HELIOS 72 · Interactive Planetary Gear Drive

MYSIMULATOR / ENGINEERING ATLAS

HELIOS 72

Inside a precision epicyclic transmission. Three interlocking rotational systems, one elegant mechanical constraint.

MODEL 958442 · 98,804 TRIANGLES

20° INVOLUTE · MOD 7.5 mm
GLB / PBR / 289 COMPONENTS

DRAG TO ORBIT · WHEEL TO ZOOM · SELECT MODE TO CHANGE REACTION ELEMENT

Assembling gearbox…

KINEMATIC LAB / 01SIMULATION RUNNING

Planetary transmission

Live epicyclic gear-speed solver, based on actual tooth counts.

Constraint / reaction mode

Input speed 90 RPM

Sun / 24T

RPM

Ring / 48T

RPM

Carrier

RPM

Planet / abs.

−90

RPM

3.00 : 1 reductionThe held ring provides the reaction torque. The carrier turns at one-third of the sun speed.

Engineering exploded view 0%

Show sectioned metal housing

Willis equation
24(ωsun − ωcarrier) + 48(ωring − ωcarrier) = 0
Planet speed relative to carrier = −2 × (ωsun − ωcarrier).

Physics is ideal rigid-gear kinematics. No friction, compliance, or bearing load model. Educational exhibit; not a certified gear design.