Questions tagged [cessna-172]

The Cessna 172 Skyhawk is a four-seat light aircraft, very commonly used in flight training

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Why does the Cessna 152/172 nose wheel turn only when the aircraft is moving?

According to the POH, ground control is achieved by a spring loaded steering bungee. But how does it work and why the nose wheel does not move when the aircraft is stationary?
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107 views

What is the string antenna on the back of this Cessna 172 for? [duplicate]

Okay, so this question was asked before. But I didn't get the answer I wanted. I read that its some sort of antenna. what is it, what does it do, and how does it work? Also, is it in anyway related to ...
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1 vote
1 answer
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C172 alternator field circuit breaker(5a) vs alternator pull off circuit breaker(55a)

what’s the different with alt circuit breakers between 5a vs 55a?? If alt field circuit breaker pops out does that mean alternator is not producing electricity? And if al current circuit breaker(55a) ...
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7 votes
2 answers
223 views

Why does a fuel-injected engine have a mixture control?

For example, in a C172S fuel injected type, what does the mixture control lever control exactly in the fuel system? They have a fuel air control unit which regulates fuel flow based on air passing ...
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12 votes
6 answers
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Does this fuel leak from the carburetor of a Cessna 172E need immediate maintenance?

Consider: I'm concerned with a fuel leak I've developed on my Cessna 172E in the past three weeks and appears to be coming from the carburetor. There is even some fuel in the air breather near the ...
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1 answer
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What is the difference between a 1974 Cessna 172 and a Cessna 172M?

Are there any discernible exterior features that are different for a Cessna 172 vs 172M? If a Cessna 172 was made in 1974, is it an "M" series?
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2 votes
1 answer
272 views

On the G1000 lean assist page, what does a positive delta EGT mean?

When leaning the fuel mixture on a C172 using the lean assist feature on the G1000, the hottest cylinder's EGT will be displayed, along with a reading showing the difference between the current ...
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14 votes
4 answers
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What causes a Cessna 172 and its gear to shake violently after landing and braking?

I am sure this was due to my own ignorance on proper technique, but immediately after landing in a Cessna 172, I applied brakes and some moderate aerodynamic braking and experienced an awful and ...
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6 votes
1 answer
289 views

Do I need a ferry permit for an alternator repair ferry flight within a mode C veil?

My Cessna 172 SP's alternator died while stationed at a class D airport, less than 10 miles from my home field (another class D). Both airports are within the mode C veil of a nearby B airport. ...
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6 votes
2 answers
2k views

Why does a Cessna 172 have dihedral wings if it has high wings?

"Dihedral goes hand in hand with low wing aircraft, and anhedral goes with high wing". This is what I assumed till now. But when I see a Cessna 172, the wings are a little dihedral. So why ...
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21 votes
3 answers
9k views

What prevents a small plane like a Cessna or Piper from flying as high as a jet?

Obviously taking oxygen in consideration. What prevents a small plane from being able to fly at a much higher altitude? I know some business jets can fly up to 40,000 ft. Does it have to do with the ...
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2 votes
1 answer
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Why does the Information Manual say "C172S - Flaps 10 (Preferred) for Normal Takeoff", when the models before S-model do not have this note?

Do Flaps 10 really do anything performance-wise other than reducing ground roll and distance over a 50-foot obstacle? If not worried about clearing an obstacle, does a Flaps UP-normal takeoff make ...
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4 votes
1 answer
751 views

Steep turn: do we need rudder once we rolled into a bank angle?

Say a Cessna 172 is in a cruise level flight and clearing turn is just finished. I barely feel a left-turning tendency during the level flight (Maybe torque and slipstream are less significant). I ...
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4 answers
189 views

Why does power help us maintain altitude in slow flight?

I was asked this question and didn’t know how to phrase a nice and easy explanation. What I said is- well because drag is now increasing Un- proportionally to lift, we need something to generate more ...
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20 votes
2 answers
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Why do electronics have to be off before engine startup/shut down on a Cessna 172?

Can someone explain in simple words why we make sure electronics are off before we start up/ shut down our Cessna172 engine?
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Why do we check Idle operation with carb heat on during a Cessna 172 run-up?

I understand this is to “check our engine is still operating at idle”, but can someone explain this more in depth? Like why wouldn’t it?
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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 ...
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1 answer
840 views

Why are the best glide and best range airspeeds different for a C172?

According to Cessna 172 POH the speed for max range with power off, or glide speed, is 65, and achieved at the best L/D ratio. However with power on the speed for max range will be around 75. Why is ...
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0 votes
0 answers
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Why is there a a nose-up pitching tendency during a forward slip in a Cessna 172?

Why is there a tendency for the nose to pitch-up during a forward slip in a Cessna 172 (According to the TC Flight training manual)? Quote: "If full rudder is used, considerable aileron pressure ...
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7 votes
7 answers
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Why does aileron response diminish as speed becomes slower, from slow-flight up to the stall? (In a light trainer)

Can someone phrase the explanation to this in simple words as you would explain to a student?
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14 votes
4 answers
7k views

Why not always take off with 10 degree flaps in a Cessna 172?

10 degree flaps increase our lift, reduce stall speed, reduce ground roll. Seems like all advantages with no disadvantages. So why does the Cessna 172 POH say normal take off is 0-10 degree flaps? Why ...
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8 votes
3 answers
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Why can we not use full throttle in a C172 when cruising at lower altitudes?

My flight training manual (FTM) says that at low altitudes we throttle back our trainers in order to not exceed recommended power settings. But why is that? Is the air close to sea level just too ...
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3 votes
1 answer
152 views

Is there a common route that Seattle GA pilots use to circle Mt Rainier while avoiding class B airspace?

I'd like to fly around Mount Rainier in a C172 out of Renton (KRNT). What route do people usually take? I wonder if I can climb quickly enough once out of Seattle class B airspace for terrain around ...
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2 votes
1 answer
487 views

What is this part on a Cessna 172 engine?

Can any one tell me what this tube with the red is? This is a photo of a 1977 Cessna 172 engine. Looks like the tube is directly connected to the top of the crankshaft.
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0 votes
2 answers
2k views

How to compute thrust to weight ratio of a Cessna 172?

Cessna 172 has weight about 1 ton and it's engine produces about 213 Kg of thrust, and it flies great. So if I make a plane with a weight of 100kg including pilot and fuel so will 15 kg thrust good ...
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10 votes
2 answers
2k views

Why should one not slip a Cessna 172 with flaps extended?

The POH strongly recommends not slipping the AC with full flaps...why? It seems natural in a crosswind approach to allow the horizontal lift component to cancel the airmass movement across the ...
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6 votes
1 answer
533 views

How can I calculate the C.G height for an Aircraft?

before I continue I would like to thank you guys beforehand for the help. I am new to this forum and in aviation in general. I am helping my professor to obtain the C.G coordinates in x, y , z for a ...
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2 answers
6k views

How do I use the takeoff and landing distance charts in the C172 POH?

Can anyone explain how to calculate takeoff and landing distances using the chart for C172s, and please give me an example?
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0 votes
1 answer
165 views

Is there a graph that shows the thrust required for a given airspeed? [duplicate]

I would like to see the graphical relationship between thrust required and airspeed for a typical general aviation aircraft, e.g. C-150 or C172 series.
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1 answer
230 views

Do planes depreciate like cars? [duplicate]

Let's say I was in the market for buying a Cessna. What benefits would buying a new Cessna have over an older one? With cars, the resale value does hit a floor as long as it is safe to drive. Are ...
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6 votes
3 answers
455 views

Is a Cessna 172S still airworthy if factory-installed instrumentation not required for day VFR flight is inoperative?

A C172S I occasionally rent had the EGT gauge placarded INOP when it had a JPI EDM-700 engine monitor installed. The placard sits on the gauge so you can no longer see the needle. Probably the single ...
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1 vote
0 answers
159 views

Can I change the max bank angle on the Garmin G1000 in the C172SP?

I wonder if I can change the max bank angle on the G1000/GFC700 avionics in a C172SP, like you can on the MCP of the 737NG?
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6 votes
1 answer
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Is it illegal to fly a Cessna 172S under day VFR with an inoperative vacuum gauge?

Let's say my vacuum gauge is not working on my C172S and I want to go day VFR flying. There is no MEL. 14 CFR 91.213 details procedures for inoperative instruments, and I think the following ...
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5 votes
1 answer
3k views

Can you identify this antenna on a Cessna 172N?

Does anybody know what this antenna is used for? I suspect a glideslope antenna but I am not totally sure.
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16 votes
5 answers
12k views

What instructions should I give to an untrained passenger for Hand propping Cessna 172N as a pilot?

Does anybody know what is the most effective way of hand propping a Cessna 172N, with a passenger who is not mechanically inclined. So you need to give them the most easy to follow and simple ...
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0 votes
1 answer
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When does fuel indicator indicate red index? C172

Full fuel is 56 gal and usable fuel is 53 for c172r. Other than when the fuel indicator is broken, when the fuel indicator indicate red index? Is there any fuel quantity setting to indicate red?
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5 votes
2 answers
504 views

What kind of container should be used for storing a disassembled Cessna 172?

I need to store a damaged aircraft away rather than leave it exposed to the weather and elements on a tie-down at an airport. It is a Cessna 172. If I remove the wings and horizontal stabilizer (from ...
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1 vote
1 answer
4k views

Is there an actual rated thrust for a Cessna 172 engine at takeoff power?

I could approximate the thrust by knowing the weight of my aircraft and timing the acceleration to takeoff speed, but I think that would be a little dangerous of me as well as only an approximation ...
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4 answers
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Is it right to call out out “50...40..30..RETARD” in a C172 simulator?

Playing flight simulator in a C172 (since we don't have any in my local schools) and the 'co-pilot' I fly with (only know him online) insists on calling out "50...40..30..RETARD, RETARD". I know ...
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0 votes
3 answers
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C172 models and panels design

How many C172 models there are out there and what are the differences between them? Which models have these "modern" (newer) instruments panel design like this one: versus:
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17 votes
4 answers
3k views

Should I have one hand on the throttle during engine ignition?

I'm training in a Cessna 172 for my private pilot license (PPL). My flight instructor recommended that I keep my checklist in one hand (so that I can keep looking outside with my peripheral vision) ...
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4 votes
1 answer
772 views

Why did this pilot have his single-engine license revoked?

5 minutes into this video, a commercial Indonesian pilot is shown performing a very tame version of a parabolic flight path as performed by zero-gravity flights, in a Cessna 172. This video has over ...
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0 votes
1 answer
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How can I find out if there's an EASA STC for something that has an FAA STC?

I want to purchase something for my Cessna from a US web shop. The part has a Supplemental Type Certificate (STC) from the FAA, but I don't find any information about the EASA equivalent. Is there ...
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2 votes
1 answer
3k views

How do you lean mixture using only the instruments on a C172 Skyhawk?

POH manuals always tells to use the voice of the engine as a reference. (Which complicates things a little bit since carbs and fuel injected planes have different "reaction times" for each cylinder) ...
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4 votes
1 answer
1k views

Does the Cessna 152 or 172 have emergency door cable releases?

Is there such a thing as an emergency cable release inside the cockpit of 152 or 172, to remove the door hinge pins in an emergency?
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3 votes
2 answers
4k views

Why is the fuel pump in the startup procedure for a Cessna 172?

I thought fuel pumps were reserved for fuel injected planes in startups and during critical flight phases for all planes? However. There are some X-Plane flight tutorials that tells us to use fuel ...
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1 vote
2 answers
260 views

Why buy an new plane or an helicopter? [closed]

This really keeps coming to my head. A brand new 172SP costs a quarter million while a older one (10 years older or a little bit older) costs for less than 100.000 Dollars and the only visible ...
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5 votes
2 answers
2k views

What is the most fuel efficient climb speed for a C172 SP?

Assuming ISA, sea level, no wind, max gross weight, what speed would be most fuel efficient per 1,000 ft of climb? Alternatively, if that converges to the most fuel efficient cruise speed, when there'...
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  • 492
2 votes
1 answer
1k views

Why does the main battery discharge with the alternator running?

In my cessna 172S, when engine running at any RPM, the current at the main battery is below zero, indicating that the alternator is not charging the battery or the battery discharges, but the standby ...
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4 votes
2 answers
2k views

Using ANR aviation headset with a PC

I just started my studies towards PPL, and am looking into buying a good ANR aviation headset for flying on Cessna 172. I have an office job, and I'm dealing with a lot of noise, hence ideally I'd ...
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