Explorer 1 (First Scientific Satellite) | Mike Plays RP-1 #23 | KSP
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- čas přidán 1. 07. 2024
- I put my new Atlas / Stentor lifter to work putting up my first scientific satellite. As well, the X-Planes Program is completed by finishing the Hypersonic contract.
Contracts Completed:
► Crewed Speed Record of 2000 m/s.
► X-Planes (Hypersonic).
► First Scientific Satellite.
► Uncrewed Altitude Record of 2000 km.
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Computer Specs:
► 8-core 3.59 GHz CPU
► GeForce RTX 3080 Ti
► 32 GB RAM
KSP 1.12.3
Complete List of Mods:
RP-1 v3.2 (use express install on CKAN):
► Advanced Jet Engine
► AlphaMensae's Modular Launch Pads
► AtmosphereAutopilot
► B9 Aerospace Procedural Wings
► CanaveralPads
► Chatterer Extended
► Conformal Decals
► Contract Configurator
► Custom Barn Kit
► Custom Pre Launch Checks
► Distant Object Enhancements
► Editor Extensions Redux
► Environmental Visual Enhancements Redux
► Ferram Aerospace Research Continued
► Firespitter
► Hangar Extender
► Kerbal Alarm Clock
► Kerbal Joint Reinforcement Continued
► Kerbal Konstructs
► Kerbal Renamer
► Kerbalism
► Kopernicus Planetary Systems Modifier
► KSC Switcher
► KSP Community Fixes
► KSP Wheel
► Lunar Transfer Planner
► MechJeb 2
► ModularFlightIntegrator
► ModuleDepthMask
► Parallax
► PlanetShine
► Procedural Fairings
► Procedural Parts
► RCS Build Aid
► Real Antennas
► Real Fuels
► Real Plume
► Real Solar System
► RealChute Parachute Systems
► RealHeat
► Realism Overhaul
► Realistic Progression One
► Restock
► Restock+
► RO Capsules
► RO Engines
► RO Heatshields
► RO Solar
► RO Tanks
► RSS CanaveralHD
► RSS Date Time Formatter
► RSS Visual Enhancements
► Scatterer
► Shabby
► Smokescreen
► Staged Animation
► SXTContinued
► Test Flight
► TextureReplacer
► Textures Unlimited
► Toolbar Controller
► Transfer Window Planner
► Tundra's Space Center
► TweakScale Redistributable
► Ven's New Parts
► Waterfall
Additional Mods:
► Camera Tools Continued
► Contracts Window +
► kOS: Scriptable Autopilot System
► Minimum Ambient Lighting Updated
► Navball Docking Alignment Indicator
► Parking Brake
► Smart Parts
► Waypoint Manager
0:00 - Today's Plan
2:45 - Designing the X-7a
6:48 - First Scientific Satellite Contract
8:46 - Designing the Payload
12:18 - Making the Explorer 1
14:30 - Brain Fart
16:36 - X-Planes (Hypersonic)
20:22 - Robbed
23:15 - Launch of the Explorer 1
26:38 - Deploying the Payload - Hry
I'm gonna miss this series while you're making the stock tutorials. Can't wait for you to come back to it!
I like this series and I’ve learned a lot from it, but I have to say your tutorial videos are where you really shine. I’m looking forward to this.
Kinda sad you are taking a breake, but I can't wait to see the tutorials back🎉
Cheers for doing these I’m still stuck at suborbital
Watched this vid and decided to download the mods about to play seems like so much fun!!!
So love the series!! Really got me into playing along, though without planes. The amount of time you seem to have spent on planes is just insane! Can't wait for you coming back to the series an do more rockets, for better (footage / time) ratio!
Now that the X-Planes program is done, I'm not sure when I'll be getting more planes, but yeah, they take a long time.
I'm not sure if you can get much more out of the rocket by changing the launch profile, AFAIK it's using algorithms from a NASA paper to run these launch which I'm told is "optimal if we ignore atmospheric effect" and they tweak the launch it a bit to try to avoid the worst of the atmosphere. I suspect that in this case it's lofting the launch to give the upper stages more time to burn to reach the required speed - and as a side effect it also minimizes the losses from air drag. But it certainly would be interesting to see if that theory actually holds up, there's a lot of hidden assumptions in this.
AFAIK a lot of real launches are "lofted" this way (due to weak upper stages?) and I'm confident they wouldn't be doing that if it wasn't efficient for them so I'd say it's at least plausible for this to be relatively efficient here too. IIRC most Atlas V launches are fairly lofted too due to the upper stage being relatively weak, one notable exception is Starliner which used the more powerful dual RL10 second stageto allow a shallower (less lofted) launch because while the much cheaper single engine Centaur could actually get it to the final orbit there would significant periods where Starliner couldn't abort safely which they knew NASA would never accept for a new crewed launch system. Falcon 9 tends to fly much straighter profiles since it's second stag is more powerful relative to the first stage even compared to the Atlas V first stage vs the dual-RL10 Centaur second stage.
I've been told that in RP-1 (and real launches) the most efficiencent way to launch tends to be with "bang-bang control" (IE never throttle down except as needed to limit dynamic pressure at Max-Q or preserve fuel in a central core without crossfeeding, otherwise throttle should always be at 100% or 0%), and that especially if the upper stages are "weak" or it's not allowed to coast it'll might will need to plan so that the orbit insertion burn ends as the craft just touches to the PE altitude (from above or below) - I agree that it looks weird but... suppoosedly from NASA papers. It kind of makes sense from an "get up to speed quickly to limit gravity loss" perspective. But intuitions are not always reliable for this.
Getting that "hit from above" profile right would be rather hard when controlling by hand but easy for a computer guided launch like this. Not sure if that profile would work that well in Stock KSP, it's marked for "RO" use and Stock has very different atmosphere profile to RP-1 (how much it thins with height and aerodynamic drag modelling are both wildly different). And we have a profiles that works reasonably well in Stock which is easy to fly even though it's very different from this.
Thanks. Still something I'd like to play with sometime. There's so many features to tweak. It feels like a rabbit hole that could go pretty deep.
Love the interesting insite dude!
Just in case you don't know, PVG does not work with unguided stages like your Baby Sergeant upper stage, so the orbital parameters you put in have little if any effect. In fact for unguided upper stages you're often better off coasting to apogee before staging, as the real Explorer 1 did. Also, changing parameters during flight - like switching hotstaging off - will mess up PVG's flight control.
I think it got updated to reasonably work with kickstages
I wonder if the "successful landing" criterion was cleared when some other vessel did a touchdown, or if the drop tanks survived landing.
If you go to 16:40 you can see that the land anywhere requirement is already great before the drop tanks are staged. I only noticed this after editing. I think it was triggered when the plane spawns on the runway before it is spawned in the air for the air launch. This didn't happen with other X-Plane contracts, but my guess is that something went wrong here.
What are the advantages of hot staging? I've never used it. I play stock (with only KER and Mechjeb) and it seems like there's no spin-up time for engines.
In stock there is no advantage, but many engines in RP-1 are subject to ullage. That means propellant needs to be forced down into the engine. One way of providing that is by starting the next stage engine while there is still thrust being provided from the previous stage.
@@MikeAben Thanks. I assumed as much but wasn't sure since is an option even in the basic game.
Heya how are ya btw I am the first 15th person to like