Rotax 914 UL replacement for Lyc O-235

Home › Forums › Ask the Gurus › Rotax 914 UL replacement for Lyc O-235

Viewing 5 reply threads
  • Author
    Posts
    • March 12, 2021 at 12:25 #15446
      Gregary Martel
      Participant

      My O-235 Is coming up due for a second major overhaul. Has anyone considered replacing their O-235 with a rotax 914 UL or even a 912? If so what are the benefits and pitfalls? By chance is there already an STC?

    • March 12, 2021 at 15:31 #15448
      Roscoe Rosché
      Keymaster

      Not at this time and one NOT in the works. Go for it!

    • March 12, 2021 at 23:10 #15449
      Richard Harrison
      Participant

      Atol Avion has been granted an STC for the installation of the 100 HP Rotax 912 S3 and a constant speed propeller in the Cessna 150. I expect they spent a huge sum of money getting through the STC process. This might make sense for the 150 which is still very popular for flight schools and with over 10,000 units probably still in service, it would make less sense to go this route for the AA-1. Look to the 0-320 as a more desirable (and cost effective) answer. STC’s reliably available.

    • March 13, 2021 at 14:13 #15450
      Gregary Martel
      Participant

      I have been looking at options to improve overall performance and range with the potential to also increase payload. It seems the fuel burn is about 15-20% lower than the O-235 and would eliminate the need for aux fuel and lower the hourly cost when compared to the O-320 STC.

      At the present this is still a research exercise since the lower weight of the Rotax would impact the CG too.

    • March 13, 2021 at 20:50 #15451
      Richard Harrison
      Participant

      Another option is a HC 0-235 upgrade. Talk to Roscoe about “Spanky”.

    • March 15, 2021 at 10:00 #15454
      Gregary Martel
      Participant

      Thank you. Roscoe, tell me about “Spanky”!

  • Author
    Posts
Viewing 5 reply threads
  • You must be logged in to reply to this topic.