Questions tagged [sub-orbital]

Questions involving trajectories that reach space but do not attain orbit.

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Size of sugar rocket to reach space (suborbital)

How much propellant would an ideal single stage sugar rocket with dry mass of 1 kg need to reach the altitude of 100 km in a suborbital flight when launched straight up? Let us assume the specific ...
Kozuch's user avatar
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17 votes
2 answers
1k views

What kind of heating would occur during a suborbital re-entry?

What kinds of peak temperatures would a stage similar in proportions to the Space shuttle with a similar belly-first approach experience when re-entering from a low suborbital trajectory (similar to a ...
XBN's user avatar
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3 votes
1 answer
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What are the differences between Skyroot Aerospace's Vikram-S and Vikram-1?

Skyroot Aerospace (an Indian aerospace startup ) is ready to launch its first launch vehicle Vikram-S, which is the suborbital version of Vikram-1. What are the differences in flight hardware between ...
Ashvin's user avatar
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1 vote
1 answer
209 views

Gravity Calculation Inaccurate?

For the past week, I've been working on an Effective Gravitational Acceleration calculator on Desmos. This calculator ignores drag and assumes that a rocket is flying up completely straight. What this ...
user48194's user avatar
2 votes
1 answer
248 views

Future Plasma-Scramjet engines: If/how they could be used in the launching of spacecraft

Recently I took a look at this paper: “Electrically Driven Supersonic Combustion”, Energies 2018, 11, 1733; doi:10.3390/en11071733 https://www.mdpi.com/1996-1073/11/7/1733 It made me think about ...
Dakota Wharton's user avatar
3 votes
0 answers
111 views

Temperature distribution of air around a rocket

I am doing some simulations in ANSYS Fluent of a rocket traveling at speed of 100 m/s at an altitude of 12000 m where the surroundings temperature is 216.7 K. The image above is the temperature ...
Weyooo's user avatar
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0 votes
2 answers
736 views

Why doesn't NASA fly its rockets on suborbital trajectories to the Moon?

After trying it out in Kerbal Space Program for a while, I was wondering why NASA doesn't fly on suborbital trajectories to the Moon. When I tested this idea in Kerbal Space Program I found out that ...
The Rocket fan's user avatar
3 votes
1 answer
109 views

Targeted Sub-Orbital Optimization Problem

I was messing around with some orbital dynamics for a simulator I am working on, and I came across a snag that I have not been able to figure out. Specifically, I am trying to minimize the required ...
frank's user avatar
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2 votes
1 answer
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What kind of rocket design would be used for Lunar/Mars E2E travel when colonized?

If/When Mars or the moon are colonized, transport will be needed between bases. Over long distances, rovers would be too slow and traditional aircraft would not work well in thin to non existent ...
Small-Jaguar's user avatar
3 votes
1 answer
167 views

OPS 0855 Gemini B Separation

On 3 November 1966 a modified Titan IIC launched from LC-40 in Cape Canaveral. This launch would be the only launch as part of the Manned Orbiting Laboratory program. Designated OPS 0855 the vehicle ...
Jeroen Smink's user avatar
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3 votes
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Calculating the projectile of rocket using RCS to tilt the flight path

If I have main solid rocket with 800 N Thrust, 9 kg in total and has RCS thrusters 0.5 m from the center mass. Mid flight the RCS with 1 N force is activated for 2 sec. How does it affect the flight ...
Rocket Hack's user avatar
2 votes
1 answer
318 views

Why are my empirical and theoretical value of mass flow rate in solid propellant rockets not similar?

For a rocket of: fuel mass $m_f$ = 6 kg, Thrust = 3.1 kN, (vs 4k using reducing catalyst to delay burn time) total powered burn time, $t_b$ = 3.5 s, (using reducing catalyst vs 1.8 sec) This ...
Rocket Hack's user avatar
2 votes
0 answers
176 views

Why did Blue Origin make 5 times more flight tests than Virgin Galactic before sending their founders (Jeff Bezos for BO, R. Branson for VG) to space?

https://twitter.com/blueorigin/status/1413521631717122059 (mirror): Why did Blue Origin make 5 times more flight tests than Virgin Galactic before sending their founders (Jeff Bezos for BO, Richard ...
Franck Dernoncourt's user avatar
14 votes
2 answers
7k views

Why does Blue Origin claim Virgin Galactic's spaceplane doesn’t have an escape system whereas Virgin Galactic's passengers are wearing parachutes?

https://twitter.com/blueorigin/status/1413521631717122059 (mirror): vs. https://space.stackexchange.com/a/54072/1111 by John Thomas: [Virgin Galactic's passengers] do appear to be wearing parachutes....
Franck Dernoncourt's user avatar
5 votes
0 answers
117 views

What would it take to bring VSS Unity over the Kármán line?

There's been a great deal debate about Virgin Galactic calling 50 miles "space", while most use a 100 km Kármán line definition for the term. VSS Unity has exceeded 89 km altitude on two ...
Adám's user avatar
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2 votes
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How can I calculate the weight a aero-spacecraft occupant experiences during sub-orbital but non-ballistic trajectories?

Once in orbit, astronauts experience "weightlessness" relative to their capsule or space station because they are moving at the same orbital velocity as the surrounding spacecraft. I have ...
Wesley Adams's user avatar
1 vote
0 answers
67 views

What percentage of the population can pass Virgin Galactic's training sessions for tourists to board a sub-orbital spaceflight?

I read on https://www.cnbc.com/2020/09/26/space-tourism-how-spacex-virgin-galactic-blue-origin-axiom-compete.html (mirror): Additionally, Virgin Galactic has said that passengers will spend three ...
Franck Dernoncourt's user avatar
2 votes
1 answer
207 views

How long do the ascent and the descent of Virgin Galactic's spacecraft take?

The VMS Eve mothership releases the VSS Unity spacecraft after ca. 48 minutes. The total duration is approximately 2 hours. As a result, the ascent time + the descent time that the Virgin Galactic's ...
Franck Dernoncourt's user avatar
2 votes
1 answer
521 views

Are Virgin Galactic tourists asked to take a 6 to 8G centrifuge test to qualify, and if so, what's the point?

Regarding sub-orbital spaceflights with Virgin Galactic, claims that: Allegedly some travelers were asked to take a 6 to 8G centrifuge test to qualify Is that true, ...
Franck Dernoncourt's user avatar
5 votes
1 answer
688 views

Do the passengers in Virgin Galactic's VSS Unity spacecraft have a parachute or some other way to escape the spacecraft if needs be?

Do the passengers in Virgin Galactic's VSS Unity spacecraft have a parachute or some other way to escape the spacecraft if needs be? In the VSS Enterprise crash that occurred on October 31, 2014, the ...
Franck Dernoncourt's user avatar
0 votes
1 answer
334 views

Why isn't the engine's Case-Throat-Nozzle reusable in Virgin Galactic's SpaceShipTwo?

I raed on https://www.smithsonianmag.com/smithsonian-institution/engine-powering-future-civilian-spaceflight-enters-collections-180971493/ (mirror): RocketMotorTwo is a hybrid rocket motor that ...
Franck Dernoncourt's user avatar
4 votes
0 answers
160 views

Which components are non-reusable after a sub-orbital spaceflight with Virgin Galactic?

I wonder which components are non-reusable after a sub-orbital spaceflight with Virgin Galactic. What I have found so far: https://www.virgingalactic.com/learn/ (mirror): With the exception of the ...
Franck Dernoncourt's user avatar
1 vote
3 answers
246 views

What kind of badge will tourists who performed a sub-orbital spaceflight receive?

I have read that tourists who performed a sub-orbital spaceflight with Virgin Galactic will receive some kind of astronaut badge. However, on the Wikipedia page on the United States Astronaut Badge, ...
Franck Dernoncourt's user avatar
9 votes
2 answers
2k views

Could the SpaceShipOne fly again?

A similar question to that one, but this one is concerning the suborbital SpaceShipOne spaceplane. Could it be reactivated for space tourism or other purposes? I remember in 2011 some sources stated ...
Giovanni's user avatar
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Which X-15 and SpaceShipOne flights took Coriolis forces into account on their flight path?

I wonder whether those X-15 and SpaceShipOne flights that reached space took into account the rotational Coriolis forces, so that they wouldn't reenter above a location where it would be too far from ...
Giovanni's user avatar
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2 votes
1 answer
375 views

Could the Space X "Starship" be modified for point to point travel on Earth?

After seeing recent successes with the SN5 prototype, powered with very inexpensive LNG, designed to carry 100+ people, is this ... an airliner? A suborbital Starship could make trans Atlantic and ...
Robert DiGiovanni's user avatar
2 votes
0 answers
98 views

Is suborbital point-to-point flight on the SpaceShipTwo possible?

As of until now, both the SpaceShipTwo and its retired predecessor the SpaceShipOne, landed on the same spaceport they launched from in their spaceflights, the Mojave air- and spaceport. I wonder ...
Giovanni's user avatar
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Has a suborbital rendezvous ever been mentioned in a serious mission proposal/study? [duplicate]

This is an odd one that's been in the back of my head for a while. Consider the LOR architecture of the Apollo missions. To return to earth from the lunar surface, it is most mass-efficient to have ...
Anton Hengst's user avatar
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7 votes
6 answers
3k views

What is the highest possible altitude of a sub-orbital flight?

If you launch a rocket 101 km high and it doesn't reach orbital velocity then it will return to Earth without completing an orbit. Even though it reached outer space. But if you launch it 10 million ...
Joe Jobs's user avatar
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0 votes
1 answer
229 views

Can Virgin Galactic's Orbital ship reach ISS

We have all come across theories, concepts proposed missions of orbit tour as a part of space tourism. One such company is Virgin Galactic. I have had read that the SpaceShip2 will have merely 6 mins ...
Pranay's user avatar
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5 votes
1 answer
713 views

What was the point of the Redstone rocket when there was the X-15 rocketplane?

Just a curiousity question, so don't get me wrong for I very much admire and have high respect towards the entire Mercury project, Alan Shepard (the first American in space, a national hero) and Gus ...
LoveForChrist's user avatar
1 vote
0 answers
374 views

What's the minimum speed for a spaceplane to reach outer space? [closed]

From a realistic point of view there must be a minimum speed in order to reach space in a suborbital spacecraft, let's say in a spaceplane. Like there's a first cosmic velocity (for orbit) and a 2nd ...
LoveForChrist's user avatar
1 vote
3 answers
353 views

How many hours long is Earth's longest possible sub-orbital flight?

This comment below How long will last the Blue Origin New Shepard space flight? says (in part): The words "suborbital spaceflight" as the first words on Blue Origin's webpage for the New Shepard ...
uhoh's user avatar
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1 vote
1 answer
266 views

What materials should I use to make a suborbital amateur rocket and where can I buy them? [closed]

I’m trying to make a suborbital rocket to get some pictures of the Earth but I’m not sure what material’s to use and where to get them. I’ve been thinking of titanium for the shell but I’m not sure ...
Skyfall106's user avatar
4 votes
2 answers
394 views

Why didn't Project Mercury advance to an orbital flight on their second mission?

Manned programs are noted for progressing through a series of flights. Early missions focus on basic hardware and simple tasks; as the technology becomes proven, the scope and duration of later ...
DrSheldon's user avatar
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2 votes
3 answers
439 views

Is there any kind of research on *sub*-orbital rendezvous-ing with a space tug outside the atmosphere?

The key difference with a plain old-fashioned orbital rendezvous would seem to be that there'd be limited time to only briefly match velocities and trajectories: Let's say a vehicle launched from ...
Prototypist's user avatar
4 votes
1 answer
225 views

How does launching suborbital payloads on New Shepard compare to sounding rockets?

Nine NASA payloads will be launched on the upcoming New Shepard mission (NS-10) into a suborbital trajectory. How does launching them on New Shepard compare to using traditional sounding rockets? Why ...
Hans's user avatar
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11 votes
1 answer
580 views

Did the crew of Soyuz MS-10 pass the Karman Line?

Just wondering if Nick Hague got his gold astronaut wings.
Organic Marble's user avatar
7 votes
1 answer
3k views

What is the delta-V equivalent to cross the Kármán line in vertical (suborbital) flight?

...or, well, for a typical example - how much delta-V does New Shepard carry? For orbital launches, there's the ~1km/s estimate to overcome drag and gravitational losses on orbital launches; 8km/s of ...
SF.'s user avatar
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13 votes
1 answer
609 views

Did Soviets/Russians perform any crewed (intentionally) suborbital flights?

Gagarin went directly to the orbit - the first manned flight was orbital. I don't know about any other Soviet or Russian spaceflights that wouldn't be orbital - except for some odd aborted launch or ...
SF.'s user avatar
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9 votes
2 answers
1k views

Falcon 9 maximum point-to-point landing range

Has anyone here ever done enough back-of-the-envelope math to come up with a rough estimate of the maximum landing range of the F9 first stage? I'm talking unladen-swallow-quality math here -- trying ...
stevegt's user avatar
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1 vote
4 answers
2k views

g-forces of suborbital versus orbital passenger travel

I would like to pose a fact-checking question about this article, which is about the Musk/SpaceX idea of using rockets for travel between terrestrial locations. https://www.theverge.com/2017/9/29/...
AlanSE's user avatar
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17 votes
2 answers
5k views

Is 678 km the new altitude record for a rocket shot "straight up" (vertical launch)?

The Space Daily April 10th Rocket Science item Europe's largest sounding rocket launched from Esrange says: MAXUS 9, Europe's largest sounding rocket for experiments in microgravity, successfully ...
uhoh's user avatar
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15 votes
2 answers
2k views

Why does Blue Origin land the crew capsule separate from the booster?

New Shepard of Blue Origin separates the crew capsule from the booster. The crew capsule is in free fall for a while, then the parachutes open and finally the landing rockets give a brief impulse to ...
LocalFluff's user avatar
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5 votes
0 answers
169 views

How will a suborbital flight country to country work?

If a suborbital flight from NY to Beijing will cover about 7k miles in an hour, what will that trajectory be and at what speed (including the Earth's rotation)? Will most of the flight be above the ...
Norberto's user avatar
3 votes
1 answer
450 views

How high can a sounding rocket launch and for how long time can it put a payload in freefall microgravity?

Sounding rockets or suborbital launches basically go straight up and then fall down without entering orbit. That requires much less fuel mass than to achieve 8,000 m/s or so orbital velocity. For how ...
LocalFluff's user avatar
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4 votes
1 answer
386 views

What are the main synergies between sub-orbital and orbital space launch?

A number of companies are working on suborbital flight with Blue Origin, Virgin Galactic and XCOR being among the most recognized today. I don't ask here about what actual plans different companies ...
LocalFluff's user avatar
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2 votes
1 answer
214 views

Shape of an orbit inside a planet

If you are orbiting below the surface of a planet, and ignore drag from rocks (or orbit in a vacuum tunnel), what is the shape of the orbit? Usually, the proportionality law for gravity is $\frac{1}{r^...
SE - stop firing the good guys's user avatar
6 votes
1 answer
180 views

Is high velocity feathered configuration reentry possible?

Feather configuration for reentry used in SpaceshipOne, they say, significantly reduces heat loads on reentry by encountering most drag and significantly reducing a large amount kinetic energy at much ...
Kuldeep Barad's user avatar
21 votes
3 answers
6k views

Do you need a heat shield to enter the atmosphere from non-orbital speeds?

Let's say you launched a rocket straight up, not intending to go into orbit. At its apogee, the rocket is (say) 200 km above the earth: high enough (though certainly not fast enough) for LEO. Would ...
Joe's user avatar
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