Wednesday, January 14, 2015

KSP: Crewed flight / Time speed data

Phase 2: Put a crewed capsule into orbit. 

I know that actually putting a Kerbin in space is hardly the dramatic event it was for the Russians, the Americans, or the Chinese. That being said, the mission was still a chance for me to symbolically take the "next step" and see what type of performance my Proton-1 rocket could give me with a crewed payload.

Individual Maned Crew Capsule (IMCC) Mark 1

Well, this certainly won't be making any interplanetary voyages, but the IMCC (mk.1) is a good, one-man orbital craft with a low mass and durability enough to get into orbit and back to the group. This specific unit relies on the internal gyros for maneuvering, and has a small engine for thrust. 

In terms of endurance, I can confidently sustain about half an hour of maneuver, but beyond that I will need additional power sources and probably RCS jets for more precise activities in orbit or beyond. 

The Flight

Fortunately (in game, and out) the mission was more or less as planned, and reached the objective of a 450Km apoapsis before returning to Kerbin for a wet touchdown three quarters of the way around the globe.

IMCC flight on the pad, moments before Launch. 


The ship was under power/thrust for only the first four minutes of the flight, after that, physics carried the ship for the rest of its 22 minute flight. The take-off and lift phase of the flight was smooth and topped out at 2504 meters per second speed when the engine finally cut off, and we reached a peak altitude of 452 KM above Kerbin. 

At the peak of my first crewed flight over Kerbin, 450 kilometers above the planet's surface. 

Flight Metrics

I tracking the flight and its numbers for my own interests, and to see how my Proton-1 design worked under a 1 ton load.

Like I said before, the ship was under thrust for only the first four and a half minutes of the flight, and I track the altitude and speed for that time period. also are the computer's projected Apoapsis at each moment, and I have calculated how far ( as a % of my current altitude) beyond my current altitude the ships inertia alone could carry me at each point of the launch. 

Its interesting to note that the real gains made in altitude are made once the ship crosses the 28K/1000 m/s mark.

       Time  Altitude (K)  Apoap. % of Alt Speed (M/S)
0:30 4.86 7.74 59.4% 231
0:45 7.40 8.24 11.4% 138
1:00 9.45 10.26 8.5% 141
1:15 11.13 11.88 6.7% 183
1:30 13.12 13.87 5.7% 251
1:45 14.65 15.49 5.8% 313
2:00 16.56 17.60 6.3% 396
2:15 18.72 20.12 7.5% 499
2:30 21.29 23.22 9.0% 265
2:43 23.85 26.66 11.8% 759
2:45 24.29 27.28 12.3% 785
3:00 28.00 34.91 24.7% 1055
3:15 33.35 49.94 49.8% 1407
3:30 40.36 93.78 132.3% 2027
3:45 49.30 437.63 787.7% 2530
4:00 59.53 450.50 656.8% 2504

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