Author Topic: Model Rockets!  (Read 764 times)

Offline AceHavok

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Model Rockets!
« on: January 10, 2012, 03:44:32 PM »
Hi all,

I just started getting into building model rockets. :) I haven't built anything to complex yet, only really the skill level 1 Este's rockets. Just wanted to see if anyone else builds rockets. :)


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Offline greens

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Re: Model Rockets!
« Reply #1 on: January 10, 2012, 03:48:14 PM »
in jrhigh i was the first eskimo to put a fly in outter space
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Offline curry1

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Re: Model Rockets!
« Reply #2 on: January 10, 2012, 03:57:24 PM »
I have built many estes rockets.  Nothing extremely complex like multistage but have hand made quite a few.  Hand made I mean taken the kits from scratch and balsa wood and put them together.  I have only built one from complete scratch.  Basically I would fly them until they failed in a ball of fire or a technical malfunction normally the parachute.  They are just too damn cheap to take seriously so I never like pre-flighted them much.  Haha.
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Offline Penguin

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Re: Model Rockets!
« Reply #3 on: January 10, 2012, 04:27:49 PM »
If the fuel isn't too expensive (I've heard that sugar can work well if mixed with potassium nitrate) you can make a backyard MLRS. 

For 2" rockets:

Buy 4 2"x3' PVC tubes
Buy 4 2" rubber O-Rings
Take a shoebox and glue the top down
Cut four two inch holes out in both small faces in a square formation
Insert the tubes so that the shoebox is in the middle and make sure that they are level with each other.  Check for fit.
Slide the tubes out just far enough that you can pour sand mixed with Elmer's glue into the shoebox using a funnel (50% Sand, 40% Glue)
Slide the O-Rings onto the other end of the tubes to prevent leaks
Pour the sand in until the shoebox is full
Quickly push the tubes back through the shoebox until its in the middle, and be careful to keep the sand out of the inside of the pipe.  Quickly scrub any that's inside the pipe away.
Take some Super Glue and glue the O-Rings in place
Voila, you have a four-shot reloadable rocket launcher

How well would this work?

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Offline F22RaptorDude

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Re: Model Rockets!
« Reply #4 on: January 10, 2012, 04:32:22 PM »
Planning on strapping 3 rocket engines to the back of my car when I get some new parts for the left tire, I kinda smashed it again...
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Offline PFactorDave

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Re: Model Rockets!
« Reply #5 on: January 10, 2012, 04:43:02 PM »
When I was in college, my room mate and I launched one of these...



We used 5 estes rocket motors, I don't recall the size.  We added three fins, canted at about 15 degrees to cause the rocket to spin around its centerline to stabilize it (since it was of irregular shape).  And we built a launching pad that held the rocket on the pad for just a split second, so all 5 motors would be burning before we released it.

The launch was beautiful.  Straight up for about 100 feet.  I wish I had video of it, but it was 1989 and video cameras were a lot harder to come by then and we were poor college kids.

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Offline Maverick

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Re: Model Rockets!
« Reply #6 on: January 10, 2012, 05:32:16 PM »
I did small rockets very briefly when I was a kid, no money to continue so dropped the hobby. Later when I was student teaching the 6th grade I had a rocketry module. I put the class into teams and each team got a kit to build.  They had minimal materials but did have some extra balsa wood sheets for mods. Most went OK. One kid built a big rocket at home. It was the only one that didn't launch. Well the motor lit off but it kinda flew out the nose of the rocket leaving the rest on the pad. He'd been building them for a couple years with his dad. He was kinda embarrased.
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Offline icepac

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Re: Model Rockets!
« Reply #7 on: January 10, 2012, 06:15:06 PM »
I took rocketry classes at the miami museum and planetarium.

Jack Horkheimer (the star hustler) was the teacher.


Offline Terror

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Re: Model Rockets!
« Reply #8 on: January 10, 2012, 09:03:02 PM »
Launched this a few years back.  Computer models put it at over 5300' on a K135 reloadable motor!!  My level 2 Certification flight!



Some links for ya!

http://www.nar.org/
http://www.tripoli.org/

Have fun!

T

Offline flight17

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Re: Model Rockets!
« Reply #9 on: January 10, 2012, 09:21:35 PM »
Lol i had a small model that was called the Blue (something, i think maybe moon?). It only got a few hundred feet in the air. I have a large model now that uses the big engines that you have to be 18 years old to get and are behind the counter, but i never flew it. Its sitting out in my garage ready to go. My engines are sitting in my room (maybe i should get them out of the house lol) on my shelf. Its supposed to go up about a 1000ft IIRC.

When i lost my little on, i had the bright idea one day to may a cardboard rocket from scratch. I used a foot long paper towel tube. I rapped the small engine in foil to insulate it from the cardboard, i taped on some paper plate cutout fins and launched it. It worked fine for about 50ft then it started to tumble and flew into the ground and burned lol... it didn't even have a parachute.

As a kid, one of my modeling dreams was to rig up a Space shuttle rocket set. I would build the SRB's to be real rockets and have a foam main tank and then i would have an RC model Shuttle. After the vertical launch, i would then separate the Shuttle and fly it off as an RC. It was going to have 3 ducted fans in it for its engines. That would have been cool and is still a small dream i have, but i probably never will do it.
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Offline M0nkey_Man

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Re: Model Rockets!
« Reply #10 on: January 10, 2012, 09:28:56 PM »
tried model rockets once, was fun until the parachute didn't come out and I ended up with a pile of broken crap :cry
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Offline Blooz

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Re: Model Rockets!
« Reply #11 on: January 10, 2012, 10:07:57 PM »
I was so poor I bought model rocket engines and just glued fins to them. Cheap flying!
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Offline flight17

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Re: Model Rockets!
« Reply #12 on: January 10, 2012, 10:54:15 PM »
I was so poor I bought model rocket engines and just glued fins to them. Cheap flying!
:rofl :rofl :rofl :rofl :rofl :rofl :noid :rofl :rofl :rofl :rofl :rofl :rofl
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Offline F22RaptorDude

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Re: Model Rockets!
« Reply #13 on: January 10, 2012, 11:34:11 PM »
I was so poor I bought model rocket engines and just glued fins to them. Cheap flying!
:rofl :rofl :rofl Thats how I made air soft grenade launchers, me and my friends later banned use of em due to rockets hitting people in the face and burning hands and gun finish's
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Offline rpm

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Re: Model Rockets!
« Reply #14 on: January 11, 2012, 02:57:37 AM »
You're in good company...


I believe Estes was big into rockets if he's still posting here. I'm sure he could give you some pointers.
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