2025年1月6日 · On a 4-engine aircraft, the #1 is the port outboard, #2 is the port inboard, #3 is the starboard inboard, and #4 is the starboard outboard engine. On an 8-engine aircraft, #1 would still be the outboard engine on the left wing, #2 would be next to (inboard of) it, #3 inboard of #2, #4 would be closest to the fuselage on the left wing, and so on ...

2018年4月19日 · Once the number three engine was started it helped pressurize the pressure manifold for assisting the additional engine starts. Remember, a low start pressure could result in a hot start. Secondly, hydraulic pumps were located on the inboards #2 & #3 engines on the DC-4, DC-6, DC-7 & DC-8 as well as the B-707 (the B-747 had hydraulic pumps on ...

2016年7月4日 · Overhauled engines retain their operating history, and should have a complete set of logbooks since the day the engine was manufactured. Even if the only part that gets reused is the engine case an overhaul is still "the same engine" in the FAA's eyes, so make sure you can trace the full operating history of that engine.

2015年5月13日 · It's dependent on the aircraft and engine installations but these refer to the rotation speeds of the engine spools. As listed above, usually the N1 refers to the spool which the fan and LPC/LPT are on and N2 is the HPC/HPT spool in the gas core. The displayed values for N2 and N1 are often given as percentages of their maximum rotational speed.

2014年8月13日 · This means one could start either engine first today. Yet, it is still common to start the right engine first, e.g. the Boeing 737 FCOM, Normal Procedures, Engine Start Procedure says: Normal starting sequence is 2, 1. So why do we still care? In part, due to tradition. But there are some reasons to start the right engine first:

2017年1月9日 · The brake accumulator must be pressurized, this can be done by running the an electric pump without starting an engine.. Engines are numbered 1 for left, 2 for right on twin-engined aircraft and from left to right (1/2 and then 3/4) for four-engined aircraft. From this document: Which Engine to Use? A320 Family: ENG 1 A330: ENG 1

2024年12月10日 · The turbojet engine is already selected, and I want to calculate how big the air intake will need to be for this engine. I have read that the size depends on the mass flow rate, Mach number of the flow and design Mach number of the engine, and the intake size is such that the flow speed can be reduced accordingly.

Matching the engine and the propeller requires a gearbox so that they both work at their optimal rpm. Reducing the rpm with the gearbox also converts some engine velocity into additional propeller torque. We have basically the same problem with a piston car.

2019年10月27日 · The system A engine–driven pump is powered by the No. 1 engine and the system B engine–driven pump is powered by the No. 2 engine. An engine–driven hydraulic pump supplies approximately 4 times the fluid volume of the related electric motor–driven hydraulic pump. The braking is provided by both systems.

2024年6月21日 · 1 An APU (Auxiliary Power Unit) is a small engine which sits in the rear of the 737-800 which can provide electrical power and compressed air for cabin air conditioning and engine starting. This is typically a Allied Signal 131-9(B) for the Boeing 737-NG