Dual propellent tank?!

[Arugela]

I'm assuming aircraft with lift can get off the ground with less than 1.0 TWR. I think bombers usually do like 0.6 according to wiki. Could be wrong though.

What about supercavitation in the lower atmosphere to reduce drag to improve the lift. I haven't gone over this yet, but I think the drag coeeficitient for a 90 degree shape is 0.8. If cavitation helped it might improve it more.

Assuming this works this way. If the drag coeeficient let it get off the ground with x% less thrust. 36000/0.8 = 45000 then It has effective thrust from the lift. If the difference from 90 degrees to 60 degrees is 1.5 modifier then 80/1.5 = 53.3333..... This gives effective thrust of 67500 tons. Just enough to fly fundamentally. I'm assuming I'm probably missing something though(And that that is probably not how it works.). I think the max expected weight on takeoff with full fuel is 64,000 tons.

I still haven't gotten through the formulas for this to know how it works though. But if it close to correct there might be a chance at hypothetically working.

I wonder how much you could use air intakes to supplement the lox in general while still in the atmosphere.

Edit: I changed the craft to have(absolute max fuel) 13500 tons lch4 + 51300 tons lox = 64800 tons fuel + 6480 tons body+cargo(4320 body + 2160 cargo) = 71820 tons on takeoff. The engines are raptor 2's with presumed chamber pressure of 360 atm, 300 tons thrust each, fuel rate of 312.5lb/s=45000lb/s lch4(might be wrong.) @144 engines(1500lb/[email protected]*144=216000lbs/sec/2000=108tons/sec). With a flight time of 10 minutes and a maximum thrust of 43200 on takeoff the only hope is the vehicle can get off the ground with around a 0.53333 coeeficient to lift. If that even makes any sense. The delta v would then be with a ln(11) coeeficient on takeoff.

Body dimensions: 432*250*144 = 15552000/6 = 2592000 ft3/20= 129600ft3 empty space/surface area/2.4 = 54000ft3 cargospace@80lbs/ft3 and wing surface area.

 

The downside is that is has a wing loading on takeoff of 2640 lbs/ft2. With about160-240lb/ft2 (no cargo/cargo) wing loading empty. So, it needs lots of structural strength.

 

Edited May 16, 2023 by Arugela