CRP-1 computer The CRP-1 is designed particularly for the student and private pilot. Easy to handle, it includes all the necessary functions for examination, planning and flying requirements. This model is widely used by flying training organisations in the United Kingdom and throughout the world. Circular slide rule side with clear durable cursor. For calculation and conversion of temperature, time, distance, volume, altitude, speed, weight, fuel, endurance, multiplication and division, 1 in 60 rule, compressibility correction etc. Coloured scales and lettering enhance operation and clarity. Wind triangle side incorporating sliding scale with speed range of 40-850 and clear rotating disc for lead pencil plotting. Use it for calculation of heading and groundspeed, wind velocity, head and crosswind components etc. The CRP-1W has a wind arm on the wind triangle side to prevent the necessity of plotting with a pencil. FOR MICROLIGHT PILOTS A slow speed scale, with range 10 -120 is suited to microlight pilots and is available as an optional extra for the CRP-1.