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About leong

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    Paddle Upwind

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  • Gender Male
  • Interests Kayak racing, fishing and touring; road bike racing and touring; ski touring; swimming and fitness workouts.

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  • First Name Leon
  • Last Name Granowitz
  1. I never paddle solo without my VHF radio. I believe that a VHF radio is the single most important thing you should carry in/on you PFD. 
  2. Dreaming of moving water...

    $20/year + $5 once for the title.
  3. Dreaming of moving water...

    It’s a different world down here in Florida. I needed a name for registering the kayak so the official name on the title is Mr. Q. I chose that name because it’s my QCC700X kayak. I call my Epic 18X Mr. Ugly because it's one of the homeliest kayaks. -Leon PS Florida wouldn’t accept my bill of sale before issuing a title for Mr. Q.  So I had to get the QCC factory (a division of Wenonah Canoe) to issue a retroactive "Builder’s Certificate".
  4. Dreaming of moving water...

    Not just France. From Florida Boating Laws: Is a non-powered vessel required to be registered and titled? If the non-motor powered vessel is less than 16 feet in length, it is not required to be registered or titled. However, if the vessel is 16 feet or more in length, it is required to be registered and titled. Accordingly, my 18-foot sea kayak is registered and titled in Florida. -Leon
  5. Dreaming of moving water...

    And I prefer paddling sports where you can paddle back to the put-in. -Leon
  6. Not the best kayak camping trip

    The sight of us on the water and this very website has some educational value to those who look. But how do you educate the media to know the difference between a guy walking up a hill and a mountaineer, oops, I meant a pretend kayaker and a sea kayaker? -Leon
  7. Not the best kayak camping trip

    Andy, I'm with you 100%. This is one of my screams. There are sea kayaks, recreational kayaks, floating bathtubs, floating mattresses and floating you-know-whats. Unfortunately, the uniformed media lumps them all together and calls them kayaks. It not only gives us sea kayakers a bad name but it has the potential for introducing bad laws. Unfortunately, there is no unique nomenclature to distinguish sea kayaks and sea kayakers from the rest of those floating vessels. Calling a person that paddles around on an air mattress a kayaker is annoying as hell. It’s analogous to calling a person who walks up a hill a mountaineer. -Leon
  8. Best seal launch I have seen.

    Amazing, I wonder who shot the video? Perhaps it was a Sherpa on a hang glider. Those Sherpa climbers can do anything. I heard that one of them carried a European climber up to the peak of Mount Everest. Just wonderin’ Leon
  9. Dreaming of France...

    Didja all notice that in Andy’s video (at ~ 1:23) Jason fails several combat rolls in a row. Pierre is duteously on station waiting to perform a bow rescue. But Jason finally succeeds and yells out bonjour la bonjour. Obviously, Andy would have come up on the first roll attempt and Pierre wouldn’t be needed. -Leon
  10. Dreaming of France...

    You're gettin' soft Andy. When the conditions are just right there it looks like this. -Leon
  11.   Here's the Navy report. Wow, this report leaves out more than it says. Assuming one RCB was dead in the water why didn’t the other one initiate a tow? Wouldn’t these sailors know their location (surely they do have GPS’s and other navigational equipment)! Why did they stray from the planned course? Who fixed the mechanical problems so that could leave Farsi Island? Did the sailors see the Iranians removing the SIM cards? Did they see any other equipment tampered with? Why didn’t the Navy ask these questions when the rescued sailors were aboard the cruiser and aircraft carrier? The whole story is full of holes. I have no idea of what happened but I can smell the coming conspiracy theories. Just wonderin’ -Leon
  12. Disregarding stroke form, your maximum power (maximum work per unit time that you can perform) is the key measure of how fast you can paddle. That is, it isn’t how strong you are that decides how fast you can paddle; it’s how much power you can put out. And, like an automobile engine, your potential power maximizes at a particular cadence. On a bicycle you can control your cadence using the variable gear ratios. Although you don’t have variable gears on a kayak you have some control of your cadence by using different length paddles. Here’s a good experiment: Think of riding a bicycle up a steep hill as fast as you can. It’s obvious that muscles can shorten faster against light loads than they can against heavy loads. So try riding up the hill in your highest gear. If the gear ratio is high enough, your muscles will be working against a load that is so high that they can’t shorten. Of course, the static force produced by your muscles will be as high as they can possibly be. But, since there is no muscle movement (i.e. you pedal cadence is 0), the power that your muscles are producing is 0, since power is the product of force and speed of contraction. Now shift into lower and lower gear ratios. When the gear ration is low enough, your pedals will be spinning so fast that the force against them will go to 0; i.e. you can’t push against something that is moving faster than the maximum speed that your muscles can shorten. At this very low gear ratio your power will also be 0. So here we have 0 power at 0 cadence (a high gear ration) and 0 power again at very high cadence (a low gear ratio). That means, that some where in-between (along the power vs. cadence curve) there must be some cadence where power is maximized. It cannot be any other way. For those of you with some math background, Rolle’s Theorem proves that this is true. As an aside, if we divide each value of power by its corresponding force along the power vs. cadence curve the result is the famous Hill’s equation that relates force to speed of muscle contraction. So, in one sense, Hill’s Equation is obvious from simple Newtonian physics; i.e. it doesn’t require delving into biophysics. Now look at this video of the team of Greg Barton and Oscar Chalupsky having a tug-of-war against a guy using a kayak with the Mirage Pedal drive. You can see that because Greg and Oscar are going so slow their cadence is extremely low. As argued above, although these two world class paddlers are producing a very large static force, the power they’re generating is very low because their cadence is low. On the other hand, the Mirage drive has a low effective gear ratio. The result is a high cadence (watch the video to see the very fast leg movement). And that’s the end of the story. We demonstrated how Hill’s Equation of muscle contraction is almost obvious and why Greg Barton (a Mechanical Engineer) and Oscar should never have agreed to this unfair contest. -Leon PS My two neighbors (both fairly powerful) have this Hobie tandem kayak with Mirage Drive. Except for the first yard or two of sprint races against the two of them I can paddle my sea kayak at about a 50% faster speed than their Hobie.
  13. Forum Upgrade

    Ditto from me.
  14. Forum Upgrade

    Not too significant, but unless I'm mistaken: There doesn't seem to be a "preview" button now? The little "Share this Post" thingie on the top right doesn't show the post number now? There doesn't seem to be a list of people reading the threads now? -Leon
  15. Hmm, it’s hard to figure out how two U.S. Navy boats got lost in Iranian waters. Maybe the guys couldn’t, but you’d think that at least the young lady would know how to navigate. If need be, I’ll donate my little handheld GPS and a deck compass. Anyone else? I also recommend that the sailors study John’s book as a backup for those "mechanical problems". Just sayin’ -Leon PS Pouring rain and lightening now in south FLA