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  #11  
Old 03-06-2011, 11:49 AM
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Gus Gus is offline
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Quote:
Originally Posted by tbzep
I can't believe you guys missed the Power System Outfit. It was on the cover of the 1977 (no. 772) catalog and was featured prominantly in catalogs through 1981.

I must have been running errands.
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  #12  
Old 03-06-2011, 02:16 PM
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Quote:
Originally Posted by CPMcGraw
I got very different results, Steve. Not sure if our starting conditions are similar, but here's what I got on the single-engine version:


B4-4......Alt 275' - 291'......Dv 11 FPS - 23 FPS
B6-4......Alt 290' - 300'......Dv 8 FPS - 18 FPS
C6-5......Alt 642' - 688'......Dv 19 FPS - 39 FPS


Best engine for low Dv is the B6-4.

-----

For the two-engine version, I get the following results:


A8-3......Alt 270' - 275'........Dv 3 FPS - 10 FPS
B4-4......Alt 594' - 607'........Dv 7 FPS - 19 FPS
B6-4......Alt 603' - 614'........Dv 7 FPS - 17 FPS
C6-5......Alt 1168' - 1199'......Dv 12 FPS - 29 FPS


Best engines for low Dv are the A8-3 and B6-4.

-----

I ran 10 simulations for each engine. All engines reached safe flight V from a standard 36" x 1/8" rod.


I accidentally left my settings as set to deploy at apogee, instead of deploy at ejection. I'm now right in the ballpark with what you show here .....

Not sure why I changed those settings in the first place but I'm dusting off some old files to hopefully get up to BARCLONE so I'll know what to look for if all my sims appear to be flown in a perfect world! I figured it had to be an "apogee" setting of some sort since engine delay changes didn't alter the altitude results.

Thanks!

.
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  #13  
Old 03-06-2011, 02:19 PM
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Quote:
Originally Posted by Chas Russell
That is so neat, Steve. I received and built Centuri Power System when it first came out and wrote a review for the NAR magazine at the time, late '70s. I assume the die cut motor rings were for the two motor cluster. Still have bits and pieces of the two models.

Chas


Chas,

If you can remember the date of the NAR magazine issue please let me know. I'd like to see if it's posted online somewhere so I can read the article.

Thanks

.
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  #14  
Old 03-06-2011, 06:32 PM
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CPMcGraw CPMcGraw is offline
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Quote:
Originally Posted by snaquin
...I accidentally left my settings as set to deploy at apogee, instead of deploy at ejection...


That's usually the setting you'd use if the model requires electronics for the deployment charge...
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  #15  
Old 08-03-2011, 07:35 PM
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A Fish Named Wallyum A Fish Named Wallyum is offline
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Quote:
Originally Posted by snaquin
Chas,

If you can remember the date of the NAR magazine issue please let me know. I'd like to see if it's posted online somewhere so I can read the article.

Thanks

.


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On the build floor: Estes R2D2, Centuri Stellar Hercules, Semroc SLS Scorpion, Semroc Squire, RDC V-Max, Estes World Federation Star Probe

Ready to fly: Canaroc Green Hornet, Estes Super Neon XL, Estes Astron Farside X, FSI Eos, FRW Magnum Spartan, Centuri Stellar StarLifter
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  #16  
Old 11-21-2014, 11:25 PM
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Default Does anyone have the X-7?

I have the original manual for the Centuri Power System and pieces of the X-16 that my father built back in the late '70s. I am rebuilding the X-16 now .

I would love to build the companion X-7 two stage rocket, but the manual does not have any dimensions - does anyone have the X-7 or know if the dimensions and fin pattern are posted anywhere - I already looked on YORP.

Thanks,
Eric
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  #17  
Old 11-22-2014, 12:05 PM
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Quote:
Originally Posted by FlightWatcher
I have the original manual for the Centuri Power System and pieces of the X-16 that my father built back in the late '70s. I am rebuilding the X-16 now .

I would love to build the companion X-7 two stage rocket, but the manual does not have any dimensions - does anyone have the X-7 or know if the dimensions and fin pattern are posted anywhere - I already looked on YORP.

Thanks,
Eric

SEMROC is still your friend with the original parts list.
http://www.semroc.com/Store/scripts...rts.asp?ID=1121

SEMROC still has fins and tubes along with most of the small bits. You will need to find a PNC-76 or balsa equivalent nose cone. You will need to make the external vented fish paper coupler.
http://www.semroc.com/Store/scripts...?idproduct=2240
http://www.semroc.com/Store/scripts...sp?idproduct=70 (series 7, 9")
http://www.semroc.com/Store/scripts/cart.asp (series 7, 3")



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  #18  
Old 11-23-2014, 01:24 AM
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Many thanks. I also found the decals at Excelsior, this will be fun.
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  #19  
Old 11-23-2014, 05:34 PM
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Chas Russell Chas Russell is offline
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The article that I was thinking of was in the April 1978 Model Rocketeer. It is not my article, so I was probably thinking of one I wrote for a newsletter. I was in charge of the NARTREK program and probably had gotten the Power System Outfit to review the potential of using it to acheive the various NARTREK levels. I still have the nose cones from the models and the interchangable motor mounts for the ST-16 model.
I apologize for the misrecollection. My memory is going...Dave.

Chas
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  #20  
Old 11-23-2014, 05:42 PM
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Chas Russell Chas Russell is offline
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I did mention the Centuri Power System Outfit briefly in the NARTREK Logs in the May and July 1978 issues of the Model Rocketeer. Not as extensive coverage as the product review in the April issue.

Chas
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