Date   

Re: VHF antennas

Arno Luijten
 

The VHF antenna on the Mizzen is for your AIS system.


AML 54 mizzen antennas

ngtnewington Newington
 


Further to my last email


So we have the triatic weather fax antenna.
Then there is a VHF type tall antenna?
And a stubby antenna?
Also what does BLU mean? Is it French for SSB ?
You can see that the starboard mizzen backstay has an isolator top and bottom so that is my SSB antenna.
Nick
Amelia
Leros
AML54-019


VHF antennas

ngtnewington Newington
 

I am hoping that some group knowledge may help me.

I want confirmation that the antenna on the mizzen that looks like a VHF is actually a VHF antenna (spare)
Secondly I can not find the end of the cable from it to the chart table area. Any ideas?
Nick
S/Y Amelia
AML 54-019
Leros


Re: Motion Sickness

Alejandro Paquin
 

I agree with Trevor the posts on this subject is one of the best attempt to describe and explain one of the most mysterious maladies that affect sailors in general. Thanks to Bill for bringing the subject up and all that followed. I felt Scopolamine made me feel like a caffeine overdose and didn´t go well with me.I have found that Meclizine HCl works well for me and those in my crew that tend to get sick. I can suddenly become sick in calm nearly no wind situations, and survive rougher sea conditions. Still a mystery.
--
Alex Paquin
S/V " SIMPATICO"
Amel Maramu
Hull #94, 1981


Leece Neville alternator

Eloi Bamberg
 

Hello,I cant find any information about the "excitation type" of my Leece Neville 8RL3021 alternator. Does anybody know wehter it is a positiv or negativ excitation? I want to fit a Wakespeed WS500 on it.
regards,
Eloi 
SM2K 426 RedLion


Re: Bow thruster does not work in one direvtion

ngtnewington Newington
 

It seams to me, for those of us with lead acid batteries. It is important to minimise the use of the bowthruster. Having owned other boats not fitted with BT’s and manoeuvred perfectly well this is easily achieved. Using maximum 2 second bursts of the BT should be enough.
If a two second burst is not going to be enough and a difficult situation is developing then I recommend having all chargers on and/or changing plans, because if one needs the BT and it has overheated not only have you damaged your battery bank, you have placed the boat in a potentially dangerous or damaging situation.
Nick
Amelia AML54-019
Leros (back in cruising mode)


On 17 Jun 2021, at 04:38, Danny and Yvonne SIMMS <simms@...> wrote:



Hi Ken, I guess this was to me since you refer to my Super Wind 350. I pretty well agree with all you said though the only thing I might question is the need for life po batteries but that is a matter of choice.

As I said I have not measured the current draw but when I am tight reaching in 30 Knots and I roll in part of my headsail under load there is a big power draw. However all that is irrelevant. I just provided the information as an observation.

The important information is 12 years, 8 years + life out of my lead acid batteries and never running the gen set for the bow thruster. I agree with you that with a motor at idle or near idle the output of any alternator would be minimal.

Of course it is important to note the fact that, except in an emergency being swept sideways where you do not want to go, I limit my BT use to short multiple bursts. If a user puts in into use and leaves in there for long runs the situation is totally different.

Kind Regards

Danny

SM 299

Ocean Pearl

On 17 June 2021 at 11:12 Ken Powers SV Aquarius <ken@...> wrote:

I have done the measurements.  My bow thruster takes 480 Amps.  It seems there are some misunderstandings with most Alternator systems installed on the main engines, and the amount of current you will get out of your GenSet.

1. Your GenSet is usually a 6.5KW Onan, or maybe you have a bigger one, but this has nothing to do with the current supplied to the 24V system.  The current supplied to the 24V system is only a factor of the battery charger/s on board.  If you only have a 60A battery charger, you will only get 60A into your 24V battery system while running your 6.5KW Onan.

2. I don't know about you, but when I am backing into a "Parking Spot",  and I engage the bow thruster, the engine is usually at idle. "Most" alternators, on an engine at idle, don't produce much current.  If you have a 100Amp Alternator, you may get 25Amps at idle, but probably more like 15Amps at Idle.  There might be alternators that provides max current at lower RPM's, but would you want this?  

3.  Rated power output of the Super Wind 350 generator is 350Watts, which is about 12 to 13Amps into a 24V battery system.  

4.  I believe the rated power for the main outhaul and furling motors is less than 1500W.  This is less than a 60A load.  There is no comparison to the amount of current the bow thruster consumes.

So, if you have Lead Acid Batteries, and lets say your capacity is 300AmpHours...  If you use the bow thruster with no alternator, and no battery chargers, it will be over 1C, which is not so good for the batteries.  If you turn on your Genset, and your 100A charger, you are still over 1C.  And if you also have an alternator that is adding 50Amps, you are still over 1C.  

Good reason to get LiFePO4.  These issues go away.

Ken Powers
Aquarius
SM2K#262


Re: Bow thruster does not work in one direvtion

Danny and Yvonne SIMMS
 

Hi Ken, I guess this was to me since you refer to my Super Wind 350. I pretty well agree with all you said though the only thing I might question is the need for life po batteries but that is a matter of choice.

As I said I have not measured the current draw but when I am tight reaching in 30 Knots and I roll in part of my headsail under load there is a big power draw. However all that is irrelevant. I just provided the information as an observation.

The important information is 12 years, 8 years + life out of my lead acid batteries and never running the gen set for the bow thruster. I agree with you that with a motor at idle or near idle the output of any alternator would be minimal.

Of course it is important to note the fact that, except in an emergency being swept sideways where you do not want to go, I limit my BT use to short multiple bursts. If a user puts in into use and leaves in there for long runs the situation is totally different.

Kind Regards

Danny

SM 299

Ocean Pearl

On 17 June 2021 at 11:12 Ken Powers SV Aquarius <ken@...> wrote:

I have done the measurements.  My bow thruster takes 480 Amps.  It seems there are some misunderstandings with most Alternator systems installed on the main engines, and the amount of current you will get out of your GenSet.

1. Your GenSet is usually a 6.5KW Onan, or maybe you have a bigger one, but this has nothing to do with the current supplied to the 24V system.  The current supplied to the 24V system is only a factor of the battery charger/s on board.  If you only have a 60A battery charger, you will only get 60A into your 24V battery system while running your 6.5KW Onan.

2. I don't know about you, but when I am backing into a "Parking Spot",  and I engage the bow thruster, the engine is usually at idle. "Most" alternators, on an engine at idle, don't produce much current.  If you have a 100Amp Alternator, you may get 25Amps at idle, but probably more like 15Amps at Idle.  There might be alternators that provides max current at lower RPM's, but would you want this?  

3.  Rated power output of the Super Wind 350 generator is 350Watts, which is about 12 to 13Amps into a 24V battery system.  

4.  I believe the rated power for the main outhaul and furling motors is less than 1500W.  This is less than a 60A load.  There is no comparison to the amount of current the bow thruster consumes.

So, if you have Lead Acid Batteries, and lets say your capacity is 300AmpHours...  If you use the bow thruster with no alternator, and no battery chargers, it will be over 1C, which is not so good for the batteries.  If you turn on your Genset, and your 100A charger, you are still over 1C.  And if you also have an alternator that is adding 50Amps, you are still over 1C.  

Good reason to get LiFePO4.  These issues go away.

Ken Powers
Aquarius
SM2K#262


Re: For those that missed the first procurement of Rub Rails

Patrick McAneny
 

Attached are a few pictures. 



On Jun 6, 2021, at 2:59 PM, EricOpdeweegh <sv.abayomi@...> wrote:

Thanks Pat, 

Sounds great. Looking forward to some photos of the final result.

Happy Sailing
Eric
sv Abayomi SM 158 


Re: Storage Hatch gaskets

Patrick McAneny
 

Bill ,Just want to double check the size of the gasket. I had a look at mine and they are 1" wide ,but where they are not depressed ,at the edges they appear to only be about 1/2" in height and in the center that bears the weight they are depressed down to about  a 1/4" ,maybe 3/8' . I just wanted to make sure that they might not have been 1/2 or 3/4" in height originally .
Thanks,
Pat
SM Shenanigans


-----Original Message-----
From: CW Bill Rouse <brouse@...>
To: main@AmelYachtOwners.groups.io Notification <main@amelyachtowners.groups.io>
Sent: Fri, Jun 11, 2021 4:57 pm
Subject: Re: [AmelYachtOwners] Storage Hatch gaskets

Pat,

They are "D Profile: and 25mm, or 1" I think the following will work for you:

image.png
CW Bill Rouse Amel Owners Yacht School
Address: 720 Winnie, Galveston Island, Texas 77550 
View My Training Calendar


On Fri, Jun 11, 2021 at 2:37 PM Patrick McAneny via groups.io <sailw32=aol.com@groups.io> wrote:
I would like to replace the gaskets on all the storage hatches ,they are compressed and leaking somewhat. Does anyone know the dimensions and a source in the US. to buy them. I wonder if they have an adhesive backing or applied with contact cement, a backing would be less messy and easier.
Thanks,
Pat
SM Shenanigans


Re: Bow thruster does not work in one direvtion

Ken Powers SV Aquarius <ken@...>
 

I have done the measurements.  My bow thruster takes 480 Amps.  It seems there are some misunderstandings with most Alternator systems installed on the main engines, and the amount of current you will get out of your GenSet.

1. Your GenSet is usually a 6.5KW Onan, or maybe you have a bigger one, but this has nothing to do with the current supplied to the 24V system.  The current supplied to the 24V system is only a factor of the battery charger/s on board.  If you only have a 60A battery charger, you will only get 60A into your 24V battery system while running your 6.5KW Onan.

2. I don't know about you, but when I am backing into a "Parking Spot",  and I engage the bow thruster, the engine is usually at idle. "Most" alternators, on an engine at idle, don't produce much current.  If you have a 100Amp Alternator, you may get 25Amps at idle, but probably more like 15Amps at Idle.  There might be alternators that provides max current at lower RPM's, but would you want this?  

3.  Rated power output of the Super Wind 350 generator is 350Watts, which is about 12 to 13Amps into a 24V battery system.  

4.  I believe the rated power for the main outhaul and furling motors is less than 1500W.  This is less than a 60A load.  There is no comparison to the amount of current the bow thruster consumes.

So, if you have Lead Acid Batteries, and lets say your capacity is 300AmpHours...  If you use the bow thruster with no alternator, and no battery chargers, it will be over 1C, which is not so good for the batteries.  If you turn on your Genset, and your 100A charger, you are still over 1C.  And if you also have an alternator that is adding 50Amps, you are still over 1C.  

Good reason to get LiFePO4.  These issues go away.

Ken Powers
Aquarius
SM2K#262


Re: Amel 54, For those who do not really like the entrance hatch locking system

Jose Venegas
 

Perhaps my solution for the SM may work for the 54.  see my post "Making it easier to open companionway door"

Jose Venegas
IPANEMA SM 278


Re: Motion Sickness

Trevor Lusty
 

I have studied every line posted on this subject intently. Thank you to every one who has contributed and as ever, sincere thanks to Bill and Eric for introducing such in depth and informed contributors. I have been a member of the group since 2008/9 and consider this thread the most impressive and in depth review that I have seen.
I sailed my boat Seafever of Cuan SM 425 from La Rochelle to Argentina 2007/08. The only thing that made this possible for me was Scopaderm patches. Unfortunately,  by the time I had reached Brazil, due to overuse, I  had developed contact dermatitis as a reaction to the oil that transmits the drug from the patches.
I was considering giving it all up. The boat was my home and my identity, but without Scopderm, I was beaten physically and mentally with sea sickness.
The definition of seasickness for me without patches was,  incapacity to eat, drink,walk, and  all loss of normal body function, leading to dehydration which at some point was going to lead to a very serious navigation or seamanship error.
In Southern Brazil, I had the good fortune to meet Dr Omar Sanchez, a keen diver and sailor  from Argentina, who kindly accompanied me from Uruguay to Buenos Aires and subsequently far beyond.
Dr Sanchez initially saw me at my worst, (not pretty) and after our trip together reflected on my Mal de mer.
He told me that I  was as an extreme case as he had ever seen. Interestingly, this also was previously mentioned when sailing in France by Michel Charpentier!  When I invited Dr Sanchez to accompany me from Buenos Aires back to the Caribbean he agreed on the following condition.
No alcohol, no pepper, very plain food, no over standing you watch, YOU MUST HAVE SLEEP. You will sleep on the floor ( the passageway between the salon and aft cabin). Drink 7 UP, eat apples, and or, any form of ginger between meals, keep drinking fluids. No reading. No prolonged periods at the chart table. All meals cooked and prepared before departure. Use the generator and microwave to heat the meals, serve them in bowls and eat in the cockpit. Bathroom needs facilitated with a bucket in the cockpit. YOU WILL KEEP WARM.
He prescribed the following ,one Stugeron (cinnariazine) and one Kwells (hyoscine) taken the night before departure, repeat at breakfast. Then one pill of each, taken alternatively every four hours, until the end of the trip.
We experienced some challenging ocean sailing together.
The effects of the medication are, dry mouth and sometimes a taste as if you have a bad cold. The sleepiness effect is negated by the nervousness and adrenaline  we all experience before setting out to sea.
Thirteen years, and tens of thousands of ocean miles later, I have felt badly off colour twice - I had forgotten to take my pill or pills.
I have NEVER been sick since and always been in full control of myself and my vessel and therefore less fearful.
Thanks to Doctor Sanchez and the sagacious elder members of this site for their advice and support on endless subjects, I have continued to sail with more general knowledge  and  a reduced level of fear, but never without the medication.
For the naysayers, please do not criticise  this remedy and warn of possible life debilitating diseases. I am sixty seven, I have been blessed and allowed to experience people, places and experiences previously undreamed off. All I can offer is, that this solution works for me and if it helps someone else, then in some small way, it will  repay my gratitude to  others who have helped me live and sail far beyond my dreams. For me, it has all be worth it, I understand how others  have different values, concerns, and responsibilities and just like the ocean I totally respect that.
 Chantier Amel respect de la mer.

Fair winds  and well rounded  seas to all.
Trevor Lusty
Ireland

 


Re: Volvo D3-110 Sensor - Spare Sensor Sets

Rudolf Waldispuehl
 

Hi Ulrich

 

Thanks for your input. I’m try hard to find right contacts at VOLVO France but either no response or wrong question? So far I’m not happy with the feedback from Volvo.

I try with AMEL and GWEN Marine directly to find out more or getting the right path to that information.

 

BTW: it came to my mind that I owe you the Xantrex Parameter setting on my Boat. I will answer directly on your treat asap.

 

Best regards

Ruedi

 

Von: "main@AmelYachtOwners.groups.io" <main@AmelYachtOwners.groups.io> im Auftrag von Ulrich Michael Dangelmeyer <ulrich.dangelmeyer@...>
Antworten an: "main@AmelYachtOwners.groups.io" <main@AmelYachtOwners.groups.io>
Datum: Dienstag, 15. Juni 2021 um 11:18
An: "main@AmelYachtOwners.groups.io" <main@AmelYachtOwners.groups.io>
Betreff: Re: [AmelYachtOwners] Volvo D3-110 Sensor - Spare Sensor Sets

 

Hi Ruedi,

Dear Amelians with VP D3-110 C.. engines,

 

You have hit my nerve, your thought to have an assortment of the most important sensors with such a "modern" computerized engine, I had quite a while. We had an engine problem years ago in Greece where the local mechanics (not Volvo people, they were far away) did not get along. First they disassembled and cleaned the turbo, then checked the electronics with voltmeters...it was a nightmare. Last was tipped on the boost pressure sensor, which was oily and defective. But then had to be ordered in Sweden, because the Greek Volvo importer had none in stock. The sensor has cost double (about 280 €) and was mounted in half an hour. The whole hassle was for us then 3 weeks houseboat vacation. No engine, Not good. But the engine is now running fine.

Some time ago (our common concern about this issue) I then bought at a BOSCH car Service the appropriate BoostPressure sensor, suitable for the Volvo 5-cylinder engine. we checked all varieties.

 

Original BOSCH number 0 261 230 295. four-plug connection, 1 screw hole for mounting. Cost 48(!) Euro.

There was once a discussion in the forum about the matching sensor, I will soon take the new one to the ship and compare it with the defective one (I have kept). If it fits: Great. if not, he will be exchanged.

Hope that helps you further. If you get a parts list for the sensors through Volvo France, let me know. Maybe we can make a collective order for the other friends with this engine, we have synergies and can save a lot of money.(Like the passed order with UltraMarine Anchors, safe more than 1000€....)

 

Best regards, stay healthy and fair winds!

 

Ulrich Michael

„Soleil Bleu“ A54#088 (with D3-110C engine)

 

<> 

 

 

Am 15.06.2021 um 10:23 schrieb Rudolf Waldispuehl <Rudolf@...>:



Hi Courtney

 

Thanks you. Which of the Bosch sensors did you used?

Do you have a D3-110 C ?

 

Thanks and best regards

Ruedi

 

 

Von: "main@AmelYachtOwners.groups.io" <main@AmelYachtOwners.groups.io> im Auftrag von "Courtney Gorman via groups.io" <Itsfun1@...>
Antworten an: "main@AmelYachtOwners.groups.io" <main@AmelYachtOwners.groups.io>
Datum: Montag, 14. Juni 2021 um 17:03
An: "main@AmelYachtOwners.groups.io" <main@amelyachtowners.groups.io>
Betreff: Re: [AmelYachtOwners] Volvo D3-110 Sensor - Spare Sensor Sets

 

Try Bosch automotive sensors they worked for me and were very inexpensive 




On Jun 14, 2021, at 10:36 AM, Rudolf Waldispuehl <Rudolf@...> wrote:

Dear Amelia’s  

 

Because our Volvo D3-110 is running with some sensors, I try to find out which of those are most important and vital to have as spare. I do have the D3-110 C and I’m quite happy with it, but I feel better to have those sensors who could fail as spare.

 

Does anyone have a list and a source of those vital sensors?

Can anybody let us know which of those you have spare and where you ordered them?

 

@Bill Rose: Do I need to have all these sensors with isolated ground? Not sure about these?

I found some with 3 Pins, four pins and also 2 pins. The “m prop valve” Sensor has only 2 pins and therefore most likely not with isolated ground?? Correct?

Hope to get some feedback about the mystery - sensors ;-)
Happy Sailing 

Ruedi Waldispuehl
WASABI AML54-#55
Currently in Cartagena (ES)

 


Re: Resource - hinges for chain locker A54

Randall Walker
 

If you can I would treat them by painting or coating. They are such a cheap thing to have ever been factory installed.

Randall
A54#56
Grenada

On Mon, Jun 14, 2021 at 12:18 Stefan Schaufert <mail@...> wrote:

Dear Amelians,

 

18 month ago I tried to refurbish the hinges on the anchor locker/ cover door.

Without success. 

Unfortunately Maud wrote me today that the (chain locker)

„hinges for the lockers of your boat are no longer available from us.“

 

They appear to be the same as for the watertight bulkhead doors.

 

Does anybody used another resource to get this hinges?

 

Stefan

A54 #119 Lady Charlyette, currently Santa Maria, Azores



Motion Sickness

eric freedman
 

This is from one of my crewmembers

 

 

Hi Eric,

   Would love to talk with the astronaut/doctor about his experiences with space motion sickness or SMS. His comments on the etiology of motion sickness in terms of mismatch between vestibular motion detection signals and brain state regarding other detectors of motion is the leading theory among  vestibular scientists.  As I told you, that is what my specialty is, vestibular neuroscientist.  We study not just motion detection, best motion perception, inner ear disfunction, eye movement control during motion, balance, spatial orientation, and navigation. 

 

  I can tell you that as of today’s date, we only have theory about what produces motion sickness in it’s many forms, not a known physiology base that has a pharmacological intervention that works for everyone, certainly not a cure.  We (vestibular scientists) have gained a great deal of information over many decades on the subject but it remains an enigma.  We do know quite a bit about how the brain processes motion information and how multisensory integration signals in the brain and their functional imbalance is the root cause of motion perception dysfunction.  There are priors (effects of vision, proprioception, balance motor command efferent feedback) that are all individualized through experience and developmental variances that lead to differences in one person’s susceptibility over another’s. What I personally am working on for many years is the brain’s multisensory integration capacity and what happens when that integration is disrupted.

 

His comments are correct as I understand it regarding SMS.  Of course, he has personal experience as an astronaut.  I have only worked with the astronaut and cosmonaut core in the past, but not recently.  As I understand it through current scientific literature and discussion with my colleagues who do human spaceflight work at JSC, MIT, and some other places the guided use of promethazine by the astronaut core is under continual flight doc supervision, and as Bill states, it is supplemented by amphetamine to offset the drowsiness side effect of promethazine.  I am familiar with scope/dex and it’s use early in the space program, mostly at the beginning of the space station era, and we have used it in our monkey vestibular studies.  As he states, it was replaced by the current regime of promethazine and amphetamine/ephidrine. As I understand it, use of promethazine for SMS is usually given before a sleep cycle, to diminish the drowsiness side effects for awake mission performance.

 

Currently, in our scientific understanding, we know that SMS is mainly produced by an acute substantial change in the gravito-inertial acceleration (GIA) experienced with the reduction in gravity.  There is still gravity in space, but only at the 0.003g level typical at the ISS level of orbit which is several orders of magnitude less than Earth at 1g.  There is still linear acceleration force experienced in spaceflight from translational motion so the net GIA experienced during spaceflight is vastly different from that experience on Earth and the vestibular inertial detection system is quickly changed upon reaching orbit.  Again the brain has a multisensory informational change that elicits SMS.  However, unlike motion sickness at sea, it is from a loss of signal from the inertial sensing part of the vestibular inner ear, not from a continual motion dynamic like boat motion.

 

A number of studies from the  Navy and from labs (including our own) has shown that roll motion similar to that experienced on boats in the frequency range of 0.2 Hz or lower is a major effector for producing motion sickness. Pitch motion is not as provocative.  This unusual roll motion is compounded by focal vision (near viewing) high demand tasks such as reading, writing, or cooking where eye coordination to close visual targets is not matched to the boat motion and is very different from the priors stored in your brain memory for types of motion responses one is used too on stable substrates.  That is why people find relief from sea sickness by going on deck, looking at the horizon, or eliminating any form of close visual focal behavior.  That is also why some people find relief in the severity of sea sickness if the boat changes direction (downwind or similar to flatten the boat and reduce the 0.2 Hz roll component).

 

In terms of steering, that is two-fold introduction of motion signal augmentation that can help offset the vestibular mismatch experienced during sea sickness.  First, is the proprioceptive signal from the joints and muscles in your arms, hands, body torso (if seated) and all of those plus ankles/hips (if standing) that provide motion signals about position/movement to feed into the multisensory vestibular brain regions.  These same signals are known to be enhanced when an individual has vestibular ear disease, or loss of vestibular inner ear signals due to trauma or nerve cuts such as occur with certain types of cancer.  When these proprioceptive signals are enhanced with vestibular loss, this leads to an improvement in balance and a reduction in motion sickness in people with vestibular disease.  The same process happens with sea sickness.  That is believed to be the compensation component of the brain that results in many people getting used to sea motion after 48 – 72 hours after at initial sea sickness onset.  The second component of why steering helps some people is a concentration of vision away from focal tasks (near viewing) to distance viewing (horizon, steering targets in the distance, etc).

 

For drugs to be used for propholaxis and sea sickness treatment, there are many studies on the subject.  The modern science points to promethazine, cinnarizine, and hyoscine as the most effective choices.  But all have pluses/minuses, all have different dosages that are effective for different people.  Again, we are talking specifically for sea sickness, not SMS, which has a different defined cause than sea sickness, although the same medications may be efficacious for both. There is no one right answer here!

 

Most vestibular scientists that are also sailors prefer cinnarizine or hyoscine, because of the lower side effect of drowsiness which is high with promethazine.  However, once you are already experiencing sea sickness to the level of emesis, suppository promethazine is preferred.  In addition, one does not have to take an antidrowsiness amphetamine/ephedrine necessarily with cinnarizine or hyoscine.

 

Other than the papers I already sent you from scientific journals last week, here are a couple more abstract.  Hope this is helpful!

 

 

Here is the abstract of a study for cinnarizine from 1994 as an example:

 

Cinnarizine in the prophylaxis of seasickness: laboratory vestibular evaluation and sea study

A Shupak 1I DoweckC R GordonO Spitzer

Affiliations expand

  • PMID: 8004883

 

abstract

Cinnarizine was evaluated for the prevention of seasickness in a laboratory and sea study. The effects of 25 mg cinnarizine on the vestibulo-ocular reflex were investigated in 13 subjects. Significant reduction of the gain in response to sinusoidal oscillations at 0.02, 0.08, and 0.16 Hz (p < 0.05) and increased phase lead at 0.16 Hz (p < 0.01) were observed. The effect of 25 and 50 mg cinnarizine on seasickness severity was examined in 95 subjects during a voyage in rough seas. Seasickness symptoms were improved in 69% of the subjects by 50 mg cinnarizine versus 35% and 31% in the groups receiving 25 mg cinnarizine and placebo (p < 0.05 and p < 0.01, respectively). The percentage of vomiting protection provided by 50 mg cinnarizine was 63% (p < 0.05). We conclude that 50 mg cinnarizine is an effective drug for the prevention of seasickness. The reduction in vestibular sensitivity observed even after administration of 25 mg cinnarizine may explain the potency of cinnarizine in the prevention of seasickness.

 

Here is the abstract from the Royal Naval Medicine journal about cinnarizine use and sea sickness:

INM investigations into drugs for seasickness prophylaxis.

Pingree BJ

Journal of the Royal Naval Medical Service01 Jan 1994, 80(2):76-80
PMID: 7707278 

Review

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Abstract 


A summary is presented of a programme of work investigating the comparative efficacy of the two drugs most commonly used for seasickness prophylaxis in the Royal Navy, hyoscine and cinnarizine. The programme had both laboratory and sea-trial components. It was shown that hyoscine was a more effective drug than cinnarizine, but cinnarizine had less marked side effects. This comparative superior tolerability of cinnarizine decreased as motion sickness increased. Guidance is given as to the optimum indications for each drug, together with prophylactic regimens.

 


Re: Bow thruster does not work in one direvtion

Danny and Yvonne SIMMS
 

Hi Dimitris,

In 12 years I have never run the gen set when using the bow thruster. However I always use it in short bursts of two or three seconds. Occasionally in stress situations that might go out to 10. Seamanship comes in to it.

If you use it in long runs it becomes a different issue. Of course because bow thruster use is almost always when maneuvering for docking and in and out of marinas the main engine is going so its 24 volt alternator is running. Mine is only a 75amp and the motor is usually running at low revs so not at peak output. I have lead acid batteries for my house bank.

I would express an opinion that using the headsail furler under load, which I often do without the motor running, would draw more than the bow thruster. I have not measured that or calculated that though. However since that use would almost always when sailing in stronger winds ahead of the beam my Super Wind 350 generator would be pumping.

Regards

Danny

SM 299 Ocean Pearl

On 16 June 2021 at 21:59 Dimitris Krasopoulos <dkrasopoulos@...> wrote:

There are very different views if it is good to run the generator and battery charger when using the Bowthruster despite the recommendation of AMEL. Perhaps Bill Rouse or other experienced sailors have to comment on that. If the batteries are well charged by the alternator of the engine and they are not very old I need a second opinion on that issue.

Στάλθηκε από το iPhone of Dimitris Krasopoulos 

On Jun 16, 2021, at 12:24 PM, Mohammad Shirloo <mshirloo@...> wrote:

Thank you Lior, good to know. We, in general, have the generator and 100A charger on, when expecting anything other than minimal bow thruster usage, or the battery charge level is low.

Respectfully;


Mohammad Shirloo
+1-323-633-2222 Cell
+1-424-644-0908 Fax

From: main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io> on behalf of Lior Keydar via groups.io <lior246@...>
Sent: Wednesday, June 16, 2021 8:53:05 AM
To: main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io>
Subject: Re: [AmelYachtOwners] Bow thruster does not work in one direvtion
 
Hi Mohammad

I had the same problem two times. Every time, it was the solenoid on the bow thruster that did not work anymore.
If the batteries are weak and you use the bow thruster without starting the generator and charger, it can burn the solenoid. 
Every time it happened, the bow thruster worked only in one direction.

http://side-power.info/public/templates/list.php?file=../imgs/ftp_pub/MANUALS/Thrusters/SP%20Series%20(Discontinued)/IP/SP155TCi_IP.pdf&action=dl
page 19, part number 27

I hope it helps

Best
Lior A54 #18




 


 


Making it easier to open companionway door

Jose Venegas
 

The weight of the companionway sliding door on our SM and the method of locking it single-handed had forced my Admiral to quit that job on Ipanema.  After evaluating various designs I opted for a simple solution of a track-guided counterweight connected to the door with a pulley.   Although the machinist in Martinique did a terrible job with the stainless steel finished surfaces the system works very well and the Admiral can now open and close the door without complaints.  The counterweight dimensions are 20x10x3 cm which is short of the weight to balance the weight of the door but allows it to slide open in a smooth controlled manner.  The track is 1 meter long and 1 cm wide and comes with a ball-bearing sliding mechanism.  ( https://www.amazon.com/LML12B-Linear-Bearing-Variety-Length/dp/B07GQKGG9S ) 

Jose Venegas
Ipanema SM278


Here are a few pix



Downwind pole contol lines-replacement

david bruce
 

Hello, 
I am looking to create a new set of the blue,red,yellow downwind pole control lines and am looking for information about this type of line and it's sourcing.  Bills book calls it 'Tempest' but I can't seem to find any online references to this type of line and do not recall seeing it in any chandleries.   Does anyone know what brand it might be?   Also more generally is this type of line used for this application for any specific reason (besides the pretty colors) ie it's stretch or shock absorption attributes, making it important to replace like with like or less ideally could other types of line be used? 
Thank you
Dave Bruce
Liesse SN006


Re: rigging question

Bill Kinney
 

Bill,

There is no easy way to switch them.  The clevis pins are VERY different sizes, as are the holes in the chain plate.  If someone has enlarged the holes for the intermediate shrouds to the point where the upper’s pin would fit, and then put the smaller intermediate pin in the bigger hole that used to hold the upper, that’s a bad idea. I can think of no good reason for doing so.

Other than that, I can see no reason the position should matter one way or the other.  It is possible Amel wasn’t consistent, although this would be surprising.  It is more likely that Amel changed at some point, and you are seeing a model year difference.

For what it is worth, on #160 the intermediate is forward, and there would be no way to change that without modifying the chain plate.

Bill Kinney
SM#160, Harmonie
Attwood Harbor, Akins Is, Bahamas


Re: Amel 54, For those who do not really like the entrance hatch locking system

Alexander Ramseyer
 

Looks great to me.
Congrats to another good solution on you LUNA!
Alex
sv NO STRESS

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