Moment of Inertia (moi) Measurement Instruments | Raptor

Aircraft Control Surface for MOI Testing

raptorscientific — Mon, 21 Sep 2020 21:50:00 +0000

This instrument is a gravity-driven pendulum system for moment-of inertia-measurement of control surfaces up to 500 lb / 225 kg. Moment of Inertia test equipment is important to measure the MOI of an aircraft control surface to ensure that the maximum MOI about the hinge line does not exceed pre-established limits. This is to better predict and reduce the likelihood of flutter and divergence characteristics.

The Control Surface MOI Instrument suspends the test article in a horizontal orientation to create a gravity-driven pendulum. The pendulum oscillation is initiated manually. The frequency of oscillation and damping coefficient are measured, and forces are recorded using a high-accuracy force transducer to measure control surface Center of Gravity. Inertia is derived from the oscillation period, the mass of the control surface, and CG offset distance. Measured MOI is accurate to ±3%.

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XKR Moment of Inertia Small-Payload

raptorscientific — Mon, 21 Sep 2020 21:46:34 +0000

The XKR moment of inertia measurement instruments are extremely accurate moment of inertia measurement instruments. The XKR offers measurement accuracies better than 0.1% for objects weighing a few grams up to 5 lb (2.3 kg). Dedicated to small payloads, XKR series will measure parts as small as the balance wheel of a watch (1 x 10^-6 lb-in² minimum). Payloads weighing up to 5 lb can be measured with these instruments.

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GB High-Accuracy Moment of Inertia Series

raptorscientific — Mon, 21 Sep 2020 21:40:00 +0000

Gas bearing-supported table for objects up to 8,800 lb / 4,000 kg with 0.1% accuracy. The GB series Moment of Inertia (MOI) measurement instruments are designed to measure large mechanical components such as re-entry vehicles, spacecraft, automobile engine parts, and complex structures.

Standard models are available for measurement of test objects weighing up to 15,000 pounds (6,800Kg) with an accuracy of +/-0.1 percent. In addition to their use as a design tool, these instruments are fast enough for use on production lines for manufacturing quality analysis.

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XR Moment of Inertia Production Series

raptorscientific — Mon, 21 Sep 2020 21:36:30 +0000

General-purpose instrument for objects up to 250 lb / 120 kg. The XR series is designed for testing Moment of Inertia (MOI) over a wide range of test part weight.

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