Cranfield Aerospace (CAeS) is an EASA and MOD approved organisation based in the UK and has the authority to design, build and manufacture modifications (minor and major) for both military and commercial aircraft.

We have many years of experience working closely with our customers - from initial requirements capture to aircraft survey, through to design and certification of bespoke modifications.

We can also provide bespoke flying services and utilise our own hangar facilities under our Part 145 Maintenance Organisation approvals, to provide installation services, maintenance and ongoing support.

CAeS is proud to bring this expertise to the world of historic aircraft.  We have supported the Battle of Britain Memorial Flight since 1985 and have recently undertaken other work for the Army and Navy Historic Flights.

Utilising our EASA/CAA and MOD approvals we provide a complete range of design services from our operational base as Cranfield, with the option to co-locate resource to our customer premises both within the UK and overseas.

All of the services we provide are based on the best innovation in the industry and provide bespoke solutions for both our civil and military customers. Services provided include:

  • Operational flying services with new technology sensor systems
  • Flight Trials, instrumentation and data analysis
  • Independent safety assessment and evaluation
  • Risk assessment and safety cases for airborne systems
  • Bespoke aircraft conversion and field campaigns
  • Certification clearance and release to service (RTS)
  • Obsolescence management programmes
  • Requirements capture and concept design definition
  • Resource support to customer approvals / accreditation
  • Form 100A and Form 100C certificates of design
  • Validation and verification programmes
  • Technical audit support for software systems
  • Production of service bulletins (SBs) and STCs (Supplementary Type Certificates)
  • Compliance support for mandatory modifications
  • New airborne concept development
  • Colocated consultancy support
  • Airworthiness services

The benefits of utilising Cranfield Aerospace can be summarised as follows:

  • Well established reputation for quality and delivery
  • CAeS is a fully approved organisation – MOD DAOS, CAA, EASA.
  • We tailor the service provided to meet your needs
  • We offer an affordable service
  • We are well known for being highly responsive and quick to deliver
  • We can offer firm prices and stick to them
  • We provide comprehensive programme management using Prince 2 principles
  • We are used to risk/revenue sharing partnerships

Recent works include:


  • Introduction of mandatory modifications
  • ACAS / TCAS / TCAS II enhanced mode ‘S’, 833kHz Radios
  • SATCOM installations
  • Complete aircraft conversion for specialist roles
  • RVSM solutions for air separation compliance
  • GNS-XLS solutions for commuter aircraft
  • Mast docking system for Airship
  • Range extension for executive travel
  • Atmospheric Research Aircraft (ARA) – specialist instrumentation installations
  • Defensive aids and countermeasures
  • Met Office Civil Contingency Aircraft (MOCCA)


  • New aircraft concepts for DSTL
  • Advanced data logging technology for fast jets
  • Cockpit armour solutions
  • UOR conversions for deployment in theatre
  • Certification approval for spy plane deployment
  • Surrogate UAV conversions
  • Role change certification
  • Range extension
  • Cabin air conditioning
  • Specialist pods and turret systems
  • SATCOM solutions
  • Astra Hawk simulation development


Design Approved Organisation Scheme for the following, under contract with the Ministry of Defence:

  1. Modification to, and experimental and special installations in aeroplanes, rotorcraft and unmanned aircraft.
  2. Experimental flight control systems, components and instruments.
  3. Airborne towing systems.
  4. Structural clearance of airborne electronic equipment.

Quality Approvals/Accreditations

  1. Certification to ISO 9001: 2008.
  2. Assessed in accordance with the requirements of SBAC/ASCS.
  3. Development of software to the guidelines of ISO 9000-3.


  1. EASA Part 21 DOA & POA for EASA Aircraft.
  2. Design and Production Approvals for non-EASA aircraft under CAA.
  3. Control of flights under ‘B’ Conditions for non-EASA/UK registered aircraft.
  4. Part-145 approval which includes recommendations for the renewal of Certificates of Airworthiness.

AvP67 Flying Operations

  1. To carry out research, experimental, development, production and post-maintenance flight tests, training support and task flying.

Cranfield Aerospace Solutions (CAeS) have experience in designing and catering for a multitude of aircraft interior configurations and, the provision of a Layout Of Passenger Accommodation (LOPA) diagram in support. This is not just limited to the location of passenger seats, it covers all seating, emergency equipment, galleys, lavatories and exits. It also covers the interior design and certification of the interior components and the installation, including any need to relocate equipment.  When an interior configuration is required an Supplemental Type Certificate (STC) would need to be issued to enable the implementation and a Safety Equipment Drawing (SED) would be included.  The CAeS detailed LOPA drawings identifying exact position of each seat and item of equipment can also be submitted as part of the Modification package to the Regulatory Aviation Authority for approval.

Cranfield Aerospace Solutions Ltd (CAeS) have the capability 
to conduct full Flutter analysis.  Flutter is a dangerous phenomenon encountered in flexible structures subjected to aerodynamic forces and occurs as a result of interactions between stiffness, aerodynamics and inertial forces on a structure.  As the wind-speed increases, there may come a point where the structural damping is insufficient to damp out the motions which are increasing due to aerodynamic effects on the structure.

This vibration can cause structural failure and therefore accounting for flutter characteristics is an essential. The instability is due to the interaction between aerodynamic, inertial, and elastic forces and when these three forces are modelled, the flutter problem is often solved at all prescribed air speeds. The results include the damping and associated frequencies of each mode shape at each airspeed. When the damping of one of these modes becomes positive, the first flutter speed has been found

The Flutter studies of interactions among aerodynamic, elastic, and inertial forces is falls within Dynamic Aeroelasticity




To find out more, click the link to get in touch

Contact Us

Cranfield Aerospace


Visit Site

Cranfield Aerospace


Visit Site

Cranfield Aerospace


Visit Site

Cranfield Aerospace


Visit Site