gilflo

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About gilflo

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  1. Hello guys Here is my Mercury Shuttle. 508T full weight with more than 26000DV to join Mercury low Orbit from my ISS station In the hold, there's a Mercury lander able to make the return trip from low orbit and a Mercury rover for a single trip. On the top a survey Satellite to draw a map of Mercury All this happens in RSS The Mercury lander is in the back hold which is open for the pic. Technically it never opens and does not need to. Here is the ISS station, more than 1000T launch 5 parts and assembled in space You can see a Mercury Shuttle prototype connected The StratoMaX is the launcher on top of which the Mercury Shuttle is connected to be launched at 48500m and continue to orbit on its own. Its weight for launch is around 1650T. The Mercury Shuttle weight for launch is around 185 T, only 15% fuel needed to join the ISS Space station to refuel before leaving to Mercury. The StratoMax is filled with 70% fuel and is able to land back on Earth, and if not he is able to land on sea. 20 J61 engines between 2.5 and 3m StratoMax with Mercury Shuttle on top Here is a launch test: speed reached for launch is between 4500m/s and 5500m/s. After 5000m/s the StratoMaX is not always able to fly back to base because of the too great distance As you can see FMRS is wrong, the StratoMaX is not taken in account because the StratoMaX engine as f1st Stage and Mercury Shuttle Engines as 2nd stage as the root piece is the Mercury shuttle
  2. RSS Mission to Mars - Part 3 We landed on Mars with 8761 DV Left. Now, it's time for Earth return. Take off during night to be aligned with Earth Plan. then, once in orbit ejection of all landing parachutes that we could have done before take off.. burning to Earth Periapsis calculation to join orbit at 120 kms. Intercepting Earth Orbit, we should have 230O Dv left which not so much for braking and re-entry Trying a Radial re-entry at 90 kms to close the orbit But it's not enough and we have to burn retrograde another 900-1000DV and perform a lot of Radial aerobraking passes at 80 kms to reach re-entry orbit here Re-entry braking was a little bit bumpy as you will see on the short vid following and the end of the post We got some LF in spare for final approach to base and relight Jet engines and realized that a right winglet was missing...I think it was broken during Mars landing Approaching the runway During the vid, you will seevthat we used Vernor engines to keep radial position during re-entry for better braking, but we not enough Oxydyzer left to use them and that why the re-entry was bumpy. Then the aircraft was very touchy on pitch axis and even with Atmospheric Autopilot to pilot in FWB I had to use SAS to help... In conclusion fo this Mission RSS cost a lot of DV and there's 3 choices to use Spaceplane to visit our system -Vertical launches on boosters like Space shuttle but I think it will limit DV capacity -Stratolaunches associated or not with ejectable boosters but think I reached the weight and DV limit to 16000-17000DV in orbit DV -Stratolaunches or vertical launches associated with orbital refueling stations: it could be the best option because you can send bigger but lighter spaceplanes with cargo hold and spacelab using just enough fuel to reach the station ..... Stratolaunch on refueling stations is my preferred option as you can re-used each aircraft....
  3. For a 1500T spaceplane I use at least 6 x 6wheels main gear aligned on the rear, perfectly aligned in 3 dimensions with Hangar Grid, as they must all support exactly the same weight (1550T/36) and 2 x 2wheels directional gears aligned under the nose. You can take off with no problem but landing at maxi weight must be very smooth...with vertical speed less than 3m/s 1500T/36 is 41T per wheel as in the real life you got 12 Wheels(2 x 6 wheels main gears) on a B777 for 340T max on take of which is 28T/wheel and 250T for landing which is 21T/Wheel So with a 1500T spaceplane 8 to 10 6Wheels main gears should be the minimum rules! And perfectly aligned in 3 dimensions is very difficult to fix.....
  4. Exactly, that's what I do also, but I do agree that adjustable landing gears are prettier and good looking....
  5. Hello OPT guys Here is my Mission to Mars in RSS mod (without FAR), part 1 with Martian shuttle launch from the Straolauncher StratoMaX, and part 2 landing on Mars I must say that OPT mod is perfectly adapted for RSS, the jet engines being efficient enough to build huge stratolaunchers and hybrid engines being adapted for longhaul spaceflight. SSTO is quite challenging as on Kerbal system with stock engines: You reach orbit and back but to fly further you must think different, with Stratolanching or Rocket vertical launching like NASA SpaceShuttle
  6. RSS Mission to Mars - Part 2: Landing on Mars Here is the DV Map to Solar system: We need around 6300 DV to there and to land High atmosphere is around 120 kms over Mars and we perform some aerobraking at 50 kms and it was quite efficient Then we use the engines to establish a 120 kms orbit The Martian Shuttle will brake on and land on retrograde Here is a small HD vid to see how we proceeded: Rover was ejected during landing procedure Then Kerbals went out to drive the Rover. At this point there's a bug on this OPT cockpit that can take 5 crews: we launched 5 crews and we were 2 on arrival....but not a problem I forgot the ladder on the rover but the Kerbal manage to climb and drive the rover under the nose of the shuttle so that his colleague can jump on the rover Driving to the nearest hill to plant a flag And here we are There some science instruments on the rover but unfortunately there's no scientist. Now it's time to board
  7. Hello In the OPT Stail Class QS01 cockpit, if you select the crew icon there's 5 seats available to choose 5 crew members, but when you launch the plane, only 2 seats with 2 crew remain....Is it a bug? I can only see 2 crew among the 5 I choose...I am with the version 1.4.0 du to problem with TweakScale.... I also noticed there's no light in the cockpit and in some others... Is there a config file to modify to get the 5 crew seats available when the plane is on the runway?
  8. RSS Mission to Mars - Part 1 Here we take off to be aligned with Mars plane climb to 48000m Around 48000m the StratomaX engines shut down due to lack of oxygen. We light on the 4 engines of the Shuttle in rocket mod and at launch the 2 RS 25 engines from the jettison able tanks to orbit are lighted. The shuttle climbs to orbit using 6 engines taking fuel from the jettissonable tanks Then the 24 ullage engines (4 groups of 6) that avoid any collision at launch, are ejected circularization on reaching apogee Recovering the StratoMaX at more than 1000 kms from base, we have not enough fuel to fly back A special runway built for StratoMax in the south of Brazil is at 400kms on our right. we need to descent to be able to make the right turn. We just need a bit of sub orbital flight to reach it runway in sight leaving base leg to final appraoch Nearly landed, short of fuel on the runway Jettissoning the orbital fuel tanks. Notice that the FMRS has recovered the StratoMaX as soon as he has landed Here is a short 4 mn HD vid to see the launch
  9. Well playing with FAR is much more complicated, I tried on Kerbin and I liked it, but on RSS wow!!! That's the point: The Martian shuttle is designed to take off from Mars and land back to Earth. With 16000DV from Earth orbit, it must be possible. What I am trying now is to Built a runway with KerbalKonstruct to have the StatoMax land on it after launch....So I must launch in the Mars plane and as near as possible from the South America coast if I want to be able to land the Stratomax on a runway and not in the sea....
  10. Hello guys I introduce the StratoMaX : This RSS Stratolauncher is able to launch 315T or more at a speed of more than 5500m/s (around mach 17) at its ceiling of 48500m. Playing RSS Earth we need 7600m/s to reach orbit This is a 1600T plane with OPT MK2 central cockpit and 20 OPT J61 TurboRamjet "Starwaster" engines (diameter 2m50) , giving a TWR >3 at the 48500m ceiling Here is the monster Screen of the engines Many many wings, winglest and stabilizers as we need to pilot this thing at 48500m with a nearly 0 m/s vertical speed before launching. Here is the Martian Shuttle, with 2 ejectable rockets, that allow the shuttle to reach orbit with nearly its full 16000DV range. The 4 engines Shutlle are working on LF taken in the stratolauncher tanks to help for climb, but they switch off long before reaching the ceiling. At launch, they are relight in Closed Cycle and run with the 2 RS 25 from RealScaleBoosters taking their fuel from the lower ejectable tanks so that the Martian Shuttle range can be maximum at orbit There is a rover with 2 seats in the cargo hold and it is ejected during Martian ground approach and it lands with its own parachutes. Mars approach is performed retrograde, parachutes get out when speed is lowered under 800m/s by engines around 25000m.. Then approach is completed with engines and chutes in retrograde. Near the ground 2 back landing struts are supposed to help the back touch and give an impulse to lower the shuttle on the ground on the gear....Touchy but it works! The 2 big RS 25 and the big tanks are the only thing abandoned in space Screen of the Martian Shuttle mounted on the back of the StratoMaX. The 2 big rockets are strut to the shuttle via a center pilar and 2 Staging docking ports, the first one to launch the Shuttle, the second one to leave the rockets... Once the Shuttle is in parking orbit, the StratoMaX, having flown along South American coast from Kourou to launch in orbital plan, has got just enough fuel to make a right turn to reach the coast and land somewhere in the land as it is not possible to have more than 1 airport... The StratoMaX can also land on the sea very well; if necessary.
  11. Hello guys I introduce the StratoMaX : This RSS Stratolauncher is able to launch 315T or more at a speed of more than 5500m/s (around mach 17) at its ceiling of 48500m. Playing RSS Earth we need 7600m/s to reach orbit This is a 1600T plane with OPT MK2 central cockpit and 20 OPT J61 TurboRamjet "Starwaster" engines (diameter 2m50) , giving a TWR >3 at the 48500m ceiling Here is the monster Screen of the engines Many many wings, winglest and stabilizers as we need to pilot this thing at 48500m with a nearly 0 m/s vertical speed before launching. Here is the Martian Shuttle, with 2 ejectable rockets, that allow the shuttle to reach orbit with nearly its full 16000DV range. The 4 engines Shutlle are working on LF taken in the stratolauncher tanks to help for climb, but they switch off long before reaching the ceiling. At launch, they are relight in Closed Cycle and run with the 2 RS 25 from RealScaleBoosters taking their fuel from the lower ejectable tanks so that the Martian Shuttle range can be maximum at orbit There is a rover with 2 seats in the cargo hold and it is ejected during Martian ground approach and it lands with its own parachutes. Mars approach is performed retrograde, parachutes get out when speed is lowered under 800m/s by engines around 25000m.. Then approach is completed with engines and chutes in retrograde. Near the ground 2 back landing struts are supposed to help the back touch and give an impulse to lower the shuttle on the ground on the gear....Touchy but it works! The 2 big RS 25 and the big tanks are the only thing abandoned in space Screen of the Martian Shuttle mounted on the back of the StratoMaX. The 2 big rockets are strut to the shuttle via a center pilar and 2 Staging docking ports, the first one to launch the Shuttle, the second one to leave the rockets... Once the Shuttle is in parking orbit, the StratoMaX, having flown along South American coast from Kourou to launch in orbital plan, has got just enough fuel to make a right turn to reach the coast and land somewhere in the land as it is not possible to have more than 1 airport... The StratoMaX can also land on the sea very well; if necessary.
  12. Not a problem, before trying, I duplicated my KSP game file, so that I could be able I could be able to throw it all if it did not work. But I wanted to know is if you are able to create OPT engines running on dual mode with LFO and others OPT engines running on dual mode in LH2O. That would be great!
  13. @JadeOfMaar Here is a study with OPT engines using LH2 on RSS (not RSS/RO with FAR) I insert the ModuleCryoTank module as recommended after having updated OPT Legacy and OPT Reconfig. What is important to notice is that, in this case, I got all OPT engines working only on LH2O. There's no more possibility to have a choice between LH2O or LFO. Then I compared performance of my Raptor 4546 which is designed to be launch in high atmosphere by Stratolauncher in RSS mod and OPT mods before the last update, the last update not working with LFO OPT engines and Tweakscale. So here are 2 screens in high atmosphere where the spaceplane is launch: Engines are J81 hybride engines 1/ with LFO , closed cycle: Weight 151T , DV 13800 and TWR 1.3 2/ with LH2O, closed cycle : much larger spaceplane with only 2 engines instead 4: 125T, 14200DV, TWR 0.90 TWR is better because in high atmosphere, in RSS, once in LH2 there's no need to get high TWR. The plane is lighter to launch, but we need larger aircraft because with the "LFO" design we don't get enough LH2O in the tank to get similar DV Now 2 screens in low atmosphere on the base 1/ with LFO on airbreathing: more than 23000DV and TWR 1.81: we don't need that DV in Airbreathing, but it's the consequences of the TWR we need at launch in high atmosphere for a quick acceleration to Orbit. Lowering TWR don't give so much more DV and the 1.3 TWR is a good compromise. 2/With LH2O in low atmosphere: only 7800 DV with TWR 1.26. This TWR is the consequence of the high atmosphere TWR. We can see clearly that LH2O is not interesting in low atmosphere for DV In conclusion: 1/LH2O must be use only in High atmosphere, the good thing being lighter spaceplane, and the dark side being much larger airplane, which is harder to launch with a Stratolauncher. But it could give more range! 2/I do not know if it is due to tweakscale mod, but if there's no choice on OPT engines between LH2O and LFO, LFO remains the best option to launch spaceplane on RSS, because it's impossible to build a Stratolauncher on LH2O only
  14. About the rocket and this particular ascent guidance mod in RSS, you can look my vid for the Apollo Anniversary. On the french KSP we had a Challenge for this and I built a Saturn rocket to send Apollo 11 on the moon. you will see the ascent and the lower TWR on second stage. You ll find also other vid of the mission On Mechjeb the selected ascent mod is Primer Vector, wich is different from the link i gave you, but it looks like mechjeb has been updated and the method name was changed, but i think it is the same method as all other climb datas remains the same.. look at the Time to Apoapsis during all climb on the upper left HUD and you will understand how it works
  15. Hello in fact to see what is the best guidance on RSS, this is here https://github.com/lamont-granquist/MechJeb2/wiki and the best thing to do is built a rocket to see that working with mechjeb and as you say twr<1 is better on upper rocket stage with cryo engines using LH2 and Oxydyzer. But here it’s a Space Plane with OPT mod and last updated OPT engines and tanks that work with LH2 don’t work with Tweascale, there’s a big mess for the time being, and i did not updated OPT mod for this reason.