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  #1  
Old 04-27-2009, 08:17 PM
dragonbat13 dragonbat13 is offline
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Default Estes Ram Jet Project

Being A BAR, I want to build another ram jet. It doesnt seem that there is too much interest in this kit.

I was thinking of finding a kit and upscaling it. what all is involved in an upscale?

Does anybody know how hard it is to find the ram jet kit from estes to start off with?

If any other members built a ram jet, how did it turn out.

It was by far the coolest rocket build I did as a kid, although mine never flew NO MONEY.

Here is a link to the classics page of the ram jet.

http://www.spacemodeling.org/jimz/est1994.htm
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  #2  
Old 04-27-2009, 09:09 PM
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CPMcGraw CPMcGraw is offline
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If you have RockSim, doing an upscale would be simple. The latest version has a "scale-up/scale-down" feature on the fins, so if you have the original dimensions, you'd draw in the original pattern, then multiply (or divide) by the scale factor.

Locating a scaled-up nose cone is probably just as easy, you simply figure in what the BT size would be, then get a length, then head over to SEMROC and see if there's one that matches or comes close.
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Last edited by CPMcGraw : 04-28-2009 at 01:42 AM. Reason: I spelt sumthin' rong...
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  #3  
Old 04-27-2009, 09:51 PM
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SEL SEL is offline
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Quote:
Originally Posted by dragonbat13
Being A BAR, I want to build another ram jet. It doesnt seem that there is too much interest in this kit.

I was thinking of finding a kit and upscaling it. what all is involved in an upscale?

Does anybody know how hard it is to find the ram jet kit from estes to start off with?

If any other members built a ram jet, how did it turn out.

It was by far the coolest rocket build I did as a kid, although mine never flew NO MONEY.

Here is a link to the classics page of the ram jet.

http://www.spacemodeling.org/jimz/est1994.htm


The Ram Jet generally goes for ~35.00 - 50.00 on ebay. Here's a link to the last one sold < http://cgi.ebay.com/Estes-Ram-Jet-K...%3A1%7C294%3A50 >

S.
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Old 04-27-2009, 11:07 PM
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DaveR DaveR is offline
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Location: North MS
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Quote:
Originally Posted by dragonbat13
Being A BAR, I want to build another ram jet. It doesnt seem that there is too much interest in this kit.

I was thinking of finding a kit and upscaling it. what all is involved in an upscale?

Does anybody know how hard it is to find the ram jet kit from estes to start off with?

If any other members built a ram jet, how did it turn out.

It was by far the coolest rocket build I did as a kid, although mine never flew NO MONEY.

Here is a link to the classics page of the ram jet.

http://www.spacemodeling.org/jimz/est1994.htm


Interesting you bring this up, barone and I were discussing the Ram Jet this past Saturday. He had an original with him that looks very nice (post a pic Don ) I had one years ago, I always liked that kit. Anyway, we agreed that an upscaled Ram Jet would be cool.
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  #5  
Old 04-28-2009, 10:12 AM
dragonbat13 dragonbat13 is offline
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I am going to find a kit to build and take measurments off of. Then build an upscale of it. It will take me quite awhile so instead of leaving everybody in suspense (Yea Right) I am going to try and build a good thread once I have the project going well.

Thanks for checking out my thread.
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  #6  
Old 04-28-2009, 12:19 PM
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A Fish Named Wallyum A Fish Named Wallyum is offline
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Quote:
Originally Posted by dragonbat13
I am going to find a kit to build and take measurments off of. Then build an upscale of it. It will take me quite awhile so instead of leaving everybody in suspense (Yea Right) I am going to try and build a good thread once I have the project going well.

Thanks for checking out my thread.


This shows the parts you would need for a stock model:
http://www.semroc.com/Store/scripts...arts.asp?ID=327

This will be of help in interpreting the parts codes:
http://www.ninfinger.org/rockets/body_tubes.html

Interesting choice for an upscale because of the two body tube sizes.
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  #7  
Old 04-28-2009, 12:22 PM
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A Fish Named Wallyum A Fish Named Wallyum is offline
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Forgot this. You'll need it for the fin pattern.
http://www.spacemodeling.org/JimZ/est1994.htm
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I was SAM 0058
2017 motor usage: 1/4A - 2, 1/2A - 3, A - 31, B - 11, C - 7, D - 2, E - 2 = Total Impulse: 278.181 Ns

On the bench: Semroc Satellite Killer, Custom Ion Pulsar, Semroc Cyber III, Coaster Saturn, Coaster Space Probe 1, RDC Starflite

Ready to fly: Estes Javelin, Estes Super Flea, Custom Satellite Drone, MRN Loadlifter 1-A, Estes Astron X-Ray
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  #8  
Old 04-28-2009, 03:41 PM
dragonbat13 dragonbat13 is offline
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[/QUOTE]Interesting choice for an upscale because of the two body tube sizes.[/QUOTE]


Thats one of the first problems I am going to address. It may not be an exact upscale. may have to make it work. After I purchase ROCSIM I will get much farther ahead.

But hey in my opinion it aint worth building if it isnt a challenge!
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  #9  
Old 04-28-2009, 04:16 PM
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A Fish Named Wallyum A Fish Named Wallyum is offline
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It shouldn't too difficult, just interesting. I think I remember seeing an upscale of this one a while back, but it might have been on the old TRF, which means it's probably gone, but it might be worth a search.
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http://wallyum.blogspot.com/

I was SAM 0058
2017 motor usage: 1/4A - 2, 1/2A - 3, A - 31, B - 11, C - 7, D - 2, E - 2 = Total Impulse: 278.181 Ns

On the bench: Semroc Satellite Killer, Custom Ion Pulsar, Semroc Cyber III, Coaster Saturn, Coaster Space Probe 1, RDC Starflite

Ready to fly: Estes Javelin, Estes Super Flea, Custom Satellite Drone, MRN Loadlifter 1-A, Estes Astron X-Ray
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