How does one create a 2 engine cluster model using Rocksim? I don't see any options in the centering rings. Do you use a Pod to do this? Also is it possible to can't the engine tube a couple degrees. If not I'd still like to model a cluster model. I plan on test flying the model tomorrow but I would still like to modify it so I can use two of the correct engines.




John Boren

Years ago I built a TLP Exocet MM-40, which flys on 2 24mm motors. I thought that I created a rocksim file, but perhaps not. I did find this on rocketreviews. While the graphic doesn't appear to list a two-motor cluster, the BOM does.

When you have your body tube, add an "inner tube" and select motor mount [1]. Then in the design tree, select "Cluster"[2], then next. I picked the two engine option, then you can rotate the tubes horizontal (default) or other orientation. I don't see an option to cant the motors (a la Titan?) but you can change the radial position of each motor tube to space them farther apart.

Attached Thumbnails

             

__________________
David Stribling
NAR 18402 SR
But it is rocket science!
Get yer Barrowmans here

OH...I fully understand your question now...how to create the centering ring for said cluster DOH! Hmm...I'm not sure. I used CAD to make my GTII centering rings, letting the tubes at 3.5 degrees cut the ring for me.

EDIT: Well now, I selected the body tube, inserted a Centering Ring. The default put it at the front of the tube. When I drug the location back, the "Drilled Holes" window magically popped up! Here is the template RS created..

Attached Thumbnails

   

__________________
David Stribling
NAR 18402 SR
But it is rocket science!
Get yer Barrowmans here

So what your saying is I am Freaking Blind. I've been using that software for six years now and I've [U]NEVER[/U] seen that Cluster button.

Thank you very much.


John Boren

It took me a while to figure it out...I've only done 2 clusters with it, several years ago, and I didn't remember the CR trick until tonight

__________________
David Stribling
NAR 18402 SR
But it is rocket science!
Get yer Barrowmans here

John,

As is the case with any other piece of software, the hard part is knowing where to look. (heavy sigh)

__________________
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