[Balloon-makers] RV: micro-solenoid valve

[Alejandro Garcia]

Hello Kyle,
I am Alex from Mexico City.
You can buy a electronic book of Radio Control Hot Air Balloons for 30
dollars.
I have it in pdf format, but, the Owner, Jim, works hard to have it and I
can't send it if he doesn't permit me do it.
In this book, you have plans, distributors of all things that you need to
make your own balloon, and step by step to finish it.
Is wonderful.
The web page of Jim is: http://www.dreambuiltdesigns.com/
I don't know if this is his eamil yet: onestop at dreambuiltdesigns.com
At this moment I have RC 2 balloons, one 12 feet tall and another 1/6 scale,
6.8 feet tall.
You can see my balloons in http://www.bscale.com/noticias.htm and
http://www.bscale.com/toc.htm
Is in spanish, but, the photos tell more than words.
The blue balloon is inside my home and the Action figure is a 1/6 bbi figure
12" tall.
I have more photos and I will be happy if I can help you.
I'm trying to read all mails, but, I'm very busy at this moment and today I
read mails from 10 days ago.
Best Regards,
Alex
 

  _____  

De: balloon-makers-bounces at taleos.com
[mailto:balloon-makers-bounces at taleos.com] En nombre de Kyle Kepley
Enviado el: Sábado, 27 de Diciembre de 2008 22:58
Para: Noah Forden; balloon-makers at taleos.com
Asunto: Re: [Balloon-makers] FW: micro-solenoid valve


Germany really does seem to be the hotbed for RC balloons.  Those pictures
of RC balloon rallies look just like a real rally.  If it weren't for the
people standing near the balloons and giving away their scale, you'd think
you were looking at full sized balloons.  Some German students were also the
first to fly an RC steam balloon a while back.  It was actually more of a
rozier type design using steam rather than helium, so they had a propane
burner also.  Here's a link to their project:

http://www.heidas.net/

I did use a stainless alloy for my burner tubes, and the valve and other
fittings were brass so maybe that was the problem.  I don't remember what
the alloy was, but it was something I found mentioned in the Balloon
Builders Journal so I bought a length of it from McMaster.  I was also
having to take it apart and put it back to gether several times while
building it as changes were made.  The more I had to reassemble the
compression fittings, the more they tended to have leak problems.  I don't
believe any instructions came with the actual valve.

The propane torch head was actually working for me with liquid propane fed
into it.  It seemed to operate just like it normally would with vapor. I
just had one camping cylinder mounted upside down and then both the pilot
and burner were operating on that.

I could design a circuit to get rid of the servo and micro switches, I'm
just being lazy.  I've looked at the square wave output from the receiver on
a scope and seen how they are just varying the pulse width to control
position.  I'll spend time on that once I figure out if the overall design
is going to work.

Right now I've got the panels all cut and have come face to face with this
sewing machine which I have no clue how to use!

-Kyle


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