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Re: [Amel Yacht Owners] Re: Volvo D2-75 for a SuperMaramu
greatketch@...
Graham,
Like you I think a lot of sailboats are significantly overpowered because that is what people think they want. Your thoughts on the Beta 60 are interesting, and I'll follow carefully what you end up doing and how it works for you. None-electric and non-turbo is nice. The weight is also a good match. Just a couple things to be sure of... The Volvo specifications I have are rated at the output shaft of the transmission, be sure that the Beta HP ratings are the same. You can easily lose 5% in the transmission. and another 3-4% in the C-drive. The Beta 60 lists its HO at 2700 as 56HP, the Volvo graph I have shows theTMD22 as about 62 at 2800. That's enough difference that it is starting to matter. For what is is worth (and it's not all that much) using standard sizing calculations, and assuming a fully loaded displacement of 38,000 lbs and a LWL of 41.25ft, the HP needed AT THE PROPELLER for a SM looks like this: 6.4 kts 31.3HP 7.0 kts 40.6HP 7.4 kts 47.6HP 7.7 kts 54.1HP 8.0 kts 61.2HP 8.5 kts 72.0HP I'd add 4% to account for loss in the C-drive if the engine is rated for transmission output. If the engine was rated for output from its shaft, I'd add 10%. My thinking is I'd start to worry that the Beta60 might be cutting it a bit close on the lower end... depending on exactly what you want your engine to do. Bill Kinney SM160, Harmonie Fort Lauderdale, FL, USA ---In amelyachtowners@..., <crwggb@...> wrote : The answer to all this is in the torque curves. As you say Danny 2800 is the max on the Amel TMD22A installation. This effectively limits its max OP to approx 60HP. I have been very happy with this performance for the past 14 years as are many other owners. Looking at the torque curve for the TMD you will see max torque is at around 2500 RPM, hence its susceptibility to a fowled prop/bottom. Compare that to the hugely bigger torque at similar RPM on the D2-75 and that is why it will push through to its advertised rpm despite the fowling. Amel should really have rebadged the TMD22A with a 60HP label.... but of course thats not what sells boats! Given that I've been very happy with a "60HP" engine for all these years its the main reason I'm looking at the BETA 60. It has no turbo and no electronic control boxes and will fit very comfortably in the space. At cruising RPM (2000 to 2100) that will give 7kts it produces 170nm torque compared to the TMD22A...same RPM but153nm torque. The beta tops out at 2700 rpm. So essentially it does exactly what the tmd22a has been doing all these years...but without the turbo. The BETA man is coming to the boat on Monday I'll keep you posted on how it all goes. Graham
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Re: [Amel Yacht Owners] Rocna anchor
Arthur Sundqvist
Thank you for sharing your resersh and knowledge.
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Kind regards Arthur SM435. Vista Skickat från min iPhone
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Re: [Amel Yacht Owners] Re: Rocna anchor
Highly recommend the 40kg Rocna. After bending the shaft on the original 30kg Bugel (see YouTube How to straighten a bent boat anchor) the Bugel bent whilst being dragged in 40 knot winds. The new 40kg Rocha sets and has stayed put in 40 knot winds. The Rocha fits perfectly on the starboard double roller with the straightened Bugel next to it. We slept peaceful nights this last 6 months anchoring all through the Adriatic. Would say the 40kg Rocha is perfect for the AMEL.
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Barry and Penny “Lady Penelope II” Amel 54 #17 Marina di Ragusa. Sicily
On Nov 16, 2018, at 11:58, trifin@... [amelyachtowners] <amelyachtowners@...> wrote:
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Re: [Amel Yacht Owners] Rocna anchor
greatketch@...
10mm G40 (or 3/8" HT)
If you want a slightly stronger chain look for Maggi Aqua4 brand 10mm chain that will work as well. There might be other brands that boast higher than "standard" strengths as well. When sizing chain you can size it "forward" or "backward." If you size it "forward" you calculate the size chain you need to hold your boat in the worst conditions you ever expect to anchor in. Amel selected 10mm chain, and this seems a good choice to me. With a good stretchy snubber, and care on selection of connecting bits 10mm chain should be fine for this boat. Sizing an anchor "backward" is using the maximum holding power of the anchor in good conditions then using that number to figure chain size. This is how Rocna comes up with their recommendation of 11mm for a 40kg anchor. Most cruising boats will oversize their anchors at least a little to help when anchored in bottoms that are less than ideal. There really is no significant benefit to increase the chain strength as well. Bill Kinney SM160, Harmonie Fort Lauderdale, FL, USA
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Re: [Amel Yacht Owners] Rocna anchor
on my old Super Maramu built in 1991, hull number 56 the 40 kg Rocna did not fit therefore I fit a 33 kg which worked perfectly.
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fair winds Robin Amel 54 #54 (2007) Carré d’As Gesendet von Yahoo Mail für iPad Am Donnerstag, November 15, 2018, 23:07 schrieb Kent Robertson karkauai@... [amelyachtowners] :
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Re: Rocna anchor
Hi Arthur,
We have a 54 not SM. We ditched the original 30kg Bugel and replaced with 40kg Rocna. No change needed to bowroller on 54. Not so pretty, but now we have an anchor that works reliably for us. 10mm chain. Dean SY Stella A54 #154
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Re: Power draw at anchor
I did put a spst switch at the fuel gauge to eliminate that draw. As well, I have made the "permanent" converters (24v/12v) switchable. I had one other mystery draw and that was high-water alarm/bilge pump switch which had an electronic sensor and drew a small current all the time. At the start of my quest I had about 0.38a draw but it's a zero now when everything is shut down. If you have any fixtures that have USB charging ports, they will draw a little with their converters as well. Finally (I had to chase a 12v leak as well) if there is any build up of calcium or other corrosion on connectors to pumps or other hardware that might be a way for tiny amperage leaks to find a way to ground. Gary W. s/v Adagio, SM 209 Gran Canaria
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Re: [Amel Yacht Owners] Re: Volvo D2-75 for a SuperMaramu
Thanks for sharing your thoughts. If you don't mind sharing with us what a beta60 is going to cost for the engine above earth. and what panel you chose.
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In your area of the world . I think many of us who are going through the process would be grateful.
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Re: [Amel Yacht Owners] Rocna anchor
Arthur Sundqvist
10. Or. 12mm. Chain?
Arthur SM 435. Vista
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Re: [Amel Yacht Owners] Re: Volvo D2-75 for a SuperMaramu
Graham Boyd
The answer to all this is in the torque curves. As you say Danny 2800 is the max on the Amel TMD22A installation. This effectively limits its max OP to approx 60HP. I have been very happy with this performance for the past 14 years as are many other owners. Looking at the torque curve for the TMD you will see max torque is at around 2500 RPM, hence its susceptibility to a fowled prop/bottom. Compare that to the hugely bigger torque at similar RPM on the D2-75 and that is why it will push through to its advertised rpm despite the fowling.
Amel should really have rebadged the TMD22A with a 60HP label.... but of course thats not what sells boats! Given that I've been very happy with a "60HP" engine for all these years its the main reason I'm looking at the BETA 60. It has no turbo and no electronic control boxes and will fit very comfortably in the space. At cruising RPM (2000 to 2100) that will give 7kts it produces 170nm torque compared to the TMD22A...same RPM but153nm torque. The beta tops out at 2700 rpm. So essentially it does exactly what the tmd22a has been doing all these years...but without the turbo. The BETA man is coming to the boat on Monday I'll keep you posted on how it all goes. Graham
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Re: [Amel Yacht Owners] Rocna anchor
Arthur Sundqvist
Thank you. Here in. Stockholm winter is coming.
Do you use 12 or 10 mm chain ? Kind Regards Arthur SM 435. Vista
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Re: [Amel Yacht Owners] Rocna anchor
Arthur Sundqvist
Thank you. Bill for always thinking two steps ahead.
12 or 10 mm chain??? Best Arthur SM 435, Vista
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Re: [Amel Yacht Owners] Rocna anchor
Arthur Sundqvist
Thank you. Sounds. Good. Do you har 10 or 12 mm chain?
Arthur SM 435 Vista
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Re: [Amel Yacht Owners] Rocna anchor
James Studdart
We also use a 40kg rocna. Flawless, we’ve never dragged once it’s set.
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Cheers, James. SeaBean, SM344
On Fri, Nov 16, 2018 at 17:39 Kent Robertson karkauai@... [amelyachtowners] <amelyachtowners@...> wrote:
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New file uploaded to amelyachtowners
amelyachtowners@...
Hello,
This email message is a notification to let you know that a file has been uploaded to the Files area of the amelyachtowners group. File : /Cordage types.docx Uploaded by : alan_leslie_sv_elyse <divanz620@yahoo.fr> Description : Good clear explanation of different types You can access this file at the URL: https://groups.yahoo.com/neo/groups/amelyachtowners/files/Cordage%20types.docx To learn more about file sharing for your group, please visit: https://help.yahoo.com/kb/index?page=content&;y=PROD_GRPS&locale=en_US&id=SLN15398 Regards, alan_leslie_sv_elyse <divanz620@yahoo.fr>
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Re: [Amel Yacht Owners] Rocna anchor
I made a mock-up out of heavy cardboard using full sized drawings from Rocna before ordering.
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Kent Robertson
On Nov 15, 2018, at 5:17 PM, Bill Rouse brouse@... [amelyachtowners] <amelyachtowners@...> wrote:
Please remember that not all bow rollers are the same on all SMs. 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 On Thu, Nov 15, 2018 at 4:07 PM Kent Robertson karkauai@... [amelyachtowners] <amelyachtowners@...> wrote:
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Re: Rocna anchor
greatketch@...
Arthur,
Everyone I know of who uses a Rocna on a Super Maramu uses a 40kg/88lb model. The next size smaller is a 33kg, which is on the small side, and the next size larger is a 55kg which is getting very large to fit on the bow. Bill Kinney SM160, Harmonie Fort Lauderdale, FL, USA
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Re: [Amel Yacht Owners] Wash your- Main outhaul rope
Danny and Yvonne SIMMS
Thanks Eric. I have bought another dyneema 12mm line with a more abrasive outer. I will try that but thanks for the tip. Regards Danny Sm 299 ocean pearl
On 16/11/2018 11:06, "eric kimberlite@... [amelyachtowners]" <amelyachtowners@...> wrote:
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Re: [Amel Yacht Owners] Rocna anchor
Please remember that not all bow rollers are the same on all SMs. 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
On Thu, Nov 15, 2018 at 4:07 PM Kent Robertson karkauai@... [amelyachtowners] <amelyachtowners@...> wrote:
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Re: [Amel Yacht Owners] Re: Volvo D2-75 for a SuperMaramu
John Clark
Agree with Dan, my TMD-22 4500hrs at 2016 survey with clean hull and prop maxed at 2750rpm at 7.5kts. Just before haulout this year with some minor hull growth, and a few barnacles on the fixed prop she was down to 2400 rpm and 5 kts top speed. After we relaunched with fresh paint and clean prop she was right back to survey performance. If the new Volvo has a computer I would rather stick with the TMD-22 or look for something without a computer. The TMD-22 may not be as high performance as a brand new engine but it is reliable at least it has been for me the last two years. John Clark SV Annie SM 37 Le Marin
On Thu, Nov 15, 2018 at 2:58 PM Danny and Yvonne SIMMS simms@... [amelyachtowners] <amelyachtowners@...> wrote:
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