By looking on
Isambard's Lad | The sun shines out of the Engineers I see three axles / drive shafts and a virtual rotor mast discontinuous (fr. discontinue), meaning four machine elements one upon the other,
- don’t see any continuous (fr. continue) rotor mast,
- don’t see it’s axial and radial bearing at bottom / sump of MRGB,
- don’t see its upper bearing in the conical housing,
- and see only a bevel gear and two epicyclic modules,
- which are worst ‘axial and radial bearings' to prevent disalignment..
AW009, thank you for explaining you view, but I'm a little disappointed by its support (a very simplified block diagram).
Is there a real (reliability) matter with a discontinuous rotor mast as you say ?
The mast is held in position by a double conical bearing mounted in O at the top of the conical housing, and by the contact of the teeth of the second stage planet carrier.
By the facts, we can say with relative confidence that the mast design and holding is not the issue and has proved its reliability on others H/C.
I don't think that hyperstatism ever did well with the wear resistance ...