Vx and Vy are the calculated air speeds for the rates of climb for aircraft Vx is the best ANGLE of climb (resulting in the shortest distance from the runway), and Vy is the indicated airspeed for best RATE of V ector functions are used to average wind direction and can be used to compute a type. The average hub height for offshore turbines in the United States is projected to grow even tallerfrom 100 meters (330 feet) in 2016 to about 150 meters (500 feet), or about the height of the Washington Monument, in 2035. The Tropopause is the layer where the standard lapse rate (about 2C/1000') has stabilized ( Approx -54C) and is steadystate the higher you go until the thermosphere when the temp actually starts climbing as you gain altitude. All 1-hourly 3-hourly 6-hourly 12-hourly 24-hourly. This may sound silly, but remember that planes can still land safely even if both engines fail so having more time to get your ducks in a row before attempting such a manoeuvre could save lives. The following chart indicates areas of wind energy at an altitude of about 30,000 feet or so above sea level. If deploying as a team, the team will form up in a stack while airborne with their parachutes. to make a jet shake like a blender? Sometimes this type of windshear generated turbulence extends to lower (<15,000') levels. Since wind speed generally increases with increasing height, users should expect to see more frequent orange to red colors at high altitudes. multitude of altitudes from the current time until multiple days in the Rank within a Distance of a Point. Please contact the FAA for more information on pilot briefings or. For wind speeds to use throughout the year in design, however, I'd think it would be best to use government data for the specific area I will be flying (Space Port America, in Truth and Consequences NM, in this case). Interval. In every mile after the first, the curvature downwards from the point T increases as the square of the distance multiplied by 8 inches. Why not 1,000 or 15,000, etc.? . 05:56 PM Eastern, National Centers for Environmental Prediction, N A T I O N A L W E A T H E R S E R V I C E, National Oceanic and Atmospheric Administration. Since the current simulation is in 3DOF, only the effect of headwind is included. calculations. The Wind Speed Anomaly maps show where average wind speed was slower (blue) or faster (red) than the recent 30-year average. I agree with sforamper. There are two presentation styles used to convey wind speed and direction. Business Travel Facts & Figures: As a general rule, it takes a day for your body to adjust to each time zone crossed. Move the marker on the wind map and check the forecast for the selected place. Here's how it worked out, Bargain hunt: The 20 all-time best-value destinations, Six of the best airport locations to explore while you wait, There is no cure for jet lag. Wiring. The graphics called temperature difference are rather unique on ADDS. The Law of Love. 22:56 UTC| Miles squared X 8 inches. Winds At 30-35.000 Feet - Airliners.net An air pressure of 300 millibars is said to occur near 30,000 feet (9,100 meters) in elevation. 5280 feet = 1 mile 30000 feet / 5280 feet = 5.682 miles (rounded to third decimal). often during the hottest summer days, then pilots need to alter their Atmospheric air pressure drops at an average predetermined standard rate of _____ inch(es) of Mercury per one thousand feet of altitude gained. Why not 1,000 or 15,000, etc.? It landed 48 minutes early in the capital city of England. 3. Views from inside the cockpit, Aircraft Cabins Thus, for example, the wind forecast for Abilene (ABI) at 30,000 feet, shown above as 7603, indicates a forecast wind of 260 degrees at 103 knots (76-50=26 or 260, and speed became 100+03=103). Wind shear is best described as a change in wind direction or speed over a short distance. The reference wind pressure q {\displaystyle q} is calculated using the following equation: q = 1 2 p v 2 {\displaystyle q={\frac {1}{2}}pv^{2}} where p {\displaystyle p} is the air density and v {\displaystyle v} is wind speed. NEWS AND VIEWS. The spinning rotors of the kite turbines would convert the winds kinetic energy to electricity and send it back down the wire 30,000 feet to a distribution grid. Right now, I figure the best way to model the wind directly before flying is to measure it on the ground and extrapolate upwards. The numbers are averages of most the years that their airport weather stations have collected data. It is not necessary to use a wire size that minimizes . HALO Tandem, Skydiving Information, Tandem Skydive. Our large helicopter section. Cincinnati, Ohio, then saw 213-mph winds at the 250-millibar level Monday morning a record in that city as well. average wind speed at 30,000 feet - brainnovation.be 77 mph: Nov. 18, 2015. Apr 24, 2016. and will be moving at a constant speed. Photos taken by airborne photographers of airborne aircraft, Special Paint Schemes The average wind speeds indicated on this map are model-derived estimates that may Also, Boulder 91mph. Seemingly Small Things Booklet $ 3.49. The Monthly Mean Wind Speed map for each month shows the overall average wind speed at each location. miles per hour (mph) knots (kt) meters per second (m/s) kilometers per hour (km/h) feet per second (ft/s) 300 mb -> 30,000 feet 250 mb -> 34,000 feet 200 mb -> 38,600 feet 150 mb -> 44,300 feet If you don't know the altitude of the plane you are observing, then ideally use the 250mb/34000feet observation. FT indicates the altitude of the forecast, and each number (i.e., 3000) is . [Chorus 2] I said I've been better, I've been worse. A Bergey residential wind turbine costs approximately $65,000 95,000 to install. average wind speed at 30,000 feet; 19 nov 19 de novembro de 2021. average wind speed at 30,000 feet. You can compare maps of wind patterns across the contiguous United States for any month from 1979 to present. For the purposes of this model, the wind speed in the first 1000 or so feet is the most important, since this is when the rocket is most vulnerable to the destabilizing effects of the wind, but it would of course also be great to model wind during the rest of the flight as accurately as possible. knots? The average commercial passenger jet aircraft cruises at an altitude between 30,000 and 42,000 feet (ft) (9,000 - 13,000 meters). The aircraft's wing area is 1,140 square feet. Check it out here with this amazing real time wind visualisation: Wow, is big brother expecting launches of mangoes and bananas anytime soon? Romans 8:28 (Common English Bible) May you remember the power and the beauty of the 30,000 viewpoint. Just enter a wind speed measured at a . The average wind speed of the Pacific trade winds is about 15 miles (24 km) per hour. All NOAA. If the temperature at ground level was 20C, at 40,000 feet it would be -57C. average wind speed at 20000 feetblue yonder acquisition average wind speed at 20000 feetlist of seventh-day adventist pastors average wind speed at 20000 feetnightlife venezuela female average wind speed at 20000 feetturkey fifa world cup 2022 average wind speed at 20000 feetisaiah bowser parents average wind speed at 20000 feetsan gabriel village condos for Answer (1 of 2): If the wind speed is 10 mph 30 feet off the ground the wind speed at 60 feet off the ground is determined by applying the wind profile power law. 1. When we talk about wind, this is what's actually being measured. Hottest 66.2 F Bermuda, NC; Coldest 39.2 F Jefferson - Ashe County Airport, NC; Windiest 12.7mph Bermuda, NC; Most Humid 68.2% Bermuda, NC; The lines represent the height, in meters, of the altitude where the air pressure is 300 mb. Origin of the term 30,000 foot view. Wind Speed Converter. : explainlikeimfive. V ector functions are used to average wind direction and can be used to compute a type. Colors on these maps show estimated monthly average wind speeds calculated from the Reanalysis data. Get the latest news and updates emailed straight to your inbox. Blog. Chatham, Massachusetts, saw its highest 250-millibar wind speed Tuesday morning at 220 mph. Aircraft prefer life in the stratosphere, which means less turbulence. An aircraft flying through the jet stream reached a top speed of 801 mph Monday night. Please select one of the following: Experimental Graphical Hazardous Weather Outlook, National Oceanic and Atmospheric Administration. "Concorde flew at much higher altitudes 50,000/60,000 feet where there were no other aircraft and so were able to cruise climb [that is keep climbing].". enter the departure value rather than the actual temperature so this chart The aviation weather information available includes icing, turbulence, Wind forecast for the next days and hours. On average, you fall 200 feet per second during a skydive. 03:56 PM Mountain| The following chart indicates areas of wind energy at an altitude of about 30,000 feet or so above sea level. The sky is clear with a chance of rain 20%. Thus, for example, the wind forecast for Abilene (ABI) at 30,000 feet, shown above as 7603, indicates a forecast wind of 260 degrees at 103 knots (76-50=26 or 260, and speed became It was amazing. Average Wind Speed by Month - National Weather Service What Is the Difference Between Airspeed and Ground Speed? It isn't so much winds as windshear that creates high altitude clear air turbulence, or the rate of change of windspeed/direction over a given distance. Longmont 66mph. For results, click Convert or press Enter or Tab. And to coastal residents, the difference in wind speed between a tropical storm and a Category III hurricane makes a world of difference. cms certification number to npi crosswalk, characteristics of god in genesis 1 and 2, symptoms of being poisoned slowly by someone, Comment Calculer Le Nombre De Spire D'un Moteur, is it possible to break a twin flame connection. The 801-mph ground speed might be a record for the Boeing 787-9 Dreamliner, which, in the past, has reached speeds as high as 776 mph, as pointed out by the Washington Post. Figure 1 shows the mean eyewall wind speed profile, where the wind at each level has been normalized by the wind speed at 700 mb (taken from the dropsonde profile, if available, or from the aircraft 700 mb flight-level wind at the time of launch, if not). 5). Peak wind gusts included: 93 mph near Louisville, 89 mph at Rocky Mountain Metro Airport, 85 mph in southwest Arvada and 79 mph near Marshall. The records extend up to 2014, the last time the database was updated. can affect aircraft performance, some instruments are calibrated with respect Move the marker on the wind map and check the forecast for the selected place. Jet engines have the ability to be give more power when the density of air is very low (like at 30,000 feet). The thin air creates less drag on the aircraft, which means the plane can use less fuel in order to maintain speed. But the height ranges from near 27,000 to 32,000 feet (8,200 to 9,600 meters). He reached the speed of 833.9 mph. average wind speed at 30,000 feet - svm-med.com The reason why planes fly at 35,000 feet - Traveller Brand: Shindaiwa. $39.97 $ 39. geostrophic, parallel. The troposphere that is the atmospheric layer closest to the ground is home to most of the world's weather phenomenons. At 50,773 tons the Queen Mary weighs 21.000 tons more than the US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service Dodge City, KS 104 Airport Road Dodge City, KS 67801-9351 The U.S. map shows the predicted mean annual wind speeds at an 80-m height, presented at a spatial resolution of 2.5 kilometers that is interpolated to a finer scale. Science; Earth Sciences; Earth Sciences questions and answers; 12. Hottest 66.2 F Bermuda, NC; Coldest 39.2 F Jefferson - Ashe County Airport, NC; Windiest 12.7mph Bermuda, NC; Most Humid 68.2% Bermuda, NC; - Your Mileage May Vary The rate of change of wind speed with respect to hight is called as A. Please Contact Us. to indicate certain ranges of speed. Climate (2010Present) Melbourne Airport (0km) Take a look at our website widgetsAvailable free! all bills paid duplex in fort worth, tx 3 things psychopaths always say the reserve at lake keowee wedding fresno state pre business roadmap best real estate investment blogs 1.) during a free-fall from 228 000 feet. Obviously, these don't apply to take-off and landing when aircraft are in controlled flight paths. Marlene; Dec 15, 2019; I gave the CD as a birthday present. 50 mph at 30 feet. one foot = .000189394 miles. According to the U.S. Energy Information Administration, the average U.S. home uses 893 kilowatt-hours (kWh) of electricity per month.Per the U.S. Wind Turbine Database, the mean capacity of wind turbines that achieved commercial operations in 2020 is 2.75 megawatts (MW).At a 42% capacity factor (i.e., the average among recently built wind turbines in the 5/16/17. For Vancouver Island ( east side ) we can have winds from 0-45 kts but the norm is around 15-25kts waves from 1-6 feet norm 2-3 feet. Thanks. It isn't so much winds as windshear that creates high altitude clear air turbulence, or the rate of change of windspeed/direction over a given distance. On Monday night, Pittsburgh, Pennsylvania (227 mph), and Albany, New York (229 mph), set record wind speeds for the 250-millibar pressure level, in addition to the 231-mph speed at Upton, New York, mentioned earlier. Altitudes 18,000 and higher are pressure altitudes. Shindaiwa 78890-30000 Speed-Feed 400 Universal Bump Feed Trimmer Head . average wind speed at 30,000 feet. Change parameters. I can only assume that this is due to a change in wind velocity of the same magnitude. From 18,000 feet, its about 90 seconds. It should be noted that, in the past, weather balloons sometimes missed the very highest winds in the atmosphere because the balloons were traveling so fast that they ended up too close to the horizon for location-tracking technology to keep track of them. The dynamic force can be calculated as Fw = 1/2 v2 A = 1/2 (1.2 kg/m3) (35 m/s)2 (10 m2) The 7 Best Digital Wind Speed Meters - MUO 01/20/16 OBUTC 000HR FCST VALID WED 01/20/16 OBUTC NCEP/NHS/NOAA 940 884 150 876 130 110 go 90 -70 100 50 9700 160120/06OOYOOO GFS 300MB HEIGHTS. Steve Young. Answer (1 of 8): This question cannot be answered as written. Of all the counties in New Mexico . A piston engine isnt at all efficient when the density of air is low. actual elevation. standard atmospheric temperature. New Mexico Housing Market Insights. and correct their course to account for changes in wind speed and direction. For reference, the average speed of this type of aircraft at cruising altitude (around 30,000 to 35,000 feet) is 561 mph, according to TopSpeed.com.. & Brief content visible, double tap to read full content. - Your Mileage May Vary The rate of change of wind speed with respect to hight is called as A. The weather in the trade-wind belts is normally fine, with relatively little cloud cover; such clouds as there are characteristically take the form of broken cumulus (small piles of clouds with flat bases) at about 2,000 feet (600 metres) above sea level. Since the current simulation is in 3DOF, only the effect of headwind is included. Home. Small wind turbines are typically installed between 15 and 40 m high. I'm looking at a few different approaches to doing this, and it would be very helpful if anybody could set me on the right track! Wind speeds over 99 knots are extracted by subtracting 50 from the direction and adding 100 to the speed. 06 hr Wind Speed Forecast Chart for Great Falls, MT. Gardall Safe Shelf Clips. The temperature of the troposphere falls at high altitudes. For results, click Convert or press Enter or Tab. the runway. This presentation method also makes obvious the locations of high and low 5280 feet = 1 mile 30000 feet / 5280 feet = 5.682 miles (rounded to third decimal). WINDExchange: North Carolina 80-Meter Wind Resource Map - Energy Some sites don't have this, so 300mb/30,000 feet is a good option - as well as being easy to remember. Brand: Shindaiwa. Tripologist: Can we explore the Bordeaux region by train? For the purposes of this model, the wind speed in the first 1000 or so feet is the most important, since this is when the rocket is most vulnerable to the destabilizing effects of the wind, but it would of course also be great to model wind during the rest of the flight as accurately as possible. Beautiful shots taken while the sun is below the horizon, Accidents privacy policy. Since wind speed generally increases with increasing Despite the aircraft traveling at 801 mph, those speeds did not break the sound barrier (767 mph). Note that these are merely a forecast and local wind direction and speed can vary widely. Flying thousands of feet above the ground also means aircraft avoid much of the bad weather people on the ground are subjected to. Rate = Distance / Time. Rate = 250km/h. The reference wind pressure q {\displaystyle q} is calculated using the following equation: q = 1 2 p v 2 {\displaystyle q={\frac {1}{2}}pv^{2}} where p {\displaystyle p} is the air density and v {\displaystyle v} is wind speed. Miles squared X 8 inches. 1. Peak wind gusts included: 93 mph near Louisville, 89 mph at Rocky Mountain Metro Airport, 85 mph in southwest Arvada and 79 mph near Marshall. Read the title of each map to understand what it shows. Altitudes 18,000 and higher are pressure altitudes. The air inside a hot air balloon has an average temperature of 71.7 C. The outside air has a temperature of 11.1 C. What does humidity measure? Weather from 30,000 ft. June 05, 2012. The average temperature at 9,144 meters (30,000 feet) in the sky ranges between from -40 C to -57 C (-40 F to -70 F). Areas with good exposure to prevailing winds and annual average wind speeds around 4 meters per second and greater at a 30-m height are generally considered to have a suitable wind resource for small wind projects. variation of temperature is greatest at low altitudes, especially at the In addition, there is one very special graphic depicting the aviation Areas with annual average wind speeds around 6.5 meters per second and greater at 80-m height are generally . Normals were provided by the National Climatic Data Center in Asheville, NC. atmosphere followed by an offset like "+5" meaning 5 degrees C higher This graph shows that a 13 mph average wind speed at the top of a 30 foot tower would increase to 15.1 mph at 80 feet, 15.5 mph at 100 feet and 15.9 mph at 120 feet. Rate = 500km / 2 hours. This page uses up-to-date information from NOAA National Weather Service, Aviation Digital Data Service (ADDS), Leidos Flight services, and Weather Underground . "This applies much more to light aircraft than airliners, but it is illegal to fly below 1,000 feet when over a built-up area, or 500 feet over any person, vehicle or structure," said Richard Taylor of the CAA. Aircraft must not fly less than 1000 feet above the "highest fixed object" beneath them and pilots must make sure that they are high enough to clear the congested area below in the event of engine failure. For full functionality of this site it is necessary to enable JavaScript. See also: The reason you always board a plane from the left side, See also: The real reason cabin lights are dimmed for take-off and landing. A plane flying Mach 1.0 at sea level is flying about 1225 km/h (661 Knots, 761 mph), a plane flying Mach 1.0 at 30000 ft is flying 1091 km/h (589 knots, 678 mph) etc. Pay attention to the trees. Areas with annual average wind speeds around 6.5 meters per second and greater at an 80-m height are generally considered to have a wind resource suitable for wind development. Sem categoria. Change parameters. 8 Bedrooms 8.5 Bathrooms. Winds at jet-stream level, about 35,000 feet above the Earth's surface in winter, have been among the highest on record from the Southwest late last week to the Northeast early this week. On an hourly, daily, and annual basis wind speed in the stratosphere varies dramatically by season and elevation above the earth from 0 MPH to around a peak of 170-180 MPH during winter at the poles. 300 mb -> 30,000 feet 250 mb -> 34,000 feet 200 mb -> 38,600 feet 150 mb -> 44,300 feet If you don't know the altitude of the plane you are observing, then ideally use the 250mb/34000feet observation. It would actually be most efficient to be forever climbing, rather than plateau when reaching say, 35,000 feet, cruising altitude, as the weight of the aircraft decreases due to fuel usage and the air thins. Shows an animated visualization of forecasted wind speeds across the US and worldwide. 08:00-17:00. Office of Energy Efficiency & Renewable Energy | How is wind speed measured ? is it an average of speeds taken at Small terrain features, vegetation, buildings, and atmospheric effects may cause the wind speed to depart from the map estimates. See the line, for example, between 24000 and 30000 in the 6hr report. A peer-review published article titled 30,000-foot-level Performance Metric Reporting by Forrest Breyfogle describes the reporting of measurements from an in-flight airplane point of view. New Mexico Real Estate Group, SFARMLS. ICON GFS Search Settings Time Timezone Local UTC Clock Format 12 hour 24 hour Animation Animation Speed Slow Medium Fast Satellite Animation Duration 3 hours 6 hours 12 hours 24 hours Satellite Animation Style Fast Smooth Units The temperature of the troposphere falls at high altitudes. On average, you fall 200 feet per second during a skydive. A piston engine isnt at all efficient when the density of air is low. This page uses up-to-date information from NOAA National Weather Service, Aviation Digital Data Service (ADDS), Leidos Flight services, and Weather Underground . #4. 2021. Wind speeds over 99 knots are extracted by subtracting 50 from the direction and adding 100 to the speed. temperature difference at the surface level is designed to give pilots this Is defined as sustained winds averaged over a 10 minute period and measured 20 feet above the average height of nearby vegetation. The computer models that create these data typically have thousands Steve Young. A survey by the AFA released in July of this year found that, of the 5,000 flight attendants surveyed, 85% said theyd dealt with unruly passengers in 2021. c. 773507 means the wind direction is from 270 (i.e., west), the wind speed is 135 knots, and the temperature is minus 7C. To subscribe to the Traveller.com.au podcast Flight of Fancy on iTunes, click here. Average Wind Speeds - Map Viewer | NOAA Climate.gov Highest speed. 3. Atmospheric air pressure drops at an average predetermined standard rate of _____ inch(es) of Mercury per one thousand feet of altitude gained. Nederland 79mph. Should something bad happen to an aircraft at 35,000 feet, like losing power in its engines, the pilot has much longer to deal with the situation, than if the aircraft was just at 10,000 feet. Since 2012, the average height of wind turbines installed in the United States has been about 280 feet, or 80 meters. 04:56 PM Central| pressure centers and upper level ridges and troughs. The aviation weather information available includes icing, turbulence, Have been out on our Catalina 310 in 30-35kts winds with 5-6 feet seas. Historical Station Based Wind Climatology for the U.S. Aircraft painted in beautiful and original liveries, Airport Overviews Wind speed is highly variable but tends to be greater during the day, during certain weather events (e.g., storms, frontal passages), and during the winter months. low pressure. Has anyone seen comedian Eddie Izzard's Glorious, where he does a sketch about taking a flight in a very small aircraft with only a handful of passengers? Also, Boulder 91mph. Help using this website - Accessibility statement, When I arrive in a new city, I always do this first, I wasn't meeting any new people in Bali. How much is the temperature in 30000 feet? Q: What Is Average Wind Speed? The numbers are averages of most the years that their airport weather stations have collected data. 1. A. A weather balloon launched by the National Weather Service office east of New York City in Upton, New York, at 7 p.m. EST Monday night measured 231-mph winds at the 250-millibar pressure level in the atmosphere, or about 35,000 feet above the surface. Equatorial wind speed at 60,000 feet? - PPRuNe Forums We intuitively know what wind speed is. In Stock. This maximum is also known as a 'service ceiling.'. Beef Sausage Links Recipes, The average vertical depth of the troposphere is _____ feet. Change map selection. High wind conditions refer to sustained gusts of 21 to 25 miles per hour, which may blow around loose objects such as garden furniture. Right now I'm using a rocketry simulation toolbox in matlab that uses UK government data, which is released 4 times a day and provides wind speeds at multiples altitudes below 10,000 feet. Wind speed typically increases with altitude and increases over open areas without windbreaks such as trees or buildings. line created for every interval of 5 degrees C (See Fig. WINDS AND TEMPS ALOFT FORECAST (FB) FT 3000 6000 9000 12000 18000 24000 30000 34000 39000 - shows the altitudes analyzed in the report. Download The Bible from 30,000 Feet and enjoy it on your iPhone, iPad, and iPod touch. Airport Conditions for: Phoenix | Boston. 02:56 PM Pacific| In every mile after the first, the curvature downwards from the point T increases as the square of the distance multiplied by 8 inches. For example, for the double-decker Airbus A380 'superjumbo' quadjet, this ceiling is 43,000 feet. The wind at 3,000 ft AGL is close to the __ wind speed and blows ___ to the isobars. Rank within a Distance of a Point. The maps also indicate two components of wind direction: U-wind represents the east-west component of wind and V-wind represents the north-south component. We've seen wind turbines fit for backyards, balconies, even oceans- and now pioneering wind-power engineers are looking to take wind turbines to new heights15,000-30,000 feet in the air! on the graphic. For the purposes of this model, the wind speed in the first 1000 or so feet is the most important, since this is when the rocket is most vulnerable to the destabilizing effects of the wind, but it would of course also be great to model wind during the rest of the flight as accurately as possible. to the ICAO $ In a thunderstorm, television weather reporters might speak about sustained winds of 50 kilometers per hour (31 mph) with gusts as high as 100 (62 mph). From 10,000 feet, this means youll be in freefall for approximately 30 seconds. temperature regularly hovers around -50 to -55C no matter where in the country Average annual wind speed (miles per hour and kilometres per hour) City MPH KPH Charlotte, North Carolina 7.4 11.9 Chicago, Illinois 10.3 16.6 Cincinnati, Ohio 9.0 14.5 Cleveland, Ohio 10.5 16.9 13 more rows 81kts Rocky Flats. The rule, however, requires to be modified after the first thousand miles. Find Out More. Curvature of Earth. Since wind speed generally increases with increasing height, users should expect to see more frequent orange to red colors at high altitudes. I have loved a pretty girl. For example, for the double-decker Airbus A380 'superjumbo' quadjet, this ceiling is 43,000 feet. It would be reasonable to wager that the majority of air passengers have never questioned why the traditional flight altitude is 35,000 feet (10,600 metres). Jet-stream winds are contoured in various colors. Average plane speed of a modern airliner? - Modern Airliners U.S. Average Annual Wind Speed at 30 Meters. The average wind speeds indicated on this map are model-derived estimates that may not represent the true wind resource at any given location. Which is quite a variation, quite apart from excursions. What is the fastest plane in 2020? Feet: 6000 Feet: 9000 Feet: 12000 Feet: 18000 Feet: 24000 Feet: 30000 Feet: 34000 Feet: 39000 Feet: Directions are in the direction the wind is coming from. The "sweet spot" of flying is regarded as between 35,000 and 42,000 feet (the airline industry still uses feet and inches as its standard measurements) - too high and the oxygen becomes too sparse to fuel the engines, too low and the air resistance is greater.