Problem DG to ISS, degrees of pitch for climb and launch heading?

[rocketdued]

oh ok. thank you sir. i'll see what i can find.

---------- Post added at 08:21 PM ---------- Previous post was at 08:20 PM ----------

no sir. im flying the stock deltaglider. i had the dgiv befor. but never tired flying it with out the autopilot. as a matter of fact my whole simulation is stock right now.

 

[Grover]

if you watch the "Align Plane" MFD, you can see which node you are launching from, for DN, launch at 042, for AN launch at 136, best ignition time is at arounf TN=300/400, depending on your ascent

as for pitch, theres usually LOADS of room for error, just get out of the thick atmosphere real fast (keep the speed down as well to preserve fuel) up to 20Km+, then just watch the orbit MFD for the values of ApA and Apt, dont let ApT get too high (thottle down) and pitch down as you approach target ApA (orbit altitude, aim for 250) to prevent that getting too high, its a bit of a balancing act, but it always works.

if you want a short guide:
First, get out of the thick atmosphere REAL quick, staying slow preserves fuel
then as you level off, watch ApA and ApT, throttle to control ApT (T for Throttle) keeping it below 500 (120 as you get very high up) (high throttle, it goes up, low throttle, it goes down), you're also better off keeping it above 40, so you dont pass it by mistake
lift your ApA by pitching up, lower it by pitching down, the balance point isnt too hard to find, just do some searching and watch the numbers

once ApA reaches the target altitude, cut the engines and coast to it, then burn PROGRADE to lower ECC to 0 (have a circular orbit)

then you're in orbit! move on to alignment, ejection burns

good lucl
-=Grover=-

 

[rocketdued]

ok. i'll give that a shot. i was takeing off full throttle. so maybe i'll back that down a little bit as well and see what happens

 

[Grover]

make sure to watch the ApT as you adjust throttle, it reaches a point where its too low for you to push it away, and too high for you to catch up before insertion.

and for goinf to the ISS, aim for ApA around 250, giving you room to intercept

 

[rocketdued]

oh ok. well im gonna try a practice run. i just got off the ground im at 11.79 km's right now and climbing.

---------- Post added at 09:19 PM ---------- Previous post was at 09:06 PM ----------

well that was a waste of my time. i got it to 38.9 km then the flightpath indicator started falling. it kept going till it got to 10 degrees nose down pitch and the deltaglider followed suit. and to keep it climbing i had to keep hitting the num2 key other wise it's nose would drop and would not climb any more. i know it's a space craft and not an aircraft. so im not wasteing any one elses time to try and learn something that does not work. :compbash:

 

[Fabri91]

It does work indeed very well.
Have you tried to apply pitch-up to the elevons? It's the "Delete" key. "Ins" key for pitch-down trim. Otherwise, yes, you have to keep pulling up a bit, the DG is a bit noseheavy.

 

[Loru]

did you turn on RCS thrusters and set them into ROT mode?

 

[Grover]

hang on there a second! describe to me EXACTLY what happened, and ill try to help you out.

i think you pitched down too early, or climbed too quickly, lowering your ApT too much. what happened was you PASSED your Apoapsis (the high point of your orbit) and began descending, after that happens, there is little hope for reaching orbit.

you need to watch your ApT as much as your ApA, ApT is the time you will take to reach the Ap, if it gets low, you are too close to te Ap and your burns will have little effect on it (you wont push it up or away from you, so you cant control your ascent very well)

maybe i was a little vague due to my own experience, you shouldnt be pitching down to 10* at 30KM, try holding pitch of 40 until you reach 70Km, using only thottle to keep your ApT at around 500 (DO NOT LET THE FLIGHT INDICATOR DROP BELOW THE ARTIFICAL HORIZON, pitch up if this happens)

good luck man, keep at it, you'll be able to do it sooner or later

 

[rocketdued]

yes sir. i applyed nose up trim. and i switched the rcs thrusters to rotate at 30 km's as it states in the manual tex wrote. and didn't accomplish any thing.

 

[Grover]

did you hear the RCS firing as you [attempted to] pitch up?

 

[Carmen A]

Unlike conventional aircraft, our huge spaceplanes handle like bricks. Very fast flying bricks. You can't fly in the thin upper atmosphere by pointing your nose at the horizon you have to manage the lift vector by looking at vertical speed and acceleration in your Surface MFD.

 

[rocketdued]

It does work indeed very well.
Have you tried to apply pitch-up to the elevons? It's the "Delete" key. "Ins" key for pitch-down trim. Otherwise, yes, you have to keep pulling up a bit, the DG is a bit noseheavy.

Gee where have i heard those words befor? arn't those the exact words i said i when i first started trying the deltaglider? but was told that i was WRONG? i have been trying to get that point across for about a month now. that the deltagliders nose heavy as for when i take off i get to 100 km's per second. i turn to the right to 140 on the heading. and then pitch up to 50 degrees. i can't hold that for very long as i have tried. and then yes i switch on the rcs thrusters. which is joke. becuase witrh the flight path indicator falls to 10 degrees nose down pitch the deltaglider follows the flight path indicator. now i can sit here and fire the rcs thrusters untill in runs outta fuel. i still don't do any thing. this is about 150 TIMES i have said this. HOW CAN I MAKE IT MORE CLEAR? AND DESCRIPTIVE THEN THAt? :compbash:

 

[garyw]

You are doing something wrong. It works fine here. I can also say that I've never found the DG nose heavy. Certainly when you are too slow it is.

It's very hard to work out what you are doing wrong rocketdued. Maybe if you posted a video of your ascent in the same way Tex has posted video tutorials we can help more.

 

[Zatnikitelman]

Why don't you try a faster takeoff speed? I believe I normally rotate around 150m/s for the Deltaglider rather than 100m/s as you indicate.

 

[rocketdued]

well either im really stupid or i can't work a keyboard. cause with all the posts i have made on this forum i ain't no farther ahead then when i started. because im reading what you all have been telling me. and what im told and what the simulation does is two differrent things altogether.

 

[garyw]

well either im really stupid or i can't work a keyboard. cause with all the posts i have made on this forum i ain't no farther ahead then when i started. because im reading what you all have been telling me. and what im told and what the simulation does is two differrent things altogether.

Further, not father.

All I can say is the information people have given you is correct. Everyone who has attempted to help have successfully made it into orbit. Either you have a serious problem with the machine/install/DG faries or orbiter isn't for you.

I'll repeat my suggestion of posting a video of your ascent.

 

[rocketdued]

i think it's the simulation. im not blameing a 2 month old computer. and sorry i forgot the kings english as im american!!! now i know it's not the install cause my machine tells me it's installed correctly. and i can't post a video because i have said it befor and i'll REPEAT IT. i don't have a way to make a video.

 

[garyw]

Let's take this one step at a time.

i think it's the simulation.

im not blameing a 2 month old computer. and sorry i forgot the kings english as im american!!!

further and father mean the same in American English as they do in British English.

now i know it's not the install cause my machine tells me it's installed correctly.

And how does it do that?

and i can't post a video because i have said it befor and i'll REPEAT IT. i don't have a way to make a video.

Find one.

 

[Tex]

Gee where have i heard those words befor? arn't those the exact words i said i when i first started trying the deltaglider? but was told that i was WRONG? i have been trying to get that point across for about a month now. that the deltagliders nose heavy as for when i take off i get to 100 km's per second. i turn to the right to 140 on the heading. and then pitch up to 50 degrees. i can't hold that for very long as i have tried. and then yes i switch on the rcs thrusters. which is joke. becuase witrh the flight path indicator falls to 10 degrees nose down pitch the deltaglider follows the flight path indicator. now i can sit here and fire the rcs thrusters untill in runs outta fuel. i still don't do any thing. this is about 150 TIMES i have said this. HOW CAN I MAKE IT MORE CLEAR? AND DESCRIPTIVE THEN THAt? :compbash:

Your questions have been answered! No one has ever had a problem with the DG being so nose heavy that you're unable to get into orbit with it. Physics dictate once the air gets too thin for the control surfaces to work, then you must use RSC thrusters to hold the nose up, controlling the pitch.

If there was something wrong with the simulation in this regard, then don't you think the other 99% of us (some who have been playing Orbiter for YEARS) would have noticed it and fixed it by now??

 

[rocketdued]

well theres not a free way to make a video so thats out. don't make me say that again. now the manual says to rotate @100kmh so i do step 2 is turning right to 140 opn the hearding. i do. step 3 pitch up to 70 degrees nose up pitch. ok i got that part. but then at 1,600 kelomiters every thing goes south from there. the flight path indicator drops to negative 10 degrees. and the next thing i see is my space craft buringup. because for somereason it's skipping of the atmosphere like a stone. it does this twice then gets a huge egg shaped orbit thats no where near what i need.