ferram4 changed the topic of #RO to: Welcome to the discussion channel for the Realism Overhaul (meta)mod for KSP! Realism Overhaul Main Thread https://goo.gl/wH7Dzb ! RO Spreadsheet http://goo.gl/Oem3g0 ! Code of Conduct http://goo.gl/wOSv2M ! | Maximal & soundnfury's RP-1 Race Into Space Signup: http://bit.ly/2DEVm2i [15:01] <soundnfury> Straight Eight Stronk (and) RP-0/1 is basically "Space Agency Spreadsheet Simulator"
schnobs has quit [Ping timeout: 182 seconds]
<Starwaster>
bornholio, PSI alone won't tell me how much it has :(
<Starwaster>
(5700 PSI btw for boosters and 2nd stage)
<Bornholio>
yeah its insane
<Starwaster>
oops 5000 not 5700
<Starwaster>
looking at wrong document and got y wires crossed
<Starwaster>
if I knew the tank size I could combine the two and come up with some tankage....
<Starwaster>
I love how they mention that it is less contaminating than other propellants... never mind all the kerosene...
<Bornholio>
Rp-1 is very clean :P
blowfish has quit [Quit: Leaving]
Maxsimal has quit [Quit: webchat.esper.net]
TM1978m has joined #RO
TM1978m has quit [Remote host closed the connection]
blowfish has joined #RO
blowfish has quit [Quit: Leaving]
awang has joined #RO
Felger has quit [Quit: Leaving]
Hypergolic_Skunk has quit [Quit: Connection closed for inactivity]
aradapilot has quit [Remote host closed the connection]
aradapilot has joined #RO
SirKeplan has quit [Ping timeout: 186 seconds]
TM1978m has joined #RO
Mike` has quit [Ping timeout: 182 seconds]
Mike` has joined #RO
Moistmelon has quit [Ping timeout: 186 seconds]
Moistmelon has joined #RO
Shoe17 has joined #RO
camlost has quit [Ping timeout: 186 seconds]
TM1978m has quit [Remote host closed the connection]
Olympic1 has joined #RO
Olympic1_ has quit [Ping timeout: 182 seconds]
schnobs has joined #RO
Senshi has joined #RO
<schnobs>
OK, so Vanguard used to types of solid 3rd stage.
<schnobs>
Virtually identical dimensions (who'd have thunk), but the later model carried more propellant and had a better ISP.
<schnobs>
Currently we only have the later model in the game, as "Altair".
<schnobs>
Trying to make it work... I see that solids can have different engine configs as well (e.g Baby Sergeant).
<schnobs>
But does/can this allow for different propellant loads?
Hypergolic_Skunk has joined #RO
<schnobs>
Sounding rocket contracts have ever-increasing demands. This doesn't play well with tooling, and becomes patently silly at some point.
<schnobs>
(eyes "launch 590 units to 1260km" contact)
SirKeplan has joined #RO
<schnobs>
Or, 2056 units to 200km. That's 1t plus container, 1x3m Tank-I or 1x5m SM-I.
<Rokker>
Bornholio: what is with all these people believing the tomahawk shoot down claims. I would have thought that after 1618 tomahawks with minimal losses used on iraq, people would realize using AA on a Tomahawk is like shooting a bee with a machine gun.
<Bornholio>
schnobs use altiar remove tiny bit of fuel, rokker cause pantir is magic have you not heard, also see cheesewiz oh sorry CIWS
<Rokker>
Bornholio: I'm pretty sure you could accidentally shoot around both wings of a tomahawk with a pantsir
<Rokker>
Bornholio: tomahawks still approach super low right?
<Bornholio>
they don't not work, just effectiveness is low. but as per usual the missile systems are good. they may have shot some down, doubt the claims of dozens
<soundnfury>
hmm the lunar rover contract can't decide which spelling alphabet to use, second waypoint is either Bravo or Beta
<Rokker>
Bornholio: I mean if the missile still approaches as low as it did during 91, I don't see how you would even have time to fire a missile at it much less it be effective
<Rokker>
bravo
<Rokker>
beta is dum
<soundnfury>
agreed, Bravo is the correct one
<Bornholio>
you should get more money in a do nothing contract selling the rover to lord british
<schnobs>
Man, I haven't shifted around equations in decades.
<schnobs>
I have propellant mass, ISP, and burn time. How do I arrive at thrust?
<Bornholio>
simpleway find dV/burntime = avg accel, find average vehicle mass multiply
<schnobs>
good hint :)
<Rokker>
Bornholio: i went through some complex damn equation to find the actual burn time by mass flow and it ended up being more effort than it was worth
<Rokker>
well not complex, but lotta variables to mess with
<Bornholio>
yes, otherwise build a spreadsheet setup your variables and work through it
<Bornholio>
atleast your not doing pressure variable thrust
<Bornholio>
unless you are then good luck :P
<Bornholio>
schnobs is it a solid?
AmbulatoryCortex has joined #RO
camlost has joined #RO
camlost has quit [Quit: Konversation terminated!]
camlost has joined #RO
Felger has joined #RO
camlost has quit [Quit: Konversation terminated!]
<schnobs>
...much later...
<schnobs>
Bornholio: yes, it's about the GCRC config for the Altair engine.
<schnobs>
Do we have a mapping of existing thrust curves?
<schnobs>
One is a simple star, I just stole from a Castor for that one.
<Bornholio>
can't say i've looked closely at the curves in existing motors but thats a good assumption, star is nice because its easy and less prone to sparkler
<schnobs>
The other... I'd expect it to taper off noticably at a point between 50-70%
<schnobs>
So.. I've added an engine config, which now needs a place on the tech tree.
<Bornholio>
cool they have the estimate on sparkler loss and say they had zero but actual was 1-200fps, plus it had chuffing in partial vacuum of 250lbs
<schnobs>
I understood the 100-200fps to be unburnt remnants...
<Bornholio>
that core looks like a slight regressive
<schnobs>
I'd expect a swift start, then about constant thrust until most of the smaller chunk is gone.
<Bornholio>
has a a drop off in the curve about 3/4 of the way through when the notched pair is spent early
<schnobs>
In the specs, it says "shall not exceed X acceleration". I see how.
<schnobs>
And, just besides, I love the name of the Grand Central Rocket Company.
<schnobs>
first rule of rescaling models: don't forget to move the attachment nodes as well. Gets me every time.
<schnobs>
Bornholio: Looking at it again, the chunks are consumed not only from the inside out, but are becoming narrower as well.
<schnobs>
The big one should almost maintain surface area for a while but the small one shrivels; by the time the small piece is gone, the large segment is already quite small.
<schnobs>
This might resolve to a nearly liear dropoff.
stratochief has quit [Remote host closed the connection]
<schnobs>
The layer cake that is RP-0 config.
<schnobs>
Can't get it to work in my game...
<schnobs>
(at least in sandbox, though)
SirKeplan has joined #RO
<schnobs>
After a few successful tests (thrust needs tweaking), it now explodes from internal heat. What the?
mkalte has joined #RO
<schnobs>
solved: thrust just went way too high.
<schnobs>
unsolved: can't make it a config of the existing altair -- changing the fuel tank capacity doesn't seem to be within the purview of engine configs.
Probus has joined #RO
<Probus>
schnobs, I was impressed with your Mars mission. I am going to try it smaller scale.
<Probus>
Has anyone else tried a manned Mars mission?
UmbralRaptop has joined #RO
<schnobs>
NK did one, so long ago it's untrue.
<Starwaster>
is the use of rescaleFactor any more or less stable than the use of the size parameter in MODEL, with respect to the collider?
<schnobs>
Starwaster: I've been told to scale the model whenever available, but not to worry when I have to resort to rescale.
<Starwaster>
using some scaled up Falcon landing legs and I've noticed they have a tendency to collide with each other on my Falcon 18 Heavy
<Bornholio>
probus, yes with isru and yes with ntr methane nukes