think that it is needed to get the salt off. There are lots of holes in the piled up chain to spray water into and just a couple minutes of rinsing seems to be all that is needed. The chain seems to dry out quickly in the sun in the Med., the line is a lot slower taking a day. I don’t bother to do this while I am cruising continuously but when I stop at a marina with water available this is one of the first tasks I attend to on the boat after getting things secured. The chain locker also gets a quick rinse and a sponging of the bottom. My drain is slightly above the bottom of the locker for some reason, I was thinking of changing this so that all of the water would drain out of the locker without any bailing. Is there an Amel reason for not having the drain at the very bottom of the locker? This is the first boat that I have owned on which the “Things to change” list has gotten shorter the longer I have owned the boat and I am being careful not to alter anything unless I am really sure it should be done. Thank you for telling me about the Super Maramus not having drains for the deck lockers, I am surprised that I missed that point and am glad to be corrected. In case it helps, I think that the drain arrangement on the Maramu was very intelligently done by Amel. There are two drains of course, Port and Stb. with cowls over the holes facing aft. But the really interesting part of the design is that a trough was created between the drains Port and Stb. so that any water that comes in one drain tends to stay in the trough and run right across and out the other side. I have never seen anything in the locker before other than some minor dampness in the areas of the drains so I think that the locker bottoms might also slope to the drains. I have also not beat to windward in more than 6’ seas nor seen more than 43 knots on this boat so maybe in severe conditions the drains are more of a problem. I am considering a minor change in the drains. It should be possible to create a baffle that would prevent the entry of any water into the lockers from the drains. It would work a little like the Aqua lift muffler to block water flowing in and allow any water that did enter to flow out of the drain when the bow lifted. The twist turns on my bow lockers don’t really apply any compression to the gasket. Are the bow locker gaskets compressed on the Super Maramu? Keeping spaces, stuff salt free and dry on a cruising boat is a real challenge, I completely agree with you. Best, James
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Re: [Amel Yacht Owners] SM Furling Motor Brush Dimensions
Hajo Hille
I've forgotten to mention the type code. It is "AB 35" Kind regards Von meinem iPad gesendet
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