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  2. Critical engine - Wikipedia

    en.wikipedia.org/wiki/Critical_engine

    The critical engine of a multi-engine fixed-wing aircraft is the engine that, in the event of failure, would most adversely affect the performance or handling abilities of an aircraft. On propeller aircraft, there is a difference in the remaining yawing moments after failure of the left or the right (outboard) engine when all propellers rotate ...

  3. Piper PA-34 Seneca - Wikipedia

    en.wikipedia.org/wiki/Piper_PA-34_Seneca

    The righthand engine is a Lycoming LIO-360-C1E6 engine variant, the "L" in its designation indicating that the crankshaft turns in the opposite direction, giving the Seneca counter-rotating engines. The counter-rotating engines eliminate the critical engine limitations of other light twins and make the aircraft more controllable in the event of ...

  4. Category:Aircraft engines - Wikipedia

    en.wikipedia.org/wiki/Category:Aircraft_engines

    Critical engine; D. Ducted fan; Duesenberg 16-valve straight-4 aero engine; E. Engine pressure ratio; Exoskeletal engine; F. Flat rated; Ford Model A engine; Free ...

  5. P-factor - Wikipedia

    en.wikipedia.org/wiki/P-factor

    P-Factor therefore determines which engine is critical engine. [6] For most aircraft (which have clockwise rotating propellers), the left engine is the critical engine. For aircraft with counter-rotating propellers (i.e. not rotating in the same direction) the P-factor moments are equal and both engines are considered equally critical. Fig. 1.

  6. Engine balance - Wikipedia

    en.wikipedia.org/wiki/Engine_balance

    Engine balance refers to how the inertial forces produced by moving parts in an internal combustion engine or steam engine are neutralised with counterweights and balance shafts, to prevent unpleasant and potentially damaging vibration. The strongest inertial forces occur at crankshaft speed (first-order forces) and balance is mandatory, while ...

  7. Failure mode, effects, and criticality analysis - Wikipedia

    en.wikipedia.org/wiki/Failure_Mode,_Effects,_and...

    Failure mode effects and criticality analysis (FMECA) is an extension of failure mode and effects analysis (FMEA).. FMEA is a bottom-up, inductive analytical method which may be performed at either the functional or piece-part level.

  8. Aerojet Rocketdyne AR1 - Wikipedia

    en.wikipedia.org/wiki/Aerojet_Rocketdyne_AR1

    The engine was conceived in 2014, and received US government funding to build a prototype engine in 2016. [2] By 2018, the USAF had committed US$295 million of government funding to develop the engine and build an initial engine prototype, while Aerojet will put US$86 million of private capital into the project through the prototype build. [ 3 ]

  9. Wikipedia:List of free online resources - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:List_of_free...

    Inclusion on the list doesn't automatically mean the absolute truth is on these websites, so always be critical and compare information between different sources. The content of the subsections is alphabetically organized. Please add free online sources if you know some that are missing in this list, but try to keep it relevant and trustworthy.