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

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

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$1.05
Status:
Out of stock!
SKU:
329000343-0
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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

  • SKU 329000343-0
  • Brand Gemfan
  • Shipping Weight 14.0000
  • Length 190.00
  • Width 10.00
  • Height 60.00
  • Diameter X(Inch) 5.00
  • Pitch Y(Inch) 4.50
  • Rotation CW/CCW
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cheap but great performance

verified_user Quality:
trending_up Value:
playlist_add_check Overall:

cheap but great performance

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

verified_user Quality:
trending_up Value:
playlist_add_check Overall:

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

toste. davvero toste

verified_user Quality:
trending_up Value:
playlist_add_check Overall:

toste. davvero toste

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