10-08-2014, 03:20 PM
I didn't like the way the too-light hook hung on the thread, and created a new sheave for it by punching discs out of sheet brass and soldering them together. However, I didn't build mine to work, as there are too many other things which would need to be corrected.
Regardless of whether you want the crane to work or not, it would be wise to place some tension on the boom, either by adding weight to its outermost end or by use of a spring.
I opted for a spring, as it would be difficult to conceal much weight on the boom's tip, and would then require additional off-setting weight at the rear of the cab.
The spring is simply a piece of .015" music wire. One end is bent upwards and inserted into the bottom of the cab's floor, while the outer end is bent up and then out again, so that it rests atop the lower crossbracing of the boom. I cemented a strip of styrene on each side of it, as the built-in tension gave it a tendency to move laterally.
![[Image: DSCF2027.jpg]](http://i23.photobucket.com/albums/b399/doctorwayne/MofW%20equipment/DSCF2027.jpg)
Wayne
Regardless of whether you want the crane to work or not, it would be wise to place some tension on the boom, either by adding weight to its outermost end or by use of a spring.
I opted for a spring, as it would be difficult to conceal much weight on the boom's tip, and would then require additional off-setting weight at the rear of the cab.
The spring is simply a piece of .015" music wire. One end is bent upwards and inserted into the bottom of the cab's floor, while the outer end is bent up and then out again, so that it rests atop the lower crossbracing of the boom. I cemented a strip of styrene on each side of it, as the built-in tension gave it a tendency to move laterally.
Wayne