marinheiro 364 Posted March 24, 2021 Share Posted March 24, 2021 1 hour ago, aardvarkash10 said: Who is this Bill Falconer of which everyone speaks? Big Bill "spreader of grease" Falconer is a Yanmar agent/service guy who mainly works around Westhaven. Did the new install on my boat and many others. Has/had a half share in the Stewart 34 Princess Quote Link to post Share on other sites
ex Elly 258 Posted March 25, 2021 Share Posted March 25, 2021 Bill is the "overall man of action"! Quote Link to post Share on other sites
aardvarkash10 1,103 Posted March 25, 2021 Share Posted March 25, 2021 ...and it turns out he answers the phone and gives coherent and intelligent answers even when he's on holiday! 1 Quote Link to post Share on other sites
Black Panther 1,765 Posted March 26, 2021 Share Posted March 26, 2021 Must be over 60. Quote Link to post Share on other sites
The big T 45 Posted March 26, 2021 Share Posted March 26, 2021 70 Quote Link to post Share on other sites
wild violet 38 Posted March 27, 2021 Share Posted March 27, 2021 I know a bloke on a cav who switched the engine to a yanmar and couldnt find a v drive to suit so got two big toothed alloy cogs made up and found a toothed belt to suit,looks like a harley davidson belt drive system.Works great dont think he has replaced the belt in years. 1 Quote Link to post Share on other sites
Martin Wright 1 Posted March 28, 2021 Author Share Posted March 28, 2021 17 hours ago, wild violet said: I know a bloke on a cav who switched the engine to a yanmar and couldnt find a v drive to suit so got two big toothed alloy cogs made up and found a toothed belt to suit,looks like a harley davidson belt drive system.Works great dont think he has replaced the belt in years. Hi Wild Violet This is a really exciting idea and it's great to hear someone has actually done it. I'll go back to Moon Engines and ask the if they could build something like that. One advantage of a motorbike belt system is that the lubrication requirements may be much simpler and the whole thing can be maintained by me from time to time. Do you know how I could contact the "bloke on a cav"? Martin Quote Link to post Share on other sites
Martin Wright 1 Posted March 28, 2021 Author Share Posted March 28, 2021 Hi Everyone A couple of you aqsked for photos of the problem. Here's two phiotos showing the corroded / broken threaded bindings on the v-drive case. You can see that the unit is generally corroded. Sad situation that it was still working fine inside despite the issues on the outside. In another update, the guys at Moon Engines advised replacement. But I'm gonna chat to them again about a simpler cog and belt system and ge their reaction. I have really appreciated everyone's comments and advice. I will let you know how things develop. Happy sailing. Martin Quote Link to post Share on other sites
jim s 34 Posted March 28, 2021 Share Posted March 28, 2021 It's impressive that after 47 years or so the working parts are likely still good and it's only corrosion that's getting the better of it...I use a small Foundry for one-offs at reasonable prices in my engineering work . A possibility is to replace the casing half (or halves) and save on doing any other mods/retrofitting. Perhaps send me a pm if that interests you. 1 Quote Link to post Share on other sites
syohana 37 Posted March 29, 2021 Share Posted March 29, 2021 We use timing belts on some of our electric drive systems. The difference is the shafts must be completely parallel so it would be a = drive not a V drive. Not suitable to replace most V drives which have an angle between the shafts like the name suggests. You'd also need thrust bearings and a frame to hold and tension the belt so it's not a trivial thing to build. this sounds like another good opportunity to go electric Quote Link to post Share on other sites
Fish 0 Posted March 29, 2021 Share Posted March 29, 2021 On 28/03/2021 at 2:09 PM, Martin Wright said: Hi Everyone A couple of you aqsked for photos of the problem. Here's two phiotos showing the corroded / broken threaded bindings on the v-drive case. You can see that the unit is generally corroded. Sad situation that it was still working fine inside despite the issues on the outside. In another update, the guys at Moon Engines advised replacement. But I'm gonna chat to them again about a simpler cog and belt system and ge their reaction. I have really appreciated everyone's comments and advice. I will let you know how things develop. Happy sailing. Martin Wow, looks like you got your money's worth out of that You could possibly utilise a python drive / thrust bearing with CV joint in the set up. From my investigations at the time, they cost as much or more than a new gearbox though (noted I don't know what a V drive box costs), but I did exchange a new down angle GB for another one with a different ratio with Moon Engines. If you go with a belt drive and thrust bearing would you still need a regular GB off the engine? Quote Link to post Share on other sites
marinheiro 364 Posted March 29, 2021 Share Posted March 29, 2021 41 minutes ago, Fish said: Wow, looks like you got your money's worth out of that You could possibly utilise a python drive / thrust bearing with CV joint in the set up. From my investigations at the time, they cost as much or more than a new gearbox though (noted I don't know what a V drive box costs), but I did exchange a new down angle GB for another one with a different ratio with Moon Engines. If you go with a belt drive and thrust bearing would you still need a regular GB off the engine? The Python drive only helps for alignment issues. To go belt drive a new gearbox is required with a top lay shaft with bearings at each end. The propshaft will need to terminate in a bearing that can accommodate both thrust and sideways loadings Gear boxes are not designed to take the sideways loadings present in this type of installation Quote Link to post Share on other sites
Martin Wright 1 Posted March 30, 2021 Author Share Posted March 30, 2021 On 30/03/2021 at 8:14 AM, Fish said: You could possibly utilise a python drive / thrust bearing with CV joint in the set up. F I wasn't ware of the Python Drive so thanks for that. The boat was using universal joints and a "spider joint" to account for alignment issues. Thatn worked okay. Quote Link to post Share on other sites
Martin Wright 1 Posted March 30, 2021 Author Share Posted March 30, 2021 On 29/03/2021 at 10:28 PM, syohana said: We use timing belts on some of our electric drive systems. The difference is the shafts must be completely parallel so it would be a = drive not a V drive. Not suitable to replace most V drives which have an angle between the shafts like the name suggests. You'd also need thrust bearings and a frame to hold and tension the belt so it's not a trivial thing to build. Awesome, Syohana! You and Wild Violet are thinking along the same lines. I will put the to Moon Engines. Do you know of a workshop that can make this sort of stuff? Quote Link to post Share on other sites
Fish 0 Posted March 30, 2021 Share Posted March 30, 2021 38 minutes ago, Martin Wright said: I wasn't ware of the Python Drive so thanks for that. The boat was using universal joints and a "spider joint" to account for alignment issues. Thatn worked okay. If you have only minor mis-alignment and everything is basically straight, you can use a CentaFlex coupling. Far cheaper than a python drive type arrangement. We put one on, very good at removing vibration and is more forgiving to engine misalignment. The NZ supplier isn't coming up in google searches straight away. If you are interested I can find it, and the tech spec sheets for deflection and size / forces etc. centa_kupplung_cf_m_127_700x700.webp Quote Link to post Share on other sites
Martin Wright 1 Posted March 30, 2021 Author Share Posted March 30, 2021 That's awesome Fish. This is the kind of info I need. Main focus for now is the v-drive. Quote Link to post Share on other sites
Martin Wright 1 Posted March 30, 2021 Author Share Posted March 30, 2021 I just spoke to "Jim S" who offered his brother's foundry service, and Jim himself runs a tooling workshop. We had a great conversation about making new moulded casings and then reassembling the whole unit. It's an attractive idea because I would get something that fits into the current space and wouldn't need to reshape the interior. Big should out to him. I'm still in conversations with Moon Engines and with Argo in Ozz. Slow progress. Stay tuned. Quote Link to post Share on other sites
Martin Wright 1 Posted March 30, 2021 Author Share Posted March 30, 2021 I should add, that my old unit is not strictly speaking a v-drive. It's a parallel system with a 1:1 ratio. Much simpler than the Argo V-Drives. Quote Link to post Share on other sites
syohana 37 Posted March 30, 2021 Share Posted March 30, 2021 1 hour ago, Martin Wright said: Awesome, Syohana! You and Wild Violet are thinking along the same lines. I will put the to Moon Engines. Do you know of a workshop that can make this sort of stuff? If you had a workshop do the work for you as a one off then you may need to win the lottery first on the labour time alone, but it might be possible to make the frame yourself if you have plenty of spare time. Lightning Bolt in Auckland are very good for making up custom shafts and flanges, they might even do the whole job. The simplest approach for a one-off is using U section alloy or steel frame bolted together like the Electric Yacht system we are currently selling on our website. the photos here should give you the idea: https://electricboat.co.nz/index.php/product/electric-yacht-5kw-10hp-equivalent-shaft-drive-motor/ PS why not just buy this system and dump the whole diesel? This motor is so compact it will fit without a V drive. Quote Link to post Share on other sites
wild violet 38 Posted March 31, 2021 Share Posted March 31, 2021 On 28/03/2021 at 1:45 PM, Martin Wright said: Hi Wild Violet This is a really exciting idea and it's great to hear someone has actually done it. I'll go back to Moon Engines and ask the if they could build something like that. One advantage of a motorbike belt system is that the lubrication requirements may be much simpler and the whole thing can be maintained by me from time to time. Do you know how I could contact the "bloke on a cav"? Martin Hi Martin, Bloke with the drive unit is Phil Zwiess lives on board at Picton,Boat is called Cavall.Has circumnavigated in her best set up cav ive ever seen Quote Link to post Share on other sites
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