The museum team brought the battery charger unit to our facility in Lincoln, where we could carry out servicing and testing. It was originally manufactured by Richmond Electronics, a company which Castlet acquired in 1985 when it expanded into the MOD and aerospace markets.

During their visit, our team gifted them a Nimrod Armament Test Set (a prototype designed and built in 2009 to test functionality of the weapon stations of the now-retired Nimrod aircraft programme, including data upload, storage and weapons release) and a Mk.9 Ventilator Respirator, to take back to their collection, whilst we carried out the work.

Our engineers first stripped the unit from its case and cleaned both components thoroughly. They discovered the charger had an issue related to blown fuses, so fitted a replacement fuse and conducted detailed electrical connection checks to ensure all terminals and interconnections were secure.

Following the servicing process, two of our site and service test engineers, Thomas Austen and Colin Kirtley, tested the unit with support from our electronics technician, Josh Street. The testing confirmed that, despite the equipment’s age, it remained fully functional, with only minor values close to tolerance due to normal wear over time. No faults were found, a testament to the robust design and manufacturing quality of the original unit.

The testing was carried out using modern calibration standards while respecting the heritage of the design. This careful balance allowed us to preserve the authenticity of the original unit while ensuring it met contemporary safety and performance expectations. 

After a full service and test cycle, the battery charger was successfully restored to working order. Upon returning the unit to Norwich Aviation Museum, our team had the opportunity to climb up into the crew space of The Vulcan – one of the museum’s centrepieces – to learn more about its operating conditions and equipment.

The Vulcan remains a powerful symbol of the RAF’s Cold War history. This particular aircraft had the ability to carry out long-range bombing strikes during conflicts such as the Falklands War. Today, it is on display at the museum where members of the public can learn about its extensive history.

This project not only demonstrated our capability in maintaining and calibrating legacy aerospace systems but also reflected our commitment to supporting the preservation of British aviation history. The project was carried out free of charge in support of the museum, which operates as a charity. Castlet’s Nimrod Armament Test Set is now on display in the museum for future generations to see and admire.