N2EY wrote:
In article , Leo
writes:
On 18 Nov 2004 11:11:05 GMT, PAMNO (N2EY) wrote:
In article , Mike Coslo
writes:
Leo wrote:
On Mon, 15 Nov 2004 21:24:23 -0500, Mike Coslo
wrote:
Leo wrote:
On Mon, 15 Nov 2004 19:50:46 -0500, Mike Coslo
wrote:
Len Over 21 wrote:
It's times like this that can bring people together. You and
Brian
Kelly have something in common.
Realism?
Perhaps you could tell me, Leo? I've shown that it can and does happen
and that a lot of people are doing exactly what I speak of on a regular
basis. Believe or don't believe. It is your choice.
Mike, my point was that you have two folks with a fair amount of
knowledge and experience taking the time to give you feedback.
Who are they, Leo?
...um, Len and Brian, IIRC.....did you forget?
What experience do either of them have launching radio-carrying balloons to
100,000 feet or more?
And you, of course - cheerleading for Mike, as usual.......
You said "two folks who have a fair amount of knowledge and experience". I
would make three - except I claim no experience in high altitude ballooning at
all.
I'll have lots of experience before too long! ;^)
Is there something wrong with expressing a positive attitude towards the idea,
and offering encouragement while *simultaneously* pointing out where the
problems may be?
The best way to get things done!
Who on this newsgroup has even attempted to launch a radio-carrying ballon
to 100,000 feet? Or even to half that?
Why should that matter?
When someone says it cannot be done.....
Especially when it is being done with some regularity....
You yourself have posted on many topics where
you have no empirical experience, just your own knowledge and various
articles that you have read......including this one!
True enough!
Seems to me like the way the academic field works. Someone wants to do
something, another say, "Hey! I read an article by so and so, and she
says that.........
And this is a bad thing - how?
A lack of
hands-on experience has not held you back......why should it apply
differently to others?
Have I said *anyone* should not post here?
I think Leo believes that I should simply accept that some people think
that I cannot do this, and simply slink away. I do reserve the right to
reply (and to not be too happy about it) when I am called incompetent!
Sorry Leo - it works both ways! 8^)
Amazingly enough, the laws of physics are absolute. Paper airplane,
high speed jet , spitball or balloon - the same physical laws apply to
all.
Of course.
I wonder what a spitball falling from 100,000 feet would do? ;^)
Just like you learned in engineering school.....(?)
I also learned that preconceptions are often wrong and so are models based on
inadequate information and a lack of understanding of *all* the relevant
physics. This has been proven time and again in the history of engineering.
I've always found it hard to believe that a few square inches of brake
lining can stop a bog car. Seems impossible!
No special dispensation is available for good intentions, amateur
radio or raw motivation and determination - they are absolute.
What laws of physics absolutely prevent Mike from succeeding? From what I've
seen and calculated, his main limitation may be airspace regulations here in
EPA - a place where I do have some empirical experience.
And that is one of the big considerations.
They
aren't saying that you're nuts to be considering doing what you intend
to do, but they are offering you the benefit of their understanding of
engineering and physics as it pertains to your project.
Perhaps we've been reading different posts...
I respectfully suggest that you've been too busy (once again)
focussing on the poster rather than the material posted.
You mean the way Len says something rather than what he says?
Because we can have a civil discussion?
I think some people assume that the newsgroup is only for arguments and
antagonistic behavior.
Jim, whether
you happen to like or agree with the messenger or not, the laws of
physics could care less! They remain absolute.
What laws of physics absolutely prevent Mike from succeeding?
The trick here is finding a way to accomplish the task within physical
law. In engineering, this requires a rigorous analysis of all facets
of the problem at hand - a list of problems impeding the design goal
is developed, and solutions are proposed for each until all have been
satisfactorily resolved.
Engineering 101, freshman years stuff.
Jim, can you honestly say that as an engineer that you have solved all
the problems on any project satisfactorily? Or have you accepted the
results and wanted to do better?
By the above definition, engineering tasks would probably never get done.
The posts that we saw earlier were the
beginnings of the issues list - responding to it with "it's been done,
it'll work, no problemo!" - type platitudes ain't going to resolve the
issues - it's just wishful thinking. Or perhaps no thinking at all.
No, it isn't.
Not to mention, I never said those words in quotes! I don't know why
I'm attributed to saying things I never said!
When an attempt is made to do something for the first time, there's always the
possibility that it simply cannot be done, or cannot be done with the available
resources. Or that there are factors no one has considered.
But once a thing is actually done for the first time, it's a different ball
game completely, because now we *know* it's possible.
Classic example: In the very early 1920s, the very best knowledge of the
physics of radio waves predicted that it was *essentially impossible* to
communicate across the Atlantic with the power levels, wavelengths, antennas
and receiver sensitivity then available to amateurs.
The problem was that the models used did not take ionospheric refraction into
account. And so amateurs showed it could be done, and soon the "shortwaves"
were in worldwide use.
Now I'm not saying that the physics of ballooning isn't well understood! I'm
just saying that since it has been done already, some of the commentary against
Mike's idea rings very hollow.
Has me stumped!
If they are missing something (and me too, perhaps - this sure ain't
my area of expertise either!), then by all means show them where
they're wrong - but they are both pretty intelligent, educated and
knowledgeable guys, with years of real-world experience in their
fields - maybe worth at least a rational discussion? Or you could
throw a bunch of web references in their faces and get angry....
Your call.
Leo,
There is a world of difference between someone like Jim, who questions
and looks at my answers, and one member that says what I am considering
is impossible, and yet another that calls me incompetent.
At least two out the three are willing to look at the websites.
And there is a lot of difference between me illustrating my points wit
web references, and finally getting annoyed after I am called incompetent.
Considering that to Len, this is an impossible task, and that Brian
Kelly has thinks I'm an idiot that is only suited for cheerleading, I
would have to say that they probably don't have anything to offer me in
my doomed project with which I am going to hurt someone.
My call.
The websites offer a lot of evidence that it can be done, has been done and
even how to do it.
Of course it has been done - duh!
Tell it to Len.
What I like (not) is that when I'm told both that it is impossible
(with insinuations as to my lack of knowledge of basic physics), and
again with a direct comment as to my lack of competency, I am somehow
the petulant one.
I do want to get beyond this, but it goes both ways.
The issue here is simply how the
various obstacles standing in the way of success have been overcome.
The first question is if they are obstacles at all.
I recall commentary on how expensive helium allegedly is. Then I did a little
research and found that it's about 20 cents a cubic foot when bought in
quantities of about 300 cubic feet or greater. So for a thousand-cubic foot
balloon, we're talking maybe $200 worth of helium. That's a bit of money but
not a showstopper.
Referring folks who raise technical concerns to a pile of websites
merely demonstrates an inability to articulate the technical knowledge
that is ultimately required to accomplish a plan such as this.
How?
1. He would hate academic documents. references- pages of them!
2. Besides, I think that NASA has a very nice graphic and description
of the atmospheric layers.
3. In the complicated many faceted world we live in today, it is
sometimes more important to know where to FIND knowledge than to have
all the knowledge there is (which is BTW, impossible)
The websites show what has already been done. By *amateurs*. Their methods and
solutions form a starting point.
One thing I learned in engineering school was not to reinvent the wheel.
Makes
one wonder ho deep an understanding one would possess to reply in this
manner! I'd suspect not too deep.......not much past the "sounds
pretty cool!" stage of the project).
If it doesn't "sound pretty cool", why do it at all?
One of the things I HAVE to do is sell this concept to people. Even as
strange as this rrap experience has been is that although I have not
encountered it so far in the real world, I must realize that there will
probably be people that simply refuse to believe that we can do this for
one reason or the other.
I may run into a flat earther here and there.
One can read on various websites a plethora of interesting scientific
information - actually doing it is quite something else.
That's my point.
And doing it will be exceptionally cool. (pardon my enthusiasm)
Who should have greater credibility - the person who has done it or the person
who sits on the sidelines and says it can't be done?
The plans to
construct an atomic bomb take up but a few pages on the Web - but
actually building one might be just a bit more difficult than the
relatively simple documentation would lead one to believe......lol!
;-)
If Mike was not interested in discussing this topic at a detail level,
then perhaps it was a bit unwise to post it in a public newsgroup -
unless there was some other reason for doing so......? Wonder what
that might be.....! hmmmmm - Rah Rah Rah, Sis Boom Bah......
y'think?
Perhaps he *is* interested in discussing it at a detail level. But the
negeative criticism makes that difficult.
After all, Mike could actually launch a balloon - and no matter what the
results were, some would decry it as a "kluge". And if it only made it to, say,
98,500 feet, the mission would be described by some as a "failure".
I just think it's worth a try.
Lets back up a little bit here, and see if I can salvage something here.
My main job in this whole project has been to SELL people on the
concept of something that is not particularly new, but has been made
more interesting by a fusion of Ham radio, GPS, Packet radio, and
Schools, or perhaps more accurately, youth in general.
The concept is to put volunteers to playwork in sending a payload in an
appropriate container to the shoreline between earth and space, where
the conditions are not like the area that we inhabit. It's cold, there
is almost no atmosphere, there is a lot of radiation, and it is fairly
near the ionized area of the atmosphere.
These conditions make it an interesting place to go to. How do we go
there? Weather balloons provide a tantalizing clue. These latex balloons
are launched on a daily basis by various weather agencies, mostly NOAA,
but also at others. Since this happens so often, the authorities (FAA)
and the launchers of the balloons have worked out a system that allows
this to happen. A science balloon launch will just add one more to the mix.
Another consideration is that the FAA no longer cares about the payload
after it has reached 60,000 feet. That is the top end of their "airspace".
During launch day, you will call them at launch, at 60,000 feet when
they leave airspace, and on descent when they renter airspace at 60,000
feet, then again at landing. This means the balloon spends less time in
the path of harm than it might appear at first.
As the payload grows in weight, the regulations become more involved.
While still relatively accommodating, it is a powerful incentive to keep
the payload light.
How is this done? The payload is often made of a material such as
household insulation. Styrene insulation is quite light, and provides
good insulation against the cold.
Small versions of electronics are usually used. In the quest for weight
reduction, cases are often stripped, and the chassis are mounted
directly on the foam. For VHF and UHF communications, not a whole lot of
power is needed for the transmitters. A 300 mw "credit card" HT is often
the transmitter of choice.
Power being a consideration. Lithium batteries are the power of choice,
due to lightness. Anywhere that power can be conserved is worth looking at.
I can go into Foxhunting techniques for landing, but I suspect most
here would know about that already.
What's so bad about this?
- Mike KB3EIA -