2.5-inch cinewhoop motor

BetaFPV LAVA 1506

A 4S motor for 2.5-inch cinewhoops such as BetaFPV's Pavo25 V2: 13.6 g, and 497 g of thrust per motor at full throttle on Gemfan D63 three-blade props on BetaFPV's 16 V bench.

2.5-inch cinewhoops such as the Pavo25 V2
4S
Gemfan D63 three-blade props

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 1506 motor drawn from BetaFPV’s published sizes, not its exact design. Thrust, current and power are BetaFPV’s bench figures for the GF-D63-3B prop at 16 V, read straight across between its throttle steps. Its data starts at 30% throttle.

Max thrust: 497 g; GF-D63-3B prop, 16 V
Weight: 13.6 g
Peak current: 19.6 A; full throttle
Max power: 311 W; full throttle

Plain links: we earn nothing from them.

What it pulls

BetaFPV’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.

At 60% with the GF-D63-3B: 207 g of thrust, 6.3 A, 101 W, 2.05 g per watt.

On your quad

All-up weight650 g

3.1 : 1

Thrust to weight at full throttle: four motors pull 1,988 g with the GF-D63-3B at 16 V.

At 60% throttle they pull 828 g, 1.3 times the quad’s weight.

All-up weight is the quad ready to fly, with its battery and camera. The thrust is the maker’s static bench figure; in the air it is lower.

What you get

497 g on 4S
At full throttle on BetaFPV's 16 V bench it pulls 497 g on Gemfan D63 three-blade props, drawing 19.59 A.
Source: BetaFPV drawing and bench table
15 g more than the 1505
BetaFPV says it gives 15 g more maximum thrust than its 1505 4600KV motor, with smoother power.
Source: BetaFPV product page
Made for 4S 2.5-inch quads
BetaFPV designed it for 4S 2.5-inch quads, its Pavo25 V2 in particular.
Source: BetaFPV product page

What to pair it with

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

ESC: BetaFPV pairs it with its F722 35A AIO V2 flight controller. On its bench a motor draws up to 19.59 A at full throttle on 16 V. (BetaFPV product page, BetaFPV drawing and bench table)
Props: BetaFPV recommends Gemfan D63 three-blade props (1.5 mm shaft); its bench uses them. (BetaFPV product page, BetaFPV drawing and bench table)
Battery: 4S; BetaFPV suggests its LAVA 4S 850 mAh and 4S 650 mAh packs. (BetaFPV product page)
Frame: Four M2 screws on a 12 mm circle; BetaFPV names its Pavo25 V2. M2×5 and M2×7 screws come in the box. (BetaFPV product page)

Where to buy

BETAFPVthe maker's store; one motor; the 34 mm-lead version was in stock and the 80 mm sold out when checked
$14.99seen 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	4,200 rpm/V	BetaFPV product page
Stator	15 × 6 mm (1506) (from the size in BetaFPV's name)	BetaFPV product page
Battery	4S LiPo	BetaFPV product page
Weight	13.6 g	BetaFPV product page
Dimensions	φ20 × 16.8 mm (with shaft); body 14.8 mm tall	BetaFPV drawing and bench table
Shaft	1.5 mm, protrudes 2 mm (BetaFPV's spec list gives a 4 mm shaft length; its drawing and lead diagrams show 2 mm above the bell)	BetaFPV drawing and bench table
Mounting	4 × M2 holes on a 12 mm circle	BetaFPV product page
Bell	four M2 prop-mount holes on a 5 mm circle	BetaFPV product page
Max current	19.59 A	BetaFPV product page
Max power	313.44 W (BetaFPV's bench table gives 311.44 W at that current (16 V, 100% throttle))	BetaFPV product page
Leads	24 AWG, 80 mm or 34 mm	BetaFPV product page
In the box	1 motor, 4 × M2×5 and 4 × M2×7 hex flat-head screws	BetaFPV product page

Bench data

Redrawn from BetaFPV’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.

4200KV on 4S, 16 V1 prop

Prop	Throttle	Current (A)	Thrust (g)	Efficiency (g/W)	Power (W)
GF-D63-3B (Gemfan D63, 3-blade)	30%	1.32	47	2.22	21.14
	40%	2.58	87	2.11	41.2
	50%	4.27	148	2.17	68.31
	60%	6.3	207	2.05	100.84
	70%	8.57	261	1.9	137.16
	80%	11.78	331	1.76	188.48
	90%	15.09	400	1.66	241.43
	100%	19.59	497	1.59	311.44

Source: BetaFPV drawing and bench table

Inside the motor

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

Bell. Grey, with orange on the three spokes of the top and a thin orange ring round the side. Four M2 prop holes on a 5 mm circle. (BetaFPV product page)
Shaft. 1.5 mm, standing 2 mm above the bell. (BetaFPV product page)
Base. Grey with an orange edge; four M2 holes on a 12 mm circle. (BetaFPV product page)
Leads. Three 24 AWG wires, 80 mm or 34 mm long. (BetaFPV product page)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 4200KV 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	62,160	7,252 Hz	43,512
4S full	16.8	70,560	8,232 Hz	49,392
6S nominal	22.2	93,240	10,878 Hz	65,268
6S full	25.2	105,840	12,348 Hz	74,088

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 BetaFPV’s published sizes: the 15 × 6 mm stator, 20 mm bell, 14.8 mm height, 1.5 mm shaft and 12 mm mounting circle. Anything BetaFPV 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

BETAFPV: LAVA Series 1506 4200KV Brushless Motors (product page). Retrieved Oct 19, 2026.
BETAFPV: LAVA 1506 4200KV outline drawing and load performance table at 16 V (image on the product page). Retrieved Oct 19, 2026.
BETAFPV: LAVA 1506 main product photo, used for finish. Retrieved Oct 19, 2026.