STOL with the 914 Rotax - Savannah Aircraft

STOL with the 914 Rotax

Effects on STOL and Cruise Speed:

  1. STOL Performance:

    • With the extra 15 horsepower from the 914 (115 hp) compared to the standard 912ULS (100 hp), the takeoff roll is shorter, especially in higher-density altitudes.
    • The turbocharger allows the engine to maintain power at higher altitudes, further enhancing STOL performance in areas where the air is thinner (like mountainous regions).

  2. Cruise Speed:

    • The Savannah S and SR with the 912ULS typically cruise around 90-100 knots.
    • With the 914, cruise speed can increase slightly, with reported values ranging from 105 to 110 knots, depending on conditions, weight, and propeller configuration.
    • The turbocharger allows the engine to sustain higher power outputs at altitude, which can result in improved cruise speed when flying at higher altitudes compared to the 912ULS.

Overall Impact:

  • The STOL capability is significantly enhanced, making the aircraft more responsive in challenging conditions, such as short runways or high altitudes.
  • The cruise speed sees a modest increase, mainly because the 914 can maintain better performance as altitude increases, where naturally aspirated engines like the 912ULS would lose power.