Comprehensive CTI Rocksim Engine File Request

[Pantherjon]

I recently struggled through a computer failure and in recovery I lost ALL of my saved data on my hard drive..Specifically, what I am looking for is an 'all in one' file containing all of CTI's current certified motor offerings..I know I CAN go to Thrust Curve and get the data. But, that would involve downloading each individual engine file and adding it to RockSim..The Cesaroni.rse file that is currently in my rocksim/data directory is dated 2009!

Anyone have this wild animal? I know that it had been posted on Rocketry Planet, and well, that site is in 'hibernation' right now...

 

[troj]

Mark Koelsch has one; we're working on giving that stuff a "permanent home".

In the meantime, I'll let him know you're in need.

-Kevin

 

[Pantherjon]

Thanks, Kevin!

 

[jpummil]

PJ,

While I'd probably prefer the one Mark is putting together...ThrustCurve has an automated way of grabbing everything in one single .zip file...

On the ThrustCurve page, select "Outbox", then do something like select Motor Manufacturer=Cesaroni and select Data Format=Rocksim...then hit "Search"

At the bottom of the search list will be a button called "Add all to list". Select that.

Then, last but not least, the bottom of the final page has "Download All"...

 

[Pantherjon]

I could try that..I was just trying to avoid having a ton of files to sort through in that directory..Will see how it goes...

 

[jpummil]

I could try that..I was just trying to avoid having a ton of files to sort through in that directory..Will see how it goes...

Same here! Just stumbled upon this method

 

[markkoelsch]

Hello, are you looking for the rse file or the eng version? I would paste them here, but the forum has limits on the size of attachments.

 

[jpummil]

Hello, are you looking for the rse file or the eng version? I would paste them here, but the forum has limits on the size of attachments.

Hey Mark!

Not the OP, but as Open Rocket uses both...is there any real difference? Reason to prefer one format over the other?

Pantherjon uses Rocksim I believe...

 

[markkoelsch]

There are a few things I like about the RSE over ENG. First, it is less prone to syntax errors when typing in the motor info, and is also easier to edit. I also like the fact that you could figure the Cg vs time and have that figure in to the rocket stability. They both work though.

That being said, if you need the complete motor file for any manufacturer I have them.

Mark Koelsch
Thrustcurve.org Editor
Coming soon new file respository for many things
Former Rocketry Planet Moderator and Resident Simulation Guy

 

[jpummil]

There are a few things I like about the RSE over ENG. First, it is less prone to syntax errors when typing in the motor info, and is also easier to edit. I also like the fact that you could figure the Cg vs time and have that figure in to the rocket stability. They both work though.

That being said, if you need the complete motor file for any manufacturer I have them.

Mark Koelsch
Thrustcurve.org Editor
Coming soon new file respository for many things
Former Rocketry Planet Moderator and Resident Simulation Guy

Thank you, Mark! That is very useful information :wink:

 

[Pantherjon]

Pantherjon uses Rocksim I believe...

I dp ..The Cesaroni engine file in the data directory right now is a .RSE file, so I think that is the version I want...

 

[sschnege]

Specifically, what I am looking for is an 'all in one' file containing all of CTI's current certified motor offerings...

I've put together 'sanitized' (everything properly named like the others) .rse files for all the 29mm, 38mm and 54mm CTI motors so far, but haven't really put them into one big lump. In fact, many of them are broken down into grain-based .rse files (one file for all the 1-grain, one file for all the 2-grain, etc....), from which I made the "all_XXmm" files.

PM me if you're interested. Keep in mind that I just discovered CTI has a "pink" motor (whaaaa...?) and I'm about to jump to Thrust Curve to see if it's there, so it can't be considered "complete" at this very moment, but it's closer than where you probably are now.

[Edit]
Actually, I now remember that Mark was regularly posting the "All CTI Motors" file on Rocketry Planet. I grabbed the last on on 8/28/12. PM me and I can send it to you (.eng or .rse), or you're welcome to my other curated filed [there's at least one error in the "all" file related to a few motors with the same avg thrust/name].

 

[iter]

I want a copy as well. I'm working on a graphical catalog of CTI thrust curves a la AT paper catalog, where all motors that fit in a particular casing are on the same graph to the same scale. I find the graphical form much easier to navigate.

(The colors are arbitrary in this one--I'm working on consistently extracting propellent type from motor files).

Ari.

 

[bandman444]

YES YES YES YES yes!!!!


Iv dreamed on CTI thrustcurve pictures like that by case size. Like Aerotechs catalog.

Looks great.

 

[CarVac]

You're missing Vmax.

Unless you don't want it to be like the poor AT 38/360 and 480 cases where you have the terrifyingly tall spikes from Warp-9 coreburners and the loooooooooong tails of the Warp-9 endburners. Or because everyone already knows what Vmax's thrust curves look like?

Very nice, though.

 

[jpummil]

YES YES YES YES yes!!!!


Iv dreamed on CTI thrustcurve pictures like that by case size. Like Aerotechs catalog.

Looks great.

Nothing to add here...Bryce said it all :wink:

 

[iter]

It's possible I missed the Vmax downloading the different files from ThrustCurve, or it's missing there or is under some name I can't figure out. I want one authoritative file with all motors in it!

Also, let know if anyone wants to host the graphics when I'm complete. I can put them on my own website, but I prefer to have them in a place where people are more likely to find them.

Ari.

 

[jpummil]

It's possible I missed the Vmax downloading the different files from ThrustCurve, or it's missing there or is under some name I can't figure out. I want one authoritative file with all motors in it!

Also, let know if anyone wants to host the graphics when I'm complete. I can put them on my own website, but I prefer to have them in a place where people are more likely to find them.

Ari.

That'd be the J1055 VMax in the 2 grain 54mm case...

Maybe add the propellant type next to the motor classification text?

Just a thought...GREAT what you're doing though!!!

 

[Jeroen_at_CTI]

Iv dreamed on CTI thrustcurve pictures like that by case size.

Like this (not complete)?
View attachment Pro29_Thrustcurves.pdf
Jeroen

 

[CarVac]

Like this (not complete)?
View attachment 108078
Jeroen

Exactly like that.

 

[iter]

Exactly like that.

Not exactly like that. I want to make curve colors match propellent types. Also display motor data in tabular format next to the curves: total impulse, max thrust, thrust duration, start mass, burnout mass, propellant type, etc.. And make them complete--Jeroen's chart is missing both my favorite 29mm motors, G54 and H54.

So Jeroen, am I wasting my energy replicating work that you're already doing (or have done)?

Ari.

 

[bandman444]

Like this (not complete)?
<img src="https://www.rocketryforum.com/attachment.php?attachmentid=108078"/>
Jeroen

yeah.

I want something I could print out a page at a time, out in a binder and when I need a motor i just pick the case and know exactly what I want.


Would be very excited to see that when complete. Thanks Jeroen.

 

[Rocketjunkie]

And make them complete--Jeroen's chart is missing both my favorite 29mm motors, G54 and H54.

And the H410

 

[iter]

Here's what I'm coming up with. This is an almost complete catalog of CTI 29mm motors. One motor is missing, 5G H160 skidmark. The data files are from Open Rocket's SVN repository, the most complete single source of these files that I have (as in I can download them all with one command, rather than go through a painful hand-selection process). Pro 29 seems to have the most complete coverage in this data set. From what I can see, many reloads are missing from Pro 24 and Pro 38 series, and a couple are in the set but not on pro38.com . I haven't looked at larger diameters yet. I'm still working on associating data tables (weight, total impulse, etc.)

This is very preliminary work. When it is more complete, I'm thinking of making a separate thread for these, and maybe Kevin can make it a sticky is people find it useful. If anyone has an alternative suggestion for hosting these graphs and upcoming tables, please let me know.

I welcome your feedback on the accuracy of my graphs, my color choices, image size, scale or anything else that seems relevant.

Ari.

 

[iter]

Here's another idea: show all graphs to the same scale within a motor diameter. I lose some resolution this way, but I can clearly see, for instance, that all black motors burn for about .8 second and increase in thrust with each additional grain. I can see that only 3G has any longburns (2 of them as it happens). I can see that the 3 VMax motors differ greatly between them in thrust. Etc.

Ari.

 

[iter]

There are a few things I like about the RSE over ENG. First, it is less prone to syntax errors when typing in the motor info, and is also easier to edit. I also like the fact that you could figure the Cg vs time and have that figure in to the rocket stability. They both work though.

I use .eng for now. In the few .rse files I've looked at, the CG appears to be constant across the burn to the third decimal place, suggesting the data are unavailable and the values represent either beginning or ending CG.

The format allows for a lot of neat data, but only some of the files seem to actual provide these.

Ari.

 

[CarVac]

The problem is they look almost all the same. You would be better served, at least in the 29mm size, by two numbers and a word: average thrust, burn duration, and (neutral/progressive/regressive/moonburner).

 

[iter]

The problem is they look almost all the same. You would be better served, at least in the 29mm size, by two numbers and a word: average thrust, burn duration, and (neutral/progressive/regressive/moonburner).

Thank you for your suggestion. I'm not sure if you mean that the designations all look the same, the curves or the colors. I chose the colors to represent burn colors and be sufficiently different from each other. If you have suggestions for colors, I welcome them in either RRGGBB format or as CSS names.

One nice feature in the AT catalog is that they put legends next to each curve rather than in the corner like gnuplot does. Except to position each label manually (that's over 250 individual labels fro CTI!), I don't know how to produce that layout.

I'm working on adding additional information like burn duration in tabular form. Type of burn (progressive/moonburner, etc.) is not readily available in the data files AFAICT. I suppose I can write code to look at the data points, but first I want to make sure I display data that are already present in the files.

Ari.

 

[CarVac]

I just meant the shape of the thrust curves. Because CTI basically universally uses Bates grain geometries, thrust curves all are similar.

 

[cwbullet]

Mark,

I am willing to host the files and make a website for them if you are interested.

Chuck