J24 (Sail No. 4239) Dartmouth |
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List classes of boat for sale |
Protrim speed indicator |
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Femto
Groupie Joined: 11 Jun 05 Location: United Kingdom Online Status: Offline Posts: 47 |
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Topic: Protrim speed indicator Posted: 11 Jun 05 at 3:28pm |
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Strange you should mention that- I brought it!! Great fun toy, but still no substitute for boat-on-boat paractise. As to drag, the impellor is pretty small and hydrodynamic. |
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RS600 717, RS400 870 Netley SC
Kerr 11.3 (Pier View YC) |
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Guest
Newbie Joined: 21 May 04 Location: United Kingdom Online Status: Offline Posts: 0 |
Post Options Quote Reply Posted: 13 Jun 05 at 1:31pm | |
Small world on-line You'll be able to answer the question about if it's any good then as I never got round to using it ... Looks like a good gadget; the function that showed how long it took to recover speed after a tack looked pretty handy ... regards, Rick
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14niner
Newbie Joined: 17 Mar 05 Online Status: Offline Posts: 19 |
Post Options Quote Reply Posted: 15 Jun 05 at 10:34am | |
If anybody has one of these to sell please PM me! Chees |
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lozza
Far too distracted from work Joined: 23 Sep 04 Online Status: Offline Posts: 262 |
Post Options Quote Reply Posted: 15 Jun 05 at 11:30am | |
Oi! Wait your turn
Only kidding , but i did ask first! |
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Life's a reach, then you gybe
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14niner
Newbie Joined: 17 Mar 05 Online Status: Offline Posts: 19 |
Post Options Quote Reply Posted: 15 Jun 05 at 4:56pm | |
Contact SSailor for payment too . He will not mind! |
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14niner
Newbie Joined: 17 Mar 05 Online Status: Offline Posts: 19 |
Post Options Quote Reply Posted: 15 Jun 05 at 5:01pm | |
What do you sail? Have a look on ebay for GPS fitness watches, the type that tell fat people how far they havent run. Less drag, and THESE WILL BE AGAINST ALMOST EVERY CLASSES RULES!!! But if its a watch they will never know http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category =14946&item=5781185605&rd=1http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category =75230&item=7162872575&rd=1 http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category =75230&item=7160823474&rd=1 Apparently they tell the time aswell.
This will not help you pull though :| Edited by 14niner |
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alex650
Newbie Joined: 15 Jun 05 Location: United Kingdom Online Status: Offline Posts: 2 |
Post Options Quote Reply Posted: 15 Jun 05 at 5:39pm | |
Stefan, All you need is 2) An NMEA output from a yachts' log and GPS etc 3) Some polar generation software like http://aquilon-performance.com/ - £200 (300 Euros) This software will firstly get all your polars organised (assisting with performance analysis between sails and settings) - and also, when racing, allow you to work out how you are doing against the polars. The software outputs 2 figures - one a "live" percentage (however very impacted by waves and micro changes in apparent wind direction / speed) - and a rolling percentage calculated over the last 60 seconds (used for tuning) If you are not allowed computers on board while racing, you can just take the paper printout of the polars formed while training... and this is still helpful. (This software is used on a number of UK solo offshore boats - including Sam Davies on her Figaro) You can also use the polars to assist with navigation routing - as they can help deduce downwind gybing angles - and for decisions about which side to pass islands etc.... I admit this may not be too helpful for dinghies though! (although you can always analyse a race - and work through all the options - and base your on the water decisions from the previous analysis) Alex |
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lozza
Far too distracted from work Joined: 23 Sep 04 Online Status: Offline Posts: 262 |
Post Options Quote Reply Posted: 16 Jun 05 at 8:50am | |
I sail a 505 and an RS300, If the garmin GPS are so good, why are you interested in the protrim? Also, the idea is not to race with the speedo, just train and improve tacking/gybing techniqus.
Edited by lozza |
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Life's a reach, then you gybe
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14niner
Newbie Joined: 17 Mar 05 Online Status: Offline Posts: 19 |
Post Options Quote Reply Posted: 18 Jun 05 at 9:36am | |
Didnt say they where so good did I? Just pointing out an alternative. |
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