The-Hogs.net - Washington Football Discussion, Redskins to Commanders Era

UK Skins Fan wrote:I'm sorry, the conveyor can do whatever the heck it likes, but it isn't stop those jet engines from getting the aircraft moving forward.

Unless the conveyor is also capable of gltting the air around the aircraft to move at 150mph in the same direction as the wings are trying to go...

crazyhorse1 wrote:The conveyor belt's speed and friction against the plane's wheels create the backward drag. The extent of the friction would be determined by the materials of the wheels and conveyor belt. That this is true can be determined by an armchair experiment. The friction holding the plane back can be likened to an enormous chain connecting the wheels to the conveyor belt. If that chain is strong enough that plane will not fly. Nor would the plane fly if its wheels were buried in sand.

JansenFan wrote:No offense, but I've seen a Harrier take off first hand, and the wings pivot.

Third, lift is created because the airspeed above an airfoil move a greater speed than the air under the foil. This makes a low preasure above the wing and sucks the plain into the sky. I know, low above or high below what's the difference. I don't really know.

UK Skins Fan wrote:skinsfan#33 wrote:

Third, lift is created because the airspeed above an airfoil move a greater speed than the air under the foil. This makes a low preasure above the wing and sucks the plain into the sky. I know, low above or high below what's the difference. I don't really know.

There's every chance I could send people to sleep here (I'm used to that though).

There are two types of air pressure in play here - static pressure and dynamic pressure. Static is the kind of pressure that you experience all the time, just by being surrounded by the atmosphere. Dynamic pressure is the result of movement, such as that experienced when you stick your hand out of the window of a moving car.

Now, the theory goes that Total Pressure=Static Pressure+Dynamic Pressure. You'll just have to take that at face value.

The shape of an aerofoil means that air travelling over the upper surface has to move faster than than the air below. This increases the dynamic pressure above the wing, because the air is moving faster (it's more dynamic, if you like). BUT, the total pressure has to remain constant, which means that the static pressure above the wing drops as the dynamic pressure increases. Below the wing, the static pressure is higher than above the wing.

This difference in static pressure is what creates the lift. Just as with water under high pressure, the air below the wing will try to flow to the area above the wing, where the static pressure is lower. This pushes the wing up.

I'm studying for my pilot's licence at the moment, so it does me good to repeat this stuff whenever I can! It doesn't necessarily help with the conveyor belt question though, but you seemed in need of assistance.

Can somebody please wake up those students at the back? I can hear the snoring from across the Atlantic...

Countertrey wrote:Oh, bother.

Should never have convinced him that he was smart. My bad, folks. Won't make that mistake twice. Next time, I'll tell an Aussie, instead.

1niksder wrote:

crazyhorse1 wrote:The conveyor belt's speed and friction against the plane's wheels create the backward drag. The extent of the friction would be determined by the materials of the wheels and conveyor belt. That this is true can be determined by an armchair experiment. The friction holding the plane back can be likened to an enormous chain connecting the wheels to the conveyor belt. If that chain is strong enough that plane will not fly. Nor would the plane fly if its wheels were buried in sand.

The wheels ARE NOT chained down nor are they in sand in this case they are doing what wheels do when they make contact with a surface. In this case the wheel are already moving as it the conveyor belt, and plane. at some point the plane with half enough airflow moving in the opposite direction to give the plan lift or the plane will make it to the of and off the belt and the plane takes off into the wild blue yonder.

One way or the other the plane takes off at some point.

I still go with these














This is the anti-conveyor belt:


The plane wrecks. The pressure of 150 mph air low into the back of the jets nullifies the suck of the fronts of the jets. The friction of the wheels on the wheel on the conveyor belt holding it in place-- causes such pressure that the plane's structure collapses. You can't cap the back of a jet with wind pressure or anything else. Even birds clogging the back of a jet will cause a collapse.

skinsfan#33 wrote:After reading all that I have a few comments.

First counter tre and the brits are right, the plain will fly. The plain will not stay on the tread mill, because the thrust pushes on air not the ground. Imagine if you were running on a tread mill and a giant came along and kicked you right in the backside, you're coming off that threadmill.

Second a Harrier is a VSTOL (verticle/short take off and landing) and it's wings don't move. VTOL aicraft can only take off straight up and down (a helicopter).

Third, lift is created because the airspeed above an airfoil move a greater speed than the air under the foil. This makes a low preasure above the wing and sucks the plain into the sky. I know, low above or high below what's the difference. I don't really know.

I was stationed on the USS Theodore Roosevelt for her first cruise and we once lauched an S-3 at anchor outside of Naples. Don't ask me why, but we did and it made it.

crazyhorse1 wrote:

skinsfan#33 wrote:After reading all that I have a few comments.

First counter tre and the brits are right, the plain will fly. The plain will not stay on the tread mill, because the thrust pushes on air not the ground. Imagine if you were running on a tread mill and a giant came along and kicked you right in the backside, you're coming off that threadmill.

Second a Harrier is a VSTOL (verticle/short take off and landing) and it's wings don't move. VTOL aicraft can only take off straight up and down (a helicopter).

Third, lift is created because the airspeed above an airfoil move a greater speed than the air under the foil. This makes a low preasure above the wing and sucks the plain into the sky. I know, low above or high below what's the difference. I don't really know.

I was stationed on the USS Theodore Roosevelt for her first cruise and we once lauched an S-3 at anchor outside of Naples. Don't ask me why, but we did and it made it.

If the conveyor belt is moving the plane backwards at 150 mph, there is 150 mph of wind flowing into the back jets and over the plane from the rear. These factors would counter the force from the front and cancel the plane's tendency to lift by forcing it down. The plane would come apart.

Fios wrote:How in god's name does a conveyor belt generate wind?

Fios wrote:I have been personally selected by Mr. E. Umbekwe to receive a sum of U.S. $14 million, he and his family must flee their war-torn country and they picked ME (through a very trusted associate) to get their money. I have explained to them that I am glad to help but I only deal in cash, I eagerly await their response. So long suckers!

Irn-Bru wrote:

Fios wrote:I have been personally selected by Mr. E. Umbekwe to receive a sum of U.S. $14 million, he and his family must flee their war-torn country and they picked ME (through a very trusted associate) to get their money. I have explained to them that I am glad to help but I only deal in cash, I eagerly await their response. So long suckers!

Hey, when the Namibian Minister of Interior Finance contacts you with a desperate plea for help, you don't hesitate, you help! Thank you, Fios; without good Samaritans like you, Africa would be mired in third-world poverty for much longer than it will be. Some would call you a national hero, in a way.

Fios wrote:Yeah, the weird thing is, insofar as I can tell, Namibia is not, in fact, at war ... so that's odd ... but I won't let those people down, if they (sensibly) want to put their fortune in a lowwwwwwwwwwwwwwwww-yield savings account then, by god, I am going to help them

Countertrey wrote:Oh, bother.

Should never have convinced him that he was smart. My bad, folks. Won't make that mistake twice. Next time, I'll tell an Aussie, instead.

Fios wrote:

crazyhorse1 wrote:

skinsfan#33 wrote:After reading all that I have a few comments.

First counter tre and the brits are right, the plain will fly. The plain will not stay on the tread mill, because the thrust pushes on air not the ground. Imagine if you were running on a tread mill and a giant came along and kicked you right in the backside, you're coming off that threadmill.

Second a Harrier is a VSTOL (verticle/short take off and landing) and it's wings don't move. VTOL aicraft can only take off straight up and down (a helicopter).

Third, lift is created because the airspeed above an airfoil move a greater speed than the air under the foil. This makes a low preasure above the wing and sucks the plain into the sky. I know, low above or high below what's the difference. I don't really know.

I was stationed on the USS Theodore Roosevelt for her first cruise and we once lauched an S-3 at anchor outside of Naples. Don't ask me why, but we did and it made it.

If the conveyor belt is moving the plane backwards at 150 mph, there is 150 mph of wind flowing into the back jets and over the plane from the rear. These factors would counter the force from the front and cancel the plane's tendency to lift by forcing it down. The plane would come apart.

How in god's name does a conveyor belt generate wind?

UK Skins Fan wrote:I think that when it comes to generating wind, the conveyor belt is no competition for any of the political threads on this site.

I think that when it comes to generating wind, the conveyor belt is no competition for any of the political threads on this site.

Countertrey wrote:You, sir, make an assumption that the conveyor is, in fact, agnostic regarding politics. That you have not heard from the conveyor a preferrence for any political philosophy, does not mean it is apolitical.


Do we know whether it is moving left to right, or right to left?

Hey, it makes a difference.