Questions tagged [engineering]
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Why in aviaton they are using Electro Mechanical Actuators instead of Electric Linear Motors?
In my opinion they are much more compact, the design may be needed to change in order to still be a fail-safe component, also, may be need to account for jamming and load disconnection safety devices, ...
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Did WW2 Bombers have shock-absorbed pilot seats?
I'm trying to figure out if the cockpit seats for WW2 bombers had any kind of shock-absorption, or were they fixed rigidly to the airframe?
This picture is from a B-24. There are clearly enough pivot ...
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Terminology for roller counter mechanism components
I have here a Doppler drift and groundspeed indicator - I believe from a Decca Type 72 Doppler radar installation. It uses a servo-driven needle to display drift angle, and a roller counter to display ...
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Aircraft spoilers (flight spoilers, GLD)
Wondering if anyone has any examples on how a spoiler affects the Cl and Cd of an airfoil.
For example, Xfoil has plenty of data on plain flaps up to 45 degrees deflection but nothing about spoilers. ...
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XFLR5 vs AVL vs DATCOM vs OpenVSP
I am working on a model airplane and am coputing some of the data using software.
I have already computed the general stuff using XFLR5 and AVL. My question is, is there any point for me to do the ...
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What is the additional planform area added to an A380 on take-off flaps setting (Flaps 1+F)
I would like to know how I can approximate the additional area added to wing on flaps 1+F:
Can someone use other dimensions they know of the A380 wing and approximate what this area would be, we can ...
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Pusher vs Pull prop [duplicate]
Probably a pretty simple question, but what exactly are the pros and cons of pull and push propellers, and is there a reason why pull propellers are a lot more prevalent in planes than pusher ones?
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Sensors used on a blade
How to measure the strain, temperature and rotational dynamics on a running engine fan blade? How can you do the experiment?
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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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How does an aileron actuator work considering the following?
My question is how does an aileron work considering it rotates around a fixed point and the actuator arm moves in a straight line. If what is shown in the first picture I have provided is true, then ...
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What does the Permanent Magnet Alternator do exactly and how works?
From T6b Naval manual:
A dedicated permanent magnet alternator (PMA), mounted on the reduction gearbox, powers the PMU. The PMA supplies 32 VAC, which the PMU converts to DC. The PMU automatically ...
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Why astronauts during launch fly faster than jets but experience less Gs? [closed]
The NASA Space Shuttle used to lunch astronauts into spaces at high speeds, supersonic speeds. When you google whats the Gs force they experienced while departing or simply “Gs forces astronauts” You ...
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Why is more angle of bank (AOB) at the best gliding speed giving less altitude loss?
Reading the manual for the T6b (turboprop aircraft single engine), it says different altitude losses during a 360 degree turn, holding 125 kts (the best glide for range speed), power is either dead, ...
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How can I choose an airfoil for inverted flight & high weight payload?
I have a project for university to design and build a model RC aircraft. Tt's main design principal is to carry a high payload, so I was thinking of going for a high camber, thick aerofoil. Hopefully ...
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RPM of wheels on touchdown
What is the average RPM of the wheels of commercial airplanes upon touchdown?
I understand there is variability that comes with different wheel sizes, approach speed, etc. Just thinking of the average ...
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What would be involved in disconnecting one set of controls in an aircraft?
Every aircraft I've seen has two sets of controls, even aircraft with only two seats. For any number of reasons - we'll go with "This pre-teen is super excited about aviation and wants to fly, ...
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How does control system design ensure correct elevator position with the steering system unlocked? [closed]
I’m having some trouble answering the following problem encountered in one of the worksheets for aviation students:
The plane shown in the picture stands on the runway. The pilot, while getting off, ...
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how is ITT peak temperature affected by altitude during an airstart?
another T-6 Texan II (turboprop aircraft) question. When reading the airstart prodedure in the engine failure during flight section of the manual, I found something that Id appreciate the ...
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How does a helicopter phasing unit work?
I'm currently distance studying to become a B1.3 technician and the course material mentions a phasing unit in the control system, but the descriptions and images are very abstract and I'm having ...
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The Fokker Universal has a crank you have to spin rapidly upon startup. What is it?
The Fokker Universal is one of my favorite aircraft. There is only one complete representation of it in existence at a museum in Canada. A video series I saw on YouTube tells the story of its ...
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How to calculate lift coefficient using pressure distribution? [duplicate]
Above is the image of the question I want to ask. Please clarify on how the pressure coefficients of the upper and lower surfaces of an airfoil can be used, also if there is a set equation to ...
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Why are liquids for cooling not allowed when drilling on CFRP/Al or CFRP/Ti stacks for aeroplane wings?
I recently did some research on the effect of cooling on CFRP/Al7075 drilling. 7075 is used for aeroplane main wing upper skin, and the plates need to be overlayed and drilled for flush riveting.
But ...
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Under what engine conditions is glide performance typically determined in performance charts?
The performance section of an information manual I am using states that the glide range indicated is "power off".
Does this terminology definitely imply that the engine is not firing? or ...
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How can I be US aircraft maintenance technician?
I have only an airframe-related experience of 8 years without a license, but have logbook, my US citizenship in process, and want to become an aircraft technician. How can I become a US aircraft ...
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Could an F-35 really be 3% rare-earth?
The Financial Times' China targets rare earth export curbs to hobble US defence industry states:
Fighter jets such as the F-35, a Lockheed Martin aircraft, rely heavily on rare earths for critical ...
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Sustainable aircraft technologies
I'm a student starting a research project on sustainable aircraft technologies. I've been particularly interested by distributed electric propulsion (DEP), which is currently being tested by NASA with ...
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Deicing Rod for Propellers
Similar to a card hitting the spokes of a bicycle, the card is soft enough to knock the dust off the spokes with no damage. What material would be best to impede the propellers to chip off the ice. ...
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Do modern aircraft still use load bearing ribs in wing construction?
Modern aircraft are generally of monocoque construction. Does this apply only to the fuselage, or are modern wings made without load bearing ribs as well? Are they just for shaping of the metal skin?
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How does a towed banner maintain a steady tilt?
Today a small airplane is towing an advertising banner, about 20 by 30 feet, in a circular path around my town's university campus. The banner stays tilted about 45 degrees to make it easier to read ...
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How does one specialize in a certain sub-field of aerospace engineering? [closed]
I want to become an aerospace engineering but want to be specialized in Aerodynamics. How do I do this in college?
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What is the difference between Mechanical Engineer and Aerospace Engineer?
I really want to get into the Aerospace Engineer industry (I want to design the plane's airframe and basically a little bit of everything) but have no idea what to major in for any job.
I'm really ...
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