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Airmaster Propellers on a 914...

in 912 / 914 Technical Questions 7 years ago
Has anyone converted a 914 UL with a constant speed hydraulicly controlled prop to an Airmaster electrically controlled prop? We have run into a couple of challenges and lots of questions. I'll spare the Forum the gory details for now, but Airmaster hasn't done this conversion.

Jeffrey Fritts, USAF (ret.)

www.flywwlsa.com

"In aircraft maintenance, good enough is not good enough."

  • Re: Airmaster Propellers on a 914...

    by » 7 years ago

    Yes, It is a fair amount of work. see SI-914-032 for some guidance.
    a hydraulic c/s is much better/faster to react, why go electric?
    Thank you said by: Jeffrey Fritts
      
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  • Re: Airmaster Propellers on a 914...

    by » 7 years ago

    The aircraft owner thought it might be a good idea. This is a rebuild of an accident aircraft and the original C/S prop was destroyed in the accident. However, after my extensive research and finding out that yes the conversion would indeed be a "fair amount of work" the owner is moving back towards a hydraulic C/S prop.
    Thanks for the reference to the SI.

    Jeffrey Fritts, USAF (ret.)

    www.flywwlsa.com

    "In aircraft maintenance, good enough is not good enough."

      
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  • Re: Airmaster Propellers on a 914...

    by » 7 years ago

    Any comments on 914 performance difference after changing from fixed pitch to constant speed prop? Any numbers on speed, climb rate, etc?
    Thank you said by: Jeffrey Fritts
      
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  • Re: Airmaster Propellers on a 914...

    by » 7 years ago

    A CS prop vs a fixed pitch on the 914 is night and day. A ground adjustable prop is a waste on the 914.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

    Thank you said by: Jeffrey Fritts
      
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  • Re: Airmaster Propellers on a 914...

    by » 7 years ago

    Very well said. I totally agree, and it is a shame that the LSA rules prevent a CS prop. Maybe the FAA was worried about the complexity of hydraulic props, but with today's electrically controlled props there should be no issues.

    I have this quote from Airmaster (It looks like the total hardware cost will be around $8,300) and I was wondering if you could recommend the best shop to do the install, preferably in Florida or the Southeast.

    AP332CTF-WWR68W https://www.airmasterpropellers.com/ap332ctf-wwr68w
    This is a 3 blade unit based around Whirlwind W series blades. Comes naturally in black / white tip but can have a white/red paint scheme if desired for a small extra charge. Very solid performer. You can see how it looks here https://www.airmasterpropellers.com/john-crone
    Cost USD7610 for complete propeller

    Only additional item is an extension (both propellers would need this) of 3.25in in the style shown here https://www.airmasterpropellers.com/ae-375
    Cost USD290

    Freight would be USD390 DHL express to your door.
      
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