How to add motors to RASAero 1.0.2.0?

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DennisMYeh

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Hi there,

I am trying to add a .eng RASP motor file to RASAero, and can't seem to find out how to do so through google, the manual, or by searching the Program Files or My Documents directories... would anyone happen to know how to to upload a motor to RASAero?

Thanks,
Dennis
 
Hi there,

I am trying to add a .eng RASP motor file to RASAero, and can't seem to find out how to do so through google, the manual, or by searching the Program Files or My Documents directories... would anyone happen to know how to to upload a motor to RASAero?

Thanks,
Dennis

Find the RASAero .eng file, and paste lines in from your file.
 
Thanks for the quick reply :)

(For some reason I thought it was going to be a directory of .eng files)
 
So I tried uploading two motors I got from thrustcurve.org: https://www.thrustcurve.org/motorsearch.jsp?id=374 which is already is RASP format and https://www.thrustcurve.org/motorsearch.jsp?id=515 which I had to convert to RASP format using EngEdit.

However, both of them don't show up on the list :\

I closed and restarted RASAero and can't find any other RASP.eng files anywhere other than in My Documents/RASAero/. Would anyone happen to know what I'm doing wrong? The exact code I pasted in is:

;
;Rattworks L600 Hybrid
;prepared by Andrew MacMillen NAR 77472 2/28/04
;based on TMT thrust data from Paul Holmes & TMT cert doc
;NOX weight calc'd at .7048gm/cc, 75 deg F @ 812 psi
;compiled with RockSim7 EngEdit
;within 3 percent for total impulse
;peak and average thrust are off due to data spike smoothing
;accurate thrust profile
;NOTE: NOT RATT, CAR, TMT OR NAR APPROVED
;Rattworks L600
L600 64 1066 100 1.863 2.25 RATT_Works
0 88.62
0.02 153.82
0.19 158.02
0.35 169.94
0.4 1127.04
0.78 1001.2
2.23 778.11
2.84 736.24
3.07 704
3.62 673.43
3.81 435.29
3.89 350.43
4.14 240.05
4.31 197.19
4.49 165.4
4.66 139.26
4.82 119.21
5.01 99.01
5.34 70.99
5.93 49.74
6.49 38.96
6.98 36.42
7.1 0

;Input by Tim Van Milligan for RockSim users. Used John Coker's ThrustCruve
;Tracer program. Thrust curve and engine data from C.A.R. certification dated
;6-30-06.
L600 75 1016 1000 2.265 5.134 West_Coast_Hybrids
0.072 871.284
0.119 580.856
0.215 674.327
0.263 564.164
0.31 704.371
0.43 831.225
0.477 787.827
0.561 1148.36
0.633 1098.29
0.752 1124.99
0.883 1101.62
0.979 804.519
1.134 761.121
1.241 847.916
1.337 767.798
1.42 754.445
1.468 774.474
1.552 744.43
1.946 711.048
2.626 684.342
3.056 674.327
3.39 614.238
3.473 630.93
3.593 627.591
3.724 610.9
3.796 574.179
3.927 450.664
4.058 380.561
4.393 257.045
4.727 166.913
5.168 63.427
5.443 0
;
 
It might be having a problem with formatting.

First of all, the data starts with an implicit 0,0. Thus, that makes your first thrust curve invalid. (Change it to '0.001 88.62')

The second one... I don't know what's wrong. For one thing, it has the maximum number of points (32), but it ought to handle that okay.
 
I tried editing the file some more and notepad ended up not letting me save it saying it was still open for some reason... After restarting my computer, something odd happens: I get an error saying "Engine File Error: Error Reading the Motor file. Please verify that the file 'Rasp.eng' is in the application directory." And then proceeds to magically load the engine file (although without the two custom motors).

This seems to be an odd problem, maybe caused by a virus or corrupted install of RASAero. I'm going to try reinstalling the program and hopefully will have some luck with that. If I manage to find out what's been going on I'll post what happened to this thread in case future rocketeers find it useful.

Thanks for all of the tips, CarVac! You've been a great help :)
 
I tried editing the file some more and notepad ended up not letting me save it saying it was still open for some reason... After restarting my computer, something odd happens: I get an error saying "Engine File Error: Error Reading the Motor file. Please verify that the file 'Rasp.eng' is in the application directory." And then proceeds to magically load the engine file (although without the two custom motors).

This seems to be an odd problem, maybe caused by a virus or corrupted install of RASAero. I'm going to try reinstalling the program and hopefully will have some luck with that. If I manage to find out what's been going on I'll post what happened to this thread in case future rocketeers find it useful.

Thanks for all of the tips, CarVac! You've been a great help :)

Try not using Notepad. It's pretty terrible at screwing up line endings and such. Use a real programming text editor like Notepad++.
 
Reinstalled RASAero and used Notepad++, and IT WORKS!!! Thank you so much, CarVac :)

I think the error was caused by having a second instance of RASAero open (I'm running Windows 7, and for some reason it doesn't show up in my taskbar half the time).
I did have a blank line without a semicolon between the two motors - I'm not sure how this would have caused both motors to not show up...
I tried deleting the semicolon between the two motors again, and then the last motor didn't show up. It's possible I had another blank line before the other one as well.

Out of curiosity, does RASP format assume a blank line with no semicolon is the end of the file?

Thanks Again,
Dennis
 
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