5-inch FPV racing motor

SunnySky Edge R2205

A 5-inch racing motor from SunnySky’s Edge Racing line: 22 × 5 mm stator, 30.5 g, and up to 1,407 g of thrust in SunnySky’s 16.8 V test (2300KV, GF5045×3).

5-inch racing
3S–4S
5-inch tri-blades (GF5040×3, GF5045×3)

Drawing the 3D model…

Throttle60%

The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 2205 motor drawn from SunnySky’s published sizes, not its exact design. No-load speed is KV × 14.8 V, a nominal pack for this version. SunnySky’s bench tables for it step by thrust rather than throttle, so they are in the bench data below, not on this readout.

Version

2300KV3S–4S2500KV3S–4S

SunnySky suggests a 30–45 A ESC and GF5045×3 or GF5040×3 props.

Weight: 30.5 g; with leads; 30 g for the 2500KV

from $12.90a motor at SunnySky USA

A set of four: $51.60

Price seen Oct 19, 2026. Plain links: we earn nothing from them.

What you get for $12.90

About 1.4 kg on 4S
In SunnySky’s 16.8 V test the 2300KV reached 1,407 g on a GF5045×3 at 39.5 A, and 1,230 g on a GF5040×3 at 30.8 A.
Source: SunnySky product page
Up to 1.5 kg for the 2500KV
The 2500KV reached 1,500 g on a GF5045×3 at 16.8 V, drawing 47 A, and 1,350 g on a GF5040×3.
Source: SunnySky product page
Edge Racing line
SunnySky sells it under its Edge Racing name as an FPV racing motor; its photos show a white bell with pink trim.
Source: SunnySky product page

What to pair it with

Our reading of SunnySky’s numbers, so your build matches what the motor was tested with.

ESC: SunnySky suggests 30–45 A for the 2300KV and 45–50 A for the 2500KV, and rates them for 40 A and 45 A for 10 s. Its tests reached 39.5 A and 47 A on a GF5045×3 at 16.8 V. (SunnySky product page)
Props: SunnySky recommends GF5045×3 or GF5040×3; the 5045 pulled more in every test. (SunnySky product page)
Battery: 3S–4S; SunnySky tested at 14.8 V and 16.8 V. (SunnySky product page)
Frame: Four M3 holes on a 16 × 16 mm pattern, 3 mm deep. (SunnySky product page)

Where to buy

SunnySky USASunnySky’s official US store; 2300KV or 2500KV, same price
$12.90seen Oct 19, 2026
Visit
BuddyRC2300KV or 2500KV, same price
$12.90seen Oct 19, 2026
Visit

Plain links, not affiliate links. Prices change; the store’s page has the current one.

Full specs

Spec	Value	Source
KV	2,300 rpm/V (also 2500KV)	SunnySky product page
Stator	22 × 5 mm (2205)	SunnySky product page
Configuration	12N14P (12 stator slots, 14 magnet poles)	SunnySky product page
Battery	3S–4S LiPo	SunnySky product page
Weight	30.5 g (with leads; 30 g for the 2500KV)	SunnySky product page
Dimensions	φ27.4 × 18 mm without the shaft; 31.5 mm long with it	SunnySky product page
Shaft	M5 thread, standing 13.5 mm above the bell (the top 9.5 mm threaded), with an M5 × 0.8 nylock nut (from SunnySky’s drawing; its spec table gives the shaft diameter as 8.0 mm)	SunnySky product page
Mounting	4 × M3 holes, 3 mm deep, on a 16 mm circle (16 × 16 mm)	SunnySky product page
Internal resistance	53 mΩ (46.7 mΩ for the 2500KV)	SunnySky product page
Idle current	1.45 A (at 10 V; 1.4 A for the 2500KV)	SunnySky product page
Max continuous current	40 A (for 10 s; 45 A for the 2500KV)	SunnySky product page
Max continuous power	670 W (756 W for the 2500KV)	SunnySky product page
Leads	20 AWG, 120 mm	SunnySky product page

Bench data

Redrawn from SunnySky’s test reports. Thrust is static pull on a bench, more than you get in flight. Power is volts × amps; efficiency is thrust divided by power.

2300KV on 3S–4S4 props

Prop	Current (A)	Thrust (g)	Power (W)	Efficiency (g/W)	RPM
GF5045×3at 16.8 V	1	100	17	5.95	7682
	2.4	200	40	4.96	10686
	4.2	300	71	4.25	13142
	6.3	400	106	3.78	15057
	8.8	500	148	3.38	16833
	11.6	600	195	3.08	18442
	14.6	700	245	2.85	19930
	17.6	800	296	2.71	21282
	20.9	900	351	2.56	22738
	24.7	1,000	415	2.41	23704
	33.2	1,200	558	2.15	26150
	39.5	1,407	664	2.12	27983
GF5040×3at 16.8 V	1	100	17	5.95	8832
	2.5	200	42	4.76	12356
	4.3	300	72	4.15	15460
	6.4	400	108	3.72	17685
	8.9	500	150	3.34	19835
	11.4	600	192	3.13	21869
	14	700	235	2.98	23603
	16.9	800	284	2.82	25003
	19.9	900	334	2.69	26621
	23.5	1,000	395	2.53	28128
	30.8	1,230	517	2.38	30855
GF5045×3at 14.8 V	1.1	100	16	6.14	7726
	2.6	200	38	5.2	10780
	4.6	300	68	4.41	13028
	7	400	104	3.86	15184
	9.7	500	144	3.48	16887
	12.6	600	186	3.22	18587
	15.7	700	232	3.01	19832
	19.2	800	284	2.82	21270
	22.9	900	339	2.66	22750
	27	1,000	400	2.5	23790
	33.7	1,180	499	2.37	25562
GF5040×3at 14.8 V	1.1	100	16	6.14	8803
	2.8	200	41	4.83	12503
	4.8	300	71	4.22	15374
	7.05	400	104	3.83	17710
	9.6	500	142	3.52	19812
	12.4	600	184	3.27	21730
	15.4	700	228	3.07	23679
	18.4	800	272	2.94	25180
	22.1	900	327	2.75	26445
	25.8	1,010	382	2.65	28001

Source: SunnySky product page

2500KV on 3S–4S4 props

Prop	Current (A)	Thrust (g)	Power (W)	Efficiency (g/W)	RPM
GF5045×3at 16.8 V	1	100	17	5.95	7747
	2.4	200	40	4.96	10852
	4.3	300	72	4.15	13043
	6.4	400	108	3.72	15030
	9	500	151	3.31	17053
	11.9	600	200	3	18642
	15	700	252	2.78	19935
	18.2	800	306	2.62	21417
	21.5	900	361	2.49	22476
	24.9	1,000	418	2.39	23768
	34.5	1,200	580	2.07	26202
	47	1,500	790	1.9	29093
GF5040×3at 16.8 V	1	100	17	5.95	8859
	2.5	200	42	4.76	12540
	4.5	300	76	3.97	15270
	6.6	400	111	3.61	17800
	9.1	500	153	3.27	20000
	11.65	600	196	3.07	21564
	14.4	700	242	2.89	23338
	17.3	800	291	2.75	24880
	20.8	900	349	2.58	26877
	24.3	1,000	408	2.45	28001
	31.7	1,200	533	2.25	30740
	36.9	1,350	620	2.18	32664
GF5045×3at 14.8 V	1.1	100	16	6.14	7747
	2.7	200	40	5.01	10789
	4.7	300	70	4.31	13258
	7.1	400	105	3.81	15070
	9.7	500	144	3.48	16870
	13	600	192	3.12	18433
	16.3	700	241	2.9	20066
	19.8	800	293	2.73	21322
	23.8	900	352	2.56	22692
	27.9	1,000	413	2.42	24047
	40	1,280	592	2.16	27082
GF5040×3at 14.8 V	1.2	100	18	5.63	8769
	2.8	200	41	4.83	12422
	4.9	300	73	4.14	15352
	7.2	400	107	3.75	17680
	9.9	500	147	3.41	19990
	12.7	600	188	3.19	21753
	15.9	700	235	2.97	23598
	19.3	800	286	2.8	25202
	22.8	900	337	2.67	26800
	26.6	1,000	394	2.54	27936
	30.9	1,120	457	2.45	29573

Source: SunnySky product page

Inside the motor

A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:

Shaft. An M5 threaded shaft with a nylock nut, standing 13.5 mm above the bell. (SunnySky product page)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 2300KV version reaches about these speeds; a prop loads the motor and brings it down, typically to around 70–75% of these figures at full throttle.

Battery	Volts	No-load rpm (KV × V)	Electrical frequency	ESC steps per second
4S nominal	14.8	34,040	3,971 Hz	23,828
4S full	16.8	38,640	4,508 Hz	27,048
6S nominal	22.2	51,060	5,957 Hz	35,742
6S full	25.2	57,960	6,762 Hz	40,572

A 14-pole rotor has 7 pole pairs, so every turn of the shaft is 7 electrical cycles, and a six-step ESC switches the phases 42 times per turn.

About the 3D model

A generic outrunner drawn from SunnySky’s published sizes: the 22 × 5 mm stator, 27.4 mm bell, 18 mm height, 5 mm shaft, 16 mm mounting circle and 12 teeth and 14 magnets. Anything SunnySky doesn’t publish is typical for a motor this size, and the bell’s spoked top, the base and the inside are a generic design, not this motor’s. The colours are read off the maker’s product photos. There are no logos or markings: it is our drawing, not the maker’s.

Sources

SunnySky: E-R2205 (Edge Racing) product page, Wayback Machine copy captured 2023-01-28 (SunnySky’s own site answers only over http). Spec tables for both KVs, test reports on GF5040×3 and GF5045×3 at 14.8 V and 16.8 V, a dimension drawing and photos. The tests step by thrust, and SunnySky doesn’t label the last row as full throttle; its full-throttle temperatures (76–87 °C after 14–40 s) aren’t copied.. Retrieved Oct 19, 2026.