SPERRY 674174 Directional Gyro Electric Gyroscope

( Brand: Sperry ), ( Manufacturer Part Number: 674174 ), ( Part Type: Gyroscope ), ( Country Of Origin: United States )

Review SPERRY Us Navy Directional Gyro Electric By Gyroscope No fits PT

The Sperry 674174 Directional Gyro, also known as an electric gyroscope, is a sophisticated navigational instrument designed to provide accurate heading information for aircraft or other moving platforms. This gyroscope, manufactured by Sperry Marine, a leading name in navigation and automation systems, is a vital component of a larger navigation system, working in conjunction with other instruments such as magnetic compasses and attitude indicators.

The Sperry 674174 Directional Gyro is an electrically driven gyroscope, which means it utilizes an electric motor to rotate the gyroscope's spinning wheel or rotor. This design offers several advantages over mechanically driven gyroscopes, such as improved reliability, lower maintenance requirements, and greater resistance to shock and vibration.

The gyroscope housing is constructed from rugged materials, ensuring durability and resistance to harsh environmental conditions. Its dimensions are approximately 15 inches (38.1 cm) in length, 9 inches (22.9 cm) in width, and 7 inches (17.8 cm) in height, making it a compact yet powerful navigational tool.

The gyroscope's rotor is a high-precision, low-friction component made of a lightweight, corrosion-resistant material such as aluminum. The rotor is supported by precision ball bearings, ensuring smooth and stable rotation. The rotor is also equipped with a fine-tuned damping system that helps maintain stability and accuracy.

The Sperry 674174 Directional Gyro features a built-in electronic output system, which converts the gyroscope's mechanical output into a usable electrical signal. This signal can be transmitted directly to flight instruments, such as a heading indicator, or to a central flight computer for further processing.

The gyroscope is designed to operate over a wide temperature range, ensuring it remains accurate in various environmental conditions. It also features a built-in heating system to maintain optimal operating temperature, even in cold environments.

The Sperry 674174 Directional Gyro is a sophisticated navigational instrument that provides accurate heading information, helping ensure the safety and efficiency of aircraft or other moving platforms. Its rugged design, compact size, and advanced electronic output system make it an essential component of modern navigation systems.

Sperry's 674174 Directional Gyro (DG) is an electric gyroscope used primarily in aircraft for attitude and heading indication. Here are some pros and cons of buying this gyroscope:

1. High Precision: The Sperry 674174 DG provides accurate and reliable heading and attitude information, which is crucial for safe and efficient flight operations.

2. Robust Design: The gyroscope is built to withstand harsh environmental conditions, making it suitable for use in various aircraft applications.

3. Low Power Consumption: The electric gyroscope consumes less power compared to its mechanical counterparts, which can help extend battery life in some aircraft applications.

4. Easy Installation: The gyroscope is relatively easy to install and integrate into existing aircraft systems, which can save time and resources.

5. Long Service Life: The gyroscope has a long service life, which can help reduce maintenance costs and downtime.

1. High Cost: The Sperry 674174 DG is a high-performance gyroscope, and its cost may be prohibitive for some aircraft operators.

2. Complexity: The gyroscope is a complex piece of equipment, and its installation and maintenance require specialized knowledge and expertise.

3. Sensitivity to Vibrations: The gyroscope is sensitive to vibrations, which can affect its accuracy and performance. Proper vibration isolation is essential for optimal performance.

4. Calibration Requirements: The gyroscope requires periodic calibration to maintain its accuracy, which can be time-consuming and costly.

In conclusion, the Sperry 674174 Directional Gyro is a high-performance, robust, and precise gyroscope that offers several benefits, including easy installation, long service life, and low power consumption. However, its high cost, complexity, sensitivity to vibrations, and calibration requirements may be drawbacks for some aircraft operators. Ultimately, the decision to purchase this gyroscope depends on the specific requirements and budget of the aircraft operator.

If the aircraft operator values high precision, robustness, and ease of installation, the Sperry 674174 DG may be a worthwhile investment. However, if the operator has limited resources or if the aircraft does not require the highest level of heading and attitude accuracy, other options may be more cost-effective. In such cases, a mechanical gyroscope or a less expensive electronic gyroscope may be a better choice.

Details:

Appears to be complete. US Navy Directional Gyro, Brand: Sperry. Please review pictures. Part ID 674174.

Repair tag suggests out of use in 1986.

part #: 674174 price

• $199.95

specifications aviationpar:

• for models: Pt
• brand: Sperry
• mpn: 674174
• part type: Gyroscope
• country of origin: United States

shipping aviationpar:

• transit: 4-8 Days
• carrier: FedEx
• type: Calculated
• cost: $12.08
• class: Economy
• service: FedEx Ground Economy

seller aviationpar:

• rating: 100.0%
• city: Myrtle Beach, South Carolina
• # reviews: 4348

general aviationpar:

• condition: For parts or not working
• Parts Accessories > Aviation Parts Accessories > Parts

offer aviationpar:

• sold: 0
• best offers: True
• options: Ship-to-home
• quantity: 1
• availability: In Stock
• started: February 26, 2026

returns aviationpar:

• policy: No Returns

payments aviationpar:

• other
• credit card: Diners-club
• wallet: Google-pay

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