User Ashvin

71 votes

2 answers

7k views

Can a human land on Deimos using pressurized deodorant cans?

asked Apr 27, 2021 at 6:16

15 votes

2 answers

2k views

Till what altitude above earth sounds can be heard?

spacex falcon-9 physics sound video

asked Sep 10, 2020 at 1:02

12 votes

1 answer

1k views

Why was the Atlas V's SRB kept attached for 1 minute after burnout in the OFT-2 mission?

srb atlas-v cst-100 boeing

asked May 20 at 4:11

11 votes

1 answer

1k views

Does the Merlin vacuum engine on SpaceX's Falcon 9 gimbal?

spacex falcon-9 attitude-determination-and-control vacuum gimbaled-engines

asked May 11 at 16:47

11 votes

2 answers

1k views

What are the benefits of supersynchronous transfer orbits?

orbital-mechanics orbital-maneuver delta-v geosynchronous supersynchronous

asked Jan 10 at 10:20

10 votes

3 answers

2k views

Why do $\text{CH}_4$ (Raptor) engines produce less soot than RP-1 (Merlin) engines?

spacex fuel reuse chemistry oxidizer

asked Feb 3 at 13:21

10 votes

1 answer

357 views

What are the advantages of air lit solid boosters in PSLV XL?

isro booster pslv ignition

asked Feb 12 at 16:54

9 votes

0 answers

187 views

Why is the water pumped out of the holding tank a minute before Falcon 9 liftoff?

spacex falcon-9 water acoustic-sound-suppression

asked Oct 6, 2020 at 17:22

9 votes

2 answers

2k views

Can a satellite orbit the ISS?

orbital-mechanics gravity

asked Jan 8, 2021 at 6:27

9 votes

1 answer

555 views

Can the space shuttle use OMS engines during landing?

space-shuttle landing entry-descent-landing

asked Jan 24, 2021 at 7:04

8 votes

1 answer

463 views

What are the disadvantages of pneumatic stage separation systems?

stage-separation pyrotechnic-fasteners

asked Feb 22 at 8:20

7 votes

1 answer

203 views

Why do rockets coast before secondary payload deployment?

orbital-mechanics payload-deployment separation secondary-payload

asked Aug 31, 2020 at 1:01

7 votes

1 answer

1k views

What is the terminal velocity of SpaceX Starship?

reentry physics spacex-starship aerodynamics velocity

asked Dec 10, 2020 at 23:32

7 votes

2 answers

1k views

Why does the Falcon 9 use turbopumps as well as helium pressurisation system?

falcon-9 pressure turbopump ullage helium

asked Oct 12, 2020 at 18:45

7 votes

4 answers

2k views

How are vacuum optimized engines tested without disintegrating them?

propulsion spacex-starship vacuum raptor

asked Oct 22, 2021 at 7:44

5 votes

1 answer

486 views

Is there any website where we can view live orbit of all satellites to scale?

artificial-satellite orbit analysis

asked Dec 28, 2021 at 6:48

5 votes

1 answer

315 views

What is the delta v required for insertion to sun-earth L2?

orbital-maneuver delta-v lagrangian-points james-webb-telescope orbital-insertion

asked Dec 29, 2021 at 8:34

4 votes

0 answers

42 views

What does diiferent colours in orbital path seen in the CRS 21 launch video indicate?

spacex falcon-9 identify-this-object orbital-elements

asked Dec 7, 2020 at 1:10

4 votes

1 answer

153 views

Can rocket engines which use hypergolic propellants be augmented with LOX for increased efficiency?

design-alternative liquid-fuel oxidizer hypergolics propellant-ratio

asked May 27, 2021 at 3:18

3 votes

1 answer

156 views

Can Falcon 9's engines be ignited more than 4 times if there is enough TEA-TEB?

falcon-9 engines merlin-1d ignition

asked Mar 2, 2021 at 20:34

3 votes

2 answers

193 views

What would have happened if lightning struck the Orion LES instead of the umbilical tower?

sls orion-spacecraft weather artemis-program lightning

asked Apr 4 at 9:58

3 votes

1 answer

186 views

What would happen during an inflight abort in a Falcon 9 if the booster engines did not shut down?

spacex falcon-9 abort super-draco

asked Jun 14 at 8:50

2 votes

2 answers

283 views

Can the Space Shuttle land on Mars assuming there is a paved surface for landing?

mars space-shuttle reentry landing aerodynamics

asked Jan 7, 2021 at 17:38

2 votes

0 answers

90 views

Why are fins located on stage 2 of Iranian rocket Zol Janah?

launch-vehicle aerodynamics fins iran

asked Feb 12, 2021 at 15:56

0 votes

0 answers

37 views

How much delta v did the space shuttle use for orbital insertion? [duplicate]

space-shuttle orbital-maneuver delta-v

asked Jun 6 at 11:13

-3 votes

1 answer

112 views

Can starship land back on earth after sending 100 tons to LEO? [closed]

spacex spacex-starship entry-descent-landing

asked May 25 at 7:52

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26 Questions

Can a human land on Deimos using pressurized deodorant cans?

Till what altitude above earth sounds can be heard?

Why was the Atlas V's SRB kept attached for 1 minute after burnout in the OFT-2 mission?

Does the Merlin vacuum engine on SpaceX's Falcon 9 gimbal?

What are the benefits of supersynchronous transfer orbits?

Why do $\text{CH}_4$ (Raptor) engines produce less soot than RP-1 (Merlin) engines?

What are the advantages of air lit solid boosters in PSLV XL?

Why is the water pumped out of the holding tank a minute before Falcon 9 liftoff?

Can a satellite orbit the ISS?

Can the space shuttle use OMS engines during landing?

What are the disadvantages of pneumatic stage separation systems?

Why do rockets coast before secondary payload deployment?

What is the terminal velocity of SpaceX Starship?

Why does the Falcon 9 use turbopumps as well as helium pressurisation system?

How are vacuum optimized engines tested without disintegrating them?

Is there any website where we can view live orbit of all satellites to scale?

What is the delta v required for insertion to sun-earth L2?

What does diiferent colours in orbital path seen in the CRS 21 launch video indicate?

Can rocket engines which use hypergolic propellants be augmented with LOX for increased efficiency?

Can Falcon 9's engines be ignited more than 4 times if there is enough TEA-TEB?

What would have happened if lightning struck the Orion LES instead of the umbilical tower?

What would happen during an inflight abort in a Falcon 9 if the booster engines did not shut down?

Can the Space Shuttle land on Mars assuming there is a paved surface for landing?

Why are fins located on stage 2 of Iranian rocket Zol Janah?

How much delta v did the space shuttle use for orbital insertion? [duplicate]

Can starship land back on earth after sending 100 tons to LEO? [closed]