How did Shepard's and Grissom's speeds compare with orbital velocity?Could it be possible to launch a rocket from a balloon?How can Yuri Gagarin's Vostok 1 flight be considered to have been orbital, since he did not go all the way around Earth?What use could be getting to space just for a bit?How to programmatically calculate orbital elements using position/velocity vectors?How did NASA determine the distance and velocity of voyager 1?How do orbital elements change when force is applied orthogonal to the velocity vector?How to calculate new periapsis and apoapsis after orbital velocity changeHow to rotate orbital ellipse when radial velocity is added to the orbital velocityCalculating velocity state vector with orbital elements in 2DHow do you compare a simulation with a fitted orbit?Detecting propulsive maneuvers in a table of state vectorsHow to match orbital speeds of 2 or more satellites in different orbits?Terraform via moving Ceres To Mars orbit, using ion drive
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How did Shepard's and Grissom's speeds compare with orbital velocity?
Could it be possible to launch a rocket from a balloon?How can Yuri Gagarin's Vostok 1 flight be considered to have been orbital, since he did not go all the way around Earth?What use could be getting to space just for a bit?How to programmatically calculate orbital elements using position/velocity vectors?How did NASA determine the distance and velocity of voyager 1?How do orbital elements change when force is applied orthogonal to the velocity vector?How to calculate new periapsis and apoapsis after orbital velocity changeHow to rotate orbital ellipse when radial velocity is added to the orbital velocityCalculating velocity state vector with orbital elements in 2DHow do you compare a simulation with a fitted orbit?Detecting propulsive maneuvers in a table of state vectorsHow to match orbital speeds of 2 or more satellites in different orbits?Terraform via moving Ceres To Mars orbit, using ion drive
$begingroup$
As is often said here and in XKCD, an orbit isn't merely high up... it's also going fast. The first two American astronauts -- Alan Shepard and Gus Grissom -- did indeed get "high up" enough to qualify as being in space (well above the Karman line). But their flights were "sub-orbital", and they fell back down before making it all the way around the Earth. Let's see if they were "going fast."
What was the maximum speed each achieved by Shepard and Grissom? (You may use whatever units are convenient.)
What speed would they have needed to acheive orbit?
In percent, how did their maximum speeds compare to orbital velocity?
For further reading:
- Could it be possible to launch a rocket from a balloon?
- What use could be getting to space just for a bit?
- How can Yuri Gagarin's Vostok 1 flight be considered to have been orbital, since he did not go all the way around Earth?
orbital-mechanics project-mercury
asked 1 hour ago
Dr SheldonDr Sheldon
5,27111953
$endgroup$
add a comment |
$begingroup$
As is often said here and in XKCD, an orbit isn't merely high up... it's also going fast. The first two American astronauts -- Alan Shepard and Gus Grissom -- did indeed get "high up" enough to qualify as being in space (well above the Karman line). But their flights were "sub-orbital", and they fell back down before making it all the way around the Earth. Let's see if they were "going fast."
What was the maximum speed each achieved by Shepard and Grissom? (You may use whatever units are convenient.)
What speed would they have needed to acheive orbit?
In percent, how did their maximum speeds compare to orbital velocity?
For further reading:
- Could it be possible to launch a rocket from a balloon?
- What use could be getting to space just for a bit?
- How can Yuri Gagarin's Vostok 1 flight be considered to have been orbital, since he did not go all the way around Earth?
orbital-mechanics project-mercury
asked 1 hour ago
Dr SheldonDr Sheldon
5,27111953
$endgroup$
add a comment |
$begingroup$
As is often said here and in XKCD, an orbit isn't merely high up... it's also going fast. The first two American astronauts -- Alan Shepard and Gus Grissom -- did indeed get "high up" enough to qualify as being in space (well above the Karman line). But their flights were "sub-orbital", and they fell back down before making it all the way around the Earth. Let's see if they were "going fast."
What was the maximum speed each achieved by Shepard and Grissom? (You may use whatever units are convenient.)
What speed would they have needed to acheive orbit?
In percent, how did their maximum speeds compare to orbital velocity?
For further reading:
- Could it be possible to launch a rocket from a balloon?
- What use could be getting to space just for a bit?
- How can Yuri Gagarin's Vostok 1 flight be considered to have been orbital, since he did not go all the way around Earth?
orbital-mechanics project-mercury
asked 1 hour ago
Dr SheldonDr Sheldon
5,27111953
$endgroup$
As is often said here and in XKCD, an orbit isn't merely high up... it's also going fast. The first two American astronauts -- Alan Shepard and Gus Grissom -- did indeed get "high up" enough to qualify as being in space (well above the Karman line). But their flights were "sub-orbital", and they fell back down before making it all the way around the Earth. Let's see if they were "going fast."
What was the maximum speed each achieved by Shepard and Grissom? (You may use whatever units are convenient.)
What speed would they have needed to acheive orbit?
In percent, how did their maximum speeds compare to orbital velocity?
For further reading:
- Could it be possible to launch a rocket from a balloon?
- What use could be getting to space just for a bit?
- How can Yuri Gagarin's Vostok 1 flight be considered to have been orbital, since he did not go all the way around Earth?
orbital-mechanics project-mercury
orbital-mechanics project-mercury
asked 1 hour ago
Dr SheldonDr Sheldon
5,27111953
asked 1 hour ago
Dr SheldonDr Sheldon
5,27111953
asked 1 hour ago
Dr SheldonDr Sheldon
5,27111953
asked 1 hour ago
Dr SheldonDr Sheldon
5,27111953
asked 1 hour ago
Dr SheldonDr Sheldon
5,27111953
5,27111953
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
The Post Flight Mission Report for Grissom's flight compares key parameters for the two manned suborbital missions (Shepard's MR-3 and Grissom's MR-4):
The corresponding document for John Glenn's orbital flight gives its orbital velocity.
Assuming the Glenn number is inertial velocity, the percentages are 28.7% and 29.5%.
edited 19 mins ago
Russell Borogove
91k3303389
answered 42 mins ago
Organic MarbleOrganic Marble
61.6k4167261
$endgroup$
1
$begingroup$
I wanted to add the metric figures (2252, 2310, and 7842 m/s) but couldn't think of a non-intrusive way to do it.
$endgroup$
– Russell Borogove
17 mins ago
$begingroup$
Nice edit. Add a paragraph at the end w/ the other numbers if you like.
$endgroup$
– Organic Marble
13 mins ago
1
$begingroup$
I find it interesting that what we'd call "ascent" they called "exit".
$endgroup$
– Organic Marble
5 mins ago
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
The Post Flight Mission Report for Grissom's flight compares key parameters for the two manned suborbital missions (Shepard's MR-3 and Grissom's MR-4):
The corresponding document for John Glenn's orbital flight gives its orbital velocity.
Assuming the Glenn number is inertial velocity, the percentages are 28.7% and 29.5%.
edited 19 mins ago
Russell Borogove
91k3303389
answered 42 mins ago
Organic MarbleOrganic Marble
61.6k4167261
$endgroup$
1
$begingroup$
I wanted to add the metric figures (2252, 2310, and 7842 m/s) but couldn't think of a non-intrusive way to do it.
$endgroup$
– Russell Borogove
17 mins ago
$begingroup$
Nice edit. Add a paragraph at the end w/ the other numbers if you like.
$endgroup$
– Organic Marble
13 mins ago
1
$begingroup$
I find it interesting that what we'd call "ascent" they called "exit".
$endgroup$
– Organic Marble
5 mins ago
add a comment |
$begingroup$
The Post Flight Mission Report for Grissom's flight compares key parameters for the two manned suborbital missions (Shepard's MR-3 and Grissom's MR-4):
The corresponding document for John Glenn's orbital flight gives its orbital velocity.
Assuming the Glenn number is inertial velocity, the percentages are 28.7% and 29.5%.
edited 19 mins ago
Russell Borogove
91k3303389
answered 42 mins ago
Organic MarbleOrganic Marble
61.6k4167261
$endgroup$
1
$begingroup$
I wanted to add the metric figures (2252, 2310, and 7842 m/s) but couldn't think of a non-intrusive way to do it.
$endgroup$
– Russell Borogove
17 mins ago
$begingroup$
Nice edit. Add a paragraph at the end w/ the other numbers if you like.
$endgroup$
– Organic Marble
13 mins ago
1
$begingroup$
I find it interesting that what we'd call "ascent" they called "exit".
$endgroup$
– Organic Marble
5 mins ago
add a comment |
$begingroup$
The Post Flight Mission Report for Grissom's flight compares key parameters for the two manned suborbital missions (Shepard's MR-3 and Grissom's MR-4):
The corresponding document for John Glenn's orbital flight gives its orbital velocity.
Assuming the Glenn number is inertial velocity, the percentages are 28.7% and 29.5%.
edited 19 mins ago
Russell Borogove
91k3303389
answered 42 mins ago
Organic MarbleOrganic Marble
61.6k4167261
$endgroup$
The Post Flight Mission Report for Grissom's flight compares key parameters for the two manned suborbital missions (Shepard's MR-3 and Grissom's MR-4):
The corresponding document for John Glenn's orbital flight gives its orbital velocity.
Assuming the Glenn number is inertial velocity, the percentages are 28.7% and 29.5%.
edited 19 mins ago
Russell Borogove
91k3303389
answered 42 mins ago
Organic MarbleOrganic Marble
61.6k4167261
edited 19 mins ago
Russell Borogove
91k3303389
edited 19 mins ago
Russell Borogove
91k3303389
edited 19 mins ago
Russell Borogove
91k3303389
91k3303389
answered 42 mins ago
Organic MarbleOrganic Marble
61.6k4167261
answered 42 mins ago
Organic MarbleOrganic Marble
61.6k4167261
answered 42 mins ago
Organic MarbleOrganic Marble
61.6k4167261
61.6k4167261
1
$begingroup$
I wanted to add the metric figures (2252, 2310, and 7842 m/s) but couldn't think of a non-intrusive way to do it.
$endgroup$
– Russell Borogove
17 mins ago
$begingroup$
Nice edit. Add a paragraph at the end w/ the other numbers if you like.
$endgroup$
– Organic Marble
13 mins ago
1
$begingroup$
I find it interesting that what we'd call "ascent" they called "exit".
$endgroup$
– Organic Marble
5 mins ago
add a comment |
1
$begingroup$
I wanted to add the metric figures (2252, 2310, and 7842 m/s) but couldn't think of a non-intrusive way to do it.
$endgroup$
– Russell Borogove
17 mins ago
$begingroup$
Nice edit. Add a paragraph at the end w/ the other numbers if you like.
$endgroup$
– Organic Marble
13 mins ago
1
$begingroup$
I find it interesting that what we'd call "ascent" they called "exit".
$endgroup$
– Organic Marble
5 mins ago
1
1
$begingroup$
I wanted to add the metric figures (2252, 2310, and 7842 m/s) but couldn't think of a non-intrusive way to do it.
$endgroup$
– Russell Borogove
17 mins ago
$begingroup$
I wanted to add the metric figures (2252, 2310, and 7842 m/s) but couldn't think of a non-intrusive way to do it.
$endgroup$
– Russell Borogove
17 mins ago
$begingroup$
Nice edit. Add a paragraph at the end w/ the other numbers if you like.
$endgroup$
– Organic Marble
13 mins ago
$begingroup$
Nice edit. Add a paragraph at the end w/ the other numbers if you like.
$endgroup$
– Organic Marble
13 mins ago
1
1
$begingroup$
I find it interesting that what we'd call "ascent" they called "exit".
$endgroup$
– Organic Marble
5 mins ago
$begingroup$
I find it interesting that what we'd call "ascent" they called "exit".
$endgroup$
– Organic Marble
5 mins ago
add a comment |
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