After takeoff from RWY 1, the acft was observed to climb in a steep attitude into the clouds. The acft crashed in a nearvertical attitude about 3/4 mi from the RWY on a bearing of 050 deg. The control lock pin flag was found in the vicinity of the control column with the pin missing. Examination of the elevator trim motor gears revealed a damaged tooth on the drive gear & a series of marked teeth on the driver gear. The elevator trim tab was found in the max deflection position (full-up tab). The elevator trim motor, when operating, takes 57.5 secs to move from neutral to full up; 27 secs to move from neutral to full down; & 67 secs to move from full up to full down. When the control lock pin is installed, the elevator is locked 12 degs down & the aileron is locked 8 degs right aileron up. The left prop blades were bent aft about the blade faces. Some chordwise scrapes were noted. The prop had separated from the eng drive shaft under a torsion & bending load.