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The launchers will launch a plastic training dummy from a blind about the same height and distance as a winger will launch a duck. I used them until I changed over to some homemade wingers and started launching ducks.
The triggers are TruFire Patriot Archery releases. Servos are standard model airplane servos. The radio is a 2.4 ghz airplane radio. Moving a stick down, or inward will launch the dummy. For better reception and consistent releases the receiver had to be mounted off the ground about two or three feet. I only used one receiver for these launchers.