Born Hunter 17,907 Posted June 9 Report Share Posted June 9 3 minutes ago, chartpolski said: You guys will know more about the space stuff than me if that’s what you’re interested in. I’ve been retired for 21 years and the aircraft type I last had recurrent training on is obsolete and out of service now ! LOL ! I know technology has come on greatly and I’d be considered a bit of a Luddite now ! Cheets. Just interesting areas of R&D to watch in aero mate that’s all. The Chinese might develop teleportation and completely ruin everything! 1 Quote Link to post Share on other sites
Born Hunter 17,907 Posted June 9 Report Share Posted June 9 3 minutes ago, mushroom said: Maybe one of the scram jets could achieve it in a thin atmosphere but you still need conventional to get there before engaging them and don’t they scrams work by forcing air in for combustion? So will the new design need something like a two/three stage engine system with extra oxygen. One conventional to take off and then a scram to get up above the atmosphere and then just something simple for positioning/direction once there? So those scalar and vector classes mean fuuck all in this new world then! Google Reaction Engine SABRE prototype. They got funding from HMG as well as a load of private aero/defence players for their hybrid air breathing rocket engine design. Some of the developments from that are going into the tempest program I believe. But yeah scramjet would require a regular jet to get to operating speeds for the scram jet to work and then an actual rocket to operate in space. Essentially non viable hence the work on hybrid engines that can do it all. 1 Quote Link to post Share on other sites
mushroom 13,964 Posted June 9 Report Share Posted June 9 1 minute ago, Born Hunter said: Google Reaction Engine SABRE prototype. They got funding from HMG as well as a load of private aero/defence players for their hybrid air breathing rocket engine design. Some of the developments from that are going into the tempest program I believe. But yeah scramjet would require a regular jet to get to operating speeds for the scram jet to work and then an actual rocket to operate in space. Essentially non viable hence the work on hybrid engines that can do it all. I’ll take a look mate thanks Quote Link to post Share on other sites
Lenmcharristar 10,236 Posted June 9 Report Share Posted June 9 For the hypersonics to work efficently and reliably we would need to be able to create a protective plasma around the craft which behaves differently to the air around it, meaning keeps the outer skin of the craft cool enough to stay safe, this is a very interesting topic now, the sr71 had a moving nose cone on the fro t of the engines that slowed down the air enough from supersonic to sub sonic sp the engines worked correctly, they have tried pulse detonation engines but they are too unstable and keep going out of rhythm, id say they have the tech but not for civi use, i mean look at the blackbird, designed in the 50s and was years ahead of its time so what-do they have now? Didnt a nasa engineer say they have interstellar craft and propulsion craft already? Look what us mere mortals can think up in here probably is old tech in the black project world, its going be a quantum physics designed engine needed for future travel as rockets are too unstable for everyday use for passengers Quote Link to post Share on other sites
mushroom 13,964 Posted June 9 Report Share Posted June 9 Aye I’ve seen these before but not looked into or followed the tech…. That’s me going to sleep in 5 hours then Quote Link to post Share on other sites
chartpolski 27,360 Posted June 9 Report Share Posted June 9 3 minutes ago, Lenmcharristar said: For the hypersonics to work efficently and reliably we would need to be able to create a protective plasma around the craft which behaves differently to the air around it, meaning keeps the outer skin of the craft cool enough to stay safe, this is a very interesting topic now, the sr71 had a moving nose cone on the fro t of the engines that slowed down the air enough from supersonic to sub sonic sp the engines worked correctly, they have tried pulse detonation engines but they are too unstable and keep going out of rhythm, id say they have the tech but not for civi use, i mean look at the blackbird, designed in the 50s and was years ahead of its time so what-do they have now? Didnt a nasa engineer say they have interstellar craft and propulsion craft already? Look what us mere mortals can think up in here probably is old tech in the black project world, its going be a quantum physics designed engine needed for future travel as rockets are too unstable for everyday use for passengers Would the moveable nose cone be a VIVG , ( Variable Inlet Vane Guide ) used basically to control the speed of the air entering the engine compared to the actual air speed . We overhauled these in house using calibration equipment to simulate flight conditions. Cheers. Quote Link to post Share on other sites
Lenmcharristar 10,236 Posted June 9 Report Share Posted June 9 3 minutes ago, chartpolski said: Would the moveable nose cone be a VIVG , ( Variable Inlet Vane Guide ) used basically to control the speed of the air entering the engine compared to the actual air speed . We overhauled these in house using calibration equipment to simulate flight conditions. Cheers. The nose cones used to slide back and forth, yes it slowed down the air to subsonic so that the engine worked efficent, also the fuel it ran on had to be invented too 2 Quote Link to post Share on other sites
Lenmcharristar 10,236 Posted June 9 Report Share Posted June 9 Above i meant a rotating detonating engine not a pulse jet as such like the doodle bug ran on Quote Link to post Share on other sites
chartpolski 27,360 Posted June 9 Report Share Posted June 9 1 minute ago, Lenmcharristar said: Above i meant a rotating detonating engine not a pulse jet as such like the doodle bug ran on Same technology, the inlet air control, used on aircraft jet engines. Cheers. Quote Link to post Share on other sites
Lenmcharristar 10,236 Posted June 9 Report Share Posted June 9 Just now, chartpolski said: Same technology, the inlet air control, used on aircraft jet engines. Cheers. Also why has nobody tried using a small turbo diesel engine in home built light air craft that would power drone style propulsion where it dont need wings, surely it would be lighter than batteries with a much bigger range if it only powers electric motors Quote Link to post Share on other sites
mushroom 13,964 Posted June 9 Report Share Posted June 9 I’m 5mins in on looking at this SABRE and it’s doing my brain in lol Mach 5 is around 9-10k km/h you need 11-12k km/h to reach escape velocity (I think the Saturns were hitting 13+k km/h). So that final push when it switches to rocket is what will give it the extra oomf to reach low orbit. It’s still carrying a fuuckton of fuel though. So weight, thrust, parabolic trajectory, distance will still be the same as conventional? Or am I wrong? Quote Link to post Share on other sites
chartpolski 27,360 Posted June 9 Report Share Posted June 9 9 minutes ago, Lenmcharristar said: Also why has nobody tried using a small turbo diesel engine in home built light air craft that would power drone style propulsion where it dont need wings, surely it would be lighter than batteries with a much bigger range if it only powers electric motors I would say because a diesel engine is , because of the much higher compression needed for ignition, far heavier than a petrol engine of similar power. Cheers. 1 Quote Link to post Share on other sites
Lenmcharristar 10,236 Posted June 9 Report Share Posted June 9 3 minutes ago, mushroom said: I’m 5mins in on looking at this SABRE and it’s doing my brain in lol Mach 5 is around 9-10k km/h you need 11-12k km/h to reach escape velocity (I think the Saturns were hitting 13+k km/h). So that final push when it switches to rocket is what will give it the extra oomf to reach low orbit. It’s still carrying a fuuckton of fuel though. So weight, thrust, parabolic trajectory, distance will still be the same as conventional? Or am I wrong? Yes basically the more mass you have to push the more energy it needs, hence bigger fuel tanks or air to air refuelling before going to space, the problem with rockets is the fuel, solid once lit has to fully burn out and a liquid can be very unstable for everyday use, i suppose the problems and solutions will be made at design level before anything ever takes off, look at rapulsine engines or liquid mercury which the nazis weee experimenting with during ww2 1 Quote Link to post Share on other sites
mushroom 13,964 Posted June 9 Report Share Posted June 9 1 minute ago, Lenmcharristar said: Yes basically the more mass you have to push the more energy it needs, hence bigger fuel tanks or air to air refuelling before going to space, the problem with rockets is the fuel, solid once lit has to fully burn out and a liquid can be very unstable for everyday use, i suppose the problems and solutions will be made at design level before anything ever takes off, look at rapulsine engines or liquid mercury which the nazis weee experimenting with during ww2 I’m gonna pick this up another day. I’m already side delving into the escape velocity equations lol Vinfinity2 = V2 - Ve2 and that’s just if you wanna visit Mars not get from Peckham to Paris 1 Quote Link to post Share on other sites
chartpolski 27,360 Posted June 9 Report Share Posted June 9 4 minutes ago, Lenmcharristar said: Yes basically the more mass you have to push the more energy it needs, hence bigger fuel tanks or air to air refuelling before going to space, the problem with rockets is the fuel, solid once lit has to fully burn out and a liquid can be very unstable for everyday use, i suppose the problems and solutions will be made at design level before anything ever takes off, look at rapulsine engines or liquid mercury which the nazis weee experimenting with during ww2 Interesting about the fuel . My dad worked at Spadeadam in Cumbria where the Blue Streak rocket was being developed. He was just a maintenance man, not actually involved in the rocket. Anyhow, the Blue Streak was intended as a return strike ICBM in case of a Soviet nuclear strike. Problem was it was fueled by a mixture of kerosene and liquid oxygen. The kerosene was onboard but the liquid oxygen could only be added at the last minute to prevent it from freezing . It took about five minutes to add it to the kerosene in the fuel tanks, and in the event of a Soviet nuclear strike they would be here in four minutes, rendering the Blue streak obsolete ! They couldn’t find any solution so the project was scrapped ! Cheers. 2 Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.