HFC14 Wall Jib Crane
Although wall jib cranes are obsolete, the self evident confluence of the four forces at the end of the jib illustrates the application of a triangle of forces so clearly to a real situation that this is an invaluable lesson.
This wall mounted self-contained jib crane has spring balances built into its two members. After loading the member lengths can be adjusted to their no-load lengths.
The jib out-hangs and the crane cable inclination can be readily changed HFC14 Wall Jib Crane.