Jets and Rocketry

[EpicToaster1]

Liquid Propulsion

Factory Requirements:
500 Construction Factories

Using a mixture of fuel and oxidizer, we could try to create a purely liquid engine.

Research Time after Factory Requirement [in IRL time]:
≥20 - Instantly
16-19 - 0.5 Week
12-15 - 1 Week
9-11 - 1.5 Weeks
5-8 - 2 Weeks
2-4 - 2.5 Weeks
1 - 3 Weeks
≤0 - +50 Factories, reroll at end of week

IRL, the first rocket motor was designed by Dr. Robert H. Goddard from Auburn, Massachusetts in 1926 using a mixture of gasoline and liquid oxygen. It flew for 2.5 seconds, rose 41 ft into the air, and crashed into a cabbage field. His research would see some expansion with the idea of the turbojet in 1928, however wouldn't see any further use until the 1930s and 40s under Nazi Germany's VfR group headed by Werner von Braun.

[EpicToaster1]

Turbojet

Factory Requirements:
250 Construction Factories

Ignoring the need for a liquefied oxidizer, we can bring in air while moving, compress it, heat it, drive our engines, and throw away the air really fast to propel our aircraft.

Research Time after Factory Requirement [in IRL time]:
≥20 - Instantly
16-19 - 0.5 Week
12-15 - 1 Week
9-11 - 1.5 Weeks
5-8 - 2 Weeks
2-4 - 2.5 Weeks
1 - 3 Weeks
≤0 - +50 Factories, reroll at end of week

IRL, the first Turbojet was made by Frank Whittle in the United Kingdom in 1928. The engine wasn't developed for practical use until the late 1930s. The engine is highly inefficient at low speeds as it attempts to heat up and expel air at supersonic speeds.

[EpicToaster1]

Turboprop

Factory Requirements:
150 Construction Factories

If we take all the parts and put it outside, similar to our conventional propeller aircraft, we can save money while making them run faster and more efficiently.

Research Time after Factory Requirement [in IRL time]:
≥20 - Instantly
16-19 - 0.5 Week
12-15 - 1 Week
9-11 - 1.5 Weeks
5-8 - 2 Weeks
2-4 - 2.5 Weeks
1 - 3 Weeks
≤0 - +50 Factories, reroll at end of week

IRL, the first Turboprop was made by Hungarian mechanical engineer György Jendrassik in 1928 and filed for patent in 1929. The engine wasn't developed for practical use until 1942 due to war efforts not allowing for a proper budget. The engine is highly efficient at low speeds. None of the engine's exhaust contributes enough to the thrust, instead relying solely on the propeller.