|
|
|
Thread Tools | Display Modes |
#12
|
|||
|
|||
Air breathing re-entry concept
Jim Davis wrote in message .1.4...
Zoltan Szakaly wrote: I have three in my garage that work at 0 velocity, they suck in air and they pump out heated air. They burn fuel with the air as oxidizer. They have no moving parts and get an Isp of over 4,000. How do they manage to suck in air with no moving parts? Jim Davis By injection of hot fuel vapors into the inlet under high pressure. Zoltan |
#13
|
|||
|
|||
Air breathing re-entry concept
Henry Spencer wrote:
In article , Zoltan Szakaly wrote: What if I have a metal nose cone filled with a liquid and as the liquid is heated it boils out through a hole at the very tip. This would work for a conventional cylindrical rocket that comes back nose first... Schemes somewhat along those lines have reportedly been used for ICBM warheads, which want to keep their velocity as much as they can (to make interception difficult). They also would want to do this because the heat rate at the surface of the RV is an inverse function of the radius of curvature, and is very high at the tip (that's the other reason for blunt reentry bodies, to keep the shock far away.) IIRC, liquid lithium has been proposed for this in pointy vehicles to be launched from ground-based accelerators (coilguns or the like). Paul |
#14
|
|||
|
|||
Air breathing re-entry concept
|
#15
|
|||
|
|||
Air breathing re-entry concept
Zoltan Szakaly wrote:
I think you are completely correct. These engines are light, cheap, simple, so they could be used for a low tech lifting vehicle like an air breathing first stage. I have also contemplated air breathing flyback boosters that would increase payloads of existing launch systems. Like a ... plane? I actually rather like the idea of air-breathing reusable flyback first stage (whetver monolithic or cluster). it should also lety youtest systems and stages separately without major hardware losses. I would like to build a flying prototype of my flying car that can hover for maybe 20 minutes to half an hour. Zoltan -- Sander +++ Out of cheese error +++ |
#16
|
|||
|
|||
Air breathing re-entry concept
In article ,
Michael J Wise wrote: ...essentially an ablative heatshield where you can refurbish the ablator by refilling a tank, which is very nice. But nobody has a very clear idea of how best to arrange the details. Maybe they should try a few tests? This is another area (in addition to advanced rocket propulsion) where a program of modest X-vehicles could make a huge difference. Heatshield technology really is rather poorly developed, except for one or two very specific approaches which have serious disadvantages. Jeff Greason's comment at last spring's Space Access was "we're in about 1902 for TPS". -- MOST launched 1015 EDT 30 June, separated 1046, | Henry Spencer first ground-station pass 1651, all nominal! | |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Mars,Moon,Eart re entry a pop quiz | Lynndel Humphreys | Space Shuttle | 0 | January 15th 04 05:24 PM |
Ultra-Low Oxygen Could Have Triggered Mass Extinctions, Spurred Bird Breathing System | Ron Baalke | Science | 0 | October 31st 03 05:34 PM |
feedback on orbiter concept? | Penguinista | Technology | 2 | August 14th 03 12:21 PM |
Buffeting during STS-107 entry (WAS: This group) | Doug... | Space Shuttle | 1 | July 31st 03 02:55 PM |
Humans, Robots Work Together To Test 'Spacewalk Squad' Concept | Ron Baalke | Space Station | 0 | July 2nd 03 04:15 PM |