Builder fit checks

Compatibility checkup

Rotor Genie is not a spec table with vibes sprinkled on top. It checks what can plug into what, what must be configured, and what might let the smoke out.

1. Part facts

Rotor Genie tracks dimensions, pads, connectors, rails, protocols, firmware targets, and confidence notes that matter at the bench.

2. Fit filters

Filter by mount pattern, cell range, KV, prop diameter, UART count, connector family, and video system before you fall in love with the wrong part.

3. Build warnings

Warnings explain severity, builder impact, fixes, manual checks, and what the choice means for wiring and setup.

4. Build comparison

Active selections and alternates stay together so builders can compare candidates without losing the plan.

5. Wiring plan

Pad assignments, UART reservations, rail budgets, and smoke-stopper checks keep the soldering plan honest.

6. First-boot setup

Betaflight guidance follows the chosen receiver, video gear, GPS, modes, motor protocol, and safety checks.

Checks available now

Build Lab keeps the active build on this device and scores frame/FC/ESC/motor/prop/battery fit.
Fit checks cover mount fit, motor/frame fit, motor/prop mount, frame/prop clearance, ESC voltage range, connector mismatch, rough current headroom, bidirectional DShot support, power index, and explicit Unknown data gaps.
Check coverage: 7 ready checks, 11 review-first checks, 0 researched watch items.

Test the Build Lab

Common mistakes Rotor Genie checks

These checks turn common build mistakes into plain-English warnings before a builder buys the wrong part or plugs in the wrong pad.

FC stack mount does not fit the frame

Ready check

Frame stack holes must intersect the FC/AIO mounting standard before wiring or setup can be trusted.

frame.fc.mount_pattern_mismatch

ESC stack mount does not fit the frame

Ready check

ESC/4-in-1 board mounting pattern must fit the selected frame stack bay.

frame.esc.mount_pattern_mismatch

Motor mount does not fit the frame arms

Review-first check

Motor screw pattern, screw size, and arm-tip geometry must match the frame.

frame.motor.mount_pattern_mismatch

Prop is too large for the frame

Ready check

Prop swept disc must fit the frame/duct clearance before motor testing or wiring routing.

frame.prop.clearance_exceeded

Prop mount does not match the motor

Review-first check

Prop mount type, bore, T-mount spacing, and motor shaft/hub requirements must match.

motor.prop.mount_mismatch

Battery voltage exceeds ESC limit

Ready check

Battery S count/full-charge voltage must be inside ESC/stack input limits.

esc.input.voltage_over_limit

Battery voltage exceeds motor guidance

Ready check

Battery S count should stay inside the motor manufacturer cell-count guidance before prop/load estimates are trusted.

motor.input.voltage_over_guidance

Battery voltage is below motor guidance

Ready check

A pack below the motor voltage guidance can produce a weak or non-representative setup even when it is electrically safe.

motor.input.voltage_under_guidance

Battery connector needs adapter or pigtail change

Review-first check

Main battery connector should match the ESC/pigtail connector and current class.

battery.connector.mismatch

ESC current headroom may be too low

Review-first check

ESC continuous current should exceed estimated motor/prop/battery load with thermal margin.

esc.current_rating.under_motor_load

RPM filtering / bidirectional DShot needs ESC support

Review-first check

Bidirectional DShot/RPM filtering requires ESC firmware support; FC support alone is not enough.

esc.bidir_dshot.enabled_without_esc_support

Too many serial accessories for this FC

Review-first check

Receiver, video control, GPS, and other serial accessories must fit inside the FC UART budget.

fc.uart.budget.over_allocated

Receiver protocol is not listed by the FC

Review-first check

Receiver output protocol must be supported by the FC configuration path.

receiver.protocol.fc_unsupported

Camera and video transmitter do not speak the same video path

Review-first check

Analog cameras need analog VTX gear; digital systems need matching digital-family parts.

video.camera_vtx.ecosystem_mismatch

Accessory load may exceed the FC 5V rail

Review-first check

GPS, buzzer, LEDs, camera, and video gear can exceed the FC 5V regulator budget.

fc.rail.peripheral_load_over_limit

Accessory load leaves little 5V rail margin

Review-first check

Accessory current near the FC rail limit should be treated as a reliability warning.

fc.rail.peripheral_load_tight

Critical compatibility facts are still unknown

Ready check

Unknown fit facts should stay explicit and should reduce confidence rather than being treated as safe.

data.critical_field_unknown

Accessory facts are still unknown

Review-first check

Low-confidence accessory facts should stay visible before they drive wiring or Betaflight output.

data.peripheral_field_unknown