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Gadget Freak Case #223: Rocket Records Its Own Flight
8/10/2012

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Doug uses a launch pressure of 45psi for the flights, which typically last 7.1-7.4 seconds.
Doug uses a launch pressure of 45psi for the flights, which typically last 7.1-7.4 seconds.

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JRThro
User Rank
Iron
Re: Safety?
JRThro   8/13/2012 2:16:41 PM
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I'm embarrassed to admit that I did not read your entire article, and I withdraw my safety-related objections.

I've already deleted one of my comments, and will also delete the other one.

Sorry about this!

78RPM
User Rank
Gold
An affordable alternative to copters
78RPM   8/13/2012 4:34:54 PM
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For aerial views this is an affordable alternative to Hexakopters -- just without the GPS control and RC.

For safety we could consider fiberglass and resin shield loosely placed around the launcher.  And one could wrap 20 or 30 turns of fiberglass string helically around the rocket body in both directions and secure it with glue or resin.

William K.
User Rank
Platinum
Rocket design variations
William K.   8/13/2012 9:25:27 PM
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For starters, the pressure drop across that valve, as shown, is quite a lot. Substituting a ball valve will improve the range quite a bit, and also save quite a few dollars, in addition to making the system independant of external power.

I built a system that used a discarded carbon-dioxide fire extinguisher tank, rated for 1800 PSI, which provided me with a better safety factor. I use a similar bicycle tire pump, which can provide over 120PSI air pressure. This allows things to fly much higher, and makes the flights much longer.

Charles Murray
User Rank
Blogger
Re: Panoramic views
Charles Murray   8/13/2012 10:17:29 PM
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Rocket Boys is one of my favorite movies because it makes a young, aspiring engineer look like a normal child instead of socially-awkward geek. Also...the video from this article appears to be taken in an area much like Coalwood in the movie.

dconner
User Rank
Iron
Re: 360 degree video
dconner   8/13/2012 11:56:53 PM
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The 360 degree video technique you linked to would make an interesting image of the flight area. If I had a camera with higher resolution it would be more practical. With the camera I have the resolution seems barely adequate for the field of view that I'm using.

John Duffy
User Rank
Gold
Re: Panoramic views
John Duffy   8/14/2012 12:17:51 AM
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I very much agree, though I prefer the book. 

Mydesign
User Rank
Platinum
Re: 360 degree video
Mydesign   8/14/2012 12:20:37 AM
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1 saves
Dconner, interesting project: I hope nobody misuse this project idea for spying to neighbours house or compound. I think this project is good for a short term surveillance purposes.

John Duffy
User Rank
Gold
Re: 360 degree video
John Duffy   8/14/2012 12:20:47 AM
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I like the use of an air cannon instead of rockets.  I built a similar device, though mine is more of a giant tube.  Also, how can you determine launch speed, and can you do so using a camera not mounted on the rocket itself?  I want to see how fast the one I built shoots nerf darts.  All I know now is that they can punch through an aluminum can like nothing.  Anyway, I also like the idea of putting a camera on the rocket, as I've only seen that with commercial rockets that use solid fuel rockets to fly, not something like this.  

Mydesign
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Platinum
360 degree video with transmission of images
Mydesign   8/14/2012 12:25:18 AM
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Dconner, if you are able to fix it with a 360 degree camera and sending the captured images at real time scenario with the help of small wifi transmitters are interesting. Then the project resembles like a miniature of NASA's Mars mission curiosity.

notarboca
User Rank
Gold
Re: Panoramic views
notarboca   8/14/2012 12:40:27 AM
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@Charles Murray-- Hooray for "Rocket Boys"!  One of my favorite books and movies after "Apollo 13".  Just as an aside, I wandered into the Engineering section of a tiny bookstore in Boca Raton, FL when, much to my surprise, I found a 1st edition of "Principles of Guided Missile Design".  The very same book from which Homer and the Big Creek Missile Agency learned their fundamentals!  I bought it no questions asked.

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