They were very close to an airforce jet. That isn't orbit. If they could make it from there into orbit running only on reserve power, they can make it from the ground into orbit on full power.Cruising leisurely (or actually in a decaying orbit if I recall correctly) across the sky as in Tomorrow is Yesterday in the lateral direction that her impulse engines would send her is not the same means as lifting her up into a mounted surface-to-air trajectory.
This is entirely an assumption on your part, and is not supported by anything we've ever seen on screen. Also, you seem to be assuming that they'd use the impulse engines, but that is clearly overkill for take-off. They'd use the thrusters.Now if they had an angled launch ramp (to account for the mounted direction of her impulse engines, and thus direction of thrust), maybe, but again, to my own perhaps limited knowledge, the impulse engines are not designed to deliver that type of atmo planetary gravity breaking thrust from a static start.
Again, it will be interesting to see what they come up with. I just hope that it takes some consideration into established concepts.
There are no established concepts addressing this, except for ones which support that the ship can operate just fine in atmosphere even without main power. Abrams is free in this regard to say anything he wants without contradicting anything.
Fair enough ancient, I respect your take. I don't necessarily agree with all of it, but I can see as much validity in it as I do in my own take eh.
And yes, I was only sharing my mechanical perceptions on the subject. It was not my intention of touting them as canon. Again, as long as it's believable, I'm cool with it. The thrusters are just attitude adjusters to me though, so that explanation doesn't work for me, but that's just for me eh.
Nice chattin' about it though.

deg