They can be used for testing experimental aircraft or modifications, pre-delivery flights for foreign customers and are sometimes referred to as "B" class markings.
They are sometimes refered to as "B" class markings. They can be used for testing experimental aircraft or modifications, pre-delivery flights for foreign customers.
They can be used for testing experimental aircraft or modifications, pre-delivery flights for foreign customers. They are sometimes refered to as "B" class markings.
They can be used for testing experimental aircraft or modifications, pre-delivery flights for foreign customers. They are sometimes refered to as "B" class markings.