Engine Pre-cooler

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Engine Pre-cooler
Part image
Air intake by
C7 Aerospace Division

Radial size Small
Cost (total) 1 650.00 Funds
(dry) 1 618.00 Funds
Mass (total) 0.38 t
(dry) 0.18 t
Drag 0.2-0.3
Max. Temp. 2000 K
Volume  ?
Impact Tolerance 10 m/s
Research Hypersonic flight.png Hypersonic Flight
Unlock cost 6 200 Funds
Since version 0.15.0
Part configuration engineBodyRadial.cfg
Air intake
Intake speed 30
Intake area 0.5 m2
Maximum intake air 0.5 Air unit
Liquid fuel tank
Liquid fuel 40 Units of fuel

The Engine Pre-cooler is a combination of an air intake and a small liquid fuel tank. It is the most efficient inline supersonic intake offering markedly better performance than the Mk1 Diverterless Supersonic Intake at mach speeds higher than ~3.

The precooler is in principle a slightly better heat conductor than other (non-radiator) parts with double the heatConductivity and it also has superior heat emission which allows it to act as a passive radiator and wick away heat more effectively, this effect is not limited to engines nor to atmospheric use. However in practice it is very difficult to observe any actual benefit from these thermal characteristics and as it is also more effective at absorbing heat from the environment it may actually make overheating worse when the heat source is external (i.e. from re-entry) rather than internal.

Prior to 0.24 it was purely cosmetic but could be easily mistaken for an air intake. This part was originally developed for the C7 Spaceplane pack, and has become a stock part since 0.15.0 and the introduction of the Spaceplane Hangar.

Product description

Advanced materials allow this cooler to wick away the heat from attached engines. In addition, it features additional intake area optimized for supersonic flight and powerful static suction.

C7 Aerospace Division


  • Changed description
  • Increased dry mass from 0.15t to 0.175t
  • Impact tolerance halved from 20 to 10m/s
  • Added fuel tank with 40 units of liquid fuel
  • Added air intake
  • Adjusted dry mass (from 0.3 to 0.15) and costs (from 550 to 1650)
  • Initial stock release
the previous model: Radial engine body