Editing Sarich orbital engine (section)

== Technical problems ==
The orbital engine has two of fundamental design issues, which also plague the Wankel engine:

# Large surface to volume ratio combustion chamber which leads to larger combustion chamber heat losses and so loss of power, which can be greatly reduced using [[Stratified charge engine|stratified combustion]];
# Long sealing paths and multiple corner seals which mean it is harder to contain the chamber gases and so there is some loss of pressure and thus power.