Aircraft Center Of Gravitty Explained - [What Is It And Why Is It so Important].

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The Aircraft Center of Gravity (C.G.) is the theoretical point of your Aircraft where the entire Weight is considered to act.
The mass distribution of your passengers, cargo, fuel, etc will affects the Center of Gravity location.
So, if you move bags from the front hold to the back hold your C.G will move Aft.
Every Aircraft has a Forward and an Aft Center of gravity location Limit.
These limits will make sure that your aircraft is flyable and stable. This is the reason why we carefully perform the weight and balance calculation before every take-off and if the C.G. is out of limits we need to change the weight distribution.
The Center of gravity works very closely with the center of pressure which is, the theoretical point of your aircraft where the Lift is considered to act.
The location of the C.G. compared to the location of the C.P. plays a huge role in Aircraft Stability. A Forward Center of Gravity will make your aircraft's nose-heavy and more stable.
If your C.G. is located in front of the C.P the aircraft will have a tendency to pitch down, so in order to fly in a level flight we need the horizontal Stabilizer to generate a downward force.
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Timestamps:
00:00 Intro
00:49 What is the Center Of Gravity
01:27 Center Of Gravity Location Explained on a White Board.
03:19 Center of Gravity Limits
04:51 Why it is important to calculate the C.G. Location
06:08 Center of Gravity and Center Of Pressure
09:00 Aircraft Stability and C.G.
10:40 Final Thoughts
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Disclaimer:
THIS VIDEO IS FOR ENTERTAINMENT PURPOSES ONLY.
NOT FOR REAL-LIFE OPERATIONS.
PLEASE REFER TO THE OFFICIAL MANUAL AND DOCUMENTATION.
==============================================================

Опубликовано:

9 июл 2024

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Комментарии : 57

@PILOTCLIMB 3 года назад

👇Comment below with your questions and thoughts👇

@davegrohl2532 2 года назад

Thank you so much you can't even imagine how thankful I am this video helped me alot with preparation for my finals

@PILOTCLIMB 2 года назад

I'm glad it helped you!! You are very welcome

@flightdeckq400pilot4 18 дней назад

AN EXPLANATION ON THE LIZFW, LITOW AND LILAW IN CONJUNCTION WITH THE DOI AND MAC FROM YOUR PERSPECTIVE WOULD REALLY BE APPRECIATED...THESE APPEAR ON COMPUTERISED LOADSHEETS.

@capricepascoerealtor519 Год назад

Great explanation! Thank you very much!

@PILOTCLIMB Год назад

You are very welcome!

@Hacker12128 3 года назад

Now I finally understand it. Thank you very much, Captain.

@PILOTCLIMB 3 года назад

You are welcome!! I'm very happy to see the video helped you👍

@datpudding5338 2 года назад

I came here to get back into memory where to place the centre of lift in ksp to get my aircraft flying and I was totally blown away by your great explanation 👍

@PILOTCLIMB 2 года назад

I'm glad to read you like the video!! That's great! Thanks for watching

@muhruzeozturk5598 Год назад

Thank you for the excellent explanations as always. Which one would be best in this situation for takeoff performance?

@PILOTCLIMB Год назад

You are very welcome!! Usually you load the Aircraft to have better cruise performance, since is the phase of the flight where you spend the most of the time... A fwr cg will make your nose heavier thus an higher Vr should be required

@MrCed0802 3 года назад

Really enjoying the way you explain aviation concept

@PILOTCLIMB 3 года назад

I'm glad to see you liked the video 👍 Thanks for watching!

@buddyboyudon Год назад

I was an aircraft Load suprvisor. One day a 747 flight came in from Bombay stop over and flying to JFK 600 kilo freight to off load. At the time, I was also dealing with another arrival. So sent half my crew to deal with off load . When I finally got to the Bombay flight Rear loading door closing! My crew said there was no frieght to unload.Hold empty! The flight then took off to JFK After I was informed there was indeed 600 Kilo freight on board! What I would like to know is, WHaT IF IT WAS 6000 KILO REMAINING ON BOARD! How would the aircraft perform on take off?

@PILOTCLIMB Год назад

That would be s problem because the aircraft is heavier than the pilots think, so they calculated the takeoff performance for a lighter aircraft.

@argydimitrelis611 3 года назад

Super important video

@PILOTCLIMB 3 года назад

I hope you are doing great! Thanks for the kind comment!

@rainbowsofian5791 2 месяца назад

Thanks cpt

@NomadSDA Год назад

Great Video captain thank you. What is the point called in the '''middle'' that neutral point , if you put cg in front of it planes nose down and if cg is aft of it planes nose up.Is it called Aerodynamic Center or something else?

@PILOTCLIMB Год назад

You are very welcome! The Aerodynamic center is used as a point where the Aerodynamic forces are applied and doesn't change with the angle of attack.

@ananthu8124 2 года назад

✈️✈️✈️ U got a new fan ❤️

@PILOTCLIMB 2 года назад

Hey, welcome on-board!! Don't hesitate to ask questions when watching the rest of the videos!

@ananthu8124 2 года назад

@@PILOTCLIMB sure sir 😘🤩

@jomanehagos8299 Месяц назад

Thanks but I was expecting u explain it in respect to economy of the operation also

@user-px8zu3ty4d 2 года назад

Hi Captain thanks for the explainations, i've learned a lot from your videos, just one question for 737 is that alway forward cg airplane which means for 737 the cg is always in front of cp?

@PILOTCLIMB 2 года назад

Hey, thanks for watching and the comment!! Yes you are right!

@user-px8zu3ty4d 2 года назад

@@PILOTCLIMB thanks and wait for your update videos😀

@sohankantimahanthi 2 года назад

How is centre of pressure different from centre of lift

@PILOTCLIMB 2 года назад

Hey, thanks for watching... they are the same... is the point where the lift is considered to act..

@steffenleo5997 3 года назад

Good Day Capt Gabriele, i have other question. For Boeing 737 aircraft if during flight fuel were used/burn and reduce the weight of aircraft where is the CG Center of Gravitity moving? Is it moving forward or aft ward?

@PILOTCLIMB 3 года назад

Hey, many thanks for watching! You always ask very good questions! On a Swept back wing (like the Boeing 737) normally the CG will move Forward as you burn the fuel that is inside the wing. This is so because, usually, the wing tips are emply first. If you have fuel on the center tank and on the wings tanks however, you will burn first the fuel on the center tanks (which will cause the CG to move aft) and than you will burn the fuel on the wings (which will cause the cg to fwr). I wish you a great day!

@rohrichoak9740 3 года назад

Great video. So the center of gravity doesn't stay exactly at the same point as the weight is, right? I presume there's a ratio between center of gravity point and the exact location of the weight, am I correct?

@PILOTCLIMB 3 года назад

Many thanks for watching!! The C.G. location change if the masses inside the plane change location. For example, if all passengers move at the back of the plane during Cruise, this will make the C.g. to move aft. If the weights inside the plane stay constant and don't move the CG won't move. Let me know if I answered your quistion👍

@efrenrocamora663 Год назад

If fuel is burned, what happens to the cg?

@PILOTCLIMB Год назад

It depends on the CG, Wings model and aircraft model.

@captsonko.9345 3 года назад

Captain can the aircraft fly with a Cof G aft the C of P .

@PILOTCLIMB 3 года назад

hey, I hope you are well! It could, the problem is that an aft CG will decrease the aircraft stability but it will increase its maneuverability. Some military AIrcraft were designed that way. Are you a Simmer? Have a great day!

@captsonko.9345 3 года назад

Yes i am thanks for the good explanation i love and follow your lessons capt.GOD BLESS YOU.

@PILOTCLIMB 3 года назад

@@captsonko.9345 many thanks for you support 🙏

@leonegentile6081 2 года назад

Hello Captain, great video as usual. I have a quick question for you though : Why is the CG expressed in percentage? For example if my simulator tells me I have a CG of 23.7% what does that mean? How do I know if it's acting more in the AFT part or in the FWD part? Thanks in advance 😊

@PILOTCLIMB 2 года назад

Many thanks for the great comment!! The 23% is the percentage of you MAC (mean aerodynamic chord). That means that you CG is located along your MAC at a distance that equals 23% of the length of the MAC. Let me know if I answered your question

@leonegentile6081 2 года назад

@@PILOTCLIMB Great answer, I had no doubt about it. I'm gonna have to look for the MAC because I never heard of it. Anyways, thanks, you're the best out there and deserve way more subscribers and views!

@leonegentile6081 2 года назад

As far as I understood, the MAC is the distance between the Leading Edge Wing and the Trailing Edge. If these are parallel the chord is equal at all points. For these huge commercial aircraft the design of the wings and the weight make it difficult to calculate all of these things and so they use the CG as a percentage from the MAC itself. If a plane has a CG between 0-50% is nose-heavy whereas if it has a percentage beyond 50% is tail-heavy. It has some limitations as you said in your video about the location of the CG so the ideal one should be around 25%. Thanks for the infos, if you're running out of ideas you could make a video about MAC, Leading Edge MAC and Trailing Edge MAC, it would be very educational, useful and interesting 😊😃

@PILOTCLIMB 2 года назад

@@leonegentile6081 You are the reason why I'm putting countless hours to produce content!! My very proud of the PILOTCLIMB community!! You are doing a great job and it gives me a great deal of pleasure to see that you are learning and improving!! Many thanks for you support!!

@leonegentile6081 2 года назад

@@PILOTCLIMB Actually I'm the one proud here. I follow a lot of pilots, german, English, American but you're the only Italian that puts passion in what he does, regardless of his views and subscriptions. I'd say you're Italian from your name and I'm Italian too, viva L'Italia e forza Gabriele, sei il numero uno!

@steffenleo5997 3 года назад

Good Day Capt Gabriele, First thank you for this great video I have 2 question here 1. Is CG equal to MAC(in %) ? 2. In video 10:25 with nose heavy/forward CG stick/control column force will increased also stall speed increased. Could you please explain more detail about this 2 relation? Thanks you and have a great day ahead....👍👍👍

@PILOTCLIMB 3 года назад

Hey, many thanks for watching!! 1.Usually the C.G. location is expressed as a % of MAC in the Airliners Jet. If you look at smaller planes the C.G location can be expressed in distance from the datum line. You simply need to verify this info in your Airplane Flight manual. 2. Nose heavy plane will increase your stall speed because the plane will reach the critical Angle Of Attack sooner. (I made a separate video where I explain the Critical Angle Of Attack.) Lert me know if you have more questions.👍

@steffenleo5997 3 года назад

@@PILOTCLIMB Thanks Capt Gabriele for your reply and explanation I have another question, if we unload the wing this mean we increased lift force compare to weight/gravity force or we increased AOA. Is this statement true or false?

@PILOTCLIMB 3 года назад

@@steffenleo5997 You are welcome! What do you mean by unloading the wings?? Reducing the weight?? For example, less fuel?? Or unloading the wings by reducing the G force??

@steffenleo5997 3 года назад

@@PILOTCLIMB i see other video on youtube the training pilot say unload the wing first by pushing the nose down to increase the roll rate. In the video it is about plane at nose high over critical AOA. So i understand his comment as if we unload the wing it mean we increase the lift vector, is it true?

@steffenleo5997 3 года назад

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