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About atnan

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  • Birthday 07/15/1984

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    Alameda, CA

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  1. atnan


    If it didn’t correct for boat speed and heading your “true” wind and apparent wind would be identical…
  2. atnan


    @JackdawIs there a way to configure masthead/wind sensor height on the Atlas 2? I would imagine that would be required to translate Atlas pitch/roll/yaw velocity into masthead velocity, so you can subtract that velocity vector from the data coming from the Calypso (or whatever) sensor. Or alternatively a calibration step where you measure wind speed with the boat still, then measure again with the boat being rocked side-to-side a handful of times. Relies on the true wind being steady, though.
  3. The Harken manual for your winch will tell you all you need to know. It's easy.
  4. One benefit of the 2.4mR as a platform, feasible for foiling or not, is that the sit-in form factor accommodates a wide range of physical abilities so even people with limited range of motion can get out and sail which is pretty cool. The guy who is behind this (Linked4Sailing) talks a bit about that on his website, so I suspect that was part of why it was chosen?
  5. Kickstarter trying to make a modified 2.4mR that can foil. All the photos / videos are of other foiling boats so I'm skeptical that they've achieved a proof of concept: https://www.kickstarter.com/projects/wahinelifestyle/gecko-the-sailboat-that-flies I've only sailed a Millimeter, but it's hard to imagine that style of hull shape being stable after removing the keel without some serious ballast in the foils, and with that ballast I'm not sure how you'd get up on the foils. Ignoring reality for a moment, a sit-in foiler would be pretty fun!
  6. Yep, exactly. One workaround I used on an Express 27 with an underweight crew was to do the usual wraps on the leeward winch but bring the tail to the high side with me so I can ease or trim from the high side using the windward winch. There's still a lot of side force the be mindful of, but the leeward wraps reduce it.
  7. This is bad advice IMO. The winch base is ultimately attached to the deck and applying force in shear. The form of the deck affects how much cross section that shear force is distributed in, and the size of the jib affects how much force there is. The angle of deflection off the leeward winch or turning block also affects the load, so if you're cross sheeting 90° that would be 141% factor. So, if you take a boat like a Santa Cruz 27 which has the primary winches located on narrow coamings not much wider than the winch base itself, cross sheeting a fully loaded #1 jib 90° could cause struc
  8. Here's a halyard purchase setup I've seen before. No need for knots in the halyard.
  9. I've also been eyeing this off. @SimonGH The description for the solar powered bluetooth-only version says "IPX8 protection grade (10 meters)", so it can be immersed. The spec sheet says "IP68" which means it's also dust-proof. None of the cabled ones can be immersed. The one thing I'm uncertain of and haven't found a good answer on is what the sample rate is like when used with products like the Sailmon Max or Vakaros Atlas 2. I believe it defaults to 1Hz but you can increase it to 8Hz...is this good enough for shift tracking? Is it good enough if repeated via NMEA 2000 to an autopi
  10. I count 4; through the block on the swivel up to boom (1), down to bottom block (2), up to top block (3), down to dead-end (4). But as ctutmark pointed out, it doesn't work because the fine tune moves with the gross tune rather than being anchored outside of it. Taking another look at it I think I might have a version that would work...
  11. Hmm, I think you're right that V1 is 4:1 / 16:1. And now I see the flaw in V2...as the gross tune is eased, the fine tune is also being effected and the two inner fine tune blocks would quickly collide. I can't think of a way to make this work with a single swivel.
  12. I'm building an ~18ft gin pole and I want to end up with something that can be broken down into at least two pieces for transport and storage without a trailer. I'm thinking two 9ft sections of 2.5" OD × 0.125" wall 6061 aluminium tubing, with a 1ft section of 2.25" OD × 0.125" wall tubing as a sleeve. I'd through-bolt the sleeve with 1/2" stainless hardware, and disassemble when the pole is not in use. Curious if there's anything I need to be mindful of with using a sleeve to join sections of tube that will be under compression.
  13. I'm planning to convert my main sheet setup so it's mounted on a centered swivel aft of the traveller, rather than moving with the traveller. This seems pretty straightforward, but I also have two other goals: Preserve the fine tune Consolidate my split backstay control lines into a single control line The obvious solution is to get a Harken "duocam" swivel base (HK-216), which supports replacing the top cleat with a double cleat (HK-412) giving me 3 cleats total. I figure with this setup I can have my main sheet fine and gross tune cleated to the top arm, and the backstay
  14. atnan


    Any idea if the initial release will just be numerical readouts for wind, or if there are plans to provide a richer "analog" windex-style readout similar to Raymarine i60 for quick glanceability?
  15. atnan


    On the product page it says: Then on the FAQ it says: Seems misleading for the product page to mention wind if the product doesn't support wind sensors. Is the plan to support something like the Calypso Ultrasonic Portable via Bluetooth, or just wired wind sensors? Any time frame?
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