Cruising Speed Formula<br /><br />rpm -------------- mph -------------- rpm per mph<br /><br />2,000<br /><br />2,500<br /><br />3,000<br /><br />3,500<br /><br />4,000<br /><br />4,500<br /><br />Begin plane and trim. Record speed at rpm, slowly advance throttle to next increment, continue to...