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AAE Aerospace, located in Brampton, Ontario, has 65 years of experience in the design, manufacture, repair & overhaul, and distribution of components for aircraft, naval ships, and ground support equipment. AAE uses a Cotta gearbox on their in-house stands used for testing aircraft generators, typically 60kVA to 90kVA. The gearbox has been extremely efficient, running for over 25 years without a major breakdown.

Some of the required design specifications for AAE’s gearbox included:

  • Unit to be designed for bi-rotational rotation
  • High speed shaft torque to not exceed 31500 RPM
  • Continuous rating of 350 HP at 30,000 RPM
  • Maximum acceleration to not exceed 700 RPM per second
  • Oil temperature must be 90 deg F before reaching 6500 RPM
  • After reaching 6500 RPM, increase speed by 1000 RPM every 20 seconds until 12000 RPM is reached
  • After proper start-up procedure, maximum acceleration/deceleration rate to not exceed 4400 RPM per second

AAE’s Engineering Manager, Mark DeRoia, reflected on AAE’s relationship with Cotta Transmission.  He stated, “When we’ve ever needed a part or reported a service issue, Cotta is always responsive and meets our need within a week. They have a good, very consistent group of people there. We may need to install another test stand in the future. So, when we need a new high-speed gearbox, Cotta is who we’ll call.” Mark further stated, “AAE has specific requirements for stringent applications, like for running an F-18 aircraft generator at 26,000 RPM, and we can rely on high-quality results from their product.”

For over 50 years, Cotta has designed and manufactured a diverse line of high-speed gearboxes that are used by some of the largest OEM companies in the world for numerous R&D and production test stand applications for automotive, aerospace, and industrial components.  Cotta’s high-speed gearboxes are also applicable for speed management in non-aviation, industrial applications – from turbine reduction gears to centrifugal driers, to numerous other instances where a highly specialized, powerful, and reliable solution is needed.

VISIT:  AAE

QUICK LINKS:

High-Speed Gearboxes Catalog

View Complete Library of Product Specification Sheets

High-Speed Gearbox Application Data Form

Cotta has another high-speed gearbox in process for a test stand application that will be used in the aerospace industry. The housing for this gearbox is currently being machined on Cotta’s Milltronics HBM110XT.  The machine is ideal for this type of part, as it provides a large working table that can handle the heavy duty load capacity.

Gearbox Ratios, Torques & Speeds:

  • Ratios 1 : 8.36
  • Max Torque: 855 in-lb @ 27,239 RPM
  • Max Speed: 29,963 RPM

Low Speed Fuel Pump:

  • 1 : 2.61
  • Max Torque: 1,456 in lb @ 8,525 RPM
  • Max Speed 9,378 RPM

Main Fuel Pump: 

  • 1 : 11.00
  • Max Torque: 486 in lb @ 34,900 RPM
  • Max Speed: 38,390 RPM

Approximate Weight: 1,619 lbs

Cotta has designed and manufactured a diverse line of high-speed gearboxes that are used by some of the largest OEM companies in the world for numerous R&D and production test stand applications for automotive, aerospace, and industrial components.

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Milltronics HBM110xt