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Author Topic: [DGIV BLOG] News about developpment of DGIV (part 3)  (Read 19527 times)

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Offline Orbiter Fan

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Reply #50 - 05 May 2007, 03:23:52
Quote
willy88 wrote:
And besides, if you even tried to reenter, you would be burnt to a crisp.

How come? The Soviet Veneras that landed on the surface made it through entry and landing with no problems. What
got them was the pressure and heat on surface.


Offline Pagir

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Reply #51 - 05 May 2007, 03:29:22
Quote
Orbiter Fan a écrit:
Quote
DanSteph wrote:
Quote
sunshine135 a écrit:
Ascent from VENUS?????    :doubt:

I'm on mars yet... I'll try venus once mars completed.
Maybe with 80° ascent until out of atmosphere ?
don't know.

Dan
Dan, if you want to be really accurate, an ascent from the surface of Venus is not possible. The external atmospheric
pressure is so high that the nozzles will be plugged toghter. So the engines becomes totally useless and will most
likely explode if fired for any significant time period due to excessive high pressure in their Main Combustion
Chambers.

This why it is so important that the rocket engines is 100% free from any form of contamination.

In fact, with the "stock DG", you can't ascent from Venus due to this atmospheric pressure, too high to allow any
pushing effect from the rocket.

So I think you're right.

Pagir


Pagir

Offline sunshine135

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Reply #52 - 05 May 2007, 04:14:18
Quote
Pagir wrote:
Quote
Orbiter Fan a écrit:
Quote
DanSteph wrote:
Quote
sunshine135 a écrit:
Ascent from VENUS?????    :doubt:

I'm on mars yet... I'll try venus once mars completed.
Maybe with 80° ascent until out of atmosphere ?
don't know.

Dan
Dan, if you want to be really accurate, an ascent from the surface of Venus is not possible. The external atmospheric
pressure is so high that the nozzles will be plugged toghter. So the engines becomes totally useless and will most
likely explode if fired for any significant time period due to excessive high pressure in their Main Combustion
Chambers.

This why it is so important that the rocket engines is 100% free from any form of contamination.

In fact, with the "stock DG", you can't ascent from Venus due to this atmospheric pressure, too high to allow any
pushing effect from the rocket.

So I think you're right.

Pagir



This was the reasoning for my  :doubt:
Venus has such a high density atmosphere that if you cut engines in the atmosphere, you will float down at about 30 knots.
Surface temperatures at 900 degrees F. Not a DGIV friendly place at all.

Now I do recall a that the stock DG in the realistic flight model will NOT allow you to take off, and your engines are
rendered inoperable at a certain altitude.

You would almost have more luck flying through Jupiter's atmosphere, but the gravity is what kills you there.

Maybe a Titan ascent though Dan???????


"Sun Dog"

Offline DanSteph

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Reply #53 - 05 May 2007, 04:23:19
I succeded to do an ascent from venus in DGIV, anyway I'll not "officialise" this "cheat"
if one want to do that he'll have to do it manually.

Dan


Offline Jay Gatsby

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Reply #54 - 05 May 2007, 05:43:47
Hmm... rather than hard-coding ascent programs for each planet... wouldn't it be possible to derive an ascent
program given the density of the planet (of course, if need be, density = mass / volume, and if need be, volume =
4/3*pi*radius^3), the density of the atmosphere given as a function of altitude (a little more complicated, though still
very do-able), and the DGIV's current state vectors (shouldn't be a big deal)

It would be my pleasure to do all of the mathematics and post my findings (I do math as a hobby ;) --that's no joke),
but someone would need to give me all of the information about the environment that a MFD knows, as I do not have
any way of finding out myself (I have Microsoft Visual Studio 2005, and it goes ballistic every time I try to build orbiter
SDK compatible projects)


-Gatsby

Offline DanSteph

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Reply #55 - 05 May 2007, 11:07:44
Quote
Jay Gatsby a écrit:
Hmm... rather than hard-coding ascent programs for each planet... wouldn't it be possible to derive an ascent
program given the density of the planet

I post again what I replied in french to picto: ;)

Ascent Autopilot if dated four years ago for the first DG, doing it now I would do
a "general" autopilot were you enter the wanted altitude and it would do all the job.
Problem is that my time is largely over, I must absolutely release DGIV and other
addons within a short time and such autopilot take time to do.

Dan


Offline yoann

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Reply #56 - 05 May 2007, 11:17:15
Quote
DanSteph a écrit:
[autopilot take time to do.

Dan

hhhooo, arf, on a tout le temps !!!! :badsmile:


__________________________________
    Luke, je suis ton pere            kchuuu  pchiiiii

Offline DanSteph

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Reply #57 - 05 May 2007, 12:28:02
Quote
yoann a écrit:
hhhooo, arf, on a tout le temps !!!! :badsmile:

Pas moi, c'est la cata financiere et au lieu de bosser je fais du Orbiter...

Dan


Offline Heywood

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Reply #58 - 05 May 2007, 14:56:47
L'idée d'un Ascent Autopilot "General" est très bonne; malheureusement manque temps.  :cry:


Heywood



Offline willy88

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Reply #59 - 10 May 2007, 04:51:43
I have 2 possible ideas that might actually work:

1. When you are landed, and have external power connected, there could be a cable that connects to the DGIV.

2. When you connect to an external fuel line (while on the ground), a truck (yes, I know it has been suggested before) could
appear out of nowhere (no need for animations). When on Earth, it could be a regular fuel truck, but on any other planet/moon
it could be some sort of moonmobile.

No animations would be needed, and it would probably be fairly easy to code.


_________

Offline willy88

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Reply #60 - 10 May 2007, 06:07:29
And 2 texture-related things:

1. All the skins, except for the ATV skin, don't have the cargo bay "lines". Could this be fixed?

2. Some of the textures remain from the original DG MKIII (like the airlock, cabin.), it may be a good idea to improve them
so that they will look less "old".


_________

Offline tritoch

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Reply #61 - 10 May 2007, 10:29:55
Quote
willy88 wrote:
And besides, if you even tried to reenter, you would be burnt to a crisp.

i managed to reenter venus with a dg3 and all it did was have a lot of friction
it took 1.5 hours


if im online then im online [now you're offline, user banned]

Offline willy88

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Reply #62 - 10 May 2007, 22:31:59
What does anyone think of my suggestions?


_________

Offline Nouzy

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Reply #63 - 10 May 2007, 22:35:50
Quote
willy88 wrote:
What does anyone think of my suggestions?


I think it's too late now.


-------------------------------------------------------------------
Man I gotta love this site's wide array of smielies.

Offline Voyager

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Reply #64 - 10 May 2007, 23:00:20
Quote
willy88 wrote:
And 2 texture-related things:

1. All the skins, except for the ATV skin, don't have the cargo bay "lines". Could this be fixed?

2. Some of the textures remain from the original DG MKIII (like the airlock, cabin.), it may be a good idea to improve them
so that they will look less "old".

Well look at modern day, at least over here, sometimes the entire side of the bus is covered in a advertisement, and the only
reason you know where to get in is because part of the advertisement swings open ;) Why bother with making ugly lines through
your advertisement on the ship because the cargo bay doors happen to be there? they only open a few times during the whole
mission anyway :)

They dont look old at all, classy is a better discription. Besides, if you stuff hi-res texures in it, framerates will drop,
and some people with low end systems are already struggling at times.

Not to mention that we need to give Dan a break, he's gone way beond what we could ever expect of the DGIV, and all that
efford comes without a pricetag. I'd say let him polish the edges a bit (bug fixes, ect) and be gratefull with what he's
given us, and let him get on with some work that actually pays the rent ;)


Offline DanSteph

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Reply #65 - 11 May 2007, 01:54:45
[BLOG]

Just finished the "more download" page for the DGIV, for now it's in test, if you want you can try upload things and
shake it a bit.

It's here:
http://orbiter.dansteph.com?disp=dgIVMore

Dan



Message modifié ( 11-05-2007 10:31 )


Offline DanSteph

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Reply #66 - 11 May 2007, 02:05:25
who's the guy that have put "3 hits" on each download ? :)

Dan


Offline Jay Gatsby

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Reply #67 - 11 May 2007, 02:09:37
Umm... I downloaded each one exactly once... there were two hits on all of them when I first looked at it... so it
has to be a combination of people, I would say...


-Gatsby

Offline DanSteph

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Reply #68 - 11 May 2007, 02:12:39
I thought it was picto :badsmile: he love do such things "hidden message"

Dan


Offline picto

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Reply #69 - 11 May 2007, 02:15:55
Who rated zero for the Smile skin of Spit ?



Message modifié ( 11-05-2007 02:16 )

Pic

Offline sunshine135

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Reply #70 - 11 May 2007, 04:24:27
I just tried an "upload". Very user friendly Dan. If you can post on the forum, you can add and add-on. You can even preview
what you post just like on the forum.  :top:

Now, will Dan post my add-on? That is the question.  :wonder:


Cheers,


« Last Edit: 11 May 2007, 05:38:45 by sunshine135 »
"Sun Dog"

Offline MattNW

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Reply #71 - 11 May 2007, 05:38:45
Just uploaded a scenario file. It's a rescue mission. Not complete. Not even tested to see if it works but anyone is welcome
to download it and see what you think. The upload went quite painlessly and everything seemed to work OK. I had more trouble
uploading the image to Photobucket than I did to your site.


« Last Edit: 11 May 2007, 05:38:45 by MattNW »