Building a Collapsible Marching Machine
Last Update: 12/31/11
A marching block is a acoustical device that simulates the sound of a battalion of people (got to be pc) marching. Here is the method that I used to build mine.
(Click pics for bigger view.)
One piece of wood 2" x 3" x 106" (2 2"x3"x8" 's)
1 wooden dowel 1.5" x 48"
50' of thin rope
3 hinges and 1 hasp
9 1/4 in. dia. eye bolts with washers
9 screw in eyebolts
20 2.5 in. 1/4 in hex bolts with nuts and washers
20 1.5 in. fender washers
Cut wood into 4 pieces. 2- 33 in long and 2- 20 in long
Drill holes for the eyebolts in 1 short and 1 long piece according to plan.
Cut dowel into 2.25 in. pieces and drill a 1/4 in. hole in the middle. Use a larger drill bit to counter sink the holes for the bolts on the bottom of the pegs.
Sand/stain/paint/whatever the wood.
Assemble the frame as shown. You may have to drill additional holes in the hinges to assure secure mounting.
Secure the upper Left corner by drilling 2 holes in the long piece
Put 2 screws through the holes into the other piece to act as pins to hold it together.
Use the hasp to lock the 2 pieces together.
Mount the eye hooks and bolts in the frame and attach rope.
Assemble pegs and attach to rope bolting securely
Mount handle in a convenient position.
Collapse by removing the pegs and undoing the removable eyebolts. Wrap them up and secure them to the permanent eyebolts. Use 2 of them to hole the collapsed machine together as shown in photo.
Total Cost: ~ $30