Propeller / Governor

Discussions

• FB thread on prop selection 4/2024
• FB thread on prop selection 3/2023
• FB thread on prop selection 2/2023
• FB thread on prop selection 12/2021
• FB thread on prop selection 10/2021
• FB thread on cowl modifications for 3-bladed prop 9/2020
• FB thread on cowl modifications for 3-bladed prop 6/2023

Companies Providing Propellers

• Vans order page for Hartzell props, 80 inch 2 blade and 78 inch 3 blade
• Hartzell 193 document series on experimental props
• Vans order page for MT props, 76 and 78 inch 3 blade

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Note: Whirlwind closed the Ohio sales office in Feb 2023 and operated only out of their headquarters near San Diego.
Note: Whirlwind was acquired by Hartzell in March 2024.
Note: Whirlwind moved the whole company to Ohio, nothing left in San Diego.
Note: Whirlwind's packaging is inadequate (see this FB post), either pick it up or get it packed into a crate.

• Whirlwind prop, 78 inch 3 blade for RV-10 with improved IO-540 engines (includes spinner)
  Whirlwind 330 hints
• Whirlwind prop, 77 inch 3 blade for stock RV-10 engines (includes spinner)

Companies Providing Governors

• Vans order page for Hartzell governor (may also work for Whirlwind, see note below)
  NOTE: Check on the governor - not on the box - that you have actually received model S-1-32 and not model S-1-79 which is for IO-360. NOTE: Propellers have the upper pressure need / limit expressed as a range. Check this in their spec sheets or in the delivery papers. For example, the Whirlwind 330 hub specs a range of 300-330. So, this hub may need 300 psi to go full high pitch, but must never see more than 330 psi. The governor's max pressure is expressed as the "relief valve pressure" which is given as a range in their specs. The Hartzell S-1-32 is supposed to have a relief valve pressure of between 275 and 300 psi, but each governor is tuned to a value somewhere in this range after manufacturing. The actual pressure is.noted on their factory test sheet that comes with them. If yours is at the lower end (275), you might be missing 25 psi to fulfill the Whirlwind specs, if it's at the upper end, you are probably fine (a particular governor had it set to 295 psi, so they might be generally aiming for just under 300 during production). The highest pitch is only needed when going full throttle while demanding a very low rpm (way over-squared). Since the relief valve pressure is a factory setting, it might be possible to send it back to Hartzell and have it set closer to 300 psi if yours is on the lower end.
• Vans order page for MT governor
• Jihostroj Governor P920-032A via Whirlwind (link no longer works, check with Whirlwind, now Hartzell)

Hints for Governors

• Hartzell S-1-32 Governor
• MT Governor
• Jihostroj Governor

Accessories

• Vans bracket for Hartzell and MT governors to run prop cable on top of the engine (needed if you have an AC compressor but also an option for regular engine setups)

Governor Adjustment Hints

• Vic's video on the initial governor adjustment
• VAF discussion on how not to interpret Vic's video

3D print Files

• Hartzell 3D models
• See also section 3D-Printed Tools and Parts for a CAD model for the Whirlwind prop.