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trackday

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About trackday

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  1. How does a Outremer 55 place the soles 18" below DWL? On a GB66 the max draft below DWL is 24". If the sole was 18" below DWL the bilge would only be 6". (not much room for tankage) and the sole width would only be 31".
  2. Hi Paul, the Honeywell systems can be purchased to work with N2K or analog systems. The beauty is you should only have to calibrate the sensor once including restepping the mast. No more string pot calibration or mechanical tiller sensor failure from, leaking, getting stepped upon or ripped off the deck. For a new project I am working on, I am planning of using these rotation sensors for rudder position and autopilot. The question is whether to head down the Madintec/ Mad Brain/ Bravo route or go with a FaRo sailing systems M.
  3. Depending upon your CPU and whether you need serial input or not, you owe yourself a visit to the Honeywell website to look at their non-contact position sensors. These are being used in many newer high end builds and once you see what they have to offer, the accuracy of these sensors, the reliability and the fact that you only calibrate once you may never look back at what the marine market has to offer for position sensors. Here is one option... https://sensing.honeywell.com/sensors/smart-position-sensors/arc
  4. For the marine environment, you would be wise to consider a TEWD (totally enclosed wash down) motor. Then you must consider how to displace the heat generated by the motor. Let's assume the motor is 93% efficient. That would result in about 350W of heat that needs to be displaced. However, that is probably a mute point if you only have a 100 Amp battery capacity. Running the motor at 5kW, you would have a maximum of 20 minutes of powering if you could run the batteries to 0 (which you cannot)
  5. My exposure to the boat was limited to taking a RIB out to it and getting to drive it with an experienced team of 3 crew in place. Your questions are best directed to specific people at the M&M office. PM me and I will supply you a email contact. Malcolm
  6. The boats you mention might be dry sailed but it has nothing to do with Nomex cores having issues with osmosis. If Nomex honeycomb is used in boats, it is generally with aramid fiber paper coated with phenolic resin. Perhaps you were thinking that the boats were using aluminum honeycomb? BTW, I have had the opportunity to sail on this boat and for the right team, the boat offers an excellent value and experience.
  7. So my assumption is that you are arguing that the performance benefits of Prepreg does not justify its additional material and handling costs for some sailboat designs but that you acknowledge that prepreg has higher performance when engineered for known safety factors and a sufficient level of quality control. If this is your argument then we agree. The same parameter applies to composite part that is cured in an autoclave; an auto-claved part is not necessarily a better part. However, a properly constructed part in lamina or laminate that is autoclaved will have improved mechanical
  8. Funniest line I have seen in a long time. If only I had known that all that science and engineering that goes into constructing those things that fly was just “guff”.
  9. 2:1!? By volume or weight? Carbon or glass? Most carbon race boats shoot for 35 +/- 1% resin by weight in a prepreg laminate. Are you suggesting that 15% more resin by weight in a carbon laminate is acceptable for a performance boat? Perhaps I am misunderstanding your statement.
  10. I am not sure the labor rate was $40/hr nor was the time to build each boat 54,000 hours. Here is a part of a snap-shot in time that I was supplied;
  11. Regardless of whether you choose Acrylic, glass or polycarbonate as your window material, you should comply with the rules for thickness calculations provided by ABS HSC or ISO/ CE. Failure to comply with the established rules for thickness places you at risk of a rejected insurance claim should a window failure occur. If you compete in a race where your vessel must be ABS or CE compliant, you could be prevented from racing if your windows do not meet the required S.F. Once you establish the required thickness for the material of your choice, you may calculate the weight deltas M
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