Announcing the A99 Engine

The A99 is an inline triple liquid cooled two-stroke engine with a total displacement of 99cc. Designed by Cobra Aero to take advantage of the latest technologies in additive manufacturing; the A99 is in active development with first fire expected summer of 2019.

Key Features:

  • Reduced vibration and smooth torque transfer (three pulses per revolution instead of one)
  • Improved muffling performance by spreading exhaust pulses in time
  • Improved power and SFC from three-into-one cross-stuffing exhaust
  • Ideal for spark ignited heavy fuel due to small cylinder bores and liquid cooling
  • Based on the proven combustion system from the A33

A99 inline triple liquid cooled engine

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