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21
votes
3answers
2k views

Can this aircraft wreckage be identified?

I live in Salinas (central coast California) and there’s an old plane wreck (located within the boundaries of Toro Park County Park in a remote section). On a hike yesterday, we located and took some ...
18
votes
2answers
2k views

What's the function of the plate behind the wheels of the Pilatus Porter?

Anyone knows what's the plate behind the wheel of the Pilatus Porter for?
3
votes
0answers
60 views

How does pitot tube shape affect indicated airspeed? [closed]

Air flow over wings and engine inlets greatly changes due to a number of factors, such as atmospheric conditions, speed, and the design of the surfaces. On some engines you can see mist behind the ...
0
votes
1answer
158 views

What is the bank angle that should be sustained to move in a uniform circular motion? [duplicate]

I want to deduce the rate of turn of targets that move in a uniform circular motion. The radius of the different circles are known in advance. I have searched for my question and found the following ...
0
votes
1answer
71 views

Do mono spar wings need compression strut(or ribs)?

Loyolksip Regarding airplane wings, are compression struts needed in a mono spar wing? Secondly, are anti drag and drag wires needed in a mono spar wings?
2
votes
4answers
368 views

Could modern military aircraft be retrofitted to work with alternative fuels instead of kerosene?

I am geologist and I have heard in 50 years petroleum will be nearly gone. I know for commercial planes there are working projects with clean energy. I can be wrong, but I think military systems ...
6
votes
3answers
313 views

What is a biplane propeller and how efficient is it?

Lazair ultralight series II used biplane props to absorb more power from the engine....so my question is what really is a biplane propeller and are they efficient in comparison to a four bladed prop?
6
votes
1answer
263 views

What is the purpose of drag and anti drag wires?

What are drag and anti drag wires,and how important are they to the performance and strength of the wings of an airplane?
2
votes
1answer
196 views

Is it best to use a thick airfoil or an undercambered airfoil for slow speed flight?

The more the thickness,the more the frontal resistance,hence the more the drag a thick airfoil will produce. Under cambered can help increase lift without increasing the airfoil thickness , therefore ...
0
votes
2answers
104 views

Why flaps can deflect up to 25°+ without stalling the wings? [duplicate]

According to this graph,plain flaps have their highest Cl at about 2 and stalls at about 15°,my question is how then do airplane flaps reach 25°+ of delflection when this gragh clearly states that ...
6
votes
3answers
2k views

What are the disadvantages of using just rudder to roll an airplane?

Ultralights with slight dihedral will roll and yaw on rudder input (e.g the Bloop 3, Maxair Hummer) so some don't have ailerons for the sake of simplicity. Is this kind of control input advisable, or ...
2
votes
2answers
188 views

Is airfoil thickness proportional to drag coefficient?

Does increase in the thickness of a camber airfoil mean more drag will be produced? Why do slow flying planes have thick airfoils when it will just slow them down even more?
17
votes
7answers
4k views

What is wrong with a high-speed landing for an ultralight or GA aircraft?

Is it okay to land an ultralight or a general aviation plane at a speed higher than the recommended landing speed for such plane? Will there be any damage if the descent rate is very low?
1
vote
1answer
94 views

Do elevators have cambered airfoils inverted or symmetrical airfoils

Do horizontal stabilizer of ga planes e.g cessna 172(or ultralights e.g lazair) have cambered airfoils inverted to provide the tail downward force or do they have symmetrical airfoils at negative aoi ...
0
votes
4answers
179 views

Why wing ribs have diagonal struts

Why do ribs have diagonal struts,why not vertical as seen in airfoil 1?
-3
votes
2answers
333 views

What is this aircraft seen over Southern California? [closed]

It looked similar in shape to the DH108 Swallow seen at the top of this website https://en.wikipedia.org/wiki/Tailless_aircraft The best likeness I have found online (except the wings were flat and ...
0
votes
0answers
110 views

Is it a good thing that ailerons remain deflected and the stick is hard to move?

The aileron stick of my homebuilt ultralight is stiff (hard to move) and the aileron itself can remain in its deflection angle hands free, is that a good thing?
0
votes
2answers
195 views

What is the average g force experienced on takeoff for an ultralight?

How much g-force is made on an ultralight during take off if its upward velocity of 2m/s?And what's the average g force experienced during takeoff on an ultralight?
-2
votes
2answers
161 views

100% Homebuilt Airplane [closed]

THIS IS JUST A SIMULATION OF THE INTENDED AILERON THAT I'LL BUILD AND PUT ON MY HOMEMEADE PLANE.(I scrampled all the materials I could find in my backyard). Do you find any abnormality in this aileron ...
5
votes
3answers
422 views

Can I use PVC pipes for the rib on the wings of my homemade airplane? [closed]

Can I use a PVC pipe as the rib of the wings of my homemade airplane?A rib is already load tested, and it failed at 40kg of weight and it is supposed to hold just 10kg in flight.
8
votes
2answers
425 views

Why are airplanes called ‘she’?

What is the reason that airplanes in English have a female gender? Please illuminate the historical or scientific reason.
1
vote
1answer
248 views

Why do some airplanes fly at a very low speed (like this one) at a speed of 433 km/h (234 knots) at a whopping high altitude of 26,500 ft?

Okay. So I'am just having a doubt on this flight (BA359) flying from Lyon, France en-route to London Heathrow. It is flying at a way low speed of 433 km/h (234 knots) in which i think is a bit weird. ...
0
votes
0answers
66 views

What would it take to bring a more efficient lifting-body airplane design (possibly a BWB) to commercial market? [duplicate]

I know that the MAIN reason Boeing and Airbus are held back on this is the development costs. It costs a lot to even develop a slightly new design, let alone mass manufacturing it. But that's the ...
17
votes
7answers
5k views

Why are airplanes described as the safest method of transportation? [closed]

I will have my first flight tomorrow. It is my first time that I get into an airplane, and by the time am writing this post, I am feeling anxious and stressed a lot. I even don't talk to anyone as it ...
1
vote
0answers
39 views

How do interceptors communicate with the airplane crew when the radio is dead? [duplicate]

A week ago an airplane lost the radio connection to the tower due to technical difficulties in German airspace (article in german). Thats why interceptors started to escort the plane and to check if ...