Calcolatrice Sistema di Pulegge Gratuita

Calcola il vantaggio meccanico di un sistema di pulegge.

N
%

Actual Effort Force

277.8 N

Ideal Mechanical Advantage4
Ideal Effort Force250.0 N
Rope Pull per Metre Lifted4 m

Actual Effort Force vs Number of Supporting Rope Segments

Vedi formula →

Formula

## Compound Pulley Mechanical Advantage A pulley system reduces the effort needed to lift a load by distributing the weight across multiple rope segments. ### Formulas **Ideal MA = number of supporting rope segments (n)** **Effort = W / (n x efficiency)** **Rope travel = n x lift distance** The trade-off is that you must pull n times more rope to lift the load a given distance. Friction in each pulley sheave reduces the actual mechanical advantage.

Esempio Risolto

A 4-part block and tackle lifting 1000 N at 90% efficiency.

  1. 01Ideal MA = 4
  2. 02Ideal effort = 1000 / 4 = 250 N
  3. 03Actual effort = 1000 / (4 x 0.9) = 277.8 N
  4. 04Rope travel = 4 m of rope per 1 m of lift.