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  #261  
Old 11-18-2008, 10:00 PM
Tau Zero's Avatar
Tau Zero Tau Zero is offline
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Join Date: Mar 2005
Location: Twin Falls, Idaho, USA
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Thumbs up Semroc CR-78 centering rings

Quote:
Originally Posted by James Pierson
Jay, I need some info on your 5820 design series. I have always avoided using the ST-8 tube cause I could not figure out how to get the ST-7 motor mount tube to center in it. I see the 5820 design series is using centering rings. Please educate me to these centering rings and I will add one more wonderful part to my database.
Jim,

I'm not sure how you missed them, unless you didn't know exactly where to look.

Here they are, CR-78 centering rings direct from Semroc, just like we had "back in the day" from Centuri:

http://www.semroc.com/Store/scripts...p?idproduct=119


Quote:
Originally Posted by CPMcGraw
I can help out here, James. I've done this in "the wild" a few times. It's not a true centering ring, but a couple or so wrap thicknesses of label stock. The fit is either very tight, or a little loose depending on the thickness of the paper and how many layers of wrap you use. YMMV on the number of layers, in other words.

It still shows up in RockSim as a centering ring, however...
(Thurston Howell III voice from "Gilligan's Island") "Well, Craig, you could do that way if you'd prefer. But then I suppose it would be no trouble for you to throw together a functional spaceship using only coconuts and bamboo, hmm?"


Cheers,
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Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131

"Your lightyears may vary."


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014
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  #262  
Old 11-18-2008, 10:27 PM
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CPMcGraw CPMcGraw is offline
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Default

Quote:
Originally Posted by CenturiGuy
Jim,

I'm not sure how you missed them, unless you didn't know exactly where to look.

Here they are, CR-78 centering rings direct from Semroc, just like we had "back in the day" from Centuri:

http://www.semroc.com/Store/scripts...p?idproduct=119


(Thurston Howell III voice from "Gilligan's Island") "Well, Craig, you could do that way if you'd prefer. But then I suppose it would be no trouble for you to throw together a functional spaceship using only coconuts and bamboo, hmm?"


Cheers,


I've used Semroc's version many times, too. They have a complete motor mount kit . But the 'rings' are very thin, and when you don't have any on hand, they are relatively simple to 'fudge' with label stock. I've also used strips of cardstock with yellow glue, but the label stock is so much easier (not to mention being less messy).

Either way you go, there's not much of a gap between the OD of an ST-7 and the ID of the ST-8...
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  #263  
Old 11-18-2008, 11:25 PM
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Tau Zero Tau Zero is offline
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Red face New Design: 5820 Ugly

Quote:
Originally Posted by CPMcGraw
I am officially crediting you with 5 designs, as there are sufficient differences between each of the [5820] variants to call them individuals, and as I really want to get the 500 mark passed as quickly as possible.

In fact, you have now been given the (dubious) distinction of creating the 501st entry, which means we now have the first design in the second group of 500. We now only need 499 more entries to reach the new goal of 1000 designs!
Craig,

Okay, I wasn't going to release Version 3, but since you insist, that one we can count as Number 501. (At least 5820 D was #500. *That's* what I was trying to accomplish.)


Quote:
Originally Posted by CPMcGraw
Don't forget to add the launch lugs!
(cough, cough) That's what I get for getting in a hurry. Here's 5820 Ugly (or "%*@) ugly" if you reverse the caps lock) WITH the 3/4" launch lug tucked neatly under the ST-2010 ring fin.

--I'll need to update 5820 A through D after adding the launch lugs. Just FYI.

.
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File Type: rkt 5820_Ugly.rkt (91.6 KB, 122 views)
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Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131

"Your lightyears may vary."


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014
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  #264  
Old 11-19-2008, 09:19 PM
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Tau Zero Tau Zero is offline
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Thumbs up 5820 A through D updated with 3/4" launch lugs

Quote:
Originally Posted by CenturiGuy
...the 3/4" launch lug tucked neatly under the ST-2010 ring fin.

--I'll need to update 5820 A through D after adding the launch lugs.
And here I have done exactly that.

.
Attached Files
File Type: rkt 5820_D_v2.rkt (96.4 KB, 87 views)
File Type: rkt 5820_C_v2.rkt (87.7 KB, 88 views)
File Type: rkt 5820_B_v2.rkt (95.1 KB, 86 views)
File Type: rkt 5820_A_v2.rkt (55.4 KB, 98 views)
__________________
Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131

"Your lightyears may vary."


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014
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  #265  
Old 11-20-2008, 08:05 PM
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CPMcGraw CPMcGraw is offline
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Exclamation Fresh off the sketchpad...

I am still without the benefit of a working RockSim right now, but I want to share some raw sketches of ideas that I plan to work up as soon as RS9 is available. These won't be officially added to the list until they have a RKT plan to work from.

More to come...
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  #266  
Old 11-20-2008, 08:48 PM
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CPMcGraw CPMcGraw is offline
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Exclamation More from the sketchpad...

A few more raw sketches to be shared...
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Craig McGraw

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  #267  
Old 11-20-2008, 09:42 PM
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CPMcGraw CPMcGraw is offline
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Exclamation More from the sketchpad...

Another batch of ten ideas. Three of these need names, which I seem to be having more trouble coming up with lately. One of these three has a pre-used name...
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  #268  
Old 11-20-2008, 09:52 PM
James Pierson James Pierson is offline
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Thumbs up Cool!

Cool designs Craig!! Wow! I will be chomping at the bit to see those designs in 3D. With designs like that I should be able to get some good spin off variations and we will have even more designs to add to the pile.

James Pierson
NAR# 77907
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  #269  
Old 11-20-2008, 10:08 PM
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CPMcGraw CPMcGraw is offline
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Default

Quote:
Originally Posted by James Pierson
Cool designs Craig!! Wow! I will be chomping at the bit to see those designs in 3D. With designs like that I should be able to get some good spin off variations and we will have even more designs to add to the pile.

James Pierson
NAR# 77907


And to think, once I have these in RKT format, that will give us 531...

Only 69 more to reach 600...

and 469 to reach 1000...
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  #270  
Old 11-22-2008, 11:01 PM
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Tau Zero Tau Zero is offline
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Thumbs up New design: Sonar 7

From the "Comments" section of the attached RockSim 8 file:

+++

This is the logical and (un) natural mutation from my original "5820" design (version A, 11 Mar 2005, which proved unstable), and is hereby dedicated to Bill "Wallyum" Eichelberger, who wanted to see the 5820 take flight.

Named after my audio recording software (Cakewalk SONAR 7) because it has 7 tube fins. The logo font is "TR-909," after a Roland drum machine.

This design was too heavy for single 18mm motors, so I bumped it up to 24mm.

+++

.
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Attached Files
File Type: rkt Sonar_7.rkt (79.2 KB, 111 views)
__________________
Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131

"Your lightyears may vary."


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014
Reply With Quote
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