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  #511  
Old 07-02-2006, 08:17 PM
James Pierson James Pierson is offline
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Join Date: Dec 2005
Location: Washington State
Posts: 654
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Quote:
Originally Posted by CPMcGraw
If this seems like another variation of a 4FNC with just enough difference not to be, then that's what it is...

I'm at a low point in ideas right now, so just think of this one as my attempt to keep my hand in the game. My model-building concentration has been on finishing up a bunch of models that have been sitting idle for way too long. Trying to create new projects to stack up isn't high on the list...

But as I've said before, I think these simple designs are what get flown more often, so I have to put one or two out there for the simple pleasure of building and flying. It's not made of plastic, at any rate, and it's not an ARF or RTF...


Know what ya mean about low point. I think they call it instead of writers block it's called design block. I think its time Craig went to the dark side of the design world...... Its called Sci-Fi. Sweet!

My favorite Sci-Fi links:

http://www.cube3.com/starbase.htm
http://www.starships.com/SF_LinksP2.HTML
http://www.wolfsshipyard.mystarship.com/drawings.html
http://www.fas.org/man/dod-101/sys/index.html
http://www.designation-systems.net/dusrm/index.html
http://xplanes.free.fr/stato/stato-29.html
http://www.personal.psu.edu/dob104/.../us/qdrone.html
http://www.vectorsite.net/twuav.html

Also Craig, some rockets of mine never get finished or even painted. If my designs are lucky the will at least test fly with some primer. I am not very patient when it comes to a good paint job.

Wishing you the Best, JP

James Pierson
NAR# 77907
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  #512  
Old 07-02-2006, 09:51 PM
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CPMcGraw CPMcGraw is offline
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That link to "Designations Systems" in your list is one I've frequented. It's where I got the data for the AeroBee 150 models...

Watched one of the History / Discovery channels while they were showing "Secret Soviet Fighters", and saw some interesting things that might be possible to model...

I just need to get some of these models in my post-build/pre-primer queue finished to the point of painting. There are some in this stash going back to before the Barclone days started. I just feel the need to finish some, like my Estes Omega and Avenger...
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  #513  
Old 07-02-2006, 09:54 PM
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tbzep tbzep is offline
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I've got a bunch of built rockets that need sealing and sanding, some that have been that way a couple of years. I'm not fond of sanding.
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  #514  
Old 07-02-2006, 11:24 PM
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CPMcGraw CPMcGraw is offline
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Exclamation New Plan -- GQM-163A Coyote

Quote:
Originally Posted by James Pierson
I think its time Craig went to the dark side of the design world...... Its called Sci-Fi. Sweet!


The real-world also has a few "sweet treats" still available. Here's one that I spotted tonight, which has similarities to the Aerobee 150...

The GQM-163A "Coyote", a boosted solid-fuel ramjet. This one gets "coolness" points just for attempting it. Looks really nice, too. Shame to just use it for target practice...

This is scaled to the drawings found on the Designations Systems website. (Addendum) The model is semi-scale, as the fins and air intakes were not dimensioned clearly on the website. The fin shapes are approximations only, but they're close.

Length: 16.5"
Diameter: 1.04" (ST-10)
Fin Span: 4.3"
Weight: 1.5 oz

A8-3......168'......12 FPS
B4-4......385'......10 FPS
B6-4......390'.......6 FPS
C6-5......811'......14 FPS

The model as-depicted is of the upper stage only. I will try to develop a booster to match this model later. The upper section has all of the visual eye-catching appeal...

Enjoy!
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Last edited by CPMcGraw : 07-02-2006 at 11:35 PM.
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  #515  
Old 07-02-2006, 11:32 PM
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CPMcGraw CPMcGraw is offline
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Quote:
Originally Posted by tbzep
I've got a bunch of built rockets that need sealing and sanding, some that have been that way a couple of years. I'm not fond of sanding.


I always sand too far, and wind up having to patch and sand some more. My skills at finishing are...well...abrasive, to say the least...

I'm just tired of looking at them collecting dust and not being at least primered. Some of them still need parts, and I'm working on those now that Carl is stocking the Estes-dimensioned rings (and other items).

Using the spray-can Kilz has become my finishing system of choice, now. No more FNF tubs, and no more glopping it on and hoping the fins don't warp. I only have to wait about a week before sanding it down, to let it fully cure and leech out all the solvents. It seems to sand better...
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  #516  
Old 07-03-2006, 08:21 PM
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Solomoriah Solomoriah is offline
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Quote:
Originally Posted by CPMcGraw
One thing I was trying to avoid was to make it look like the Estes Sprite.

Quote:
Originally Posted by John Brohm
Craig - that was my thought as well. Bringing in the 3rd fin would provide better support for the ring (a smaller propensity for flutter, not that there would necessarily be that much), but then the design conjures up the Sprite. It's what caused me to suggest bringing in those other noses that I mentioned.

What about using small "spar" fins (really no more than balsa "boards") alternating with the "shaped" fins? That's the first thing I thought of when I saw the picture. Or maybe four spars plus the two fins, laid out in a six-fin pattern... that'd look kind of cool...

... add a couple of dowels and a pod or two... no, wait, wandering off into exoticland again...
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  #517  
Old 07-03-2006, 08:54 PM
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CPMcGraw CPMcGraw is offline
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Quote:
Originally Posted by Solomoriah
What about using small "spar" fins (really no more than balsa "boards") alternating with the "shaped" fins? That's the first thing I thought of when I saw the picture. Or maybe four spars plus the two fins, laid out in a six-fin pattern... that'd look kind of cool...

... add a couple of dowels and a pod or two... no, wait, wandering off into exoticland again...


I had to think about which model you were describing...

Sky Marshall...

When you say "spar fins" I presume you're talking about simple posts of, say, 1/8" square basswood at regular intervals around the inside of the ring fin, right?

I'll try adding some to the RockSim file and see what it looks like...
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  #518  
Old 07-03-2006, 09:05 PM
James Pierson James Pierson is offline
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Craig, very nice design. I think you have found an easier way build a difficult rocket design. I have a Launch Pad kit called the Krypton that has simular ramjets to the Coyote. Its has Bt's for ramjets that are shroueded with paper. It's rated a skill level 5 and that's above my skill level.

I have been saving a few photo's that I thought were cool but have found no scale data for them as of yet.

Enjoy, JP

James Pierson
NAR# 77907
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  #519  
Old 07-03-2006, 11:18 PM
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Solomoriah Solomoriah is offline
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Quote:
Originally Posted by CPMcGraw
I had to think about which model you were describing...

Sorry, joined the party late...

Quote:
Originally Posted by CPMcGraw
When you say "spar fins" I presume you're talking about simple posts of, say, 1/8" square basswood at regular intervals around the inside of the ring fin, right?

I'll try adding some to the RockSim file and see what it looks like...

Not what I was thinking of, but that'd work pretty well. I was thinking more in terms of vanes rather than spars... sorry for the imprecise language.

Either way would be sturdier, and still look cool.
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  #520  
Old 07-05-2006, 12:03 AM
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CPMcGraw CPMcGraw is offline
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Exclamation New Plan -- CSL Lightfoot

The third in the spectacular Civil Space Liner series...

Named after Gordon Lightfoot...

I surprised myself as to how this Bident derivative turned out. The D12-3 is the right motor for this bird, and the performance is not out of any ballpark.

Length: 41.8"
Diameter: 1.5" (BC-1043)
Fin Span: 7.04"
Weight: 3.71 oz

D12-3......560'......22 FPS Dv

Use a 48" rod, 3/16" diameter, to launch this bird. It only requires 35" to reach flight V, but the bird is longer than a standard rod...

Enjoy!
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