Davtron’s Model 655 is a computer-based product that computes density altitude automatically. No longer does the pilot need to retrieve outside air temperature and pressure altitude, then enter this into a flight computer. The Model 655 measures outside air temperature, and accepts pressure altitude information from the blind encoder or encoding altimeter, then converts this information to a direct read-out of density altitude. The density altitude is computed using U.S. standard atmosphere tabulation. Take-off roll, maximum rate of climb, and fuel comsumption are all determined easily from density altitude and the aircraft’s flight manual.
FAA Approved Model List.
- F....Outside air temperature °F
- C....Outside air Temperature °C
- P....Pressure altitude X1000
- D....Density altitude X1000
- E....Aircraft voltage
- All five functions in one small indicator
If your airframe is not shown on the list, it is recommended a FAA form 337 should be filed with the local FSDO.
INSTALLATION ELIGIBILITY - Beech Models 35, A35, B35, C35, D35, E35, F35, G35, H35, J35, K35, M35, N35, 35-33 and 35-A33