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Gemfan Propeller 5x4.5 Black (CW/CCW) (2pcs)

Gemfan Propeller 5x4.5 Black (CW/CCW) (2pcs)

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Was  $0.99

Rating:
Stock:
Weight:
14 g
SKU:
329000343-0

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Product
Description

GemFan Propellers have set the gold standard in the small class Multirotor community. Known for their durability, great balancing and superb hub centering and expendable price. They come packaged as a set of 2, with one CW rotation and one CCW rotation. There is a wide range of color options that can be mixed and matched to help with multirotor orientation. This is the perfect upgrade for any small multirotor.

Specs:
Size:5045 (5x4.5)
Color: Black
Hub: 5mm (adapters included for 4mm,3.17mm and 3mm)
Material: Carbon reinforced Nylon

Included:
1 x CW rotation
1 x CCW rotation
Adapters

Product
Specifications

Additional Information

  • SKU:
    329000343-0
  • Brand:
    No
  • Weight(g)
    14.00
  • Length
    190.00
  • Width:
    10.00
  • Height:
    60.00
  • Pitch Y(Inch)
    4.50
  • Material
    Plastic
  • Rotation:
    CW/CCW
  • Unit Weight (g):
    No
  • Type
    Normal
  • Blade Count
    2
  • Diameter X(Inch):
    5.00
Community
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cheap but great performance
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These props are very stiff and well shaped.
[WARNING] However, the structural integrity of these props are nearly impossible to verify after a crash. I was tuning PIDs for a 250 quad (using 2150kV MS Elite 'Mini Monster' motors and a 4S battery) and had a few rough landings. After the first prop broke, I carefully checked each prop after each flight, as they were snapping at the root.
I finally had the PID's tuned in to prevent oscillation at ~50pcnt throttle, so I tried gunning the throttle to see how it handled at ~80pcnt throttle.

In a split-second, 7 out of the 8 total blades on my quadcopter exploded / ripped apart mid-air and the quad fell to the ground. Some blades flew more than 10 meters, one blade had flown inwards and ripped ~4cm of heatshrink off the side of my video TX and one propeller was found in at least 3 pieces, split down the length of the blade into slivers.

While I cannot recommend these props for a quad using the same high-power motors and 4S battery setup, I do believe these props operate fine with a more moderate / 3S setup.

Here is a link to a video of the incident: https://www.youtube.com/watch?v=8Ut29iIa2xw
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toste. davvero toste
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