Overview

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Features

• See G, tilt, altitude trend, and balance — not just G force
• A G-Mmeter is useful because it helps show what the aircraft, vehicle, and occupants are experiencing. The Radiant G-Meter expands that idea by adding multiple visual modes that help you understand motion, bumps, bank/tilt, climb/descent trends, and lateral balance from one small instrument.
• Use it to review maneuver loads, compare roughness between surfaces or routes, observe roll and pitch trends, or simply add a fun, informative motion-awareness display to an experimental aircraft, ultralight, LSA, off-road vehicle, shop test setup, or other appropriate application.
• Eight selectable display views
• 1. 8G-METER
• A wide-range vertical-G strip chart with a ±8 G scale. This view keeps MAX, MIN, NOW, and TMP visible, making it useful for sustained-G and maneuver-history awareness.
• 2. HARSH
• A high-resolution ride-harshness view designed to make small bumps, jolts, and vibrations easier to see. It uses a ±2 G scale around a +1 G baseline and displays RMAX, PMAX, PEAK, and TMP.
• 3. Dial
• A classic round G-Meter display from -2 G to +5 G. The dial includes a persistent needle-tip trail, so you can see where the G value has recently been during the current dial-view session.
• 4. TILT
• A roll/pitch cross display for quick attitude and tilt awareness. Roll and pitch are shown across a displayed ±45° range with advisory caution and danger zones.
• 5. ±250 FT altitude trend
• A fine-scale barometric altitude graph for local climb/descent detail and small terrain changes.
• 6. ±1000 FT altitude trend
• A medium-scale barometric altitude graph for general terrain, pattern-size altitude trends, and broader climb/descent awareness.
• 7. ±2000 FT altitude trend
• A wide-scale barometric altitude graph for larger altitude changes and longer climbs or descents.
• 8. Inclinometer
• A ball-in-bowl lateral-balance display derived from the accelerometer. This view is intended for slip/skid or lateral-balance awareness, not as a turn coordinator or primary flight instrument.
• Simple two-button operation
• The G-Meter uses two front buttons and a clear bottom-screen status strip.
• Press Right to step through the eight views.
• Press Left to toggle bright/dim.
• Hold Left to toggle normal / Paper-inverse screen mode.
• Press Both to set the current barometric altitude as the ALT zero reference.
• Hold Right for context-sensitive actions such as resetting peaks or calibrating the inclinometer / lateral zero, depending on the active view.
• The bottom strip shows battery voltage, firmware revision, the eight-position view index, button labels, and active view captions where applicable.
• G tracking and peak history
• The G-Meter displays current G, maximum positive G, and minimum negative G in the 8G-METER and Dial views. Other views can show peak roll angle, peak pitch angle, peak absolute G, and altitude change relative to the user-set reference.
• Warning colors and caution/danger zones are advisory display cues only. They are not aircraft, vehicle, or mount structural-limit indicators.
• Tilt, pitch, roll, and inclinometer awareness
• The TILT view shows roll and pitch in a cross-style display. The Inclinometer view provides a ball-in-bowl display for lateral-balance awareness. After changing mounting orientation, the user can recalibrate the inclinometer / lateral zero so the display matches the new installation reference.
• Barometric altitude trend views
• The G-Meter includes three altitude graph scales: ±250 ft, ±1000 ft, and ±2000 ft. Each graph centers on the current altitude when that view is entered, then plots altitude change over time.
• The ALT value is based on a user-set zero reference. Press both buttons at the desired reference altitude, and the ALT cell will display barometric altitude difference from that session reference.
• Altitude information is advisory only. It is not GPS-derived, terrain-aware, or certified altitude information.
• Included convertible holster
• The new G-Meter includes a convertible clip holster. The holster can be mounted on a flat horizontal surface, such as the top of a dashboard, or on a vertical instrument panel.
• The instrument slides into the holster from the left side and stops against the right side, leaving the left-side power connector and power switch accessible when seated.
• Mounting screws are not included. Use appropriate thin-head #4-40 hardware and verify that screw heads do not interfere with the slide path.

How to Use

• Charge the G Meter before first use with the included Micro-USB charging cable. Install the included holster securely on a suitable flat horizontal surface or vertical panel, then slide the instrument into the holster from the left until seated.
• Use the Right button to move through the eight views. Use the Left button to select bright or dim display. Hold the Left button to switch to Paper / inverse display mode. Press both buttons at the desired reference altitude to set ALT zero for the current session. In the Inclinometer view, hold Right only when the unit is stable and level, or in the desired coordinated reference condition, to store the lateral / roll zero.

Technical Details

• Firmware revision covered: GMA117
• Display: 320 × 240 color LCD
• Physical size: approximately 2.44 × 2.24 × 0.48 inches
• Weight: approximately 46 grams
• Primary motion sensor: solid-state accelerometer, configured for ±8 G range
• Barometric sensor: internal pressure/temperature sensor
• View cycle: 8G-METER, HARSH, Dial, TILT, ±250 ft altitude, ±1000 ft altitude, ±2000 ft altitude, Inclinometer
• G display: current, maximum, and minimum vertical G, displayed to tenths of a G
• G red thresholds: approximately +4.0 G and -2.0 G
• Dial range: -2 G to +5 G
• Harshness chart: ±2 G about a +1 G baseline
• Roll/pitch display range: ±45° displayed range
• Tilt advisory thresholds: roll caution at approximately 25°, roll danger at approximately 35°; pitch caution at approximately 20°, pitch danger at approximately 30°
• Altitude graph scales: ±250 ft, ±1000 ft, ±2000 ft
• Battery: internal single-cell Li-ion battery, nominal 3.7 V
• Charging: Micro-USB charging only; no data transfer
• Operating temperature: -10 °C to +60 °C / 14 °F to 140 °F
• Storage temperature: -20 °C to +70 °C / -4 °F to 158 °F
• Water ingress: water ingress not allowed; no IP rating
• Regulatory status: advisory use only; NOT TSO’d, PMA’d, or NORSEE-approved

Important Advisory Use notice

• The Radiant G-Meter is an advisory instrument ONLY. It is NOT TSO’d, PMA’d, or NORSEE-approved and must not be used as a primary flight instrument, required aircraft instrument, certified altimeter, turn coordinator, or substitute for approved instrumentation.
• For aviation use, it is intended for VFR experimental, ultralight, and Light Sport Aircraft advisory applications where appropriate. For automotive, off-road, backcountry, trail, shop, and test use, it provides advisory information only and does not determine whether terrain, slope, vehicle load, vehicle setup, speed, or operator action is safe.
• Always operate within aircraft, vehicle, and regulatory limits.

Manual and Installation Information