China's transport, tanker & heavy lift aircraft - esp. Y-20/YY-20

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ACuriousPLAFan

Brigadier
Registered Member
wssth0306 said:
Make some sense but it just weird to me that it isn' shipped overland or sea cause it is cheaper, a overland truck could get if from Tianjing to Hainan in about 3 days , but that off topic.
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Needing to keep the satellite cooled for 3 days while on the move versus needing to keep the satellite cooled for only a couple of hours while on the move - Which one is more cost-effective?

Also, "cheaper" is relative, especially once the risks involved for ground or sea transportations are taken into account. What if there are traffic jams? Bad weather? Infrastructure obstacles? Rough sea conditions? No-entry zones on the sea (for today)? All of these can add to delays, which increase associated risks and uncertainties when delivering precious cargo like satellites.
 
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PeoplesPoster

Junior Member
ACuriousPLAFan said:
Needing to keep the satellite cooled for 3 days while on the move versus needing to keep the satellite cooled for only a couple of hours while on the move - Which one is more cost-effective?

Also, "cheaper" is relative, especially once the risks involved for ground or sea transportations are taken into account. What if there are traffic jams? Bad weather? Infrastructure obstacles? Rough sea conditions? No-entry zones on the sea (for today)? All of these can add to delays, which increase associated risks and uncertainties when delivering precious cargo like satellites.
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also with the value of satellites and other space launched components, air shipping is a small small percentage of the total cost.
 
Tomboy

Tomboy

Senior Member
Registered Member
sheogorath said:
Most modern high bypass turbofans don't have reversers in the core, though, only the air from the fan is used. Dealing with the hot, high pressure air from core would require reinforcements on the wing and nacelles.
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C-17 has this feature specifically to fulfill it's tactical role
 
sheogorath

sheogorath

Colonel
Registered Member
Tomboy said:
C-17 has this feature specifically to fulfill it's tactical role
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Yeah, but because it was also meant to carry heavier loads including the plan to do fast deployments of M1 Abrams, so it needed all the extra breaking power it could muster. Nowadays I doubt there is such a need or even a possibility of fast deploying combat ready MBT's in austere airfields near the front lines to require core reversers, and brake tech has also gotten better since the days of the C-17

Plus the fact MBT's have gotten heavier than what the original concept envisaged.
 
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