Saving the SC-9001 Science Jr. from heat

[KingPhantom]

Is there another way to save the SC-9001 Science Jr. from the heat during ascending execpt using service bays?

i use the science part as an element of my lander and the design doesn't allow to use service bays...

85% of my rockets explodes during ascending because of the SC-9001 Science Jr. that only accept 1200°...

Edited May 3, 2015 by KingPhantom

[T-Bouw]

It sounds like you're ascending too fast.

The high speed causes friction which in turn causes heat.

Tune the throttle a little lower until the flames disappear.

[KingPhantom]

it explodes also when i try it with mechjeb and limited throttle to 80, 75 or 50... with 50 i'm not able to make the orbit.

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the protective shell doesn't prevent heat, correct?

[T-Bouw]

The fairing should protect from heat as well (stated in the wiki) though I haven't confirmed this myself yet.

Are you firing an engine directly underneath the Science Jr.? Heat in KSP is also known to conduct to other parts.

[Wanderfound]

As others are saying, the problem is most likely a too-rapid ascent. You want a launch TWR of around 1.5 or so.

OTOH, there could be some heat conduction issue. F11 to get the heat overlay in flight, F10 to get the progress bars (but be aware that the F10 thingie is currently causing a memory leak, so may induce computer crashes).

Screenshot of the rocket, and some speed/altitude details of when it's exploding?

[KingPhantom]

http://www.omfg.ch/ksp/screenshot344.png

http://www.omfg.ch/ksp/screenshot345.png

http://www.omfg.ch/ksp/screenshot346.png

flying at 260m/s.... below 300...

exactly the same with the 2nd version of the rocket with a fairing shield.

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i think i got it. the rocket is not laying propertly in prograde. that could heat it up more

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i need more boosters

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the seperators are heating up the tank and decoupler under the science part. they can take the heat but not the science jr. when the heat flows. thats the problem. i have to rethink the seperators.

[Merandix]

I think it's because of that gap. Aerodynamics are actually important. The side of your rocket must be as smooth as possible.

The problem is that you have a small part (the stack separator) that is in the airflow, and a small heat sensitive component next to it.

Though, admittedly, I've also had some components mysteriously overheat while going quite 'slow'. The thing is, it's always stuff sticking out into the airflow, or around a gap in an otherwise smooth surface.

[TheXRuler]

Glad you fixed it, change it to "Answered" maybe?

[Poofer]

Heat also transfers via conduction, meaning the heat from your rockets/parts that heat due to smashing into the air also go to the rest of the ship.

things you can do to prevent send heat where you want it.

- don't attach service bays near science jrs. they act as insulators and won't let the science jr send heat away

- attach solar panels on the science jr. they act as great radiators

- attach service bay at the bottom of the ship, this will insulate the rocket heat from the rest of the ship.