We tend to forget on this forum that one of the A in NASA stands for Aeronautics.
Quote from: TrevorMonty on 02/26/2016 09:43 amWe tend to forget on this forum that one of the A in NASA stands for Aeronautics.True I'll admit. I would be curious to know what NASA plans to roll out next for a new plane.
If the study is successful, NASA wants to fund a demonstration programme. Lockheed would test the dual-mode ramjet in a flight research vehicle, and try to find solutions to issues like engine packaging and designing the thermal management system, Bartolotta says.
Quiet Boom demonstrator is the top priority at the moment.
Quote from: Star One on 02/26/2016 03:15 pmQuiet Boom demonstrator is the top priority at the moment.If the tendency is towards greener aviation I fail to see supersonic flight as top priority with or without boom. Hybrids, solar/battery electric more likely.
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.
Why not both?
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.Chris, do you have a projected turn-around time for re-charge on such a design?~Rob
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?
Quote from: Rocket Science on 02/28/2016 07:46 amQuote 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.Chris, do you have a projected turn-around time for re-charge on such a design?~RobI strongly suppose that if a fully battery operated airplane enters commercial operation, it would need to come with a quick battery swap option to keep turnaround time low and thermal loads acceptable.
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.
any takers on what design concept will be picked?