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[1.2 - 1.4] Real Scale Boosters, 0.16 (2018-03-12)


NecroBones
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1 hour ago, NecroBones said:

I suspect it might have to do with the shuttle SRBs being an older design (technically speaking) and also having a lot of features that other boosters might not. They have recovery equipment and guidance in the nose cones, gimbal hydraulics, etc, and are designed to be refurbished and reused.

Yes, that is good reason for the disparencies. The Shuttle SRM is a '70s design and the one from Orbital is relatively new (since there is a whole line of RSRMs, from 1 to 5 segments).

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2 hours ago, VenomousRequiem said:

Well jeez, there's not much point in doing them then, huh? I tried. :l

Yeah, I had no idea anyone else was working on it until I was tagged in that.

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I've had some time to get back to some modeling, so I did a couple of things so far this week. I split out the Centaur's RCS thrusters and spheres to separate models (so they can be separately repositioned when squishing the tank with MM patches). I also went back to the Delta IV DCSSs and split the equipment platforms out as well, so those.

 

Also started on the Ariane V a little bit (I still have a lot more detailing to do at the bottom, but I want to fit it to the engine, so the engine needs to come first):

KSP%202016-02-09%2015-57-23-72.jpg

 

 

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11 minutes ago, NecroBones said:

Yeah, I had no idea anyone else was working on it until I was tagged in that.

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I've had some time to get back to some modeling, so I did a couple of things so far this week. I split out the Centaur's RCS thrusters and spheres to separate models (so they can be separately repositioned when squishing the tank with MM patches). I also went back to the Delta IV DCSSs and split the equipment platforms out as well, so those.

 

Also started on the Ariane V a little bit (I still have a lot more detailing to do at the bottom, but I want to fit it to the engine, so the engine needs to come first):

KSP%202016-02-09%2015-57-23-72.jpg

 

 

Every single mod I've seen fails to add the upper stage for the Ariane 5... Please don't be another one of those guys. :P

Looks nice though, yo. Do you need any help with modeling? I'd love to contribute!

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11 hours ago, Phineas Freak said:

@Felbourn @NecroBones OK, now i understand. I was confused because Orbital ATK also has a 4 segment SRM in the exact same form as the Shuttle one but it has a lower inert mass and more propellant.

That is probably the Titan IVB SRMU.   ATK Purchased Hercules Aerospace in 1995 half way through he SRMU production run.   And no, I have not seen a SRMU model yet for KSP (I am currently re-using FASA's UA-1207 "Titan White SRB" model for the SRMU in my personal configs.)   Crap tons more fuel than the UA-12xx series, Much lower overall weight (Carbon Fiber instead of metal.)

 

 

 

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1 minute ago, Pappystein said:

That is probably the Titan IVB SRMU.   ATK Purchased Hercules Aerospace in 1995 half way through he SRMU production run.   And no, I have not seen a SRMU model yet for KSP (I am currently re-using FASA's UA-1207 "Titan White SRB" model for the SRMU in my personal configs.)   Crap tons more fuel than the UA-12xx series, Much lower overall weight (Carbon Fiber instead of metal.)

 

 

 

There's some pretty nice Titan parts, including the SRMU in BDB!

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8 hours ago, Phineas Freak said:

Yes, that is good reason for the disparencies. The Shuttle SRM is a '70s design and the one from Orbital is relatively new (since there is a whole line of RSRMs, from 1 to 5 segments).

RSRM is any Shuttle SRB post 25th flight.   (Per Links posted already by Felbourn)

Sorry for the poor "SRM family tree" below but this is the evolution of the "SRM" as I understand it.

 

                                        United Technologies UA-12xx Series and UA-156 series

                                            |                              |

                                            |             Thiokol SRM Series 1 for Space Shuttle

                                            |             Thiokol SRM Series 2 for Space Shuttle (used in most of the first 25 STS missions)

                                            |                     Challeger Explosion

                                            |               Thiokol RSRM  (Structurally Beefed up SRM series 2 with new O-Ring design (please note that atleast part of one of the Final RSRMs to fly the shuttle had parts

                                                                                                                   from the ORIGIONAL SRM-1  from STS-01 (Columbia's first flight)

                                            |                       /       |

                                            |                    /          |

                                        Hercules SRMU (Replacement for the UA-1207 SRB on Titan IV)  Newest US made  Large Scale SRB (Technology and Design wise.)

                                                                           |

                                                           ATK-Thiokol/Orbital-ATK RSRM of various Segment count (Basically same RSRM as Space Shuttle, not a New Design and not new technology.)

 

 

Edited by Pappystein
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Yeah, the shuttle SRBs underwent a lot of evolution. That's something I'm running into with almost all of the rockets in this pack too. Since things change over time, I have to pick some reasonable numbers from somewhere in the timeline. Usually I'm going with some of the more recent numbers, but sometimes it ends up being more average.

 

16 hours ago, VenomousRequiem said:

Every single mod I've seen fails to add the upper stage for the Ariane 5... Please don't be another one of those guys. :P

Looks nice though, yo. Do you need any help with modeling? I'd love to contribute!

Heheh, maybe I should leave something else out instead, just to be different? :) Actually, what would be funny (though I wouldn't do this) would be to have all of the Ariane parts unlock at once, except the upper stage, which requires an expensive tech node unlock (maybe 10,000 science). Or something. lol.

 

Actually the kind of stuff that would be super useful, aside from RF/RO/RP-0 configs, would be a sensible list of career pricing for the parts and their unlocks. Right now all the prices are placeholders.

 

14 hours ago, LeoBlueSpikes said:

Is it compatible with realism overhaul?

 

As others have noted, not yet, but that is the goal.

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More detailing to work on, etc, but this was a fun little test of the Ariane V first stage:

 

KSP%202016-02-10%2000-07-59-15.jpg

Edited by NecroBones
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41 minutes ago, VenomousRequiem said:

What, did you just sit it on the launch pad and let it loose? 

 

26 minutes ago, KerbonautInTraining said:

What was the TWR in that configuration? I'd imagine it's pretty darn low.

 

Yeah, the TWR was less than 1, but I wanted to see the engine working (without rigging up something else to test it), so I just tried to "gently" tip the rocket over without it exploding. Once down on the ground, it slid along the crawler track, and into the VAB. The impact against the building destroyed the probe core, so it just stayed there, thrusting against the VAB doors. ;)

 

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4 minutes ago, Felbourn said:

Yeah, I've been looking at most of those and they don't seem to say anything about the separation motors.

 

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Ah crap I read it wrong and thought you wanted EAP stats. That said... one of those links DOES have the stats. I just did not need to link all the others things to dilute my answer.

Here we see it has 16 thrusters: https://nammo.com/what-we-do/rocket-motors/space-applications/ariane/ 

There are 4 at top, 4 at bottom: http://www.esa.int/Our_Activities/Launchers/Launch_vehicles/Boosters_EAP

They are angled ~45+ degrees to avoid the core: http://www.esa.int/spaceinvideos/Videos/2013/06/Sterex_images_of_ATV-4_launch

They are 18.9 kg of HTPB per motor, firing for 0.5 seconds, at 66-73 kN (a burst thrust curve).

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Sweet, thanks guys.

 

So far I've been ignoring separation motors on the lower skirts of the various solid rockets, since they can't be staged separately if they're built into the same part. But I may make radially-attached ones for that later. This of course is partially made up for by having separation charge and thrusters in the decouplers.

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