Re: Magnetic levitation for launch ?

in article 7Mc8f.1080$m81.952@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, Greg D.
Moore (Strider) at mooregr_deleteth1s@xxxxxxxxxxx wrote on 10/27/05 3:45 PM:

> "George Evans" <georgee3@xxxxxxxxxxxxx> wrote in message
> news:BF869742.DEB%georgee3@xxxxxxxxxxxxxxxx
>
>> in article d1e60f7f9a3fe72d2e0df9ba041bde60@xxxxxxxxx, Nomen Nescio at
>> nobody@xxxxxxxxx wrote on 10/26/05 5:40 PM:
>>
>>> Another small detail overlooked in this discussion is Newton's Law of
>>> Reaction. Mag-Lev launches in a tangential direction, as in trains, cancel
>>> out; that is, the trip going cancels the reaction of the trip coming.
>>>
>>> Such would not be the case in vertical launches. As the number of launches
>>> rise, the destabilizing effect on the Earth's rotation and/or orbit would
>>> soon be felt. Who would accept a changing period for a year or day as a
>>> fair exchange for saving a few loads of rocket fuel?
>>>
>> Nonsense. This is an infinitesimal concern and only if all the launches
>> happen at around the same local time. Theoretically a launch at sun up would
>> exactly cancel the rotational effects of a launch at sun set.
>>
> Umm, perhaps the orbital impact, but not the rotational one.

Oops, you're right, I got my rotation mixed up with my revolution. The two
launches would cancel revolution-wize. Two vertical launches would have no
rotational effect.

George Evans

.