http://blog.gmane.org/gmane.culture.transportation.humanpowered.boats hourly 1 1901-01-01T00:00+00:00 http://gmane.org/img/gmane-25t.png http://gmane.org http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6868 <pre>Ian The link line-wrapped in the email. I did not check it after it posted. Matt Johnson has quite a few on his V15-65 and his sailing/pedal cat here: http://www.youtube.com/user/svtolfea This one shows the stability while boarding from dock: http://www.youtube.com/watch?v=CGA49SxWXTM Rick Willoughby rickwill-bzGI/hKkdgQnC9Muvcwxkw&lt; at &gt;public.gmane.org </pre> Rick Willoughby 2012-04-23T10:41:46 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6867 <pre>Rick The link for my YouTube didn't work, try this one. http://www.youtube.com/watch?v=L8BaIr44zPg Otherwise type in the search V15-I_calm_Water. As we are all seperated by distance or continents this could be a good way of getting a look at everyones boats, post a clip of their boat in or out of the water. Ian </pre> Ian Cassell 2012-04-23T10:11:21 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6866 <pre>Mike Lampi has started posting some of his race clips to YouTube. There are 4 clips for the Jetty Island race he did this month. First shows him moving from dock: http://www.youtube.com/watch?v=1dlCe2m_Bp0&amp;feature=youtube_gdata Next shows some warm up near the start: http://www.youtube.com/watch?v=3uGCtH5TNo0&amp;feature=youtube_gdata Then the start - he is on the nearside of the course taking photos: http://www.youtube.com/watch?v=td5FOAUuk_E&amp;feature=youtube_gdata Then the finish - he comes in just before the 8 minute mark but camera has trouble focusing: http://www.youtube.com/watch?v=rMEZFycXD4Y&amp;feature=youtube_gdata Ian Cassell has also started to post to YouTube: http://www.youtube.com/watch? v=L8BaIr44zPg&amp;feature=BFa&amp;list=PLB6E11AD7AFB612CB Rick Willoughby rickwill-bzGI/hKkdgQnC9Muvcwxkw&lt; at &gt;public.gmane.org </pre> Rick Willoughby 2012-04-23T06:13:45 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6864 <pre>Hi All I have given up on pedaling in the recumbent position, bikes and boats, due to lower back pain which gets worse every time I try. As a result, I plan to sell my Yamaha Lakerunner. Does anyone have an idea what a Lakerunner, in good condition, is worth and also, where is a good place to advertise it? I put it on craigslist but I suspect the audience may be too small to attract the right buyer. Thank you in advance form a long time lurker. Take care </pre> Steve Smilanick 2012-04-11T20:46:37 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6863 <pre>I went out with Ian C yesterday to do some filming of his new boat at launch. It was windy with average of 25kts and gusts to 35kts so filming from my boat was bouncy. The results are posted on Youtube: http://www.youtube.com/watch?v=_nuBoCU8Ckc http://www.youtube.com/watch?v=74IzB1SMwxc Ian made some slight changes to the design and is using the in-line shaft arrangement with his 1:3.3 Involute made box with curved shaft all used on previous boat. The boat performed well and he was pleased with the way the wave piercing foredeck worked. Rick Willoughby rickwill-bzGI/hKkdgQnC9Muvcwxkw&lt; at &gt;public.gmane.org </pre> Rick Willoughby 2012-03-31T21:56:04 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6861 <pre>That boat of Matt's really flys, he really accelerated away fast. Wonder what speed he got up to. When he has used it a few times he should be ready to set a few records. The rudder caused a bit of turbulence but that is a minor problem. Hope his boat can stand up to the power he can put into it. Ian </pre> Ian Cassell 2012-03-22T11:00:56 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6860 <pre>Matt Johnson contacted me in August 2011 regarding a pedal boat design suited to his weight and power output. He finally got it on the water today and posted this video: http://youtu.be/IL5GBgJbS_4 Matt is the most powerful engine I have done a design for to date so it will be interesting to follow progress. He is aiming to join Mike Lampi in the Sound Rowers races when his time permits. The resulting hull design is based on my V15 series but optimised for 110kg displacement and 300W power. Hull ended up 6.5m long. Matt chose skin on frame as his method of construction along with a separate tubular frame and commercial recumbent seat that mounts to the basic boat. The drive is configured with side-mounted curved shaft spinning at 7X cadence. I provided a hub for folding prop and the second set of moulded CF blades for testing. The test was impressive but brief because the folding CF blades snapped when he accelerated for the second run. Rick Willoughby rickwill-bzGI/hKkdgQnC9Mu</pre> Rick Willoughby 2012-03-22T04:03:17 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6855 <pre>I can't see what boat you are referring to Dennis. -Tom </pre> Tom Christie 2012-03-17T17:09:14 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6854 <pre>I was wondering what ever happened with this boat. I saw pics of it quite awhile back and thought that it would make for a pretty quick boat as it was using a surf ski hull. It looks like it was moving right along in the video. </pre> dennis Barrett 2012-03-17T16:40:20 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6853 <pre>Clive Armitage has recently posted a video of his boat on operation. Can be viewed here: http://www.youtube.com/watch?v=Rdph3VOyPbU Rick Willoughby rickwill-bzGI/hKkdgQnC9Muvcwxkw&lt; at &gt;public.gmane.org </pre> Rick Willoughby 2012-03-17T01:51:40 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6850 <pre>Rick How much of a weight difference is there between the CF blades and steel ones? Do you provide a slot in the hub for the shaft or do you leave it blank. Being a nylon hub it wouldn't be hard to drill. Ian Ian The normal stainless blades weigh 70g. Remember this is quite a small prop. The CF blades currently have an aluminium core and weigh 20g. The core is needed for twist strength as I am only using unidirectional fibre lengthwise on the blade to resist bending. The next ones I mould will have a stainless steel strip for the core. This will add a bit of weight and should help deployment as well as stiffness against twisting. There is much less effort in making these blades compared with grinding stainless steel. I was surprised how easy it is to get a perfect blade from the mould. The mould cost a bit but it is well made and virtually guarantees a good result. The mould maker had not used CF for reinforcing before so it was an experiment for him as well. He has m</pre> Rick Willoughby 2012-03-08T08:34:35 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6849 <pre>Rick How much of a weight difference is there between the CF blades and steel ones? Do you provide a slot in the hub for the shaft or do you leave it blank. Being a nylon hub it wouldn't be hard to drill. Ian </pre> Ian Cassell 2012-03-08T07:55:04 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6848 <pre>I now have a mould for making CF folding blades: http://www.rickwill.bigpondhosting.com/CF_Prop_Blades.jpg The resulting propeller has a diameter of 330mm and weighs 160g. I have tested the blades to 16kph, which corresponds to 65N thrust. This is more than twice the thrust needed to achieve 12kph, which is the sustainable speed for a pilot in good shape. http://www.youtube.com/watch?v=ONk3fUnHamI The pitch was close to what I calculated below 12kph but it is possible there is some blade flexing due to loading because the pitch was apparently reducing as I increased speed. Usually the speed to cadence increases as speed increases due to reduced slip. The prop is suited to a gear ratio of between 6 to 8 depending on the boat and pilot although the boat needs to be easily driven. I was running at 7X. I could get 5kph in reverse spinning flat out. The blades do not deploy as quickly as heavier blades. I plan to use a stainless steel core to add some more weight and possibly reduce </pre> Rick Willoughby 2012-03-08T04:51:46 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6846 <pre>Ian Cassell was out on the lake with me on Saturday and took some video of my new boat: http://www.youtube.com/watch?v=RQs6YgO93RY&amp;feature=g- upl&amp;context=G2845651AUAAAAAAAAAA The video provides some observations of the ruder working, the trim of the boat and flow on the bow. Rick Willoughby </pre> Rick Willoughby 2012-01-15T05:31:32 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6845 <pre>Hi Rick At the electric boat race, a photo was taken from the rear of my boat &amp; I decided that the wake was excessive so modified the square stern to a point. This greatly reduced the wake but did not appear to improve the speed which is what you had predicted. Additionally I completed several tests on propeller tip shapes &amp; concluded that a simple HOEANER tip was a improvement over the radius ends that you have been using, additionally it is very simple to make. The tips were raked outwards at 30 degrees with a radius where the leading edge meets the tip. I also tried tiplets (look similar to winglets) &amp; found the performance similar to the rake tips but as these were tried on fully shaped propeller blades I dropped the idea due to the high amount of work required. Dennis </pre> Dennis 2012-01-14T21:52:52 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6844 <pre>Dennis Having spent considerable time now with both systems I agree the side mounted prop offers practical benefits and significant performance benefits over aft mounted. Even the offset thrust can be managed very easily by a bit of tweaking. There is also a less evident benefit if the prop is spun in the direction such that the prop torque offsets the weight of the gearbox. The boat trims out nicely. On the third time out I got over 20kph. I am now close to being power constrained rather than limited by footspeed and shaft compliance. The gear ratio is 1:7 enabling me to reduce prop pitch which lowers prop torque, hence the amount of wind-up in the shaft. The dynamics of this latest drive system will be hard to better. Did you do any boat modifications before last summer? That is a great looking boat with a very impressive performance. I am please to see that you have reverted back to the side drive bent shaft system. This type of drive, I feel is the most practical for laun</pre> Rick Willoughby 2012-01-13T21:05:06 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6843 <pre>That is a great looking boat with a very impressive performance. I am please to see that you have reverted back to the side drive bent shaft system. This type of drive, I feel is the most practical for launching and retrieving with out a trailer plus it can be serviced while still afloat. Dennis Adcock </pre> Dennis 2012-01-13T19:17:54 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6842 <pre>Hey Bob and Larry, That's better! It's great to hear ideas being batted around again. Some of us (I'm talking about myself here) never had much to add to the group but that doesn't mean we weren't interested in what the rest of you creative guys were thinking and doing. I hope it keeps going on. And on. Curt Curtis Chambers Owner/Pres. Nauticraft Corporation 5980 Grand Haven Rd. Norton Shores, MI 49441 231-798-8440 </pre> Curt Chambers 2012-01-03T16:15:13 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6836 <pre>Hello. Hello, out there. Is anybody there? Is anybody doing anything worth reporting? Or is my receiving faulty? I have not gotten anything for months (years?). Just for the record, Nauticraft is still here; we had a reasonably good year considering the economy and hope to have a better one here in 2012. Well, anyway, a Happy New Year to everyone! Curt Curtis Chambers Owner/Pres. Nauticraft Corporation 5980 Grand Haven Rd. Norton Shores, MI 49441 231-798-8440 </pre> Curt Chambers 2012-01-02T14:38:58 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6833 <pre>I completed a new boat in time for the Murray Marathon but family concerns prevented participation. I have posted some pictures here: http://www.rickwill.bigpondhosting.com/V15_58.htm I have only had the boat out a few times and have already got it going faster than any other. Top speed so far is 19kph and I expect I will get a bit more. I am still battling to get weight below 20kg. This one came out at 21.5kg. I will need to vacuum bag the hull to get lower. Best wishes to all for 2012. Rick Willoughby rickwill-bzGI/hKkdgQnC9Muvcwxkw&lt; at &gt;public.gmane.org </pre> Rick Willoughby 2012-01-01T11:03:20 http://comments.gmane.org/gmane.culture.transportation.humanpowered.boats/6831 <pre>Rick He was really flying in the V7, just leaned a bit too far the wrong way. Make sure no one puts it on funniest home videos! Ian </pre> Ian Cassell 2011-07-18T07:24:10 Search the mailing list at Gmane query http://search.gmane.org/?group=$group=gmane.culture.transportation.humanpowered.boats