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Permalink Reply by Bob Simmons on August 10, 2023 at 1:00pm

Not sure of bolt patterns, diameter, rotation, etc., but you better have pretty big tires to swing a 76 inch prop on a Cruzer.

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Permalink Reply by John Bowers on August 10, 2023 at 9:23pm

I understand.  I'm a complete novice here, it being my first airplane build.  I won't be ready to mount motor and propellor until probably March 2024, so I have plenty of time to learn the critical details such as what you're pointing out to me.  Really appreciate your input.

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Permalink Reply by Jan Eggenfellner on August 12, 2023 at 7:15pm

Typically we use a 3 blade DUC propeller or Whirlwind - we use a bolt pattern like the Rotax 912. The Cruzer will typically use a 70-71" propeller with the Viking 130, unless you are doing a big tire Cruzer setup - then 75"

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Permalink Reply by John Bowers on August 13, 2023 at 1:59pm

I will likely follow your lead with the 3-blade prop on the Viking 130HP.

By the way, I saw a YouTube video from Viking suggesting a new GM motor plant, from the 2024 Chevy 3 cylinder turbo engine in their new car.

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Permalink Reply by Carl Orton on August 15, 2023 at 10:01pm

FAA requires 7” from prop tip to ground. I had to send my prop back to Sensenich to have them trim it 2” (1” each tip). 

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