Estes X-Ray build

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SCIGS30

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Here is some pictures of an old Estes X-Ray kit that I built. Straight foward build and painted to match the 1979 picture. The fins are 1/16 th sheet balsa and that is what I used, if anyone would like to clone this kit I would suggest using basswood.



 

shreadvector

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Yes, use basswood or even plywood for the fins. I build an original back in the 1970's and those fins were sure weak because they were 1/16" thick balsa. 1/16" thick basswood or plywood would be way stronger. Be careful about any aft c.g. shift from heavier fins. Perhaps 1/32" thick plywood? That is extremely strong and lightweight.
 

Fred

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Fine looking rocket. Good job :)
Cheers
fred
 

John Lawrence

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Dateline: Yuma, Arizona. Summertime, 1967. The MCAS Yuma rocket club conducts its first launch on the baseball field behind family housing. My first rocket? Why, the X-Ray of course. Colonel Jolly was our adult advisor. Wow.

Super nice job on the finish, SCIGS. Question: How did you get the black strip beneath the clear ends of the payload tube? I want to do the same thing on my Constellation clone.

Behave yourself

John
 

shreadvector

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Dateline: Yuma, Arizona. Summertime, 1967. The MCAS Yuma rocket club conducts its first launch on the baseball field behind family housing. My first rocket? Why, the X-Ray of course. Colonel Jolly was our adult advisor. Wow.

Super nice job on the finish, SCIGS. Question: How did you get the black strip beneath the clear ends of the payload tube? I want to do the same thing on my Constellation clone.

Behave yourself

John
I know of two methods:
1) paint the shoulder of the cone and coupler black.
2) Apply black striping tape.
 

SCIGS30

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The LHS normally sells detail tape, but this time they were out and I didn't want to wait. I made my black stripes with decal paper. If anyone needs them let me know and I can PDF them.
 

John Lawrence

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Dear Messrs. 30 and vector: Thanks for the ideas. Maybe I'll try two different methods, and see which works best.

The PDF file would be appreciated.

John
 
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Yes, use basswood or even plywood for the fins. I build an original back in the 1970's and those fins were sure weak because they were 1/16" thick balsa. 1/16" thick basswood or plywood would be way stronger. Be careful about any aft c.g. shift from heavier fins. Perhaps 1/32" thick plywood? That is extremely strong and lightweight.
Actually the extra mass of fins would help establish a reasonable stability margin. As it was originally, the X-Ray was way OVER stable.
 
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Resurrecting a (14 year old) SCIGS thread is always welcome ! :)
One of my winter projects is to build a whole series of down- and up-scales (0.75x thru 4x) of my favorite boyhood rocket: the X-Ray. Don't really see any of them around anymore. Those HUGE 4 fins sure move do the CP aftward.
 

samb

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One of my winter projects is to build a whole series of down- and up-scales (0.75x thru 4x) of my favorite boyhood rocket: the X-Ray. Don't really see any of them around anymore. Those HUGE 4 fins sure move do the CP aftward.
Sounds like a great project. Has sourcing the payload tube in various sizes been a challenge ?
 
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K'Tesh

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For a "near enough" BT-60 clear body tube, Lithonia Fluorescent Tube Guards are a great product. The ones for T12 bulbs are ever-so-slightly larger than BT-60 (it can almost slip a BT-60 inside), so with some shims, it can be used with standard BT-60 parts. They come in 4' and 8' lengths, and can thus be cut to nearly any length you'd want for an upscale of a BT-50 or BT-55 based kit.
 

tsmith1315

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Thanks @TomBroad for bringing this thread up.

That's a great looking X-Ray by SCIGS, and one of those rockets I used to stare at in the catalog. With my small childhood budget, it never made it. After looking at it a few times, I was inspired to dig through the old catalog for possible clones or upscales before planning 2022's build pile.
 
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