S-92 gearbox crack
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MGW increase will be to 27700 according to recent briefs by SIkorsky. No impact on or from the MGB issue but a modified IGB will be required to go to the IGW.
MGW increase will be to 27700 according to recent briefs by SIkorsky. No impact on or from the MGB issue but a modified IGB will be required to go to the IGW.
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industry insider,
You seem to have a good knowledge of the S-92 TR drivetrain. Another poster mentioned that the S-92 TR drivetrain components could be retrofit to the H-60 model. Is this true?
You mentioned that the S-92 TR drive intermediate gearbox would need to be upgraded to get the 1200 lb (?) increase in GW. What needs upgrading? Is it bearings, gears, lube system, housings, couplings, or some combination of these?
Also, do you have any idea how much margin (if any) there is in the rest of the S-92 TR drivetrain components with the CT7-8A's?
I'd appreciate any insight you could provide. TIA.
riff_raff
You seem to have a good knowledge of the S-92 TR drivetrain. Another poster mentioned that the S-92 TR drivetrain components could be retrofit to the H-60 model. Is this true?
You mentioned that the S-92 TR drive intermediate gearbox would need to be upgraded to get the 1200 lb (?) increase in GW. What needs upgrading? Is it bearings, gears, lube system, housings, couplings, or some combination of these?
Also, do you have any idea how much margin (if any) there is in the rest of the S-92 TR drivetrain components with the CT7-8A's?
I'd appreciate any insight you could provide. TIA.
riff_raff
Riff
Its gear coating only for the IGB gears themselves I believe. I think that the H60 and S-92 have tended to diverge rather than converge in component terms. The CT7-8A engine itself will probably be the limiting factor for any more IGW programs but there is more engine power on the way with another variant coming.
Its gear coating only for the IGB gears themselves I believe. I think that the H60 and S-92 have tended to diverge rather than converge in component terms. The CT7-8A engine itself will probably be the limiting factor for any more IGW programs but there is more engine power on the way with another variant coming.
Last edited by industry insider; 23rd Aug 2010 at 05:58.
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industry insider,
Thanks for the info.
I believe CT7-8C was designed to go into the H-60 model at some future point, but I was told that the H-60 MRGB is already torque limited under some conditions with the CT7-8A.
riff_raff
Thanks for the info.
I believe CT7-8C was designed to go into the H-60 model at some future point, but I was told that the H-60 MRGB is already torque limited under some conditions with the CT7-8A.
riff_raff
