TruSail: training analytics

   Epoxy a tube with a marble inside it to the thwart.  And then keep the marble in the middle...

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giraffe Send Private Message Find Member's Posts Posting king Joined: 10 May 07 Online Status: Offline Posts: 148	Post Options Post Reply Quote giraffe Report Post Quote Reply Topic: TruSail: training analytics Posted: 07 Jan 19 at 9:28pm
	Epoxy a tube with a marble inside it to the thwart. And then keep the marble in the middle...

Sam.Spoons Send Private Message Find Member's Posts Really should get out more Joined: 07 Mar 12 Location: Manchester UK Online Status: Offline Posts: 3400	Post Options Post Reply Quote Sam.Spoons Report Post Quote Reply Posted: 07 Jan 19 at 8:41pm
	a pendulum inclinometer and a couple of magnetic reed switches would do that
	Spice 346 "Flat Broke" Blaze 671 "supersonic soap dish"

davidyacht Send Private Message Find Member's Posts Really should get out more Joined: 29 Mar 05 Online Status: Offline Posts: 1345	Post Options Post Reply Quote davidyacht Report Post Quote Reply Posted: 07 Jan 19 at 8:04pm
	Would love a simple training device that pinged at you when you heel more than a given range from upright
	Happily living in the past

Guests Send Private Message Find Member's Posts Guest Group	Post Options Post Reply Quote Guests Quote Reply Posted: 07 Jan 19 at 7:30pm
	Heel and pitch (trim) are relatively easy, just a calibrated IMU. Tiller angle needs a magnetometer on the tiller and one on the boat, and synchronising between them. So more cost and hassle, but would be cool to see results. See for examplethis video (how do you post YouTube vids here?)

Guests Send Private Message Find Member's Posts Guest Group	Post Options Post Reply Quote Guests Quote Reply Posted: 07 Jan 19 at 7:01pm
	I just wish I had the smarts to put such a system together! I think heel is the number one thing Id like to get. You can get it with RaceQs app, but the GPS is rubbish on my phone, so the track doesn't end up that use able. Plus, for training I'd like a display on board, that you could see. Next I'd like tiller angle. Then all the GPS fine detail speed and acceleration. I think the last priority would be sheet angles and leech tension.

Guests Send Private Message Find Member's Posts Guest Group	Post Options Post Reply Quote Guests Quote Reply Posted: 07 Jan 19 at 4:59pm
	I made a system about 5 years ago for a work application but used it for sailing too. Could log locally and also Bluetooth to a coach boat pitch, roll and heading and GPS location and speed. Was really interesting to analyse the data. Based on one of these (about £300) plus a GPS unit. these AHRS Adding in tiller angles, boom angles and leech tensions would be really great, but a pain to set up I expect.

Guests Send Private Message Find Member's Posts Guest Group	Post Options Post Reply Quote Guests Quote Reply Posted: 07 Jan 19 at 4:39pm
	Seems a very decent unit... more for sailing associations, pro-coaches and pro-sailors at the it's price-point. A lot of the analytics will have been used in racing yachts for long time, with many being used right down to amateur weekend warriors (except sail loading?). But, these things are very hard to measure on a dinghy where you need a light weight and small unit. There's very little in the way on usable data for the average sailor. GPS overlay will give you rough speed and where you went, but no where near the resolution to give you decent feedback on a tuning run, which you'd have to do solely on perception. Nearest thing you can get is a action camera to review, but it's not analytical. Power-meters in cycling became a massive thing, even with non-racers over the last 5 years. Could you see the same thing happening with units like these? For heel, sheeting angles, tiller angle, leech loading and 1/10th second resolution GPS positional data I'd probably pay 500-1000£. My valuation is probably an order of magnitude off affording this system for now How much would you pay? Edited by mozzy - 07 Jan 19 at 4:45pm