To add comments or start new threads please go to the full version of: Angle of Shuttle blast off
PhysOrgForum Science, Physics and Technology Discussion Forums > General Sci-Tech Discussions > Puzzling questions

Grasshopper
When a shuttle is launched into space, what is the optimum launch angle needed to escape gravity most effectively? Do we shoot for a perpendicular angle from the ground, but gravity causes a curve of the shuttle's path before it leaves the atmosphere? Or do we shoot for more of an acute angle from the ground in order to correct the effect of gravity and accomplish a perpendicular angle from the ground?

Thank you for reading this post.
eccefeles
I would think that a perpendicular launch is the preferable option. To escape gravity, you would want the upwards component of the intial velocity to be maximum, which is achieved by aiming the shuttle straight up.
HybridST
Grasshopper: I was wondering the same thing myself (although orbit is not the same as escaping gravity...)

QUOTE
When a shuttle is launched into space, what is the optimum launch angle needed to escape gravity most effectively?


I googled for the answer using "shuttle+launch+angle" as the search terms and found this page on why the shuttle performs the roll maneuver

A quick visit to wikipedia and some old star trek dialogue (orbital mechanics) got me to this rather detailed and lengthy entry on orbital mechanics showing many of the maths used in that field.

eccefeles: You are correct in saying

QUOTE (->
QUOTE
When a shuttle is launched into space, what is the optimum launch angle needed to escape gravity most effectively?


I googled for the answer using "shuttle+launch+angle" as the search terms and found this page on why the shuttle performs the roll maneuver

A quick visit to wikipedia and some old star trek dialogue (orbital mechanics) got me to this rather detailed and lengthy entry on orbital mechanics showing many of the maths used in that field.

eccefeles: You are correct in saying

To escape gravity, you would want the upwards component of the initial(sic.) velocity to be maximum, which is achieved by aiming the shuttle straight up.


However straight up will lead to straight down once the propellant on the orbiter is depleted. To maintain orbit one needs a horizontal acceleration in combination with the vertical acceleration. To this end I'm linking another wikipedia article but on space mathematics where the formulae to determine optimal launch angle are posted. You can plug in some numbers for yourself and see what happens.



eccefeles
HybridST:

Yes, I seem to have, once again, misinterpreted and overly simplified the question. My solution does in fact correspond only to the part of the launch aimed at getting the shuttle into space, but not what happens afterwards. sad.gif Thanks for pointing it out.
PhysOrg scientific forums are totally dedicated to science, physics, and technology. Besides topical forums such as nanotechnology, quantum physics, silicon and III-V technology, applied physics, materials, space and others, you can also join our news and publications discussions. We also provide an off-topic forum category. If you need specific help on a scientific problem or have a question related to physics or technology, visit the PhysOrg Forums. Here you’ll find experts from various fields online every day.
To quit out of "lo-fi" mode and return to the regular forums, please click here.