Three-Blade Propeller for the RV-12/RV-12iS Available | Aero-News Network
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Mon, Feb 10, 2020

Three-Blade Propeller for the RV-12/RV-12iS Available

Better Climb and Aerodynamic Braking Action Reported

Van’s has published updated RV-12/12iS powerplant kit order forms, a new plans section (47AiS/U) and a service letter (SL 19-12-31), all of which are related to their new (now-available) and optional 3-blade Sensenich propeller kit.

Van's notes that, "We displayed this prop on a stand in our booth at Oshkosh last year and flew it to the show on one of our factory aircraft. It garnered quite a bit of interest. Now that the engineering has been completed and testing of the final install package is all wrapped up, the three-blade prop and spinner kit is available to order as an option on new powerplant kit orders (you’ll get to choose either a two-blade or three-blade prop when you order). You can also place a stand-alone order for the prop without the rest of the Powerplant kit (just use the powerplant kit order form and select only the 3-blade prop option in that case).

Note that when building your airplane, in order to register ELSA, the parts – including the propeller – must be bought directly from Van’s and tracked in our records under that aircraft serial number. Once an aircraft has been licensed and registered ELSA you may, of course, make any changes as you wish."

Van's specified the changes three-blade prop installations may offer over the two-blade:

  • Cruise performance was the same (at lower altitudes)
  • Climb performance was greater
  • Propeller braking action was slightly greater, which allowed a slightly steeper descent angle in the pattern
  • The sound/pitch is different, although the measured noise level is about the same (they are the same diameter).

Van's seems to like the aesthethetics... noting that the blades are wider on the two-blade prop, and that while some folks prefer the look of three blades, others may still prefer the two-blade, as well as the thinner thinner blade profile.

FMI: www.vansaircraft.com/2020/02/three-blade-propeller-for-the-rv-12-rv-12is-available/

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