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STS
Dodge Dakota
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1/14/2009
15:48:28
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 Subject: part 1 (video)
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http://www.youtube.com/watch?v=gHmIR1JJXyw
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Joe.Blow
Dodge Dakota
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1/14/2009
15:59:41
|  RE: part 1 (video)
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I wonder if the APU could actually start all 4 engines at the same time.
I know on the triple 7 you can start 2 at the same time.
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LEASEMO
Dodge Dakota
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1/16/2009
14:38:33
|  RE: part 1 (video)
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Hey larry, What the take off speed for a loaded 747? I think they can take off at 150MPH, but acorrding to a magazine I read , its more like 180.
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Marks.S
Dodge Dakota
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1/21/2009
16:15:49
|  RE: part 1 (video)
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Since Larry dosn't know that answer. It really depends on the (GCW)gross combined weight of the plane, if loaded at over 400 tons, then your looking at 175MPH, if mush less then 150MPH or 132 knots should do the trick.
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N56629
GenIII
1/21/2009
23:26:32
| RE: part 1 (video)
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I don't spend much time setting around thinking about things I'll never do. I leave that up to wannabes. Takeoff data should be incredibly easy to find on the internet.
Are you looking for Vmu, Vlof, V1, V2, V2min or what? A speed that will give you best rate or best angle? The latter are not usually considered for this type aircraft.
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Joe.C
Dodge Dakota
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1/22/2009
13:08:13
|  RE: part 1 (video)
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Lets try V2 Larry.
I've seen that size plane do a very short take off at Maho Beach in St. Maarten Island.
http://www.youtube.com/watch?v=-d21sIjCg-M
HAHA now that one is prue comody!
And the one from JAL cargo
http://www.youtube.com/watch?v=cLW39FWmNO8
Taking up about 3,000ft of runway!
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Me again
Dodge Dakota
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1/22/2009
13:11:38
| RE: part 1 (video)
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*comedy*
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N56629
GenIII
1/22/2009
22:23:23
| RE: part 1 (video)
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Joe, I didn't say I would do the research for you. I was just pointing out that there are a variety of air speeds to consider. Asking take off speeds of any plane is pretty vague.
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STS
Dodge Dakota
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1/23/2009
15:29:45
| RE: part 1 (video)
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You got to figure out head wind,elevation of runway, and also temp. has a lot do with the preformance of any aircaft.
It's really dosn't matter the size of the plane as long as you can get left under the wings. Take the C-17 globemaster for example, Larger than a C-130; but just as capable take off from the air on short runway just like the smaller LM-100 (military C-130)
The Boeing 747-400 has a swept back wing as you see in other commerical jet aircraft. So it has to take off at a higher speed than a large plane with a wing that straight. But still you're looking at around 130knots even if the plane is not loaded.
Hope that provides you with what you were looking for.
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N56629
GenIII
1/23/2009
18:47:31
| RE: part 1 (video)
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You will take off at the same airspeed regardless of headwinds. The rest has to do with density altitude. All this has to do with how much runway you will eat up and not what airspeed you need under various conditions.
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Leasemo
Dodge Dakota
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1/26/2009
14:41:22
| RE: part 1 (video)
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I'm not even a pilot and I can know dam well thats BullSH!T!! Larry, I think you had that afro for way too long. Try to catch up to modern styles.
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N56629
GenIII
1/26/2009
15:41:47
| RE: part 1 (video)
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Obviously you don't know the difference between ground speed and air speed. Try putting your infantile attacks behind you and learn something for a change.
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LeaseMo
Dodge Dakota
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1/29/2009
14:47:14
| RE: part 1 (video)
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(V)airspeed=(V)groundspeed-(V)wind
So there you go.
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N56629
GenIII
1/29/2009
21:51:29
| RE: part 1 (video)
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It only took you three days to find that out?
At least you did finally see the grevious error that you made. Generally pilots have a lot of use for intruments that give ground speed since it is SO very illrelevent for flying especially taking off and landing. It is useful for other things like calculating eta. You can easily take off, fly around for hours and land without ever knowing or caring what your ground speed is.
If the V in your equation stands for vector then you are very close to understanding the relationship between airspeed and ground speed.
If I can help you with anything else just let me know.
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STS
Dodge Dakota
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2/02/2009
15:42:58
| RE: part 1 (video)
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Thats how some airline pilots run of the run way (case in point "south west at midway) because they can't figure out there actually ground speed.
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N56629
GenIII
2/02/2009
23:20:31
| RE: part 1 (video)
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STS, don't ever consider flying for a living. It's way over your head. You are proof that reverse evolution is possible.
It is airspeed that gets you off the ground, NOT GROUND SPEED.
Altitude density also plays a big part in how much runway you will use up. All take off and landing distances can be calculated by using airspeed, winds (vectored) and altitude density. Planes DO NOT have ground speed indicators.
Try googling "ground speed indicator" sometime.
If I have keep helping you I'll have to charge you for my time. I'm a CFII MELS. If you can decipher that I'll answer your next question for free.
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STS
Dodge Dakota
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2/03/2009
15:10:30
| RE: part 1 (video)
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NO DUMMY!!!! I said Landing not taking off!!! You got to figure you ground speed when landing
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N56629
GenIII
2/03/2009
18:35:05
| RE: part 1 (video)
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You also land using airspeed. Landing requires the same calculations as taking off. Go take a lesson and learn for yourself,
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hmmm
Dodge Dakota
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2/04/2009
09:37:26
|  RE: part 1 (video)
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what larry is sayn is that if your flying a ultralight in a 60 MPH head wind you have 60 MPH airspeed but you will have 0 MPH ground speed which means you are going nowhere fast just like this topic lol ;o)
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N56629
GenIII
2/04/2009
11:12:53
| RE: part 1 (video)
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hmmmm, you are right but that is not exactly the point. Things like the distance it takes to land or take off are not calculated by knowing your speed over the ground. You need to consult aircraft specific data or charts to determine the individual aircrafts ability to land or take off on a specific runway.
The only time you need to know your ground speed is to estimate your eta or to ensure that you have enough fuel as specified by FAR's.
It's hard to get a thread like this moving when you are dealing with youtube internet pilots. Come to think of it these are the same guys that are ignorant about their Dakotas and most other topics they attempt to address.
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Joe.C
Dodge Dakota
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2/04/2009
13:59:40
| RE: part 1 (video)
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HMMMM and Larry is the same. Nice one on that.
Speed on the ground, as soon as you touch the runway you are no longer dealing with airspeed.
Of course Larry fly's a plane that anyone with a highschool education or GED can fly. We know that you're aircaft dosn't take up much runway to worry about ground speed , we are talking about large commerical aircaft here. Not something that wiegh's about the same a Neon.
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