a friend calculated next paragrapf about my idea ;
Quote:
The main problem for a rocket are the 7.7 km/s needed to accelerate a payload into low earth orbit. Overcoming gravity usually takes about 1.5 km/s. In your design you are only overcoming the 1.5 km/s - you still need a rocket to accelerate the payload to 7.7 km/s. Using hydrogen and oxygen (exhaust velocity of 4500 m/s) you get a mass ratio of 0.183 => The empty mass of your rocket plus payload would have to be lighter than 18.3% of the launch mass).
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as i understand we can launch horizontally 2.7 ton of (rocket+payload) with 13,05 ton fuel (total 15 ton) at 185 km high and we get payload in orbital speed.
another important question is what is ratio of (cost of fuel) / (cost of hardware) for a standart rocket.
if rocket hardware itself cost 200 million dollar and 500 ton fuel cost 50 million dolar, this is good for yablam idea. but if rocket hardware cost 50 miilon dollar and 500 ton fuel cost 200 million dollar, this is bad for yablam idea because main cost of yablam launch is fuel, not hardware.
possible reasons why this idea is feasible ;
- if you use standart rocket, you can launch 2 or 3 payload at a time (10-15 ton payload per a launch mission). at my idea you can launch tens or hundreds of payloads.
- if you use rocket, rocket will be destroyed totally. in my idea system can be used many times years long in theory. so cost of launch missions will be ONLY fuel and electric producing cost.
- to produce new classic rocket, you spend few months and hudrend millions dollars. in yablam idea relaunching can be done in weeks i think and you only store more fuel and create lift cabins as needed amount.
- maybe research will proof that ; yablam idea is feasible only when we launch minimum 20 payload (or minimum 100 ton) at a time. if we decrease launch prices you can find customer for 20 payloads i think.
- think countries that dont have space industry now. is creating rocket tehchnology or creating yablam technology is easiser and cheaper for them ?
- a space hotel may be thousands of tons. launching thousands of tons to orbit with standart rockets, you need to build hundreds of rocket and this will not be feasible. with yablam you can launch 1.000 of payload (each 5 ton) is possible in 1.000 x 30 min = 26 days. human needs many facilities at orbital each is thousands tons. (mars ship maybe, moon hotel, astreoid mining ship,..)
- yablam is safer. fuel stored at ground in safety tanks. a possible explosion at station rockets high probbaly will not kill humans in lift cabins. lift cabins have enough fuel to escape from hose when needed. with classic rockets, after an explosion people inside rockets dies %99.99 probability as i know.
i am not sure yablam is feasible, many calculations & research is needed to be sure.