Fah Kiew Tu

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Everything posted by Fah Kiew Tu

  1. Fah Kiew Tu

    Another Interesting Home Built Steel Boat

    So basically you're not going to defend your original claim WRT 'significant stability'. Fine. You've now made another really broad claim that 'lighter materials are better'. Want to argue that one now? Carbon fibre masts & spars always better than anything heavier? What definition of 'better' are you using? This is getting boring though. You have your opinions based on whatever personal experiences you have, I have mine. I don't care what you sail, where or how. As far as I can tell, you've always just sailed boats other people have designed & built and you're neither a designer nor builder nor engineer yourself. What you say here isn't going to affect what I build or do. It's like the people telling me that I can't possibly build a junk rig boat because everyone knows they don't point as high as a Marconi type rig. Duh. That would only be important if I cared about giving up that 5 deg or so. FWIW there is 15kg mass difference between 125NB Sched 40 aluminium masts and 100NB Sched 10 steel masts in the lengths I need. If I really, really wanted to keep the mass the same I could just go to Spectra rigging instead of steel; I've got some 500m of 8mm Spectra in the shad right now. It isn't important. Also FWIW the original hull design was ballasted with boiler punchings in concrete. I'm using lead as is the sister ship PANOPE. FKT
  2. Fah Kiew Tu

    Another Interesting Home Built Steel Boat

    You think? Define 'significant' in this context. The designer - and I - know damn well that the steel tube is heavier than aluminium. Do you think that you know more about the tradeoffs on this hull design than the designer did? Short form - is a lighter mast tube always better than what the designer specified? If so, why so? I think you're about to dig yourself a deep hole here. FKT
  3. Fah Kiew Tu

    Another Interesting Home Built Steel Boat

    See comments WRT junk rig. You don't 'attach' the sail with mast track, it's held by a series of parrels. I used galvanised Sched 10 steel tube so no taper anyway. As I said, as per designer drawings. Said designer's personally built vessels also rigged in this manner. I know of one local boat, also junk rigged, that used spiral wound/welded steel masts to get some taper. But that was on the big north island, too much hassle in Tasmania. It is heavier than aluminium pipe but not that much because it's also a lot stiffer so can get by with a smaller section. FKT
  4. Fah Kiew Tu

    Another Interesting Home Built Steel Boat

    Come on. I built a junk rigged boat. Do you think I *have* any dignity? Or care factor? FKT
  5. Fah Kiew Tu

    Another Interesting Home Built Steel Boat

    That depends on the rig you're using. I have steel tube masts as per designer's drawings. So what am I giving up? FKT
  6. Fah Kiew Tu

    Another Interesting Home Built Steel Boat

    There was some comment he made about how a bandsaw would be better but that would have cost him $400 and he wasn't prepared to pay it. I guess he'd shit an entire pallet of bricks if he knew what my USA made Grob Bros bandsaw cost....... FKT
  7. Fah Kiew Tu

    Another Interesting Home Built Steel Boat

    Yeah. As I said, words fail me. I'd be wondering if the whole thing wasn't just an elaborate internet windup if I hadn't seen the amount of work he's putting in. 1/100th of that time actually thinking would have been good. Let's see - I'll weld in pissy undersized frames (thereby introducing truly impressive distortion) then attach structural wooden stiffeners using aluminium channel - *or* I could have actually made the frames the proper dimension in the first place - what *shall* I do........ FKT
  8. Fah Kiew Tu

    Another Interesting Home Built Steel Boat

    The latest episode is out. Words fail me - you have to see it for yourself. FKT
  9. Fah Kiew Tu

    Stun Guns: Dangerous and Unusual?

    I quite like the idea of legal stun guns myself; I have a little list of people who could serve nicely as targets. Even better, a vehicle mounted one where you could shoot the dickhead in front of you and fry all the electronics in his car. Though technically that'd be a directed EMP gun I suppose. FKT
  10. Fah Kiew Tu

    Girl with patreon account goes sailing in hot place

    Various vloggers' desire to make, post & profit from their making movies is fine. Some may be doing it as a purely commercial thing, others as a way of showing others interesting places/interactions, sailing, boats et al. Their desire to do this and place the results in the public spaces in no way obligates me to actually give them any money, morally or ethically, regardless of whether I watch one, all or none. In fact I think paying some people to *stop* posting would be a public good. I don't feel any need to drop a coin in a busker's hat, either. The only person I've actually kicked the tin for is you. FKT
  11. Fah Kiew Tu

    Girl with patreon account goes sailing in hot place

    Give him LB's email address - rumour has it he has a lot of trashed sailboats.... FKT
  12. Fah Kiew Tu

    Another Interesting Home Built Steel Boat

    It's sad to see a lot of effort and time go into something that's going to be a complete failure at its intended task. I couldn't design a rowing boat and I know it; the fact that I've successfully designed & built other things isn't any sort of guarantee I could do the same with a boat. Thinking you can just 'wing' a sailboat without any knowledge of required structure, shape and in this case steel sections isn't a good thing, it's somewhere between overweening arrogance and idiocy. So yes, I do disapprove. I don't care a lot because I doubt the thing will ever actually get wet but it's a real shame to see that much effort wasted when buying a set of plans or studying basic boat design and *then* starting a build likely would have led to a successful result. Even a BS 36 would turn out better than this. FKT
  13. Fah Kiew Tu

    Another Interesting Home Built Steel Boat

    And it's going to look like a weak POS no matter what he does to it..... FKT
  14. Fah Kiew Tu

    E-nav on the cheap

    Define 'decent monitor'. I've got an Eyoyo 12" HDMI monitor plugged into one of my Pi's. It's natively 12V and comes with a VESA standard wall mount bracket. Also comes in 15" and 17" versions plus smaller ones. Frankly I'd rather have my Macbook Pro with its retina display screen but the power draw is probably more than 3X the Pi/12V screen combo. There are many, many ways to skin this cat, the way you choose depends on what you're trying to achieve WRT visibility, power, features, ability to 'roll your own' etc etc. I'm a semi-retired software person who spent a lot of time screwing with datalogging and display software on a big ship. I like playing with stuff. FKT
  15. Fah Kiew Tu

    E-nav on the cheap

    Vista! Do NOT remind me of Vista. After fighting with that POS operating system I ditched Windows forever and bought a Macbook running OS X. Say what you like about Apple and IOS but OS X is a pretty good and highly robust operating system with mostly clean unix under the GUI. I tried loading a linux distro up on the Vista laptop but got tired of it losing my wifi and screen settings every time I took it away from home, which was frequently. The OS X machine worked fine regardless. I'm not a great Apple fan, I used to despise the earlier versions of the operating system and I have nothing to do with IOS, but Macbook laptops running OS X work just fine. With Little Snitch installed to block outbound connections I haven't approved and a robust inbound firewall, I'm pretty happy. What amazes me is that people actually pay money for Windows 10 while knowing it has built-in spyware tattling home all the time. One of my friends runs it inside a black box virtual machine so it can't tattle. I've one of those cheap USB pucks for a GPS receiver and it works just fine. Load gpsd onto a Raspberry Pi, plug it in and done. Tell the chartplotter computer running OpenCPN what the IP address and port it's to get the GPS data from and it's working. As I said I like the Pi's - a Lantronix single port terminal server costs a lot more and does less. Daylight viz is an issue with all this consumer/domestic stuff, true. Happens I like playing with toys though so I don't really care. One plan is to just run a VNC client on a tablet anyway and leave the main plotter display below decks. FKT
  16. Fah Kiew Tu

    E-nav on the cheap

    Why don't you just turn all those 'services' off? I do. I have a smart phone, most of the time it's a dumb phone because I've switched the GPS, location tracking, wifi, bluetooth etc etc off. And funnily enough I don't get targeted advertising from Google. In fact I don't get *any* advertising from Google. Not that I like the big players, I don't have a Facebook account, but really - you can avoid a lot of that crap if you make even a modicum of effort. I use OS X and linux in various flavours for everything I can but life's too short to waste time putting linux on a tablet! FKT
  17. Fah Kiew Tu

    E-nav on the cheap

    I've got an add-on AIS receiver board for one of my Raspberry Pi's. Haven't set it up as yet, though. Got an older Pi 2 I'm going to use as a terminal server to convert the serial data from my echosounder to a tcp/ip data stream. I have wired ethernet via a USB powered hub as well as the native wifi on the 3B models. There are all sorts of tricks you can do with those cheap single board computers. FKT
  18. Fah Kiew Tu

    E-nav on the cheap

    OpenCPN on Macbook and also on a Raspberry Pi or 3 just because I like them. FKT
  19. Fah Kiew Tu

    Are Illegal Immigrants Also The People?

    It has a lot of benefits to others though. Often it shows you the people to avoid..... FKT
  20. Fah Kiew Tu

    Are Illegal Immigrants Also The People?

    Seems more than ever in the modern world, you have all the rights that you can enforce, and if you can't afford expensive lawyers, you have no rights at all. Staying off the radar is a lot better than 'winning' a fight to protect your rights. Not happy with this line of thought, but it's pragmatic. FKT
  21. Fah Kiew Tu

    Climate news

    This. I had some involvement in data analysis for Australia's ocean monitoring program. Instruments come with a calibration sheet and often an algorithm. You take the raw values, plug the calibration coefficients into the algorithm and out pops the magic number in SI units - hopefully. Now take an instrument that has been in the water for 12 months and you send it off to be re-calibrated. The numbers are different. Which set do you use, those for when it went into the water or those for after it came out? And where do you document this & other choices? When I designed one of our databases I kept *all* the metadata. We stored the raw data file off of the instrument, the calibration coefficients and the Java code used to calculate the engineering unit numbers - this last being what got made publicly available. This way if anyone challenged the data we could tell them the whole story and they could re-check it all for themselves. There was no 'secret squirrel' business by design. We had nothing to hide and if a mistake was found, we could re-calculate from original sources. FKT
  22. Fah Kiew Tu

    Girl with patreon account goes sailing in hot place

    Not sure what type of belt you have but the poly-vee ribbed belts can be obtained in a variety of widths and have less rolling resistance than V bents so pulleys can be smaller diameter. You get better power transmission. Of course you're also looking at a lot of re-engineering in your case including most likely pulling the shaft. For 100 watts it hardly seems worth the trouble. The fact that there's almost no output under 5.5 knots makes me think that the rolling resistance of the belt/alternator is basically preventing the prop from turning at all until the water pressure gets high. The fact that the belt disintegrates at 3 knots under engine power looks like confirmation. It'd be interesting to put a tachometer on the prop shaft to see what's happening. Maybe you could make a YouTube video of it - and include a bikini babe or 2..... FKT
  23. Fah Kiew Tu

    Girl with patreon account goes sailing in hot place

    Thanks for that reference. Unfortunately those engines have the conventional gearbox not the CPP gear. I want the CPP gear (g/box, thrust/cutless assembly, prop & the prop end stub of the prop shaft) more than I want the engine itself. FKT
  24. Fah Kiew Tu

    Girl with patreon account goes sailing in hot place

    I have a Sabb 18HP diesel with controllable pitch prop sitting in my workshop in search of the right hull to fit it to. Too small for my Witch hull (though Tom wouldn't have agreed with me I suspect). Even now if I could get my hands on the 30HP Sabb CPP setup I'd be tempted to fit the g/box and drive system. They aren't that complex at the prop end, the CPP g/box bit is a bit more so. I've also got a UK PNP-Duerr CPP sitting in the parts collection waiting for its turn on the work bench. Friend of mine has a Hundested CPP because he found it before I did. It's interesting looking at how different companies went about solving the same problem. I like interesting mechanical things. FKT
  25. Fah Kiew Tu

    Girl with patreon account goes sailing in hot place

    True and for long passages it may well be a good thing to do. I made provision when I put my hull together for a water generator. Since I have an Autostream prop to minimise drag I'm hardly going to use a shaft generator. Nor I suspect are most other people. A fixed prop driven by an electric generator may charge your batteries when turned by passage through the water, depends on the exact electrical setup. But it's going to cost you a knot or so in light air. I'd be interested in seeing real-world figures on charge rates to see how long it took to recharge the batteries. FKT