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  #11  
Old 02-18-2022, 08:24 AM
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A Fish Named Wallyum A Fish Named Wallyum is offline
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Scott, could you put Earl's info into it's own thread in the plans section?
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Build floor: Centuri Bulldog AGM-83A Centuri Design Contest F-150 Hurricane

In paint: Estes Air Commander, F-22 Air Superiority Fighter. Long Tom, Solar Flare Semroc Cyber III, Excalibur, Firefly

Ready to fly: Estes Warp II
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  #12  
Old 02-18-2022, 09:22 AM
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Muckboot-Palooza ?!?!
I LIKE that description, but would avoid flying anywhere near it !
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  #13  
Old 02-18-2022, 09:49 AM
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Quote:
Originally Posted by ghrocketman
Muckboot-Palooza ?!?!
I LIKE that description, but would avoid flying anywhere near it !

It's not scheduled until Sunday, so the field might surface before then. Still, there were a bunch of geese on the field when I went past on the way home from work yesterday, and they had Taco Bell bags.......
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http://wallyum.blogspot.com/

I miss being SAM 0058

Build floor: Centuri Bulldog AGM-83A Centuri Design Contest F-150 Hurricane

In paint: Estes Air Commander, F-22 Air Superiority Fighter. Long Tom, Solar Flare Semroc Cyber III, Excalibur, Firefly

Ready to fly: Estes Warp II
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  #14  
Old 02-18-2022, 10:36 AM
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Quote:
Originally Posted by A Fish Named Wallyum
Scott, could you put Earl's info into it's own thread in the plans section?

Since this thread is already in the plans section how about if I just change the title?
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  #15  
Old 02-18-2022, 10:42 AM
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Quote:
Originally Posted by Tau Zero
Earl,

I'm guessing the balsa is 1/16" thick? (or "Wizard-thin," as Bill E and I might say.)

"Jes? Noh?"


Doh! (in best Homer Simpson voice). Jes, I left that dimension off, didn't I.

Well, 'noh' ( ), it is actually 3/32" stuff. I too thought it probably was the 1/16 stock before I got the kit bag back out and pulled the fin sheet to double check. Been about a year and half since I scanned this kit.

Earl
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  #16  
Old 02-18-2022, 10:46 AM
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Quote:
Originally Posted by A Fish Named Wallyum
I don't remember ever seeing a PNC 20N that looked like this one. All of mine have been the two piece Estes cones. This one appears to be one piece.


Yes, it is a one-piece blow-molded cone. I'm not as super-familiar with the ins and outs of Estes cones as I am Centuri, so I can't really add any additional info. But, as can be seen on the first page of the instructions, it is called out as a PNC-20N. And the tube is Estes BT-20 stock...it is NOT the Centuri ST-7 material.

Glad I could help 'co-ordinate' your weekend.

Earl
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Last edited by Earl : 02-18-2022 at 07:12 PM.
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  #17  
Old 02-18-2022, 10:48 AM
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Quote:
Originally Posted by Ltvscout
Since this thread is already in the plans section how about if I just change the title?

Okay by me.
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http://wallyum.blogspot.com/

I miss being SAM 0058

Build floor: Centuri Bulldog AGM-83A Centuri Design Contest F-150 Hurricane

In paint: Estes Air Commander, F-22 Air Superiority Fighter. Long Tom, Solar Flare Semroc Cyber III, Excalibur, Firefly

Ready to fly: Estes Warp II
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  #18  
Old 02-18-2022, 11:08 AM
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The only rocket I recall from Estes or Centuri that used 1/16 Balsa for fin stock was the Astron Sprint, which was a "Minimum Drag" BT-50 max-Altitude 18mm design.
There may have been others, but the only one I recall using 1/16 fins was the Astron Sprint.
1/16" fins get beat-up really easily.
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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL
, if you have to ask what is "NORMAL" , you probably aren't !

Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
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  #19  
Old 02-18-2022, 12:19 PM
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Quote:
Originally Posted by Earl
Yes, it is a one-piece blow-molded cone. [SNIP] But, as can be seen on the first page of the instructions, it is called out as a PNC-20N.
Bill and Earl,

The overall shape looks suspiciously like the PNC-20 nose cone in the Wizard, so MAYBE no one will notice. (Hmm...)

And Earl, thanks for the balsa thickness. I'm whipping up a RockSim file, as well.

https://forums.rocketshoppe.com/sho...608&postcount=1

Cheers and blessings,
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--Bill Eichelberger, 02/22/2022


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Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014

Last edited by Tau Zero : 02-18-2022 at 06:22 PM.
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  #20  
Old 02-18-2022, 02:16 PM
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Quote:
Originally Posted by ghrocketman
The only rocket I recall from Estes or Centuri that used 1/16 Balsa for fin stock was the Astron Sprint, which was a "Minimum Drag" BT-50 max-Altitude 18mm design.
There may have been others, but the only one I recall using 1/16 fins was the Astron Sprint.
1/16" fins get beat-up really easily.

Of the K-series kits I've built (and/or cloned), I know that the Apogee II, Astron Farside and Farside-X, Gyroc, the original K-31 Starblaser and the Midget all have 1/16th balsa (cut from BFS-20 sheet) fins. I'm sure there are others.
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