# danilon62

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And the prediction for tomorrow is... SCORCHIO!

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1. ## The Unofficial Kerbal Space Program Forum Steam Group

Yes, it's great in here. It's been 4 years now be we all still talk almost daily there. Whoever wants to join is welcome to do so. Lajos posted an invitation link a couple posts above!
2. ## Specific internal energy and enthalpy

Maybe it has something to do with dymensional analysis, I'm strugling really hard with this problem.
3. ## Specific internal energy and enthalpy

I'm trying to figure out the following problem: I've got a pressurized enclosed volume where the only data I have is pressure (350KPa) and temperature (30ºC), I'm asuming that everything remains constant (That is volume, temperature, pressure etc.) and that it's filled with an ideal gas. The point of the exercise is to find out the specific internal energy of the volume, which in the SI is measured in Joules / Kilogram, thing is, I don't need it to be in SI units. And thanks to that, I developed an approach: The average kinetic energy of a particle can be calculated using the formula kE = (3/2)* k * T where k is Boltzmann's constant (1.38*(10^-23)J/K) and T is temperature in Kelvin (303K in this case). So, filling up the equation renders us this result: Average kinetic energy per particle = 6.2721*(10^-21)J The internal energy is the sum of the heat ( kinetic energy of the particles) + the pressure potential energy (Which is Pressure times Volume). I don't know the volume which is holding me down from calculating the internal energy, any insight on how to calculate the pressure energy per particle or any other method would be appreciated. Kind regads,

5. ## The Unofficial Kerbal Space Program Forum Steam Group

Well that's weird, are you VAC banned or something?

7. ## The Unofficial Kerbal Space Program Forum Steam Group

Invites sent!

10. ## Drag-reducing aerospikes and the nature of stock aerodynamics

A drag-reducing aerospike is a device (see Nose cone design) used to reduce the forebody pressure aerodynamic drag of blunt bodies at supersonic speeds. The aerospike creates a detached shock ahead of the body. Between the shock and the forebody a zone of recirculating flow occurs which acts like a more streamlined forebody profile, reducing the drag. Does the game take advantage of such things? I don't really understand how KSP aerodynamics work, but it should benefit from these kind of gadgets if it modeled airflow realistically, especially in mods like RSS where the atmosphere part of ascent is quite long.