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Ground-adjustable propeller

Ground-adjustable propeller
A ground adjustable propeller on a [[Rotax 912S]] engine, mounted in a [[3Xtrim 3X55 Trener]].

A ground-adjustable propeller is a simple type of aircraft variable-pitch propeller where the blade angle can be adjusted between pre-set limits of fine and coarse pitch. As its name implies, a ground-adjustable propeller may be adjusted only when the aircraft is on the ground and when the engine is not running.

Ground-adjustable propellers, which are mostly used on light and very light aircraft, are much cheaper and lighter than more sophisticated and versatile in-flight-adjustable propellers. A ground-adjustable propeller allows pitch changes to be made, although not in flight, to optimise the aircraft for current payload and flying conditions.

Adjustment

To adjust the propeller, the blades are loosened in the hub, a new angle set and then the hub tightened. The process is one of compromise, and of trial & error. After a flight, if, say, climb seemed too sluggish, the pitch angle may have been set too coarse and would need to be made finer. Alternatively, if the aircraft reached take-off speed quickly but struggled to reach a comfortable cruise speed, the pitch would need to be coarsened. The person making the adjustments would be advised to do so in small increments until a satisfactory outcome were reached.

Manufacturers

  • Arplast EcoProp
  • Ivoprop
  • Warp Drive Inc
  • Woodcomp

References

References

  1. Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', page 86. Aviation Supplies & Academics, 1997. {{ISBN. 1-56027-287-2
  2. "Adjustable-Pitch Propellers (Part One)". Flight Learnings.
  3. link. (2017-06-10 , retrieved 6 June 2015)
  4. "Arplast Hélice sarl". Arplast-helice.com.
  5. Dave Loveman. "IVOPROP Ground Adjustable Magnum Propeller >". Ivoprop.com.
  6. "Warp Drive Carbon fiber Composite Propellers". Warpdriveprops.com.
  7. "ON GROUND ADJUSTABLE PROPELLER – TYPE KLASSIC 170 - WOODCOMP". Woodcomp.cz.
Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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