OHM Design Reference Mission 1 v1.4

[OrbitHangar]

Author: markp

NASA Mars Design Reference Mission 1. Includes a cargo lander that can deliver a Mars Ascent Vehicle, pressurised rover, solar heated balloon, gas balloon and a fission reactor to the surface. Also included is a habitat lander that has wheels so it can moved next to a second habitat to provide a large living volume. Also included is a basic NTR propulsion stage and an Earth Return Vehicle. This add-on includes guidance programs to enable  landers to descend from orbit and make landings close (less than 100 metres) from a chosen target (base or vessel). See documentation for further details.  

Main updates for v1.4:

1. Improved programs for precision landings
2. Earth Return Vehicle
3. improved aeroshell visuals
4. Large greenhouse
5. Sounding rocket launcher
6. Mars wind forces added to parachutes (can be switched off)

DOWNLOAD

 

[RichWall]

Thanks Mark

 

[IronRain]

Great! Thanks

 

[Fabri91]

Great, thanks! I've got a question, would it be possible to implement UMMU? It's just nitpicking, I know :blush: I'll start planning a Mars mission now

 

[markp]

Yes I've been thinking of making UMMU compatible. That's a good possibility!

 

[Wishbone]

Downloading now... BTW, am currently testing a DRA 5.0 nuclear core stage...

 

[Interceptor]

Any way that you could make this UCGO?also.Thanks

 

[markp]

Most probably.

 

[markp]

Small update on Orbit Hanger Mods. Just added a connector to use with Wishbone's NTR propulsion core, docking port added to the aeroshell mesh and some small updates in the documentation.

 

[jgrillo2002]

Is it just me or you forgot to add the aeroshell meshes. when I started up the orbit scenario it showed this.

 

[Interceptor]

Hey MarkP, do I need to use ArtLavs meshlandv1.92 in order to use the Nanedi Valles terrain,you said to download?Thanks

 

[markp]

Interceptor, Meshland isn't required as I've adjusted the height of the mesh so at the landing site it is at the same level as the Mars surface. If you install the Nanendi Vallis first and then the DRM1 addon it will overwrite the original config file with a new one with the mesh adjusted to the required level.

jgrillo2002, the aeroshell meshes are in the addon. It might be a scenario related problem. I found when running a scenario from v1.2 that I get a similar configuration for the habitat lander as in your image but the cargo lander has its aeroshell. I'll look into it some more.

Cheers,
Mark

 

[Wishbone]

Flying the solar balloon. I suppose Orbiter can't handle extraneous forces with more than x100 acceleration. Two things:
a) there should be a warning in the docs to instantiate the balloons only with Orbiter paused and putting it on the ground of Mars and unpausing afterwards (else it CTDs).
b) when the balloon is in flight, launch shortcut should be disabled (else it CTDs).

BTW, this sound you have been hearing since early this evening was my jaw hitting the floor. Repeatedly.

 

[markp]

Thanks Wishbone for finding that out! I was completely confused about what was causing the CTDs sometimes but it does seem to be related to the balloons!

I will add a "known bugs" section to the documentation and update the balloons soon.

---------- Post added 08-30-11 at 04:13 AM ---------- Previous post was 08-29-11 at 06:57 PM ----------

Well it seems to be connected with ShiftCOG which I use in the balloons code so Orbiter detects the landing points on the surface. Vessels with COG above a certain height (20 m?) seem to fall through the surface. I think using an animation just to simply shift the mesh might work.

 

[Interceptor]

Hello MarkP,first of I have to tell you that, I am enjoying this addon very much,but have a few bugs to report,and also a few requests if your taking any, if not it's cool!
Bugs finding. 1.I am finding that after using j to eject the cargo wheels from the habitat lander several times it CTDs.2 still no texture on the passageway between habitat landers,I see it in the earlier pics of this project on OF.OK questions,1.Are you going to texture the Press-Rover? 2.Could you please add action areas,one example would be to drop the cargo wheels from habitat lander with a UMMu.3.could you design a seperate UCGO cargo box, for the ballons,and reactor? Please don"t take this as a nit pick session it's not.Just putting in my 2 cents in.Thanks for all your great work on this awesome project.

 

[markp]

No problem Interceptor, good comments and suggestions. I think I will try to implement all of them!

 

[Interceptor]

I would also like to see the automated rover,and green house back in it, maybe you could convert them in to UCGO unpacking cargo.Thanks:thumbup:

 

[Wishbone]

An observation from the ascent vehicle: it is possible to get an UMMu inside, but it is not possible to get him out. Weird... just in case anyone plans on checking the ascent vehicle before lift-off.

On autopilots in the landers - I know they are automated, but a bit more debug info in the screen would be welcome, most of all related to miss distance and deviations from nominal trajectory.

 

[markp]

I tried with one UMmu and manage to return him to the surface before launching and also EVA after launch in space. I didn't try doing an EVA just after launch though.

With the descent program there is the closest approach distance which gives some information on how close you will get but it is a bit approximate. I imagine a more accurate miss distance could be calculated.

Regarding deviation from nominal trajectory. For entry that would require feeding the program a target location. That can be added. That would then give the possibility of flying the entry stage automatically with the program minimising the deviations by adjusting the angle of attack of the lander. This is something I've been meaning to do for a while. I imagine it will be quite easy but I've been putting it off because I still haven't updated my trajectory calculations to include sideways forces on the landers and I am still using a different (simpler) atmospheric model to Orbiter. It is something I will be addressing in the next several weeks I hope!

 

[jgrillo2002]

jgrillo2002, the aeroshell meshes are in the addon. It might be a scenario related problem. I found when running a scenario from v1.2 that I get a similar configuration for the habitat lander as in your image but the cargo lander has its aeroshell. I'll look into it some more.

Cheers,
Mark

Ignore that. I found out what the problem was and I was stupid. I launhed the older scenarios that were obsolete. everything is fine with that. Thanks.