Gemfan Vortex 21x13E Electric Propeller, Glass Fiber Nylon, 6.35mm Bore, 2PCS/Bag

Gemfan

$28.99 USD

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Overview

The Gemfan Vortex 21x13E is an electric propeller made from glass fiber nylon, supplied as 2 pieces per bag. Size is 21x13E (21-inch diameter, 13-inch pitch) with a 6.35 mm (0.25 in) center hole.

Key Features

21x13E electric propeller (21 in diameter, 13 in pitch)
Glass fiber nylon construction
6.35 mm / 0.25 in center hole diameter
2PCS propellers per bag

For fitment and setup questions (shaft/adapters, motor matching, and mounting hardware), contact support@rcdrone.top or visit https://rcdrone.top/.

Specifications

Size	21x13E
Propeller Diameter	21 inches
Pitch	13 inches
Hub Diameter	31.5 mm
Center Thickness	14.5 mm
Center Hole Diameter	6.35 mm / 0.25 inches
Weight (Single Propeller)	121.26 g
Product Weight (Including Packaging)	135 g
Material	Glass fiber nylon

Static Test Data (from provided image)

Header: GemFan&Xoar 21x13, 6360-190KV
Voltage: 37V
Note: X-axis is throttle

Throttle %	10	20	30	40	50	60	70	80	90	100
Current (A)	1.33	2.72	4.76	8.58	15.49	24.75	38.20	52.93	71.51	77.88
RPM	645	1644	2243	2820	3493	4099	4713	5210	5699	5843
Thrust (g)	184	712	1514	2437	3699	5082	6725	8126	9805	10346
Efficiency (g/W)	3.7	7.1	8.6	7.7	6.4	5.6	4.8	4.2	3.8	3.7