Brief Description: Countersink and Airspeed Cutout
Drilled oversize mounting holes and countersunk 0.080" panel for bugle head mounting screws. Layout of airspeed indicator. Thought the airspeed housing would clear mounting nutplate but too close by 1/8". Had to remove nutplate. Used 3-1/8" flanging tool to cut mounting hole for instrument. Face of airspeed indicator was very tight against 0.080" panel, required filing with half-round to provide clearance. Squared case of AI with bottom of panel and drilled instrument mounting holes.