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  #1  
Old 05-17-2023, 01:50 PM
ManofSteele ManofSteele is offline
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Default New North Coast Rocketry Argo D4 Javelin Sport Scale Kit!

North Coast Rocketry is proud to release the Argo D4 Javelin Sport ScaleTM, a 1:17 sport scale model of the famous sounding rocket on May 24, 2023!

Over five years of work went into the development of the kit, which makes use of commercial grade sterolithographic 3D printed parts. The Honest John/Nike and Nike/X248 interstages are 3D printed, allowing for quick and easy assembly without sacrificing detail. The Nike fin units are injection molded for easy of assembly. Combined with lasercut plywood fins for the Honest John first stage, this model is perfect for those who want a classic scale model of the Argo D4 Javelin.

To help ensure soft landings, the kit includes a colorful NCR 36” ripstop nylon parachutes. An NCR Quick Link is also included that makes untangling the shock cord after each flight much easier!

Besides the 3D printed parts, the kit features laser cut plywood centering rings, rail guides, wet-type decals, heavy duty body tubes, and the heavy duty GorillaTM shock cord system.
The model is intended to be launched from a 1010 rail under 24mm engine power.
The design is capable of flying to altitudes over 700 feet on an Aerotech F39-4T motor. The kit is designed for single stage flight, but advanced modelers will be able to convert it to two or three stage flight without much problem.

The Sport Scale kit is 1.98" in diameter, 48.5" long, and weighs 13 ounces. Recommended motors are the Estes D12-3; Quest D22-4 and E26-4; and Aerotech E20-4W, E28-4T, E30-4T, F24-4W, and F39-4T.

The real Argo D-4 Javelin had four stages and could lift a payload of around 125 pounds (57 kg) to an apogee of 1100 kilometers. There were a total of 82 launched between 1959 and 1976. The vehicle consisted of an Honest John first stage plus two Nike upper stages plus a X-248 fourth stage. It was developed by the Air Force to replace its Jason rocket with the mission of measuring radiation in space after high-altitude nuclear explosions. It was subsequently used by NASA for a variety of high-altitude near-space scientific experiments.

3D parts designed by Mike Nowak. 3D parts printed by Galactic Manufacturing.
List Price: $179.99.

Available from www.northcoastrocketry.com, Apogee Components or eRockets!
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  #2  
Old 05-18-2023, 09:43 AM
NOLA_BAR NOLA_BAR is offline
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Nice to see another mid-power scale kit, even if sport scale. An interesting model would be the Astrobee 1500. I have the small Saturn Press version. A 2.6in with 3D printed parts??

Hopefully will see the SLS available soon!

Cheers
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  #3  
Old 05-18-2023, 02:54 PM
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Chris_Timm Chris_Timm is offline
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Shouldn't the scale be 1:11.56 and not the 1:17?

At 1:17 the HoJo would be a BT-55 diameter and not the 1.98" diameter noted.
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  #4  
Old 05-19-2023, 05:06 PM
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astronwolf astronwolf is offline
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Quote:
Originally Posted by Chris_Timm
At 1:17 the HoJo would be a BT-55 diameter and not the 1.98" diameter noted.

Honest John motor diameter ~22.9-inches divided by 17 equals "ballpark of BT-56." Does that seem right?
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Old 05-19-2023, 06:41 PM
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Chris_Timm Chris_Timm is offline
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Quote:
Originally Posted by astronwolf
Honest John motor diameter ~22.9-inches divided by 17 equals "ballpark of BT-56." Does that seem right?


Correct for a smaller size model (~34" tall) that has a BT-55 HoJo which makes the Nike's tiny at BT-50 diameter.

I think it was a cut & paste typo as the Aerotech 1.88" (or Quest 50mm) tubing for a HoJo gives the right overall length which would make the Nike's diameters somewhere closer to the BT-55/56 (35mm) size and the four foot overall length.

A nice size model for mid power.
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  #6  
Old 05-24-2023, 04:39 PM
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Quote:
Originally Posted by Chris_Timm
A nice size model for mid power.

Agreed, though I would hold back on the power. It is an expensive model that I wouldn't want to loose.
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  #7  
Old 05-30-2023, 08:47 AM
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Here's a few pics of the Argo D-4 scale model being prepared for launch at the CanAm Cup in Muncie this past weekend.
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  #8  
Old 05-30-2023, 09:17 AM
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Quote:
Originally Posted by astronwolf
Here's a few pics of the Argo D-4 scale model being prepared for launch at the CanAm Cup in Muncie this past weekend.



Why…that looks like Gus at the controls!
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  #9  
Old 05-30-2023, 09:55 PM
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Quote:
Originally Posted by sandman
Why…that looks like Gus at the controls!

I did, indeed, have the honor. Truly beautiful model!
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  #10  
Old 05-31-2023, 03:52 PM
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Ez2cDave Ez2cDave is offline
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Hmm . . . On closer inspection . . . ( along with Tim's 22.7% mark-up from the $179.99 MSRP , to $220.99 )


The Nike Fin Cans appear to be the Quest injection molded units, not 3D printed.

https://www.apogeerockets.com/bmz_c...age.320x320.jpg



The Nose Cone appears to be the Estes part, not 3D printed.

https://www.apogeerockets.com/bmz_c...age.320x320.jpg



Only these parts are 3D printed, it appears . . .

https://www.apogeerockets.com/bmz_c...age.320x320.jpg



The entire kit . . . Is it worth $180.00 ?

https://www.apogeerockets.com/bmz_c...age.320x320.jpg


Dave F.

Last edited by Ez2cDave : 05-31-2023 at 04:31 PM.
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