Technology

Three gears, not two

A gear pump moves fuel by changing the volume trapped between the gears and the pump body.

As the gears turn, the volume on the disengaging side grows, creating a vacuum that draws fuel in; on the meshing side it shrinks and pushes fuel into the line. The mesh line separates suction from discharge, and outlet pressure is set by the restriction downstream of the pump. Our pumps add a third gear to that head: when a bubble reaches the pump, the extra gear keeps the discharge primed instead of letting the flow collapse — the classic cause of a flameout on a small turbine.

Brushless motor — no brush wear, no sparking
Three-gear head — tolerant of air entrainment
No-leak sealing at rated condition
RP-3 jet fuel, ≥ 70 % fraction

Technical data

Model	Series	Engine class	Flow rate	Outlet pressure	Supply voltage	Mass
ROS-RYB 30	Integrated supply units	6 – 14 kg	≥ 30 L/h	—	3–4S LiPo	120 g
ROS-RYB 50	Integrated supply units	17 – 30 kg	≥ 50 L/h	—	3–4S LiPo	—
ROS-RYB 100	Integrated supply units	60 – 80 kg	120–150 L/h	0.6 MPa	—	300 g
ROS-RYB 75	Universal series	≤ 20 kg	0.76 L/min	0.035 MPa	12 ± 2 V DC	≤ 120 g
ROS-RYB 120	Universal series	≤ 30 kg	1.29 L/min	0.069 MPa	12 ± 2 V DC	≤ 120 g
ROS-RYB 135	Universal series	≤ 30 kg	1.51 L/min	0.083 MPa	12 ± 2 V DC	≤ 120 g
ROS-RYB 182	Universal series	≤ 40 kg	1.82 L/min	0.123 MPa	12 ± 2 V DC	≤ 300 g
ROS-RYB 215	Universal series	≤ 50 kg	2.16 L/min	0.166 MPa	20 ± 2 V DC	≤ 120 g
ROS-RYB 320	Universal series	≤ 60 kg	> 3.2 L/min	0.166 MPa	12 ± 2 V DC (10–48 V regulated)	≤ 150.5 g
ROS-RYB 120 (28 V)	Custom 28 V series	—	≥ 120 L/h	0.6 MPa max outlet	28 ± 4 V DC	≤ 400 g (bare)
ROS-RYB 220	Custom 28 V series	—	≥ 250 L/h	1.0 MPa max outlet (0.9 MPa variant available)	28 ± 4 V DC	≤ 400 g bare · ≤ 500 g with connector
ROS-RYB 290	Custom 28 V series	—	≥ 290 L/h	1.0 MPa max outlet	28 ± 4 V DC	≤ 430 g (bare)

All figures are minimum guaranteed values unless stated otherwise.