Separable clamped HDRM interface for managing torsion loads

A method for mounting a first spacecraft to an adjacent structure of a launch vehicle or of a second spacecraft using a singular or plurality of Hold Down Release Mechanism (HDRM) interfaces forming part of a single-point or multi-point attachment of the first spacecraft to said adjacent structure, the method comprising:

• providing a singular or plurality of HDRM interfaces, each having a first connector part having a tapered projection with a non-circular external surface in a plane perpendicular to a release direction of the singular or plurality of HDRM interfaces and a central through-hole, and a second connector part having a matching formed tapered recess with a non-circular interior surface configured for form-lockingly receiving the tapered projection, for enabling transfer of at least torsion load and shear load between the first and second connector parts, when the tapered projection is inserted in the tapered recess and the first and second connector parts are pressed together, wherein the tapered projection of the first connector part has the shape of a truncated or non-truncated substantially triangular pyramid, and the tapered recess of the second connector part has the shape of a truncated or non-truncated inverse substantially triangular pyramid, wherein an exterior outline of a cross-section of the tapered projection of the first connector part, in a plane perpendicular to a release direction of the HDRM interface, has three substantially straight lateral sides with substantially equal length, and wherein also the second connector part has central through-hole;
• providing a singular or plurality of release bolts and inserting a release bolt through the central through hole of the first and second connector parts of each of the singular or plurality of HDRM interfaces and clamping the first and second connector parts together by means of said release bolt to form a singular or plurality of assembled HDRM interfaces;
• and
• attaching one of the first and second connector parts of the singular or plurality of HDRM interfaces to said adjacent structure and attaching the first spacecraft to the other of the first and second connector parts of the singular or plurality of HDRM interfaces.