DeryckZA
Member
I am looking for a good way of mounting a retractable undercarriage into a composite wing. Imagine a conventional low wing retractable gear. The steel gear terminates in a near horizontal tube about 0.5" diameter. The steel tube then fits into 2 spherical bearings, one at each end of the tube. For example spherical bearing LS-8, bore=.5"
Imagine the tube is almost parallel to the wing rib in the direction of flight.
I've been told it's a bad idea to fix the bearings too close to the main spar and second spar because the vibration, twisting and tension needs flexing, mustn't be too rigid. The bearings must be attached with a lot of strength, obviously, but must also have some flexure to allow for the heavy impact loads on the bearings and steel undercarriage.
Any ideas, a sketch or cad sketch would be nice, and some basic design calculations would be useful. Does anyone know of a kit which has solved this problem? Not Lancair IV because their gear retracts into the fuselage like a C210. I was thinking more of a composite version of a BE A36, a Mooney M20, or a Piper Arrow.
Thank-you
Imagine the tube is almost parallel to the wing rib in the direction of flight.
I've been told it's a bad idea to fix the bearings too close to the main spar and second spar because the vibration, twisting and tension needs flexing, mustn't be too rigid. The bearings must be attached with a lot of strength, obviously, but must also have some flexure to allow for the heavy impact loads on the bearings and steel undercarriage.
Any ideas, a sketch or cad sketch would be nice, and some basic design calculations would be useful. Does anyone know of a kit which has solved this problem? Not Lancair IV because their gear retracts into the fuselage like a C210. I was thinking more of a composite version of a BE A36, a Mooney M20, or a Piper Arrow.
Thank-you
