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A fan clutch is a thermostatic engine cooling fan that can freewheel at low temperatures when cooling is not needed, allowing the engine to warm up faster, relieving unnecessary load on the engine. As temperatures increase, the clutch engages so that the fan is driven by engine power and moves air to cool the engine.
Freehub vs freewheel hub. The freehub concept answers several drawbacks encountered with the freewheel design: Freewheels are threaded onto an axle hub, using conventional right-hand threads. As the bicycle rider pedals, the freewheel is continuously kept tight, as chain torque is in the right-hand direction. This becomes a problem when the ...
There are two approaches to Gibson assembly. A one-step method and a two-step method. Both methods can be performed in a single reaction vessel. The Gibson assembly 1-step method allows for the assembly of up to 5 different fragments using a single step isothermal process. In this method, fragments and a master mix of enzymes are combined and ...