/ homebrewman23  
3 @ 3/4" T connector
2 @ 3/4" X (four connection cross joiners)
5 @ 3/4" end caps
6 @ 3/4" 90's
4 @ 1" T's
4 @ 1" to 3/4" adapters
3 @ 10" 3/4" lengths of PVC
1 @ small can of PVC cement
2 @ 3/4" metal pipe brackets
1 @ 3/8" X 3" bolt or lynch pin (unthreaded for release pin)
2 @ 1" welded steel rings
5 feet nylon cord or shoe lace
10 feet foam pipe insulation
3 @ plastic tent stakes heavy duty
20 feet bungee or surgical tubing
cheap fish scale (hang type)
My launcher is 5 feet long and 3 feet wide but yours can be whatever you need it to be. Always set the bungee cord tension to 5x the weight of the model