Aircraft/Helicopter Tachometer Calibration Systems
![imageb](https://qdflow.com/wp-content/uploads/2019/01/IMAGE_B-300x219.jpg)
![Aircraft1](https://qdflow.com/wp-content/uploads/2019/01/aircraftInFlight-300x219.jpg)
![Helicopter](https://qdflow.com/wp-content/uploads/2019/01/heliOne-300x201.jpg)
The introduction and popularity of original general purpose N-11-E tachometer calibration systems prompted numerous requests from the aviation industry for a
version specifically configured for the calibration/test of aircraft/helicopter tachometers. To meet these requirements, the original N-11-F aircraft/helicopter
tachometer calibrator, NSN 6680-00-403-5991, was introduced to drive the aircraft tachometer generator.
Since the aircraft/helicopter tachometer system consists of both the tachometer generator and cockpit indicator, the CA-11-F cockpit tachometer calibrator, NSN 4910-01-318-1469, was subsequently introduced to test the cockpit indicator independently. The unit is also used for the calibration of auto-throttling systems.
The third generation NCA-11-FCS/3C, NSN 6620-01-266-5545, unites the ability to calibrate and test both the tachometer generator and indicator into a single unit, making it the de-facto standard system for the aviation industry.
The NCA-11-FCS/3C has been standardized by U.S. and NATO air forces, aircraft manufacturers, all major airlines, and aircraft overhaul facilities.
![NCA-11-FCS/3C NSN 6620-01-266-5545 NCA-11-FCS/3C](https://qdflow.com/wp-content/uploads/2019/01/FCS1-300x212.jpg)
NCA-11-FCS/3C NSN 6620-01-266-5545
![N-11-FCS/3A NSN 6680-00-403-5991 N11FCS3A](https://qdflow.com/wp-content/uploads/2019/01/FCS3A_1A-300x199.jpg)
N-11-FCS/3A NSN 6680-00-403-5991
![CA-11-FCS NSN 4910-01-318-1469 CA11FCS](https://qdflow.com/wp-content/uploads/2019/01/CA11FCS_1-300x228.jpg)