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  #11  
Old 01-30-2019, 08:00 PM
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Attached is my completed simulation of the Estes K-36 Saturn V kit. For an accurate simulation you will need to remove either the plastic fin set or the balsa fin set depending on which configuration you are using. The engine shrouds are simulated as one conical transition with its diameter set to that of the maximum radial distance from the center at the end of the engine shrouds.
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Name:  Saturn V Sim.jpg
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Name:  Saturn V 3D Sim.jpg
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File Type: rkt oop_estes_Saturn_V_K36.rkt (127.4 KB, 16 views)
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  #12  
Old 01-30-2019, 09:18 PM
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Clear plastic fins on anything just plain SUCK.
Use enough nose weight to fly with SCALE fins.
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  #13  
Old 01-30-2019, 11:23 PM
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Instead of added nose weight you could possibly use induction stabilization: https://www.apogeerockets.com/educa...wsletter379.pdf
Blackshire informed me about this possibility and I am planning on building one of these finless missiles http://usnavymuseum.org/photos/SLBMs.asp to test out this concept.
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  #14  
Old 02-09-2019, 09:39 PM
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Thanks.

Unfortunately OpenRocket can't attach the free form fin set to the transition so the fins aren't included.
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  #15  
Old 02-10-2019, 11:12 PM
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Quote:
Originally Posted by tbzep
Thanks.

Unfortunately OpenRocket can't attach the free form fin set to the transition so the fins aren't included.


I created the attached OpenRocket file for the out of production Estes Saturn V K36 with both the plastic and balsawood fin sets. Remove one or the other fin set as desired.

Can someone with more OpenRocket experience especially with clustering motors please check this simulation?

Thanks,
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File Type: ork oop_estes_Saturn_V_K36.ork (4.6 KB, 12 views)
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  #16  
Old 02-10-2019, 11:37 PM
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Quote:
Originally Posted by teflonrocketry1
I created the attached OpenRocket file for the out of production Estes Saturn V K36 with both the plastic and balsawood fin sets. Remove one or the other fin set as desired.

Can someone with more OpenRocket experience especially with clustering motors please check this simulation?

Thanks,

The .ork file worked. It looks like I could do a lot of different things with the K36 if I use the clear fins. It really kicks the CP on back there.
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  #17  
Old 02-12-2019, 11:42 PM
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Little over 10 years ago I flew my vintage Centuri Saturn - V without the clear slip on fins; added some Play Doh in the nose area (Service Module bodytube) to bring the CG forward more. Flown down at Needville, TX using three C6-3's, the boost was a bit squirrely, but as can be seen in this video, straightened up after burnout and flew just fine.

https://youtu.be/0uTm-rbvQJk
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  #18  
Old 02-13-2019, 04:56 PM
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Maybe 3 D21-4s would work better.
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  #19  
Old 02-15-2019, 07:31 PM
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Quote:
Originally Posted by ghrocketman
Maybe 3 D21-4s would work better.


Which equals more tail weight and thus requires more nose weight to correct the CG/CP relationship... more nose weight means slower acceleration and more impulse required to achieve a given level of performance (speed/altitude). Thus it can become a "vicious circle"... (similar to the Ares V debacle).

Sometimes it's best to just make the fins a little bigger...

Later! OL J R
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