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Type: Posts; User: Clarkey

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  1. Replies
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    Re: Electric boost for a camping rowboat

    One conclusion I have come to over years of musing is that once a small boat has a sailing rig its needs immediately become dominant and render everything else a poor second. It is really...
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    Re: Sculling oar length

    The French seem to be at the vanguard of this kind of thing. I highly recommend a copy of this book and a hefty session with google translate if necessary. There is also a website...
  3. Thread: summer heat

    by Clarkey
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    Re: summer heat

    Yes, way off - seems to have been the victim of a graphic designer who wanted to line things up nicely.
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    Re: Vehicles Most Likely to Reach 200,000 Miles

    Prius was no surprise. I did 169000 miles in mine with the only failure a taillight bulb.
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    Re: Electric boost for a camping rowboat

    I notice that Blue Robotics have finally launched their new, larger, thruster after some covid related delays. The 'T500' is a 24V, 1000W ROV thruster that is also targetted at use in small craft. ...
  6. Re: Question for the Brits concerning Elizabeth Regina

    What makes you so sure she doesn't take the train?
  7. Re: Sleepable, luggable human-powered boats that can sail?

    I think this is fascinating design area. Have you looked at some of Matthew Layden's later boats such as Enigma and Elusion (and even Sand Flea)? They were built for inland/coastal waters and...
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    Re: cool Gyro-Copter video

    Do tractor autogyros like the sweet little Pitbull below suffer from the same 'powered push over' problems that can be an issue with pushers with high thrust lines?
    ...
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    Re: cool Gyro-Copter video

    Fascinating stuff, thank you.
  10. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    The latest Gartside collaboration is just delightful. I have always loved the way the Vivier Seil sits on the water and this seems that it may have a similar quality. Tremendous.
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    Re: Lee wants a new trimaran design...

    Sorry, I haven't been through the whole thread but has this one come up?

    https://cdn11.bigcommerce.com/s-n46z22rt03/product_images/uploaded_images/rigging-1.jpg
    ...
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    Re: Length of tug and barge cables

    It is while ago so my memory may be hazy (it was all centred around the aftermath of the Braer incident) but there was a move towards emergency towlines permanently stored in containers welded to the...
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    Re: Length of tug and barge cables

    The ones I was working on were for harbour and escort tugs rather than coastal towing so shock absorption was not really an issue. The low stretch was liked by skippers since it helped with precise...
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    Re: Length of tug and barge cables

    Yes, I was involved in the development of some of the first Dyneema towlines and they were a revelation. The low stretch Dyneema core had a polyester overbraid which protected them from abrasion and...
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    Re: RIP James Wharram

    Sad indeed but what a life.
  16. Re: BROTM Did the Boeing 737 Max 8 change the game this much?

    I doubt it, it is the product of a rotten engineering culture.
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    Re: Paddling outrigger canoe

    Once the canoe is moving forward the bow paddler will have less influence on the steering than the stern paddler because they will be seated closer to the pivot point.
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    Re: Paddling outrigger canoe

    Melanesia seems to have precious little freeboard with any more than 1 aboard. Lovely lines though.
  19. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    Now that things have taken a Mediterranean swing may be the BCA Demco catalogue is worth a look?

    http://www.bcademco.it/EN/piani.html#4

    http://www.bcademco.it/img/catalogo/rustica.jpg
  20. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    Sorry, yes I was unduly cryptic. You already have a link to it but I found it in the 'new designs' section which is worth a check from time to time.

    I do wonder what the outboard well will be...
  21. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    I notice that Selway Fisher have a new design that might fit the bill:



    LOA
    21'
    6.40m


    Beam
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    Re: Best Rock concert you have attended?

    The Who, Wembley Arena
    Man, Sheperds Bush Empire
    Isaac Guillory, Putney Half Moon
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    Re: Electric vehicles; why rear wheel drive?

    VW id3 and id4 are RWD (or AWD)
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    Re: Roger Barnes Latest Videos

    I lived near Venice for a number of years and spent many happy days rowing around the places he visited. I think his video captured the wonderful atmosphere of the place very well, especially...
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    Re: birdlike aircraft

    Fortuitous angle though - the plan view is completely different.
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    Re: birdlike aircraft

    https://upload.wikimedia.org/wikipedia/commons/b/b2/Rumpler_Taube_monoplane.jpg
  27. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    You are particularly good at mounting stuff so I suspect you will come up with a more elegant solution to what I am about to suggest...

    Electric outboards won't mind if they are upside down so I...
  28. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    I don't know why but I really like the whipstaff steering on Wayward.

    I suspect that a lightweight electric outboard mounted on a more conventional, narrower, transom would be a much simpler and...
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    Re: Lessons learned from Shellback capsize

    It always shocks me how many venerated boats are, in my opinion, poor and incomplete designs with almost no thought given to capsize behaviour and self rescue.
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    Re: Capsize test ocean rowboat

    If you use the icon that looks like movie film you can show it directly. Pretty boat but that self righting ability looks quite marginal even with those fenders lashed to the cabin roof. Might be...
  31. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    Yes, I have read in a few places that the flexible panels really suffer with heat when stuck to surfaces (apart from maybe the 'CIGS' panels which seem more resistant to it).
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    Re: My ridiculously small trimaran

    Looks like a fun boat. You might enjoy looking at some of the varied thinking in the Italian 'Diecipiedi' ('10 foot') class, they have been exploring similar ideas for a few years now with mono,...
  33. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    I wonder if this, scaled up (well, pretty much double in size), with a cute wheelhouse/cuddy could look decent? I am having weird thoughts of cuddy/cabin structure where solar panels form the roof...
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    Re: Sculling Fun in France

    Here is an example of a K1 sprint over 200m. The winning speed was 11.1 knots (from a standing start)


    https://www.youtube.com/watch?v=5U8IvUUpEWc
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    Re: Sculling Fun in France

    That's pretty good - the world record K1 sprint over 200m is 11.3 knots.
  36. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    I always thought the UK was one of the more conservative places as far as workboat design was concerned but I have been surprised how quickly catamarans, both displacement and planing have become...
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    Re: Sculling Fun in France

    Yes,while congratulating yourself on your core strength improvement!

    I have been looking at some articles on these boats via the miracle of Google Translate and they are claiming some pretty...
  38. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    Would look even better with the stern pulled in a bit to suit a smaller, lighter motor and lower cruising speeds.
  39. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    Regarding weight of the drivetrain things have moved on quite a bit in the last few years, especially as far as batteries are concerned

    The requirement is that the boat is optimised for the 2-6hp...
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    Sculling Fun in France

    This looks like great fun...


    https://www.youtube.com/watch?v=cwuSiQIQ8H0
  41. Thread: U K: Roll Call

    by Clarkey
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    Re: U K: Roll Call

    Only empty petrol stations or huge queues here in west London for the last week. Makes me glad we went for a plug-in hybrid a couple of years ago.
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    Re: I like bicycles.

    Sounds like you are after some 'Powergrips'. I tried a pair once and they seemed OK.

    96033
  43. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    Given the required optimisation for low speed there might be some merit in looking at small cruiser/launch designs for speed restricted waterways like the Thames and the Broads?

    A suggestion from...
  44. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    Me too, I just can't really consider the idea of burning fossil fuel for recreation anymore. I would be happy to commit to a set of plans.
  45. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    I'm inclined to agree. Although it is interesting to speculate what characteristics of existing designs might be adapted to this brief the reality is that this is an exciting new cruising type and it...
  46. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    Michael Storer has some background in solar electric boats - his 23 footer could provide some food for thought? The flat bottom might not be what quite what you are looking for but Michael does put...
  47. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    I suppose 'scaled up rowing designs' might hint at something like a St Ayles Skiff as a basis? Probably lacking a bit of primary stability bit that might be compensated for by using the battery bank...
  48. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    I have always rather liked this Selway Fisher Yamato boat at just under 24'. Designed for a 9hp diesel I imagine that the engine box could easily be used to house batteries and an outboard put on...
  49. Re: Displacement designs for solar electric river cruiser, 20 - 25 feet

    I have to agree, I don't think there is single multihull aesthetic that I am fully on board with apart from maybe some Newick wing ama trimarans and a few Woody Brown and Joe Quigg cats.
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    Re: Electric propulsion design guide

    I think we have reached a pretty exciting stage for electric motor systems for small boats. There seems to be a coming together of capable motor, battery and solar tech at reasonable prices.

    The...
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