@jag9998 Neither, it has no film cooling at all and it's a common aluminum alloy selected for cheapness and machinability, not any special conductivity. It's just that a relatively low pressure engine has rather easier cooling requirements in terms of maximum heat flux per area, though the total area is larger.
Do you use film cooling to keep the engine from oxidizing, or do you just use a special alloy (or both)?
jag9998 6 months ago
@jag9998 Neither, it has no film cooling at all and it's a common aluminum alloy selected for cheapness and machinability, not any special conductivity. It's just that a relatively low pressure engine has rather easier cooling requirements in terms of maximum heat flux per area, though the total area is larger.
bbrockert 6 months ago
great one! do you have plans of these to rebuild it or are they a secret? :)
RobertR2007 2 years ago
I'm surprised aluminum is able to withstand the temperature without melting. I'm sure it's regeneratively cooled, but what is the propellant?
lithiumdeuteride 2 years ago
The fuel is isopropyl alcohol.
bbrockert 2 years ago