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problem with spaceplane urgent

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imcute

imcute

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Just now, James Kerman said:

Is this not in meters per second?

hmm?(although i could not read imgur messages)

maybe the tested 3400m/s is for rockets?

okay although i have not exhausted all fuel,i got 1000m/s at 10000m even with 2 major up-manuvers(to avoid fire on wings)

and wings are still on fire

27000.1100m/s.

I start to eat up oxidizer

fiery wings already exhausted extinguisher supply on plane

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James Kerman

James Kerman

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Just now, imcute said:

maybe the tested 3400m/s is for rockets?

Minimal orbital speed for Kerbin is 2279m/s. 3400m/s is roughly the required DV to get to orbit but I think you'll need a little more to account for drag. I think you are really close to making orbit.

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imcute

imcute

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50000m.2200m/s.

Stopping to be on fire,the plane tumbles a bit due to lack of reaction wheels,and the apoasis is 150km

Just now, James Kerman said:

inimal orbital speed for Kerbin is 2279m/s

oh!

65000m.2150m/s.

Plane cannot stop tumbling on roll(non-fatal to prograde manuvers)

50m/s speed reduction due to drag(forgot to say,engine stopping manually due to too-many-apoasis at last checkpoint)

70000m.2130m/s.

Is going to space.

Smol speed reduction due to gravity

Will attempt to warp to apoasis.

130339m.1920m/s.

Apoasis,ready for burn.

Non physical time warp stops tumbling.

Minor speed reduction due to gravity.

797 lf and 315 ox.

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James Kerman

James Kerman

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Posted (edited)
5 minutes ago, imcute said:

Stopping to be on fire,the plane tumbles a bit due to lack of reaction wheels,and the apoasis is 150km

Try stopping the engines when you get an apoapsis of between 75-80km  and then use your final propellant to burn there (just before apoapsis).

Edited by James Kerman
More info
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imcute

imcute

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130952m.2195.2m/s.

Orbit.

655 lf and 141 ox left.

Thrust gimbals help correct direction to prograde.

Just now, James Kerman said:

between 75-80km

whoops

Just now, James Kerman said:

More info

yes ik that u should do orbit burn at apoasis

Final orbit:136271m and 121884m.

Great

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imcute

imcute

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Just now, James Kerman said:

:happy:

:D

:D

:D

:D

okay should i try to put nervas on it and to use less or no oxidizer?(closed cycle mode has bad isp and causes too much lf or ox that cannot burn off)

2 minutes ago, James Kerman said:

Now it's time to try descent!

okay(did not see this before ctrl plus r)

aww man electricy goes zero

nvm ill open inf power cheet

50000m.2200m/s.

Tumbling due to fins not working good on high atmos.

Let there be fire drag.

40000.2000m/s.

On fire.

30000m.1300m/s.

Aerobraking success.Still on fire :D

Omniously still tumbling.

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James Kerman

James Kerman

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1 minute ago, imcute said:

okay should i try to put nervas on it and to use less or no oxidizer?(closed cycle mode has bad isp and causes too much lf or ox that cannot burn off)

All design choices are trade offs and spaceplanes have a higher dry mass than conventional rockets because you're carrying a lot of extra stuff that is only useful in atmosphere. You will need to experiment to find a good balance for whatever your mission is.

Another option is to add a docking port and refuel the spaceplane in orbit because 3400DV can get you to lots of places in the kerbol system.

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imcute

imcute

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10000m.60m/s.

Trying to startup gimballing engines for better controll.

Just now, James Kerman said:

Did you land it?

not yet

8000m.40m/s.

Cannot stop craft from retrograding which is only good for rocket landings

5600m,30m/s.

Tumble

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James Kerman

James Kerman

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5 minutes ago, imcute said:

Cannot stop craft from retrograding which is only good for rocket landings

It's okay, I think the plane is just stalling (I don't think it would want to stay airborne at 8000m and 40m/s). Once you get under 10000m or so, push the nose down to gain speed and keep airborne (if you have no liquid fuel left) and look for a flat surface to land. If you can keep the speed up it should be controllable.

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imcute

imcute

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846m,10m/s

Crash

Fortunatly only a small part of parts are destroyed due to the rilly small terminal velocity due to fat wings and mk2 fuel tanks

Unfortunatly the only part thats destroyed on impact is the probe core(then the parts in front of the probe core fall down and crash)

Just now, James Kerman said:

Once you get under 10000m or so, push the nose down to gain speed

cant!thats what i say uncontrollable

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James Kerman

James Kerman

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Just now, imcute said:

Unfortunatly the only part thats destroyed on impact is the probe core(then the parts in front of the probe core fall down and crash)

Great success! I consider any spaceplane that does not kill kerbals successful! :grin:

I think you will be a great pilot once you get some more experience.

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imcute

imcute

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Just now, James Kerman said:

What is your next goal for the spaceplane?

to not leave so little fuel for orbit manuvers

 

36 minutes ago, imcute said:

130952m.2195.2m/s.

Orbit.

655 lf and 141 ox left.

Thrust gimbals help correct direction to prograde.

 

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James Kerman

James Kerman

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You have many options, you can build it bigger and add crew capability while keeping a probe core in control and I think you can solve some of the stability issues if you add a reaction wheel. I mostly play career mode so the main use I have for spaceplanes is for crew transfers to and from my space station in Kerbin orbit because it saves funds compared to a 2 stage rocket.

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imcute

imcute

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Just now, James Kerman said:

You have many options

okay my current plan is to make it smaller and better instead of this stiff dopey uncontrollable heavy lump of wings

craft built,gonna test

860m,370m/s.

2 rapiers for a small craft make this craft going brrrrr

10000m,930m/s.

On fire,have to use a pitch of 60 to make it ascent fast enough

35000,1250m/s.

Apoasis at 80km.Halting engine.

well i havent used even a bit of oxidizer!

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imcute

imcute

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Just now, James Kerman said:

manoeuvre mode button

okay

78683m,1115m/s.

Apoasis.Burn.

whoops bad orbit burn

need relaunch

Orbit!

324880(due to too much twr causing orbit burn not very precise) 80001

25 oxidizer left!Whoops

Now try decent

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imcute

imcute

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Awsome control!

:D

 

aerobraking...

gotta land on sea...

a hard landing would destroy all the parts and there is nowhere to break on!oh no!

thus im trying to fly over this sea

cruising at exactly 13618m with no vertical velocity...

okay flown over that damn sea

attempting a soft landing...

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