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  #31  
Old 08-16-2019, 12:34 AM
djmartins djmartins is offline
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Join Date: May 2019
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Quote:
Originally Posted by blackshire
The Servo-Launcher (that's it's name, see: http://www.ninfinger.org/rockets/no...a/72cen052.html ) would make an excellent 3D printed "Retro-Repro" piece of GSE (Ground Support Equipment).



I'd be able to model it if I had some good dimensions to work from or a launch pad.
The air hose looks a lot like sprinkler hose I have seen at Lowes.
I also would love to see a model of the MPC launch controller out there for people to print.
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  #32  
Old 08-16-2019, 03:27 AM
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blackshire blackshire is offline
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Quote:
Originally Posted by djmartins
I'd be able to model it if I had some good dimensions to work from or a launch pad.
The air hose looks a lot like sprinkler hose I have seen at Lowes.
I also would love to see a model of the MPC launch controller out there for people to print.
First, let me second Faithwalker's thanks to Bernard for documenting the Centuri Power Tower in such detail! While consumer 3D production equipment is now plastic part build-up (and metal part build-up) tooling for the most part, I'm sure that other computer-controlled equipment for other production operations (such as metal stamping and machining & sanding) will become available for consumer use sooner or later, and such part definition files will be very useful when that happens (such tooling probably already exists for commercial use). Now, concerning reproducing the Centuri Servo-Launcher http://www.ninfinger.org/rockets/no...a/72cen052.html :

Unless the sprinkler hose you referred to was quite narrow in diameter (for garden irrigation units, perhaps?), The Servo-Launcher's pneumatic tubing was more like--and may have been--surgical rubber tubing that was black-pigmented to resist UV exposure (RC sailplane Hi-Start catapults often use black surgical rubber tubing as the energy-storing elastic, with a length of monofilament or other non-stretch line that is attached to the glider's tow hook). The Servo-Launcher used two "D" size Photo-Flash batteries, which provide some size comparison with the tubing and the launcher itself (these were high-discharge-rate batteries, but they were the same size as carbon or alkaline "D" batteries). Also:

The rocket that is shown on the Servo-Launcher is the Marauder (see: http://www.ninfinger.org/rockets/ca...d/71dcen40.html ), a two-stage Centuri kit that was in production until 1971. It was made using the 0.908" Outside Diameter (ST-8, see: http://www.ninfinger.org/rockets/no...a/72cen058.html ) body tubing, which--along with the blast deflector and "D" batteries shown in the Servo-Launcher photograph--may help in scaling a duplicate Servo-Launcher (it used the 1/8" x 3' launch rod). Plus, here (see: http://www.spacemodeling.org/jimz/kc-45.htm and http://www.spacemodeling.org/jimz/centuri/kc-45.pdf ) are the Marauder kit instructions.

I hope this information will be helpful.
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