Just general info;
IO 540 prop shaft, star gear input shaft, and 6 planet set at 14# before
lightening.
Auto trans Mazda and butchered 540 nose housing at 18#.
Milo
What does it weigh Milo?
Paul Lamar
Hi Milo,
How did you get those holes through those hardened pins ? spark
erosion ? Do you know how long it took to do each hole ?
Cheers Chris in NZ
Paul,
The shaft and the gearing weighed in at 14 pounds (#).
The flywheel housing and the butchered nose case weighed in at 18 pounds
(#), note weight on side of flywheel housing 18#.
Paul, that reminds me we are going to use the 60/45 needled roller
bearings you suggested, does it go under the thrust bearing to the
thrust shoulder on the shaft? Or vice/verses?
Chris,
I did not observe the spark erosion, the technician said the most
difficult part was centering each pin before sparking. However the next
time we do one we will try drilling in the vertical mill with carbide,
but we anticipate that the pin will rotate and will have to take it to
the technician to be sparked.
Milo
Paul,
The shaft and the gearing weighed in at 14 pounds (#).
The flywheel housing and the butchered nose case weighed in at 18 pounds
(#), note weight on side of flywheel housing 18#.
Paul, that reminds me we are going to use the 60/45 needled roller
bearings you suggested, does it go under the thrust bearing to the
thrust shoulder on the shaft? Or vice/verses?
Chris,
I did not observe the spark erosion, the technician said the most
difficult part was centering each pin before sparking. However the next
time we do one we will try drilling in the vertical mill with carbide,
but we anticipate that the pin will rotate and will have to take it to
the technician to be sparked.
Milo
I am not sure I follow you. I see no way of using needle bearings in the
recycle Lyc PSRU.
RL-PSRU if you like :)
It has to be an oil pressure fed thrust bearing just like the Lyc
aircraft engine.
I think you will also need a larger oil pump.
Paul Lamar
Milo,
Thanks for your reply. Drilling the planet pins with a carbide
drill sounds do-able, I have a set of Bad Dog carbide drills that I
bought at Oshkosh, I might give it a try, at the moment I'm a bit
"chicken". It would seem to me that if the planet pin turns it should
be able to be pressed out as it would have broken the little pin that
stops that occurring. The planet pin can then be drilled out in the
lathe, does this sound feasible? I see in one of your photos a planet
carrier on the bench with the pins out, how did you do this Milo? Press
them out, smashing the retaining pins in the process? Or what?
Cheers Chris.
Are you guys planning on doing this?
Paul Lamar
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