Apperently we now need heat shields to leave the atmosphere

[Stupendous Man]

I've just tried to launch a Stayputnik several times in career mode, and every launch it explodes due to overheating before leaving the atmosphere. This happens between 25.000 and 35.000 meters at speeds above 700m/s. I've tried making an extremely late gravity turn and not accelerate until I'm very high, but the rocket still explodes!

Has anyone been able to launch a Stayputnik without fairings? Am I doing something very wrong during my launch? The Stayputnik has a max temperature of 1800 degrees, just slightly less than the Mk1 cockpit and 600 degrees less than the entry capsule.

[Patriot03]

I have the same problem, sometimes my MK1 cockpit actually pops. I've lost 2 kerbals on a launch.

I love the new system but someone has to tell me what I'm doing wrong.

[Syd Khaos]

Put things like that in fairings....

Your acelerating to fast while still to low (or maybe mod conflics...hard to say with info provided).
The heat is manageable.....but you cant fly like you used to and expect things to work out.
Also in new aero model your really hurting yourself turning late...G-turn should start no later than 3Km not.....most rockets actually a bit sooner.

[Stupendous Man]

I usually start a slight turn at a few thousand metres altitude, but with the overheating of the Stayputnik this is impossible. And I can't put it in fairings as I haven't unlocked them yet... So at this point I guess the Stayputnik is essentially worthless this early in the tech tree.

I do however have a few mods installed, I'll try and remove them as see if anything changes.

[Stupendous Man]

I can confirm that the mods do not cause this behavior.

This is the monstrosity I'm trying to launch: http://steamcommunity.com/sharedfiles/filedetails/?id=434252417

And this is what happens: http://steamcommunity.com/sharedfiles/filedetails/?id=434252492

[Syd Khaos]

1300m/s at 36Km....no wonder you explode....dude, WAY to fast WAY to low....
Everything in 1.0 needs to me much slower and more gentle over all.

[Ozone]

It's a normal and realistic behaviour. The higher you get, the less air and the faster you can move. But the less air, the less you can evacuate the heat generated by your fast movement.

So, basically, the higher you go, the hotter you get. If you reach the melting point, then you're gone.

Don't go too fast while in the lower athmosphere. You should never see flames, or just a hint of flames at most. Above 15km, the temperature of your ship will start to rise but won't evacuate as fast as you would like.

[Syd Khaos]

RoverDude mentioned somehting about radiators in stock at some point...not sure if it will happen...
Im working on set of radiators right now...but wont be posted till tommorow sometime..

[Stupendous Man]

The thing is, I never saw any flames and so assumed the atmosphere was thin enough at this altitude to allow higher speeds.
I was finally able to get into orbit just now, it seems the 'magic' point is between 35.000 and 45.000 meters, since I was able to maintain higher speeds and 45.000 meters alt.

[Ozone]

I've had rocket exploding at 55km but I was going very fast and my ship was already very hot from the ascension. I found this theorized temperature curve by altitude :

http://i.imgur.com/tpkCQ.png

On the curve we see the most dangerous point is between 15 and 35km.

[Stupendous Man]

Publicado originalmente por OzoneGrif:

I've had rocket exploding at 55km but I was going very fast and my ship was already very hot from the ascension. I found this theorized temperature curve by altitude :

http://i.imgur.com/tpkCQ.png

On the curve we see the most dangerous point is between 15 and 35km.

Interesting, thanks!

[FiddyTrickPony]

Kerbal Engineer is so handy for this - watch your thrust to weight ratio on takeoff until out of the atmosphere and keep your thrust to weight ratio in a good zone. (Haven't tested with 1.0 yet, but I'm guessing in the ballpark of 1.6 thrust to weight ratio on takeoff and maybe up to 2.5 near the end of your stages.)

That way you'll stay efficient and won't overheat.

[J-Curwen]

Probe bodies are so fragile. I had one in a cargo bay, two parts next to the nuclear engine. And it exploded due to the heat the nuclear engine made on a transfer burn to mun. The engine made half my ship glowing red though. They clearly nerved the lv-n, its not my first choice anymore. And fragile equipment like probe bodies or solar panels need some protection.

[Jaz]

Control your throttle and you shouldn't have a problem with overheating during launch. I like to keep my G's just to the top (or barely above) the green and as I get into higher altitudes I have to adjust the throttle up or down depending on my TWR at the time. Keeping an eye on your speed and total G's might help, I found it did for me.

[Stupendous Man]

I just rewatched Scott Manley's video on launches in 1.0. If you follow his advice you run into the exact problem I initially described.
I still believe the Stayputnik is oversensitive. Especially since I get absolutely no indication that the rocket is overheating in the upper atmosphere.

[Black_Rat]

scotts advice is good, the thing is if your ship is constructed with too much Thrust to Weight you can accellerate faster then the ship can handle, which causes you to overheat.