I do now.
And that's why I always say Read that PDF first...:yes::thumbup:
I do now.
{snipped to eliminate scrolling }
Hi Petr. I have tried to solve the problem of the launch vehicle having insufficient performance to carry the spacecraft all the way to orbit, and I think I have the solution: simply add four more boosters to the Trassa rocket (making it a "Trassa 18G"), and using the original guidance file I got the spacecraft into a -1000 X 650 km X 51.6 deg. orbit. I think if you can modify the guidance file such that it pitches slightly lower than what it does now, it would perform perfectly. Could you please help me to check it? Thanks!
GPS
Wouldn't that be a bit overpowerd for a LEO launch? Besides that, the spacecraft is, according to the pdf, designed to be sub-orbital after separation, that's why it has extra fuel
Hi Petr. I have tried to solve the problem of the launch vehicle having insufficient performance to carry the spacecraft all the way to orbit, and I think I have the solution: simply add four more boosters to the Trassa rocket (making it a "Trassa 18G"), and using the original guidance file I got the spacecraft into a -1000 X 650 km X 51.6 deg. orbit. I think if you can modify the guidance file such that it pitches slightly lower than what it does now, it would perform perfectly. Could you please help me to check it? Thanks!
GPS
Edit: One more question: After calculating the performance of each stage of your rocket, I found that the performance of the booster stages are way too low for a real rocket booster: the specific impulse is just ~169 seconds, which is too worse for a rocket booster (e.g. most SRBs have a S.I. of 250 - 280 seconds, while an engine running kerosene (which I think you are using for the boosters) should have a S.I. of around 300 - 370 seconds. So, I suggest you to either lengthen the total burn time of the boosters (without changing the thrust and propellant mass), or to decrease the mass of the propellant used in the rocket boosters (keeping the thrust and burn time constant), so that the boosters can have a higher, realistic performance, as your rocket's three main stages do. Thank you for your attention, and I applause your detailed work! :thumbup:
-30=PlaySound(Sound\TPACCA_LV\launchG.wav)
-3=engine(0,100,3)
0=roll(15,90,35.87,88.5,1)
15=pitch(88.5,40,45)
60=pitch(40,40,44)
104=pitch(40,20,16)
120=pitch(20,15,83)
129=fairing()
203=pitch(15,10,15)
218=aoa(0)
295=pitch(10,8,20)
315=pitch(8,5,10)
325=aoa(0)
616=jettison()
Thank you!Hi Petr. I have tried to solve the problem of the launch vehicle having insufficient performance to carry the spacecraft all the way to orbit, and I think I have the solution: simply add four more boosters to the Trassa rocket (making it a "Trassa 18G"), and using the original guidance file I got the spacecraft into a -1000 X 650 km X 51.6 deg. orbit. I think if you can modify the guidance file such that it pitches slightly lower than what it does now, it would perform perfectly. Could you please help me to check it? Thanks!
GPS
Edit: One more question: After calculating the performance of each stage of your rocket, I found that the performance of the booster stages are way too low for a real rocket booster: the specific impulse is just ~169 seconds, which is too worse for a rocket booster (e.g. most SRBs have a S.I. of 250 - 280 seconds, while an engine running kerosene (which I think you are using for the boosters) should have a S.I. of around 300 - 370 seconds. So, I suggest you to either lengthen the total burn time of the boosters (without changing the thrust and propellant mass), or to decrease the mass of the propellant used in the rocket boosters (keeping the thrust and burn time constant), so that the boosters can have a higher, realistic performance, as your rocket's three main stages do. Thank you for your attention, and I applause your detailed work! :thumbup:
What is the G loading with the extra boosters? I'm wondering, because that would have great influence on whether the rocket could be man-rated.
I'm 100% certain it's a limitation you can overcome, seeing how you've managed to master SC3 to a few extremes. There's a million amazing things you can make your vessels do with that extra effort of a DLL. At the very least it can cure SC3's terribly limited thruster implementation.
But this is another topic entirely, and doesn't detract from the quality of these addons. :tiphat:
Just did some experiment with the launcher, and I found that if you decrease the propellant mass of the boosters to 27050 kg, I could launch the spacecraft to a -250 X 325 km X 51 degree orbit with the original Trassa 14G configuration. That's good enough for me.
This is the guidance file that I used:
Code:-30=PlaySound(Sound\TPACCA_LV\launchG.wav) -3=engine(0,100,3) 0=roll(15,90,35.87,88.5,1) 15=pitch(88.5,40,45) 60=pitch(40,40,44) 104=pitch(40,20,16) 120=pitch(20,15,83) 129=fairing() 203=pitch(15,10,15) 218=aoa(0) 295=pitch(10,8,20) 315=pitch(8,5,10) 325=aoa(0) 616=jettison()
...So I tried to make the boosters stronger, but it complicates the whole guidance very much. After 10 hours coffee:in one piece) of trying to hit any satisfactory trajectory, I gave it up.
Your solution seems the best in this moment.
I've tested your guidance, made it a little bit more smooth and reached the same numbers as you did. It would be great if you permitted me to use this modification to update both Trassa and Gorizont. Your help would be surely noted in credits:facts::thumbup:
So Gorizont can reach orbit on it's own now?
is there any way i can launch gorizont 1 on a R7 soyuz rocket or proton rocket instead of trassa lv ?
BEGIN_DESC
Launch Gorizont
END_DESC
BEGIN_ENVIRONMENT
System Sol
Date MJD 57005.3804422119
END_ENVIRONMENT
BEGIN_FOCUS
Ship P2
END_FOCUS
BEGIN_CAMERA
TARGET P2
MODE Extern
POS 8.64 81.36 -3.29
TRACKMODE Ground Earth
GROUNDLOCATION 62.98447 46.07055 1.00
FOV 30.00
END_CAMERA
BEGIN_HUD
TYPE Surface
END_HUD
BEGIN_MFD Left
TYPE Surface
SPDMODE 1
END_MFD
BEGIN_MFD Right
TYPE Orbit
PROJ Ship
FRAME Equator
ALT
REF Earth
END_MFD
BEGIN_SHIPS
Gorizont_1:Spacecraft\Spacecraft3
STATUS Landed Earth
PRPLEVEL 0:1.000
END
SAS:Proton_LV/LES
STATUS Landed Earth
PRPLEVEL 0:1.000
END
Fairing1:Proton_LV/fairing
STATUS Landed Earth
PRPLEVEL 0:1.000
MASS 600
MESHNAME Proton_LV\KTYPE2
END
Fairing2:Proton_LV/fairing
STATUS Landed Earth
PRPLEVEL 0:1.000
MASS 600
MESHNAME Proton_LV\KTYPE2
END
P3:Proton_LV/P3
STATUS Landed Earth
PRPLEVEL 0:1.000 1:1.000
GUIDANCE
TRAJECTORY Config\Vessels\Proton_LV\ZVG.txt
TYPE 1
PAYLOAD Gorizont_1
PREF 0 0 1.27
LES SAS
LREF 0 0 -4.5
FAIRING1 Fairing1
FREF1 0 -.996 5.7
FAIRING2 Fairing2
FREF2 0 -.996 5.7
FROT2 -1 0 0
END
Skirt:Proton_LV/Skirt
STATUS Landed Earth
TYPE 0
END
P2:Proton_LV/P2
STATUS Landed Earth
PRPLEVEL 0:1.000 1:1.000
GUIDANCE
TRAJECTORY Config\Vessels\Proton_LV\ZVG.txt
TYPE 1
DATA 0 0
PAYLOAD P3
SKIRT Skirt
FOCUS 1
END
P1:Proton_LV/P1
STATUS Landed Earth
POS 63.0423200 46.0353000
HEADING 0.00
ATTACHED 0:0,LC81
PRPLEVEL 0:1.000
NAVFREQ 0 0
GUIDANCE
TRAJECTORY Config\Vessels\Proton_LV\ZVG.txt
TYPE 1
PAYLOAD P2
INCLINATION 51.60
END
LC81:Proton_LV\LC81
STATUS Landed Earth
POS 62.9869700 46.0708400
HEADING 210.11
PRPLEVEL 0:1.000
NAVFREQ 0 0
END
kmlWriter:Proton_LV/kmlWriter
STATUS Landed Earth
END
END_SHIPS
BEGIN_ExtMFD
END
It is the contents of a scenario file. Just create a new txt file in your scenarios-folder, change the extension to .scn, and copy-paste this text into it. Also, insure you have the Proton LV installed.