Showing coning in simulations

Will OR, RS or RASAero predict coning?

I read another thread posted back in 2003 on the topic and I am hoping that in the last 12 years someone has come up with a way to sim for it? Using RS I have noticed some simulations visually appear, to my eye, that the rocket is coning as the aft swings back and forth. However there is no mention of it, nor do I see any way to quantify it.

Coning???

[video]https://video.search.yahoo.com/video/play;_ylt=A0LEViwYKUJVs2wAGCYnnIlQ;_ylu=X3oDMTB1Zj E1Y3ExBHNlYwNzYwRjb2xvA2JmMQR2dGlkA1BSRENUTDFfMQ--?p=coning+youtube&tnr=21&vid=9FADA5E65A736C1964899FADA5E65A736C196489&l=135&turl=http%3A%2F%2Fts1.mm.bing.net%2Fth%3Fid%3DWN.O WGeUtigNhmG8QVj25gHjQ%26pid%3D15.1&sigi=11vgpkalq&rurl=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DW ygNjMSllLQ&sigr=11bil2pa6&tt=b&tit=CONE-ING+IS+THE+NEW+PLANKING!!!!!+%28AlkiStevens%29&sigt=11fu56dqb&back=https%3A%2F%2Fsearch.yahoo.com%2Fyhs%2Fsearch %3Fp%3Dconing%2Byoutube%26ei%3DUTF-8%26hsimp%3Dyhs-001%26hspart%3Dmozilla%26fr%3Dyhs-mozilla-001&sigb=13dnsujcv&hspart=mozilla&hsimp=yhs-001[/video]

OpenRocket has predicted coning in a rocket that coned in real life but it was hard to notice in the plots; it only showed a lower than expected altitude.

OR, being a full 6DOF simulator, is theoretically capable of modeling coning. But it doesn't seem to handle asymmetries (mass, thrust, drag) very well, so one of the main root causes is missing.

The short answer is no. There are no equations in any hobby simulators that will simulate or predict roll-pitch coupling aka coning. Furthermore in order to a 6-DOF simulator to predict roll-pitch coupling the user would have to measure the 3-D CG and CP of the rocket and measure the aerodynamic 3-D asymmetry of the rocket and the thrust misalignment vector. Having said that, it would be possible to add the equations to a 6-DOF simulator to predict roll-pitch coupling effects under specific range of assumptions such as rocket spin rate and off-center thrust asymmetry.

Coning should not be an issue in a guided rocket as the guidance system should counter any coning before it becomes an issue. In an unguided rocket, one spins the rocket above a certain spin rate, and by design make sure the 3-D Cg is located within a certain distance of the roll axis centerline, and make sure the thrust axis is aligned to within a certain specification to the roll axis. A module could be added to OR to run a matrix of conditions to make a series of runs for trajectory predictions of off-axis thrust/asymmetry effects versus rocket spin rate. To use the results of this prediction, the user would have to be willing to use spin fins on their rocket to make it spin faster than a minimum rate to homogenize the asymmetric effects.

Or just add active guidance to the rocket.

Bob