I revealed a few tricks I've learned on the related thread on RockSim newletters:

http://www.oldrocketforum.com/showthread.php?t=1259


Here are some basic files on creating nose cones in RockSim from more than one part. Usually, that entails using a nose cone (*sometimes*) and building the rest of the shape up from one or more transitions.

I picked the Semroc nose cones below (BC-723P, 730P, and 734P) because they approximate the Centuri PNC-73, 76, and 74 cones (at least to *my* eye).

If you use these files, make sure you don't use the "Nose cone base diameter" option to figure stability. Instead, pay attention to the "User defined diameter," which in these cases is specified as the outer diameter (O.D.) of a Semroc ST-7 body tube.


(This is what happens when you're obsessed with detail but have a really short attention span. )

(--Sorry, *what* was I saying? )


Cheers,

Attached Thumbnails

     

Attached Files

	BC-723P_NoseCone_Semroc.rkt (10.3 KB, 102 views)
	BC-730P_NoseCone_Semroc.rkt (10.3 KB, 92 views)
	BC-734P_Semroc_Corrected.rkt (11.4 KB, 2 views)

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


"I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. "

--Bill Eichelberger, 02/22/2022


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

Neat!

__________________
Carl McLawhorn
NAR#4717 L2
semroc.com

From the "OOPS!" Department:

I did some double-checking, and realized the Semroc BC-734P RockSim file that I uploaded above wasn't *completely* correct.


I've attached the updated version, which is 3.4" inches long, instead of 3.0" long. (The picture above is correct, but the file is not.)


Cheers,

Attached Thumbnails

 

Attached Files

BC-734P_Semroc_Corrected.rkt (10.8 KB, 27 views)

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


"I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. "

--Bill Eichelberger, 02/22/2022


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

Is a BC-734P 3.4" long?

This listing says it is:

http://www.semroc.com/Store/Scripts...?idproduct=1459

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


"I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. "

--Bill Eichelberger, 02/22/2022


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