Heliostat Tracking Idea Gearing
) So we see the output Force is essentially equal to the input Force times the ratio of the distances. Note that the output Force is inversely ...
SmartTrack – a smarter rudder?
It’s likely like no one will be changing their minds. Once a Scientologist, always a Scientologist, I guess.
There are those who decry rudders as a crutch, sometime used by weak paddlers who don’t know how to paddle. People who use rudders see them as a tool for allowing a paddler to save energy in bad conditions. Rudders have some weaknesses, and SmartTrack wanted to fix the defects one by one.
Weakness One: FootbracesMost rudders use a cabling system that runs a single cable from each footbrace to a side of the rudder bracket. That works, but there are down sides. The cables will stretch, providing a spongy contact point, and the cable swaging (the thing that makes the loop at the end) can fail, leaving you without a rudder and without a footbrace. Bad news.
The SmartTrack system has two cables, but it terminates in the side rail, not the foot pedal. This eliminates the need for the cable to provide support for the footbrace, which doesn’t depend on the cable for tension. In other words, your point of contact is fixed and solid, not suspended from a 12-foot spring (a stainless steel cable still stretches quite a bit). The swaging is mechanical, but easily adjusted without tools using the Cool Rudder Wedgie (see diagram). This makes field servicing a LOT easier (and with simple tools, like a multi-tool that every kayaker should carry anyway), and carrying a spare cable is now actually worthwhile.
The footbraces on the SmartTrack system use a two-part pedal – one part that controls the rudder (with their toes) and one part to brace against with the ball of their foot. This is superior for many reasons, mostly because the footbraces stay solid, making paddling more effective.
Weakness Two: WindageA rudder blade hanging out on the deck isn’t the prettiest thing in the world. In fact, it’s sorta ugly. Standed over-the-hull rudders must swing 270 degrees to stow on the deck because of the location of the pivot point. This rudder must also be long to have enough surface area in the water to be effective. In addition, the rudder blade must sit on a chock on the rear deck to provide a semi-secure footbracing. Because the SmartTrack footbraces don’t need a rudder to provide a secure footbrace, the need to swivel the rudder back over the deck is eliminated.
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Diagram 1 - A basic equation for a pulley: In equilibrium, the force ... Diagram 2a - Another simple pulley system similar to diagram 2, but in which the lifting ...
Diagram 1 - A basic equation for a pulley: In equilibrium, the force ... Diagram 2a - Another simple pulley system similar to diagram 2, but in which the lifting ...
Free-Body Force Diagams * The purpose of a free-body force diagram is to assist you in ... by a cord passing through a frictionless pulley to a hanging weight. ...
Diagram 1 - A basic equation for a pulley: In equilibrium, the force F on the pulley axle ... Diagram 2a - Another simple pulley system similar to diagram 2, but ...
Consider all the forces acting on each object individually, set up a coordinate system, and draw force diagrams for each. It is usually most convenient to set the ...