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Gemfan · Propellers

Gemfan D63 Ducted Tri-Blade

Ducted tri-blade 2.5" cinewhoop prop with a 3 inch pitch, T-mount.

Specification last checked 2026-07-27

  • Propeller size2.5 inDecides what it fits
  • Propeller mountingT-mount (2 × M2)Decides what it fits
  • Propeller pitch3 inHow far the prop screws forward per revolution: the second figure in "5x4.3x3".
  • Blades3The third figure in "5x4.3x3".
Compatibility

What this fits

Checked against every other product in the catalog by the same engine the planner runs, rule by rule. Where a specification is missing the answer is unknown, which is a different answer from compatible.

Complete drone

Works with (27)87 not yet judged · 4 for other sizes
Show the 4 made for a different size or voltage, and 87 we cannot judge yet, because a deciding specification is not recorded

Frame

Works with (2)18 for other sizes
Show the 18 made for a different size or voltage

Motors

Does not work with (25)12 not yet judged
Show the 12 we cannot judge yet, because a deciding specification is not recorded
Offers

Where to buy

This listing does not say which warehouse ships it. Most orders leave China, so expect import VAT and a carrier handling fee unless an EU warehouse is chosen at checkout.

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Evidence

Recorded specification

Every value carries the source it was read from. A property with no recorded source is marked as such rather than presented as a fact. If one of them is wrong, tell us: it is the fastest way it gets fixed.

PropertyValueSource
Propeller size decides fit2.5 inRaceDayQuads product specificationschecked 2026-07-27Quote 1, below the table
Propeller pitchHow far the prop screws forward per revolution: the second figure in "5x4.3x3". More pitch trades grip for top speed, so no direction.3 inRaceDayQuads product specificationschecked 2026-07-27Quote 1, below the table
BladesThe third figure in "5x4.3x3". More blades grip harder and drain the battery faster.3RaceDayQuads product specificationschecked 2026-07-27Quote 1, below the table
Propeller mounting decides fitHow the propeller attaches: threaded 5 mm shaft with a nut, T-mount screws, or pressed onto a bare shaft it must match exactly. A prop made for one cannot be fitted to another.T-mount (2 × M2)RaceDayQuads product specificationschecked 2026-07-27Quote 1, below the table
WeightBuild-critical rather than compat-critical: needed to answer registration and class questions.1.36 gRaceDayQuads product specificationschecked 2026-07-27Quote 1, below the table
  1. RaceDayQuads product specificationschecked 2026-07-27Gemfan D63 Ducted Durable Tri-Blade 2.5" Cinewhoop Prop 8 Pack; Mounting Type: T-Mount; Material: PC; Diameter: 63mm; Pitch: 3 in; Inner shaft diameter: 1.5mm; Hub Thickness: 4.9 mm; Weight: 1.36g each
Guides

The standards this part is judged by

What the properties above actually mean, which differences are absolute, and where the names used in shops mislead.