[amsat-bb] Re: Thought experiment ... Rockets and balloons

[Joe]

Actually it is a larger fraction than you would think. Because of 
Atmospheric Drag.

Joe WB9SBD
Sig
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On 9/18/2013 12:59 PM, Bryce Salmi wrote:
> It's to my understanding that the Rockoons didn't go to orbit, but did
> reach space with ballistic trajectories. The hard part with orbit is the
> pure speed needed. RIT had a
> program<http://www.rit.edu/kgcoe/electrical/meteor/meteor/Home.html>for
> an orbital rockoon type project called METEOR a while back but it has
> since been ended. I believe the advantages of launching from 30+ km
> altitude are quickly outweighed by the added complexity of the system as a
> whole. In the end the rocket fuel for most orbital rockets needed to get to
> 37km altittude is a small fraction of the total fuel on board anyways.
>
> my $0.02
>
> Bryce
> KB1LQC
>
>
> On Wed, Sep 18, 2013 at 10:30 AM, Joe <nss at mwt.net> wrote:
>
>> It's called a Rockoon, and has been done before, google it.
>>
>> Thing is now days it's launch would have to be permitted by the government
>> just as much as any other major rocket flight. or get out of the USA like
>> into the gulf of mexico to do the launch.
>>
>> Joe WB9SBD
>> Sig
>> The Original Rolling Ball Clock
>> Idle Tyme
>> Idle-Tyme.com
>> http://www.idle-tyme.com
>> On 9/18/2013 12:01 PM, Rob wrote:
>>
>>> I'm not a rocket scientist but I have an active imagination .....
>>>
>>> Thinking of a recent XKCD .... to achieve orbit .... the hard part isn't
>>> the altitude it's the velocity ....
>>>
>>> Would there be any advantage (cost effective) carrying a launch vehicle
>>> say
>>> to 37KM ... think Red Bull Stratos .... and firing the engines there???
>>>
>>> So you're already 37KM up .... there's a lot less atmospheric drag ....
>>>
>>> This would be like a drop from a plane ... but even higher ....
>>>
>>> Thoughts???
>>>
>>> de KA2PBT
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