Eve and Back for 11 Kerbal tourists - no refuel

[gilflo]

Since I discovered the SIGMA pod, "voyager" class, for 11 kerbals, I imagine how to send them to Eve and back
Challenge was to find the right design fora lander able to take off this pod with 11 Kerbals from Eve to orbit and continue to Kerbin and for a launcher able to send it to Eve and set it in orbit.
-The pod had to sustain Kerbin atmospheric entry: Easy because shield is included
-The lander had to be able to join at least a 100kms orbit around Eve and make it to Kerbin with or without  external shuttle.
-The lander had to land only on chutes to minimize fuel.
-The lander had to be equipped with a desorbiting system, a shield system for Eve interception and a shield system for Eve descent.
-Gears, RCS engines, chutes, ladders had to be ejected on Eve take off.
-No refuel on Eve.
-Design had to allow 11 Kerbals to EVA on Eve
-Launcher had to be able to launch the lander fully equipped on Kerbin orbit, send it to Eve, make it intercept Eve orbit with enough spare fuel to intercept in case aerobraking interception won't be efficient
-The lowest count of pieces

Here's VoyagEve fully equipped: 356T to launch - 251T on Eve landing - 235T on Eve take off
54 MK2 chutes et 6  MK16 chutes allowing 8m/s vertical speed on landing de 8m/s easily support by 12 ejectable landing gears.

3 lower asparagus stages, plus 2 upper asparagus stages, upper center tank being ejectable before Kerbin landing.
At the top: ejectable shield, speedbrakes and RCS tank, at the bottom, ejectable desorbiting system plus entry shield.
Engines:Tweakable RS 25 Space shuttle main engine, best ratio for mass/TWR/DV on Eve take off. Aerospike engines are not interesting for big weight landers.

here's the launcher, only 3 engines, with the fairing including the equipped lander: total weight 2761 for a  356T charge 
Engines: Tweakable RS 25 Space shuttle main engine, still the best engine for heavy weight to lift
 
This launcher is far better performant than the one i used for Evalander to send 2 kernels to Eve.

When we will be in orbit around Eve, the ELEA B9 craft piloted by the 2 Kerbals arrived with Evalander, will reckon the best landing site on VoyaEve orbital trajectory.

I want to land near the sea on orbital trajectory, because we have few maneuver margin to choose a landing site outside orbital trajectory.

Launch

Inside Sigma pod during launch

Fairing ejection at 23Kms

Separation of asparagus engines and tanks at 44kms

From pilot seat

Departure to Eve

Aerobraking at 74kms for Eve interception is not efficient,  we will have to use the launcher main engine to shut the orbit, then we will aerobrake

Launcher ejection

More than 10 orbits on aerobraking to establish a 110kms orbit

End of de orbitation. 

Altitude 34kms, hottest point on entry.

Altitude 19kms, we are very near of  "target site" (red cross)

Altitude 13 kms: ejection of top (Speedbrakes,  RCS tank)

8500m, chutes out

950m: MK16 open, vertical speed 67m/s

650m: total opening of chutes, VS 8m/s, gears down, shield ejected

24m nearly on ground

ELEA B9 reckoning aircraft: Low altitude pass over VoyagEve

 

First Kerbal Eva

11 Kerbal in circule waiting for sunset

11 Kerbals and the sunset over Eve mountains

The Vid

 

Edited July 28, 2016 by gilflo

[gilflo]

I made mistakes, please can you suppress my 3 older topics open with the same title?

Thank you

[Vanamonde]

Got 'em.

[gilflo]

Today I launch a tourism twin engine aircraft to join my Kerbal tourist waiting on Eve

Perfect launch

Orbit at 610 kms, we wait launch window to Eve
Then we made Eve orbit interception by aerobraking on a 70 kms Periapsis.

Now we got a good experience for design and Eve entry procedures for aircrafts and landers
For aircraft, prograde entry protected by an ejectable shield, and balanced by a big tank and its engine used for Eve injection and de-orbitation.
Approaching periapsis under 70kms, we close the orbit an get an 1500 km apoapsis after first pass, no using any DV

2 passes, periapsis 73 then 75 kms and we get a circular 110kms orbit with the expense of a few DV.
Aerobraking for entry begins at around 50° from target, we are not aligned but it's not a factor as we will join the target by flying when in aircraft mode.

Descending speedbrakes open (very important for balance), bank 0°. Authority limiters are set to 150 on tank winglets as well as on pitch flight controls on airplane. Roll and rudder are de activated.

descending on prograde to 20kms without RCS. Flight controls are efficient enough to maintain
Below 20kms, Speedbrakes shut, ASAS OFF, the whole thing slightly raise nose to horizon. Then ASAS on Retrograde and RCS ON to raise nose over horizon allow to eject shield then tank

ASAS OFF
The plane lower the nose.
Atmosphérique autopilot ON (not really an autopilot) 
just a "fly by wire" mode like A320,  -allowing fluid joystick piloting, awesome!!.
All flight control "Authority limiter" around 60, activation of rudder and ailerons. Engines ignition.

Looking at the ScanSat map we set heading to target.  Cruise control mode, it's an AP to maintain level flight, allowing time warping....

Descending on target, 430kts-85m pass over VoyagEve and the tourists

After a 2nd pass we come to land

Everybody is boarding. long process, there's no jetway herei!!!

You cannot see the cabin windows, they are below the wings so that the passengers can admire Eve

To follow

Edited August 1, 2016 by gilflo