* Low Specific Impulse: Petrol has a relatively low specific impulse (Isp), which is a measure of engine efficiency. This means it doesn't produce as much thrust per unit of fuel consumed compared to other rocket fuels like kerosene, liquid hydrogen, or solid propellants.
* High Vapor Pressure: Petrol is highly volatile and has a high vapor pressure. This makes it difficult to store and handle safely, especially in the high-pressure environment of a rocket engine.
* Limited Energy Density: Petrol has a lower energy density than other rocket fuels. This means you need to carry more fuel for the same amount of thrust, increasing the overall weight and complexity of the rocket.
* Incomplete Combustion: Petrol burns with a sooty flame, indicating incomplete combustion. This reduces efficiency and can lead to nozzle clogging.
In contrast, kerosene (RP-1) is a much more suitable fuel for rocket engines. It has:
* Higher Specific Impulse: Kerosene offers higher Isp, resulting in more thrust per unit of fuel.
* Lower Vapor Pressure: Kerosene is less volatile and easier to handle, making it safer for rocket applications.
* Higher Energy Density: Kerosene has a higher energy density, allowing for more thrust with less fuel weight.
* Cleaner Combustion: Kerosene burns cleaner than petrol, producing less soot and improving engine efficiency.
Therefore, while petrol can be used in a rocket engine, it's not the ideal choice due to its low performance and handling challenges. Kerosene and other specialized rocket fuels are much more practical and efficient options.
