Aircraft engine pylon to wing mounting assembly
Pylon mounting assemblies are provided for mounting an engine (e.g., a turbojet engine) to a wing of an aircraft. The pylon mounting assemblies include an upper pylon connection member, and a lower pylon connection box, wherein the upper pylon connection member and the lower pylon connection box respectively include multiple opposed pairs of connection lobes. At least one pair of the connection lobes includes a pin connection to restrict degrees of freedom thereat along an x-axis and a mutually perpendicular z-axis, while at least one other pair of connection lobes includes a connection rod to restrict degrees of freedom thereat along the z-axis.
1. An aircraft wing assembly comprising an aircraft wing having leading and trailing edges and a pylon mounting assembly for mounting an engine to the aircraft wing, wherein the pylon mounting assembly comprises:
an upper pylon connection member which extends forwardly of the leading edge of the aircraft wing relative to an aircraft travel direction, and
a lower pylon connection box having an elongate axis along the aircraft travel direction, wherein
the upper pylon connection member and the lower pylon connection box respectively include at least opposed forward and rearward pairs of upper and lower connection lobes, respectively, each being aligned with the elongate axis of the lower pylon connection box; and wherein
the upper forward connection lobe of the upper pylon connection member is positioned at and extends forwardly of a terminal end of the upper pylon connection member; and wherein
the lower forward connection lobe of the lower pylon connection member extends upwardly from the lower pylon connection member; and wherein
at least a first one of the forward and rearward pairs of connection lobes includes a pin connection to restrict degrees of freedom thereat along an x-axis and a mutually perpendicular z-axis, and wherein
at least a second one of the forward and rearward pairs of connection lobes includes a connection rod to restrict degrees of freedom thereat along the z-axis, wherein
each of the pin connection and the connection rod comprises a fuse pin capable of rupturing and breaking away in response to a separatory force exceeding a nominal design force to thereby allow separation of the lower pylon connection box from the upper pylon connection member.
2. The aircraft wing assembly as in claim 1 , wherein the upper pylon connection member is a solid structure connected rigidly to a wing box of the aircraft wing.
3. The aircraft wing assembly as in claim 2 , wherein the forward connection lobe of the upper pylon connection member extends forwardly of and is downwardly dog-legged relative to the leading edge of the aircraft wing.
4. The aircraft wing assembly as in claim 1 , with wherein the multiple opposed pairs of connection lobes includes forward, intermediate and rearward pairs of connection lobes.
5. The aircraft wing assembly as in claim 1 , wherein the forward and rearward pairs of connection lobes include respective connection rods to restrict degrees of freedom thereat along the z-axis, and the intermediate pair of connection lobes includes a pin connection to restrict degrees of freedom thereat along the x-axis and the mutually perpendicular z-axis.
6. The aircraft wing assembly as in claim 1 , wherein the intermediate and rearward pairs of connection lobes include respective connection rods to restrict degrees of freedom thereat along the z-axis, and the forward pair of connection lobes includes a pin connection to restrict degrees of freedom thereat along the x-axis and the mutually perpendicular z-axis.
7. The aircraft wing assembly as in claim 6 , wherein the forward connection lobe of the upper pylon connection member extends forwardly of and is downwardly dog-legged relative to the leading edge of the aircraft wing.
8. The aircraft wing assembly as in claim 1 , wherein the forward and intermediate pairs of connection lobes include respective pin connections to restrict degrees of freedom thereat along the x-axis and the mutually perpendicular z-axis, and wherein rearward pair of connection lobes includes a connection rod to restrict degrees of freedom thereat along the z-axis.
9. The aircraft wing assembly as in claim 8 , wherein the forward connection lobe of the upper pylon connection member extends forwardly of and is downwardly dog-legged relative to the leading edge of the aircraft wing.
10. An aircraft comprising the aircraft wing assembly as in claim 1 .