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What you will need:
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The first thing you will need it to cut the metal L bar into the frame size of your choice. This lifter is 18" long and 8" wide. Now cut the straight bar into the following sizes(matching my model): (1) 16", (3) 8", (1) 12", & (1) 2". Bolt the frame together with the 1" bolts (use lock washers and be sure that the frame is completly square).
The next step is to bend the 2 vertical mounts that will support the lifter rod. You want to bend the mounts so there is a 7/16" gap in the center. This gap is where the lifter shaft will connect. Next connect the vertical mounts to the frame. Once that step is complete, build the lifter arm. Connect the 2" bar to the end of the lifter arm at a 20 degree angle. Connect this bar with a minimum of 2 bolts. You will now need to build the mounting brackets for the pneumatic cylinder. The cylinder will need to swivel from its base so use the mounting hole insted of the threaded nut. You will need to make mounting brackets out of the 1.25" wide bar. Don't drill and mount the cylinder till later in the construction.
The last bar you will need to bend is the stopper bar. This bar will assure that the lifter bar will not slam back into the cylinder. This bar will need to be bent so that it fits inside the frame and will let the lifter bar lay level. You may also want to add a bumper to lesten the noise of the 2 bars comming into contact. The last step is to mount the cylinder's clevis to the lifter arm and the mounting brackets to the frame. Make sure the cylinder can open and close all the way before mounting the base. If the cylinder over extends, the results can destroy the cylinder and bend the frame. Test it out a bunch of times to get the speed set. Be careful how fast you set the erector so that you dont launch your prop into your viewers.
