# All Questions

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### Is it at all possible (or safe) to pursue a pilot's license with a history of mental illness?

I am in my late twenties. To put it bluntly I have a history of mental illness going back to my teens. My quick summary: Diagnosed with depression and prescribed Wellbutrin in my teens. I ...
65 views

### Why so much throttle work on navy fighter?

• Look at his left hand,why so much throttle work when fly ,what is he doing? • Is throttle response very slow? It seemst to me that fighter dont accelerate so much when he he put full throttle.. • I ...
25 views

### Factors to be considered when re-engining aircraft

What parts of the aircraft need to be adjusted / refitted / added when fitting new (different type) of engines? Also what what kind of re-certification regarding airworthiness etc. will be necessary?
14 views

### is there a free software like Airfoil Optimizer for airfoil selection?

is there a free and up-to-date alternative of airfoil optimizer software created by DaVinci Technologies (the same creator of airplane PDQ)? it should have the ability to take the aircraft properties/...
57 views

### Writing Research: What stick sensation would you expect in an Su-15 with a total hydraulic flight system failure?

The title pretty much says it all. I have a very specific research question in relation to a writing project I'm working on. The main character is in an Su-15 performing low flying military training, ...
44 views

### Do any airplanes use a 3-axis joystick? [duplicate]

Do any airplanes use a 3-axis joystick? Or is the Z-axis twist not mechanically or ergonomically (i.e. cross-axis coupling) viable?
642 views

### How is a plane with only ailerons and jet (no props) controlled?

I saw this video and was wondering how he is controlling the plane: It looks like he only has ailerons. It does look like he is shifting his body weight. Is that the ...
168 views

### Why is “L Fuel Low” illuminating on my Cessna that is full of gas?

I fly a fuel injected Cessna 172SP 200 hp. Tanks were just about full today and every 5 seconds or so in flight, I would get “L fuel low” and the left fuel indicator would drop to 0. I’ve consulted ...
62 views

### How does altitude affect the TAS and thrust of an electric fan powered aircraft?

I'm confused about the relation between IAS, TAS, thrust, and shaft power, for an electric application. Yes, higher air is thinner, and thrust goes down due to higher airspeed. What I've researched ...
138 views

### Can I fly this six motor drone? [closed]

My body weight; 70kg, Drone weight; 50kg, Props length 0.7m, 6 motors (2hp each), Total weight 120kg, Total horsepower 12, Each motor runs 3000rpm, Please can I fly it. Thanks!!! drawing of the drone
23 views

### Make up / Build terms on ADRM [closed]

While looking into the bagagge section, I can not figure out what are this terms referred to:. The baggage build area is the largest area of the baggage system and it is important that the spatial ...
2k views

### Is it possible for a plane to accelerate easily from 30 to 45 mph in flight while it struggles to reach 30 mph (the engine runs at constant power)?

In two letters sent to Dr. G. A. Spratt (an aviation enthusiast), Wilbur Wright reported the progress he and his brother had made, up to September 10, 1904, regarding Flyer II, a plane powered by a 16-...
79 views

### How can I calculate the minimum thrust to weight ratio required for a given takeoff distance?

I am building a plane and I have a take-off distance of 50ft, is there a way for me to estimate the thrust-to-weight ratio required for this constraint (even if it was in terms of say wing loading)?
309 views

### Is there a reason that commercial jets do not have a “dead man’s switch”?

Following high-profile cases of disappearances such as MH370, as well as the lower-profile but no doubt common radar infringement and level / airspace busts that we don’t hear about often, is there a ...
93 views

### Why do countries place limits on what foreign-registered aircraft can do?

Just read in local news Israeli regulator is giving a hard time on a company operating regularly out of Israel a plane with foreign (US) registration. The company wants US registration to get better ...
73 views

### Why don't the magnetic compass and direction indicator spin the same direction?

You set a direction indicator (DI) based on the magnetic compass in certain GA aircraft, e.g. Cessna 172. During training you're taught how to align the DI with the compass, the DI being the opposite ...
315 views

### What is this helicopter type at a U.S. military base?

This helicopter is on a US military base, shown by Google Maps. I don't recognize the glass windows at the front top.
4k views

### Is it normal to use only one hand on the yoke while landing?

In this video taken from this question, the video shows the pilot using one hand on the yoke and one hand on something else (perhaps the throttle? I'm not a pilot). Is it normal to do landings with ...
35 views

### Is there any way to plot airfoil shape without the coordinate file [closed]

Is there any way to plot airfoil shape in solid work without the coordinate file, i purchased a blade with an airfoil shape that i don't know the type of the profile. Is it possible to trace the shape ...
542 views

### Did the X-15 ever conduct a point-to-point flight?

The North American X-15 rocketplane flew at up to Mach 7 and at very high altitudes, it was also capable of spaceflight but these were quite steep parabolic patterns. At Mach 7 it flew leveled and my ...
68 views

### What is the cause of blips on a VHF receiver?

A VHF receiver of aviation band tuned at 120 MHz receives unwanted blips like “tik tik” after every two seconds. Its located at airport. What could be the cause?
110 views

### At what velocity would a plane become difficult to control? [closed]

If a plane flew in the stratosphere at very high speeds there's obviously a limit beyond which the plane would be hard to control and navigation would become too difficult. On Mars for instance, you ...
84 views

### Does the retirement age for commercial airline pilots vary across the globe?

Do the retirement age of commercial airlines pilot varies from country to country?
144 views

### Is Cessna 150 with incorrectly marked ASI airworthy?

I've looked a bit at the CFRs trying to determine this for sure, but haven't found a clear answer.. One of the Cessna 150s that I rent from the local FBO had it's airspeed indicator swapped out four ...
5k views

### Can airliners land with auto pilot in gusty wind conditions?

Why does the pilot make so many movements? I don't see that plane is moving all that much, but his yoke movements are strong and fast. For someone who is not a pilot, it almost looks like panicked ...
5k views

### How do airlines replace a pilot at the last minute if they're unable to fly?

I would like to know what decision do the commercial airline carriers take when there is emergency case of a pilot who cannot fly the plane because of personal emergency conditions? Emergency ...
49 views

### What factors determine magnitude and orientation of induced velocity at propeller blade?

• Magnitude What factors determine magnitude of "Vind" (induced velocity)? • Orientation If we take analogy with induced velocity at wing,isnt "Vind" must be prependicular to Vr? • ...
60 views

### Please youropinion about the compony where you rent the airplane [closed]

Could you please give me the recommendation feedback regarding what compony to choose to rent a private plane. Your opinion about any compony what you used
63 views

### How much pressure do boost and jettison fuel pumps produce?

What is the pressure output of a (boost) fuel pump on a Boeing 767 and/or 777, compared to a heavy-duty jettison fuel pump.
1k views

### Why does exhaust flow inwards through a radial turbocharger?

In a radial compressor, the air enters centrally and passes outwards, aided by centrifugal force. But, as the diagram shows, in piston-engine superchargers the driving exhaust gas flows inwards ...
3k views

### Can you identify this engine?

I am studying Aircraft mechanics currently, and in our academy we have some aircraft engines and different types of them, and I need please your help to know the reference of one of them, and if it is ...
44 views

### Power changes and trim forces. related to position of Center of Mass (CoG), or Center of Pressure?

Theoretically (and Actually) do power increases cause a pitching tendency (and a need to adjust pitch trim), because the thrust line is not aligned with the Center of pressure, or, as I understand it, ...
143 views

### Are there jet aircraft for whose flights astrodynamics must be taken into account? [duplicate]

Civilian jet airliners don't need to push their yokes down to follow the curvature of the Earth because within the atmosphere the curvature is accounted for by automatical systems, right? I wonder ...
1k views

### Why does the attitude indicator gyro not precess the same way that a directional gyro does?

The directional gyro needs to be realigned every so often, but the attitude indicator does not, and I have a hard time finding why.
239 views

### How are both squawk and altitude transmited when operating a Transponder in Mode C?

I know that in Mode $3$ (which includes Mode A and Mode C) the aircraft transmits $12$ information pulses. That corresponds to $2^{12}=4096$ squawk combinations in Mode A which are sent to ATC to ...
70 views

### Can I use Stihl fs250 engine for ultralight aircraft? [duplicate]

RPM 9000 Hp 2.2 Engine weight 6kg Plane weight 40kg Body weight. 70 Propellers(2blades) length 30 inches Wings length 120 inches
79 views

### Can thermals or high density altitude improve fuel efficiency?

Suppose a pilot is just cruising around building flight time. In order to get the most flight time for fuel, would flying on a dry cold day or on a hot thermal filled day save fuel?
89 views

### Does the center of lift have to be in line with the center of mass?

Imagine 2 theoretical planes, A and B, shown in the image below. The center of mass is yellow, and the center of lift is blue. Would plane A and plane B work as well as an airplane with the center of ...
98 views

### What is the difference between a spin and an uncontrolled roll in an high speed dive?

A comment I had on another (now deleted) question states that Air china 006 didn't spin. For me it was a spin (unwanted roll due to asymmetrical stall). The comment states it was "it was a slow ...
2k views

### Why is this F/A-18 flying through a hailstorm of sparkles?

The F/A-18 Super Hornet squadron VF-102 Diamondbacks, flying from the USS Ronald Reagan, has posted a montage video of its 2019 Indo-China cruise. At about 5:15, the video shows a night-time cockpit ...
953 views

### Why does my wind tunnel experiment give two different stall angles of attack?

When I increase the angle of attack from 0 to 20 the stall begins at 18 deg. When I decrease the angle of attack from 20 to 0 the stall ends at 13 deg. Why the difference and what value (13 or 18 deg) ...
118 views

### Single-engine plane with long range flyable in Europe

Not 100% sure if choice of airplane is on-topic here, please let me know if not. Just got my PPL, and looking for a choice of single-engine meeting a few conditions: Long-range, definitely >800nm, ...
84 views

### What gas turbines have the following configuration?

Is there any jet engines--with published data on the dimension of the turbines and compressors--that are of the configuration of 2 Low Pressure compressor, 8 High Pressure compressor, 2 High Pressure ...
56 views

### What were the rules about night flights from LHR in the 80s?

I was just reading a question over on movies.SE: How could Ryan land in New York in early morning?, and the accepted answer suggests that Jack Ryan's plane takes off from LHR at about 4am. One of the ...
23 views

### What is the diameter of each stage of the PW800 engine compressor and turbine?

I am an Aerospace Engineering student working to analyze P&WC's PW800 engine family--specifically, the PW814GA, for a project and we need to know some hard-to-find data. Does anyone knows where I ...
3k views

### Isn't it dangerous for a soldier to sit on the outside of a flying helicopter?

AH-64 during an extraction exercise at Camp Bondsteel, Kosovo in 2007 with a soldier on the avionics bay. I lit upon this image on Wikipedia. I see that the soldier is harnessed fastened to the ...
196 views

### What is the minimum speed at which the Antonov An-2 can maintain level flight?

The An-2 famously has "no stall speed", as control can be maintained in descent at arbitrarily low airspeed. As wikipedia says: The An-2 has no stall speed, a fact which is quoted in the ...
2k views

### What is the cockpit shown in this picture?

What is the cockpit shown in the picture below?