Finished version of Solenoid Engine. Hand wound coil, runs on 12 volts DC. Coil is wound with #24 magnet wire on a coil form that is .45" diameter and 2" long. Finished coild is about 7/8" diameter.
C02 powered, home made airgun I just finished building from scratch. Has a Lothar Walther barrel and holds about 40 grams of CO2 in the reservoir.
Pictures: http://s192.photobuc ket.com/albums/z195/ cffellows/Airgun/