tag:blogger.com,1999:blog-6466695305125791022.post6726135864348851082..comments2024-03-13T08:16:23.560-07:00Comments on Indigenous Boats: Burmese Long-TailsBob Holtzmanhttp://www.blogger.com/profile/05878339327766256094noreply@blogger.comBlogger13125tag:blogger.com,1999:blog-6466695305125791022.post-5314550934257931622021-11-13T03:59:08.500-08:002021-11-13T03:59:08.500-08:00Hi Jesse
The video is no longer available
But, i...Hi Jesse<br /><br />The video is no longer available<br /><br />But, if you talk about a black paste for the joints ... here in Peru a substance called pitch is used. It is a by-product derived from petroleum (a tar)<br /><br />This product is used by heating it in a container so that it becomes a workable paste (If you want to give it plasticity, you can add recycled motor oil or diesel2 even gasoline ... be careful with fires). Be careful with burns.<br /><br />Prior to applying the layer, a jute fiber, or cotton cloth, or a "manila rope", or coconut fiber, or strips of cotton cloth is inserted between the wooden plates .... The purpose is to give consistency to the breaking of the pitch when it cools.<br /><br />there is also a natural resin in the Amazon rainforest called "copal". You have to gather enough for a job ... This would replace the tar. Although, this resin being a natural aromatic, today it is used to produce incense making it even more expensive and complicated to obtain. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6466695305125791022.post-9347011319570722162018-03-30T05:13:03.363-07:002018-03-30T05:13:03.363-07:00Jesse,thanks for this link. That's a beautiful...Jesse,thanks for this link. That's a beautiful boat being built in the video. I don't know about the seam compound (perhaps roofing tar with something granular added to it?), but maybe some other readers can add their insight.Bob Holtzmanhttps://www.blogger.com/profile/05878339327766256094noreply@blogger.comtag:blogger.com,1999:blog-6466695305125791022.post-17517483308148663852018-03-29T19:21:32.622-07:002018-03-29T19:21:32.622-07:00Hello,
I saw a great youtube video about these lo...Hello,<br /><br />I saw a great youtube video about these longtail boats. Here is the link:<br /><br />https://youtu.be/_9oJErubzfY<br /><br />My question is what is the black chunky paste they use to seal the seams? Some commenters alluded to a mix of coconut husks, diesel and old tire rubber but I cannot confirm these claims. I'm very interested in a recipe if anyone has it.<br /><br />Thanks for the great blog.<br />-JesseAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6466695305125791022.post-64512689391079516172016-05-04T04:51:31.685-07:002016-05-04T04:51:31.685-07:00Hi I just got back from Phuket and on all the lont...Hi I just got back from Phuket and on all the lontail boats, here was a pipe mounted on top of drive shaft tube that ends facing inti the top of prop drive. I guess that this is used for the purpose of inducting air into the prop drive area in the water of prop drive to inhibit the pitting of the prop as per Bournell's law of water pitting blade. I failed to find anthing pertaining to this on the web so far. Anonymoushttps://www.blogger.com/profile/03006308047156161650noreply@blogger.comtag:blogger.com,1999:blog-6466695305125791022.post-91275206760517515382016-02-21T02:45:53.074-08:002016-02-21T02:45:53.074-08:00As regards the thai system, it has an advantage, a...As regards the thai system, it has an advantage, and not a drawback, in having a long shaft: the propeller goes into the water into the surging wake of the boat, while other systems can find water well below. The difference is easily 15cm, and compensate for the worse angle. Remark also that long tails designed for canals or rivers have a very low stern, less than 30cm, and with the use of the wake the angle of entry is practcally flat. Highly placed engines are there mostly for coastal useJMDeplaixhttp://aftm.free.frnoreply@blogger.comtag:blogger.com,1999:blog-6466695305125791022.post-56435725755880206862014-12-18T14:46:05.533-08:002014-12-18T14:46:05.533-08:00Brian: In the third photo, it looks like the upper...Brian: In the third photo, it looks like the upper tube faces forward at its aft end, and the lower tube faces aft, and that both of them have hoses on their front ends that lead to the engine. I'm not sure, but guess is that the upper tube is cooling water intake, and lower tube is cooling water exhaust. Bob Holtzmanhttps://www.blogger.com/profile/05878339327766256094noreply@blogger.comtag:blogger.com,1999:blog-6466695305125791022.post-3058765664797553222014-12-18T14:32:57.156-08:002014-12-18T14:32:57.156-08:00Hi my name is Brian, just back in the UK from Myan...Hi my name is Brian, just back in the UK from Myanmar and a few days on Inle Lake. I am curious to know the function of the twin tubes in an H shape on the top of every longtail mechanism I saw, regardless of age, tourist or working boat. Must say we enjoyed barrelling along as tourists on the open water, and also just chugging through the villages.<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6466695305125791022.post-40256962091215250912013-10-11T05:05:47.999-07:002013-10-11T05:05:47.999-07:00Hi Ronald. From the photos, it does appear that th...Hi Ronald. From the photos, it does appear that the primary output shaft passes through a stern tube. This seems to be fairly high on the transom, and it looks like the universal joint is above the waterline, although this could change if the boat were heavy-laden. I don't know about lubrication of the universal, but I wouldn't be surprised if they just slap a handful of wheel bearing grease on it every now and then.<br />I also don't know whether the Burmese or Thai system is more efficient overall. In favor of the Burmese method is the straighter shaft angle and the more centered placement of the engine's weight which would lend toward better hull trim. On the Thai side is the absence of an energy-robbing universal joint. I don't know which of these factors would be greater. (On the Burmese boats, however, it looks like the final drive shaft and the primary output shaft would be in fairly straight alignment when the boat is traveling straight ahead, so the universal wouldn't rob much power under those circumstances.)Bob Holtzmanhttps://www.blogger.com/profile/05878339327766256094noreply@blogger.comtag:blogger.com,1999:blog-6466695305125791022.post-21469339839878831592013-10-10T04:00:34.392-07:002013-10-10T04:00:34.392-07:00Hi, my name is Ronald, I am a marine engineer and ...Hi, my name is Ronald, I am a marine engineer and I work on container ships. I am intrigued by the shaft mechanism on the Burmese boats. I assume that the shaft from the engine protrudes from the stern through a "stern tube", and from there a universal joint connects another shaft which bears the rudder and propeller assembly? Does this mean that the universal joint is immersed in seawater, and is not lubricated? Also, how do you know that the Burmese solution is more efficient, since it uses a universal joint in the shafting system while the Thai long-tail does not?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6466695305125791022.post-31574761170489532862013-05-09T06:06:20.108-07:002013-05-09T06:06:20.108-07:00Even though the above comment is spam (it's fr...Even though the above comment is spam (it's from an Indian brokerage that specializes in ultra-high-end yachts, and the commenter's intention is clearly just to get a link on this blog -- too bad for him), it did cause me to do a little Googling, and I found: 1) this superb article on how to build your own longtail: http://longtailboats.webs.com/apps/blog/entries/show/5452276-the-long-tail-motor,<br />and 2) the interesting fact that longtail engines are commercially available in the U.S.. Here are a couple suppliers: http://www.mudbuddy.com/opencart/index.php?route=common/home<br />http://www.explorebeavertail.com/mudmotors.htmlBob Holtzmanhttps://www.blogger.com/profile/05878339327766256094noreply@blogger.comtag:blogger.com,1999:blog-6466695305125791022.post-1334225332992140042013-05-09T05:38:43.527-07:002013-05-09T05:38:43.527-07:00Dear Paul,
its an interesting read, would you kno...Dear Paul,<br /><br />its an interesting read, would you know anyone who knows from where to buy these engines and propulsion system used on burmese long tail boats.<br /><br />would request for your help.<br /><br />regards,<br />Jitendra Rami<br />rami@westcoastmarine.co.in <br />+919820369980<br />Mumbai, IndiaAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6466695305125791022.post-42674667643787819952012-11-13T15:20:44.011-08:002012-11-13T15:20:44.011-08:00Gav,
I believe they're not doing this for the ...Gav,<br />I believe they're not doing this for the tourists: it's just the way they fish. I really don't know how they'd react to a "tip," but I'm picturing how a Gloucester or New Bedford (Massachusetts) fisherman would react if you too a picture of them working and then offered them a tip. A beer? Maybe. But I think they'd be offended by any implication that they're "scenic".Bob Holtzmanhttps://www.blogger.com/profile/05878339327766256094noreply@blogger.comtag:blogger.com,1999:blog-6466695305125791022.post-7068490326443713852012-11-13T12:46:37.051-08:002012-11-13T12:46:37.051-08:00The leg rowing thing is remarkable. I trust the to...The leg rowing thing is remarkable. I trust the tourists give them something for their performances!Gavin Atkinhttp://intheboatshed.netnoreply@blogger.com