The VEGA Launch Vehicle is offered in its standard configuration with three different types of Payload adapters. The adaptors PLA 937 and PLA 1194 – the numbers indicate the coupling diameter in millimeters to Payload – are proposed for single launches while a model so called VESPA (VEga Secondary Payload Adapter ) is proposed for the multiple launches.
The Payload Adapter is a technologically advanced structural element, in fact regardless its low mass it can transmit important flight loads granting at the same time the overall stiffness of the launch vehicle.
The Payload adaptor includes the Payload separation system. The Payload separation is executed by means of a pyrotechnical bolt cutter system that, upon reception of a command generated by the on board computer when the target orbital conditions are achieved, cuts the junction element between the Launch Vehicle and the Payload. The Payload is then pushed away with the necessary energy by a spring system. The spring system to cope with different Payloads’ Mass classes, Payloads can range from 300 to 2500 Kg – can be settled to provide different pushing force levels as required by the specific Payload.