Questions tagged [engine]
For general questions related to aircraft engines; use a more specific tag, such as [jet-engine] or [piston-engine], if possible.
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Minimum HP for ultralight
What is the minimum HP needed to fly a 200 pound ultralight? I’m looking at a 6.5 HP, 3600 RPM Predator engine, but is that enough?
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If you could put multiple smaller ejector pumps in the same space, would it work better than one larger ejector pump?
I saw somewhere how, for Dyson bladeless fan systems to work for hovering, you'd need an entire grate of ejectors rather than a single ring. However, if you had five ejectors in the same space, each a ...
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PA28 Archer 2 Circa 1986 - Noisy Engine
100 hours ago, a group-owned PA28 Archer II Circa 1986, 180hp plane had its engine rebuilt after 2500 hours. There had been no problems with the aircraft during the 2500 hours.
Since the rebuild, the ...
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How is a turboprop engine mounted to the wing?
For a given turboprop plane such as the ATR-72, there doesn't seem to be a pylon as on turbofan driven planes. This question: How are engines mounted onto wings? has answers that detail how a pylon is ...
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Is it possible to identify plane engines by sound alone?
Can airplane engines be differentiated and identified by what noises they make? If so, what does each engine sound like? How would you be able to tell between a low-bypass and high-bypass turbofan? ...
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777-300ER venting something from left engine outboard side - what is it?
Crossposting from Metabunk with permission from the thread opener marko.posavec.
Their photo shows British Airways Boeing 777-300ER G-STBF in flight with something producing a contrail or the like ...
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Why some airliners have autostart and others don't?
So some of the more modern FADEC equiped planes (specifically airliners like the 787) have autostart and will self monitor the engines during startup. The one thing that confused me was how a 747 ...
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Need help identifying a radial aircraft engine
I work at the Naval Air Station Wildwood Aviation Museum in Rio Grande NJ. We just acquired what we believe to be a radial aircraft engine that was found by fisherman in the Atlantic Ocean. We'd ...
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Actual non-axial airflow (sideslip) for a propeller driven aircraft
I am making a propeller model for a two-engine propeller driven aircraft (like a Dornier 228). I have expanded my model to include the non-axial airflow as well. $$ $$
By non axial airflow, I mean ...
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Authorization of repairing engine blade nicks
Since blade nicks repair considered as a major repair, I would like to ask,
1- Who is authorized to repair engine blade nicks?
2- Could a mechanic with powerplant rating do the repair?
3- Could a ...
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twist correction of fan blades
How can the blade's angle be effectively adjusted to meet prescribed tolerances during shop repairs?
I am conducting a research paper on aircraft engine blade maintenance, and I have encountered ...
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Is diying a strong jet engine possible wih basic tools
Is it possible to manufacture a jet engine that provides 500 newtons of thrust with relatively primitive tools like a lathe or so , if someone did something similar can you provide me with the ...
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Why are hydraulic pumps mounted on engines 2 and 3 in BAe 146?
The BAe 146 has 4 engines:
engine no. 1 and 4 generate electricity
engine no. 2 and 3 generate hydraulic pressure
Why was this setup chosen?
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How to calculate sfc per throttle setting of an turbofan engine?
I was looking for sfc per throttle setting of an engine. I was not getting the performance data of that engine. So is there any way to calculate it by formula?
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Would the combustion chambers of a turbine engine generate any thrust by itself? [duplicate]
Well, I know that the combustion chambers drive the compressors, and the reaction occurs, and all that stuff.
But let's imagine that somehow someone is converting a turbine engine (turbojet, turboprop,...
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Why use a RAT when engines can windmill?
When a dual engine flame-out is encountered, and the engines themselves are not damaged such as in the case of Air Transat Flight 236, why is the RAT deployed for emergency power instead of using the ...
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Do we use static pressure in thermodynamic cycles like brayton instead of total pressure?
I observed that pressure plotted in the graph above increases from 0 to 1.
0 is inlet entrance and 0' (not shown in the graph) somewhere between 0 and 1 is compressor entrance.
Now, we know that at ...
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Where exactly is the engine compartment, remarked in yellow?
Where exactly is the engine compartment, remarked in yellow? We know that normally the air going to the engine passes through the air filter. But when we open the alternate air valve, where does the ...
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Can an aircraft use ram air to generate power while flying?
I am a student carrying out a project focused on efficiency on aircraft. I have arrived at an idea I believe to be feasible. I am looking for suggestions, specification of what I would need, and any ...
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Buzz-saw noise from big turbofans at high thrust
This topic has been addressed many times on this and other forums. I have seen (and often not fully understood) some deep technical analyses, incuding manufacturers' research labs, since this is a ...
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Why does true airspeed decrease with altitude?
I was having a discussion with a friend who's going for a record speed over distance attempt. We were discussing which altitude will have the fastest TAS, and I suggested it would be the highest ...
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Does a 120cc engine burn 120cc of fuel a minute?
I have heard that a 120cc engine burns 120cc or 120ml of fuel per minute. Is this true?
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Would the dle 55ra engine be enough to power my paramotor(ducted fan)?
I plan on using the dle 55ra engine to produce 5hp at 8,500 rpm. I am using it in a paramotor, and to save space I am considering using a ducted propeller similar to the Fulcrum power pod. The duct ...
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Why does airspeed increase with more throttle if RPM stays the same?
Given a constant speed propeller, the RPM will stay the same because of the governing system which changes the blade angle. But in cruise flight if you add more power and keep the RPM's the same, ...
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How do Pistons vs. Turbines fare during a Carrington event?
Electromagnetic pulses are a staple in sci-fi, and they're basically the writers' hand-waving of "deletes technology" weapons. This question asks about whether or not GA motors would ...
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What airfoil family does turbofan's fan blades use?
The thing is, I am trying to make turbofan blades in Solidworks for a possible undergraduate thesis.
I want to know if there is any airfoil from the NACA series or any airfoil families plausible for ...
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What is the amount of bleed air required for de-icing? What is the power impact of this bleed air?
I was wondering if anybody has any rough equations/figures that answer the following questions.
What is the mass/flow rate of bleed air required for de-icing based on temperature of the air intake?
...
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Why is the forward fairing of the pylon very shiny and metallic in appearance in A350?
One can notice the forward fairing of pylon is very shiny and metallic. This is quite unique and I do not find it in other aircraft. Why is this?
Does it serve any specific aerodynamic purpose or does ...
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What is the aerodynamic influence of prop spacing and placement in multi-prop engine setups
I saw this question Is there a rule of thumb for spacing between jet engines?, which referred to How do you choose engine placement for under wings engines?, but I was wondering how the engine spacing ...
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Why are spins not allowed below 10k ft msl in the T6b?
Reading through the manual I see that spins are not allowed below 10000 msl in this turboprop aircraft, the t6b, the reason that is written in the manual is as follows, quote:
"Spins below 10k ...
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Accidentally turned off the engine before setting mixture to idle [duplicate]
After landing, while running through my checklist to secure the aircraft, i accidentally turned off the engine before setting mixture to idle cut-off. My flight instructor was prompt to react. I ...
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Airspeed and RPM relationship with different attitudes
How can I figure out what airspeed goes with what rpm? I cannot find it in the POH.
I read that for cruising attitude on a Cessna 152, we should aim for 2200 rpm. My plane is a PA-28-151.
I am asking ...
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Could a F-22's exhaust stall a highjacked Boeing 767's turbofan(s) and force it to land?
Would it be possible to use a F-22's exhaust to intentionally stall a hijacked Boeing 767's turbofan engines in order to force it to land instead of shooting it down?
The idea being that stalling one ...
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Can you put a propeller on the back of a plane, and have it go forward?
So, I was thinking about how drones work, and I can't figure out how drones with propellers at the rear of the drone can still go forward. I'm not that experienced in aviation so if this is a basic ...
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What is "FAR power"?
The article "Boeing’s MCAS on the 737 Max may not have been needed at all" (The Air Current, January 10, 2021) quotes a Boeing e-mail about the 737 MAX that says (emphasis mine),
I can't ...
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Safran 2S2 Engine Overhaul
Does overhaul of Safran 2S2 Engine reset all engine inspections? If engine TSO is 0 as of today, does it mean I can reset all 15/20/30/300/600/3000/3500 hours inspection to be 0?
Or I have to see Shop ...
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ENGINE OIL SYSTEM SERVICING IN A318/A319/A320/A321 - ENGINE IAE-V2500
12-13-79-610-011-A - Check Oil Level and Replenish.
Reason for the Job:
This task gives the instructions necessary to fill the engine oil tank
if the oil level has decreased during normal engine ...
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Why do pilots move the propeller lever full forward before landing?
Is it because aircraft can get more "instant" power for go-around, with throttle full-forward?
Or is it for protecting the aircraft's engine from high RPM, low PROP stress in case of go-...
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What happens if you change power setting with constant mixture setting?
For a given Cruise Setting: Manifold set / RPM set / Mixture set according to P.O.H. values: what happens to the Mixture if you were to reduce power or increase Power by varying throttle? Does a ...
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Propulsion/ power plant
Let’s say I require 100Hp as stated by my calculations of Thrust for an aircraft-
When finding a power plant for this, would it be better to use a power plant with more Hp or exactly that 100Hp please?...
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Why is China still heavily reliant on Russian turbofan engines?
According to Paul Schwartz, China is "still heavily reliant" on Russian turbofan engines:
Beijing is still heavily reliant on Russian aircraft engines, however, due to the great difficulty ...
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Is fuel atomized, vaporized or both in the venturi?
I understand that the venturi speeds up the flow of fuel and air which atomizes the fuel, but I don't see where vaporization happens. Atomization means the breakup of liquid into fine particles while ...
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Is a VW Beetle engine a good choice for a light two-seat aircraft build? [duplicate]
What do you think of an air cooled Volkswagen engine for building a light two-seat airplane?
This is probably the only engine I can get my hands on that needs no reduction gear and has enough HP. ...
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At what speed will the crankshaft be rotating if each cylinder of a four-stroke cycle engine is to be fired 200 times a minute?
Well the answer is 400rpm ; but I don't understand how.
Here's my thought process:
4 stroke engine would mean every piston is in a different stage (intake, compression, power, exhaust)
Which means 200 ...
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Does throttle equal power on a turbocharged piston engine?
On a normal piston engine powered airplane, throttle equals power. If I set the throttle to 50 %, I will get 50 % of the power the engine can develop at the current altitude, temperature, etc. In a ...
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Why do the replacements for craft like the C2 Greyhound and E2 Hawkeye still use turboprops?
These two airplanes are some of the classics in naval history, but replacements for them exist. When taking a look at them, they do have some improvements, but I still have one question. Why do they ...
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What is a ram recovery point?
As aircraft speed increases, thrust tends to decrease somewhat; as the aircraft speed reaches a certain point, ram recovery compensates for the losses caused by the increases in speed. The inlet must ...
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What makes an engine suitable for supersonic flight?
I would like to know for example if someone can take the "core" of an CFM56 used on A320, redesign it by adding a supersonic intake, a convergent-divergent nozzle, and reduce its bypass ...
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why do Lycoming piston engine aircraft operate at 75% best power? [closed]
What happens to the remaining 25%, is the remaining 25% lost due to friction?
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How aircraft manufacturer decide where to mount the engines on the wing?
How do aircraft designers decide how far from the fuselage should engines be? I am specifically talking about engines that are mounted on, in, or under the wing.
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