From: <sildriel_at_ciateq.net.mx> > Hi Mike, > > I am afraid I disagree with your theory. > > I believe that precession is present, and assuming the gyroscope axis is > longitudinal to the kayak, and if a wake moves the bow upwards, then the > gyroscope will NOT FORCE A ROLL. I think it will force a left turn or right > turn only. Yes, but that would only add a stabilization effect for logitudinal motions, which is where a sea kayak is already the most stable. I assumed that they want to stabilize for for rolling, for which a kayak is least stable . > As I said, if you want to be stable with respect to leaning by side waves, then > the gyro should be horizontal but perpendicular to the kayak axis. Again the > effect of it, when a wave lifts one side would be to resist the lifting and to > turn the bow and/or kayak right or left. That is correct and Nick point out the same. I chose the vertical axis version initially because it is the easiest to fit into a kayak - perhaps under the seat. A horixontal axis will put a gyroscope wheel in a vertical plane and take up valuable room. Mike *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************
Keeping on with your thoughts, I think the vertical gyroscope has some interesting features as you pointed out. I can think of two instances, that could change momentum and force the gyroscope to preceed. 1.- If the boat is going out against waves and the bow is lifted or falls down in a trough, the effect of the gyroscope precession will be to roll the boat. That is to rotate around the boat axis. The roll tendency would be depending on the gyro rotation direction. That would be a strange situation. If you are surfing back and the stern is violently risen by a back coming wave, the boat will roll, due to the gyroscope and some bracing or leaning will be needed. How much? depends on the gyro characteristics. 2.- If the boat is rocked sideways by waves then the effect would be to react to the rocking and to sink the bow or stern. This would require a lot of gyro force to compensate for the buoyancy of the long boat. The vertical arrangements seems to be an interesting choice, if the rolling force due to bow to stern rocking can be controlled. I think the transversal horizontal arrangement has an added advantage. (BROACHING REDUCER). If you have a side wave and give the gyro the rotation in the proper direction, it will help you to avoid broaching. That is, if the boat is lIfted from a wave coming on the left side, and the boat turns right, then it will turn the tip from the wave, and the same happens if the lifting is on the rigth side then the turn will be to the left. If the gyro is turned in the opposite direction then it will be able to carve turns easier when leaning. It would be interesting to try to control the boat by leaning using the gyro assistance. Best Regards, Rafael. www.mayanseas.com Mensaje citado por: Michael Daly <michaeldaly_at_rogers.com>: > From: <sildriel_at_ciateq.net.mx> > > > Hi Mike, > > > > I am afraid I disagree with your theory. > > > > I believe that precession is present, and assuming the gyroscope axis > is > > longitudinal to the kayak, and if a wake moves the bow upwards, then > the > > gyroscope will NOT FORCE A ROLL. I think it will force a left turn or > right > > turn only. > > Yes, but that would only add a stabilization effect for logitudinal > motions, which is where a sea kayak is already the most stable. > I assumed that they want to stabilize for for rolling, for which a > kayak is least stable . > > > As I said, if you want to be stable with respect to leaning by side > waves, then > > the gyro should be horizontal but perpendicular to the kayak axis. > Again the > > effect of it, when a wave lifts one side would be to resist the > lifting and to > > turn the bow and/or kayak right or left. > > That is correct and Nick point out the same. I chose the vertical axis > version > initially because it is the easiest to fit into a kayak - perhaps under > the > seat. A horixontal axis will put a gyroscope wheel in a vertical plane > and > take up valuable room. > > Mike > > *************************************************************************** > PaddleWise Paddling Mailing List - Any opinions or suggestions > expressed > here are solely those of the writer(s). You must assume the entire > responsibility for reliance upon them. All postings copyright the > author. > Submissions: PaddleWise_at_PaddleWise.net > Subscriptions: PaddleWise-request_at_PaddleWise.net > Website: http://www.paddlewise.net/ > *************************************************************************** > -------------------------------------------------------------- Este e-mail fue enviado con el servicio IMP de : mail.ciateq.mx *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************
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