Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
Arnab_Chatterjee
Group Title
Any questions on Aircrafts, Spacecrafts , Aeronautics & Astronautics people?
 2 years ago
 2 years ago
Arnab_Chatterjee Group Title
Any questions on Aircrafts, Spacecrafts , Aeronautics & Astronautics people?
 2 years ago
 2 years ago

This Question is Open

mathavraj Group TitleBest ResponseYou've already chosen the best response.1
hi again....well can you explain the future of todays commercial planes
 2 years ago

quarkine Group TitleBest ResponseYou've already chosen the best response.0
hey this is perhaps more of a aerodynamics question but since it seems related to the above topics i thought i may ask.can u help with this  we know that a spherical ball falling in a fluid is acted by viscous force calculated by stoke's law... but how to calculate the viscous force on and terminal velocity of a square sheet falling/moving in a fluid medium for instance say a square sheet of iron ( or something dense) is falling inside sea from a ship such that its flat surface is parallel to sea surface?
 2 years ago

ghazi Group TitleBest ResponseYou've already chosen the best response.1
when a plane flies at at altitude of 15000 feet from where does it get upthrust? Due to the upthrust it takes off but what about the upthrust when it is flying high?
 one year ago

Arnab_Chatterjee Group TitleBest ResponseYou've already chosen the best response.0
Well @ghazi , The upthrust that you are talking about is generated always when the aircraft is in motion (accelerated by its props, jets), so you get upthrust when you are taking off as well as when you are at 15000 ft... the only thing that if the airplane is at the same velocity as when it was taking of,f at15000 ft ...then the lift or the upthrust generated by its wings will be considerably lesser because the air at high altitudes is much less dense (viscosity). Hope this is it... @Arnab_Chatterjee Check the diagram attached.
 one year ago

ghazi Group TitleBest ResponseYou've already chosen the best response.1
well the diagram that you've attache is the time when airplane lifts off..what about the conditions when it is at a certain altitude ....from where does it get upthrust..wings just provides direction...these ain't wings of bird which is in motion to give upthrust...so kindly explain me if it's okay..thank you
 one year ago

Arnab_Chatterjee Group TitleBest ResponseYou've already chosen the best response.0
Its okay...now from the diagram you see, that when the aircraft is in motion, air flows over both over and under the wing....The aircraft's wing is called an aerofoil.. Now...to be simple you can see, by the unique design of the airfoil lets the air passing over it to let go easily without much obstruction...while it is just the opposite for the case of the air flowing below the wing....Thus by Bernoulli's Equation, air (actually any fluid) wants to move from a region of a higher pressure to a region of lower pressure ...so same is the thing here....and thus the air flowing below the wing pushes the wing upward as it wants to go to the region of lower pressure, which lifts the airplane......... In case you don't know Bernoulli's Equation, think about the flow of wind on earth and formation of storms where wind again moves from a region of higher pressure (barometric) to a region of low pressure.. :)
 one year ago

ghazi Group TitleBest ResponseYou've already chosen the best response.1
well this theory is a basic understanding but recently at cambridge university this theory has been stated as obsolete and i am afraid the thing that you've explained is bit contradictory..and i would say not self satisfactory ...by the way the video of new research is on youtube you can find more over there
 one year ago

Arnab_Chatterjee Group TitleBest ResponseYou've already chosen the best response.0
Yes.... I know this is actually got quite contradictions....but still the age old popular explanation choice.....they are using laminar flow...
 one year ago

ghazi Group TitleBest ResponseYou've already chosen the best response.1
that's why i asked... by the way thanks for giving your time
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.