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#1
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Take another Ritalin Larry.
"Larry W4CSC" wrote in message ... DSK wrote in : 'How To Prepare A Boat For Transport By Truck' Aren't we s'posed ta SAIL the boat....not send it via FEDEX?? |
#2
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'How To Prepare A Boat For Transport By
Truck' Larry W4CSC wrote: Aren't we s'posed ta SAIL the boat....not send it via FEDEX?? Ideally, yes. Not everybody has the time... nor apparently the inclination... DSK |
#3
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"Jeff" wrote in message ... I've been thinking about this - since I did give the guy a rough time - So just how much acceleration is a "Panic Stop"? Did the mast have to be "encased in concrete" as he said? A Panic Stop is normally a deceleration. Even if the mast was secured on the boat rather than on the trailer, it shouldn't have shifted if secured well. I suspect it was tied to the bow pulpit and the stern pulpit with no provision to keep it from sliding forward (or backward) with a line similar to a spring line. The braking distance, according to http://www.ortrucking.org/stopping.htm from 65 MPH is 245 feet for cars, 454 for trucks, not counting reaction time. To decelerate at the force of gravity (one "G" or 32 feet per second squared), the stopping distance would be under 150 feet, so a truck is nowhere close to that. For a report on actual panic stop decelerations and other tests using police cars, see: http://www.nlectc.org/pdffiles/tirerprt.pdf Since the boat generally has a vertical force equal to one G, and the force of deceleration is somewhat less than that, then net force in a panic stop is similar to being at rest at a 30 degree incline, though stronger, maybe by 20 or 30%. (Even at one G, it would be only 40% stronger than being at a 45 degree incline.) Clearly, anything not tied down could slide around, but there is no reason for the mast to move, or even for the bracket to break. An other way of looking at this is that when the mast is hoisted, it will have a force on its axis easily double that of a "panic stop." Would a slippage of 2 feet be acceptable during that maneuver? Its pretty clear that the mast slippage was the fault of the preparation, not a panic stop. The bracket is a little harder to determine - It shouldn't break from a panic stop, but it could have been from normal bumps, or previous damage, or both. But again not the fault of the trucker. DSK wrote: sherwindu wrote: Recently shipped my sailboat from Florida to Racine Wisconsin using American Boat Transport. When boat arrived, mast on deck had shifted foward about 2 feet, although it was secured well in three places. Why was the mast "on deck?" It's standard practice... and much better... to secure the mast to the trailer. And if it shifted, then it obviously wasn't well secured. .... Driver says he noticed shift while driving down the highway. More like he had to do a panic stop. Everything inside the boat was tossed about. Hanging nets came down, etc. Only after the driver left Racine did I notice the outboard bracket was cracked, and luckily the engine did not fall off the boat. What??!?! You left an outboard motor hanging on a transom bracket for a 1000+ miles? You're lucky it didn't go through somebody's windshield. ... American Boat refuses to accept responsibility for this, or pay for a new bracket. And why should they? Sounds to me like the mess is 99.9% your own fault. ... There are many reputable boat transporters. I just picked a bad one. Nah, more like the trucking company picked a bad customer... Sherwin D. Are you sure your name isn't Crapton Neal? DSK |
#4
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Doug Dotson wrote:
"Jeff" wrote in message ... I've been thinking about this - since I did give the guy a rough time - So just how much acceleration is a "Panic Stop"? Did the mast have to be "encased in concrete" as he said? A Panic Stop is normally a deceleration. Yes, of course, in common usage. But in physics acceleration is any change in velocity (or momentum, if you want to be precise); the term "deceleration" implies a particular reference frame. .... |
#5
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"Jeff" wrote in message ... Doug Dotson wrote: "Jeff" wrote in message ... I've been thinking about this - since I did give the guy a rough time - So just how much acceleration is a "Panic Stop"? Did the mast have to be "encased in concrete" as he said? A Panic Stop is normally a deceleration. Yes, of course, in common usage. But in physics acceleration is any change in velocity (or momentum, if you want to be precise); Gimme a break... the term "deceleration" implies a particular reference frame. As this situation describes. |
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