Quote from: 93143 on 02/28/2016 09:39 amQuote from: kevin-rf on 02/27/2016 03:17 amI read a while back on the blended body design something I do not quite understand. During a turn passengers seated out towards the wing will experience higher g loads than those seated in the center. Not sure how that works, is the turn radius that small?Wouldn't that refer specifically to the bank maneuver itself? The rotation of the vehicle would be much more noticeable that far from the roll axis.Probably refers to rolling in general. An already-banked turn that still has rudder involvement will indeed put higher lateral (not vertical) g-loading on the outer edge, but it's likely to be a very small difference because the turn radius is high.
Quote from: kevin-rf on 02/27/2016 03:17 amI read a while back on the blended body design something I do not quite understand. During a turn passengers seated out towards the wing will experience higher g loads than those seated in the center. Not sure how that works, is the turn radius that small?Wouldn't that refer specifically to the bank maneuver itself? The rotation of the vehicle would be much more noticeable that far from the roll axis.
I read a while back on the blended body design something I do not quite understand. During a turn passengers seated out towards the wing will experience higher g loads than those seated in the center. Not sure how that works, is the turn radius that small?
Hoping for the Hybrid tail fan. Call me a fan
I am rooting for blended wing body. Call me delusional, but I want the future to look (retro)futuristic!
My koolaidX is too dilluted to believe in supersonic electric jets in any near future.
Hybrids are neat and all, but full-electric is where it's at. Ultra-high-performance lithium-ion and lithium-sulfur can do 300-400Wh/kg, which should do 1000km with some of those advanced designs, if you're clever. With lithium-air batteries (which need a lot of process development to get to any kind of decent cycle life) using the newer designs, you could get range comparable to all current jet liners. And potentially supersonic electric flight.
Quote from: Robotbeat on 02/28/2016 01:59 amHybrids are neat and all, but full-electric is where it's at. Ultra-high-performance lithium-ion and lithium-sulfur can do 300-400Wh/kg, which should do 1000km with some of those advanced designs, if you're clever. With lithium-air batteries (which need a lot of process development to get to any kind of decent cycle life) using the newer designs, you could get range comparable to all current jet liners. And potentially supersonic electric flight.Is there any way a hybrid could benefit from using an engine cycle optimised to take advantage of the lower temperature heat sink of frigid stratospheric air. Thinking here of combined-cycle engine with a potentially 70degC (20degC - -50degC, 223K as opposed to 293K) increase in the heat sink dT? The hybrid would climb to altitude on batteries. (Or would this be better on Titan.)gas-turbine-> steam turbine -> ORC (organic rankine cycle) turbine -> -50degC atmos.diesel --> ORC -> -50deg atmos.steam-piston --> ORC -> -50deg atmos.[using skylon heat exchangers ]
Hybrids are neat and all, but full-electric is where it's at. Ultra-high-performance lithium-ion and lithium-sulfur can do 300-400Wh/kg, which should do 1000km with some of those advanced designs, if you're clever.
Well not to stomp on the parade, and this would be Chris' call, but is seems to me this announcement is in the realm of aeronautics, not spaceflight.(though personally I think it's well overdue to have another supersonic aircraft, and it's wickedly cool stuff)
Quote from: robertross on 02/29/2016 07:55 pmWell not to stomp on the parade, and this would be Chris' call, but is seems to me this announcement is in the realm of aeronautics, not spaceflight.(though personally I think it's well overdue to have another supersonic aircraft, and it's wickedly cool stuff)Have you forgotten what the 'A' stands for in NASA. This is a personal bugbear for me.
However, people also seem to forget the name of this site: NASASpaceflight.
Quote from: robertross on 02/29/2016 10:28 pmHowever, people also seem to forget the name of this site: NASASpaceflight. Not NASASpaceflight Of course in the old days the S used to be a C, NACA!