Contact Us It's quite a lot, isn't it? Our Weather Balloon Inflator kit includes a launch scale which you can use to measure the weight of your particular payload setup. You divide the weight of your balloon and payload (2400 g) by 28 g/cu.ft. Slower ascent rates will result in longer flights, higher altitude and less wake turbulence. Weather balloons are the primary source of data above the ground. 4: Choose the size of the Rocketman Parachute that will be used, typically between 4 and 5ft in diameter. National Weather Service Credit also to Rich Wareham for work on the predictor. The lift force created by this additional helium is called positive lift. We decide we don't want to rent two 55 cu.ft. Forecast Discussion Microbursts Outreach Materials, About Us The calculation of the tool is quite accurate and is permanently optimized by us. Rivers and Lakes, Forecasts Please select one of the following: Local Geographic Information Systems (GIS) Data, National Oceanic and Atmospheric Administration. To request a quote, inquire about availability or place an order, please give us a call or submit an email through the form below. 1024 trajectories, where r B is the balloon radius. Calculate drop speed . Copyright 2013 Cambridge University Space Flight. The sides are about 0.051 mm thick before release and will be only 0.0025 mm thick at typical bursting altitudes! The National Weather Service has cut back on weather balloon launches at some of its sites because of shortages of hydrogen and helium used to lift them, potentially affecting . The above result is only a rough approximation. selecting a type of gas (or entering a custom gas density), adjusting modelling parameters document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); document.getElementById( "ak_js_2" ).setAttribute( "value", ( new Date() ).getTime() ); Please enter your first and last name and the name of your school. (a) Calculate the buoyant force acting on the balloon. Burst Calculator Web Page. If you have any questions, please get in touch with us and we will do our best to answer them and post them here for everyone else. We use Totexatmospheric weather balloons for our flights. 2 to calculate the mass of helium required: m He = 1.58 kg 4. The times listed are Universal Time. To your surprise it doesn't climb. Meteorological Conversions and Calculations. NOAA Weather Radio Two identical size balloons made by the same manufacturer will typically burst at the same diameter/volume. The real values depends on multiple variables, for example, the current weather conditions. It just floats right in front of you, neither climbing nor descending. Converters. Typically, youll be using either helium or hydrogen. helium can conservatively lift 27.82 grams). These include Applies to products with a minimum order value per purchase of 100. The jet streams vary by the minute, once you are satisfied with this, save the location, and get ready for your flight. Click the tick box The same principle applies here: as helium has a density lower than the density of air, a balloon filled with this gas will start moving up. The following will convert a given value to different units of measurement. You can find a few examples of how you can influence the altitude/flight distance/flight time in the video tutorial below the helium calculator. Non-Precipitation Warnings Easy steps for ballooning weather info: 1. Let's get on with the calculations! Local Climate Data, Warnings and Other Products for our launch, but what if we don't want to spend the money to rent an additional 55 cu.ft tank when we only need 5 extra cu.ft? split (n = run duration in hours divided by splitting interval in hours). What happens if we reduce our balloon size from 600 g to 350 g? Office History, Education For example the polystyrene probe including the equipment, the parachute and the special cord. Compare different ascent rates and burst altitudes. Want to discuss an upcoming launch or chat about weather balloons? The flight distance depends not only on the amount of gas in the balloon but also on the wind speed. We're wondering how fast such balloons may fly with the wind! This is because your balloon has only enough helium to lift its own weight and the weight of the payload. An instrument called a radiosonde is attached to the balloon to measure pressure, temperature and relative humidity as it ascends up into the atmosphere. Next the Balloon Performance Calculator calculates the altitude at which the balloon will burst. Flood Products Description Storm Spotters (SKYWARN) Additional tanks of helium may be required when attaching experiments to your Eagle Pro. Check out our ballooning adventures in previous blog posts here . There are several online calculators to help you with selecting a size for your weather balloon. 3 with eq. Please try another search. This tool will help you to predict the estimated flight path of your high altitude balloon. What other options do we have? Graphical Forecasts, Climate and Past Weather On stormy days, the weather balloon can fly more than 130 kilometres as the crow flies, or it can fly a "loop" and land only a few kilometres away. The ascent-rate is velocity where the buoyancy (force) of the . Furthermore, by changing the ascent rate you can influence the altitude and thus not only the flight time, but in combination with the flight route calculation also the flight distance or the landing area. Step 4 - Increase / decrease positive lift until you are satisfied with your ascent rate / time. The input parameters are; temperature, balloon mass, payload mass, initial diameter and max diameter. Pressing enter or clicking away from the box you are This calculator is developed by our friends at StratoStar Technologies and is highly accurate. This program developed at ARL (Draxler, 1996) can be used to visualize all the potential flow combinations from up to three different starting heights. Use the balloon calculator tools to determine how much helium you need to purchase. These will generally be latex atmospheric weather balloon just like the National Weather Service uses. CoCoRaHS, Local Research and Outreach Premium Service Composite Forecasts. With a right-click the context menu opens. NASA, SpaceX Eying Thursday for Crew-6 Launch, NASA Awards Contract Supporting Langleys Research, Science Services, NASAs SpaceX Crew-5 to Discuss Mission, Splashdown from Space, NASA Administrator Selects New Head of Science, NASA, SpaceX Look to March 2 for Next Available Crew-6 Launch Attempt, Crew-6 in Terminal Count, Ready for Launch From NASAs Kennedy Space Center. As we explained in the lead time calculator, delivery is only one of three main periods in manufacturing, but it is definitely a crucial part. To determine how many helium balloons to lift a person: Determine your weight - for instance, 75 kg. A typical weather balloon grows in size as it ascends through the atmosphere, starting off at about six feet wide, and expanding to roughly 20 feet in diameter as it rises. Taiwan's Defense Ministry says China sent 25 warplanes and three warships toward the island on Wednesday, as tensions remain high between Beijing and Taipei's main backer Washington. Balloon Performance Calculator Input Balloon Size(grams) Balloon Size 350 600 1200 1500 3000 Payload Weight(grams, 1-20000) Positive Lift(grams, 1-20000) Calculate Output Required Helium (in cubic feet) Estimated Burst Altitude (in meters) If you're performing these calculations by hand, you can surely use the lifting force of one gram per liter; however, our helium balloons calculator uses a more precise value of 1.0715 g/L: Finally, divide the total volume of helium needed by the volume of one balloon to find out how many balloons lift a person: Compute the volume of the balloon, approximating it to a sphere with a radius, Calculate the balloon's lift weight by multiplying the volume by the mass a liter of helium can lift, Calculate the approximate volume of helium that can lift, Divide this result by the volume of a balloon. Copyright 2023 High Altitude Science | POS and Ecommerce by Shopify. This program developed at ARL (Draxler, 1996) We will assume that the balloons are perfectly spherical and use the volume of a sphere formula: You will need roughly five thousand balloons to fly. How to Calculate Burst Altitude for Balloons and HabHub Overview 7,247 views Jun 16, 2018 129 Dislike Share Save SciJoy 5.07K subscribers What is the maximum burst altitude of your high altitude. We look forward to receiving your message. The 'Constants' box can be used to adjust constants used by the calculator. The tool uses current weather and wind conditions for the prediction. We just added a Tutorialssection to our website. All you have to do is to simply fill in your launch coordinates and give some information about the ascent and descent rates. An instrument called a radiosonde which is about the size of a juice box is attached to the balloon to measure pressure, temperature and relative humidity as it ascends into the atmosphere.. Usage is very straightforward: enter the payload mass into the first box, select the balloon mass from the second box, and type in either a desired burst altitude in meters or ascent rate in meters per second in the relevent box. Our average ascent rate is too slow. Without this information, accurate forecasts beyond a few hours would be almost impossible! Our Balloon Performance Calculator is conservative when calculating predicted burst altitude. Please select the weather balloon you use. About Our. Inflating & Sealing the Weather Balloon. Which initial GFS model time? The formula then adjusts the amount of helium you should fill in the weather balloon. Launch site Date Local launch time : Applies to products with a minimum order value per purchase of 100. We decrease our positive lift until our calculator tells us our setup requires 55 cu.ft for the launch. Summer Safety Campaign Reaching altitudes of 35 km (22 miles) or higher, the balloons endure temperatures as cold as -90 C (-130 F). The balloon flights last for around 2 hours, can drift as far as 125 miles away, and rise up to over 100,000 ft. (about 20 miles) in the atmosphere! consent. The valid time for the forecast is the sum of the model initialization time and the forecast period. The Chinese. You inflate your balloon with 86 cu.ft. We will call you back in a timely manner. Daily Rainfall Plots Burst Calculator. 1: When starting with the Balloon Performance Calculator, you will want to pick the balloon size. Work to switch to Leaflet mapping and to use the Tawhiri API by Mark Jessop, for the SondeHub project. Is it the end of the world if you touch the balloon with bare hands? To learn more about launching weather balloons, purchase our Eagle Pro Weather Balloon Kit. Step 1 - Input your balloon size, payload weight, and positive lift of 100 g into the calculator. This increase our ascent time from 120 minutes to 140 minutes. The balloons, which start out measuring about 6 ft. wide before release, expand as they rise to about 20 ft. in diameter! We considered. All-Hazards Awareness Booklet Hydrogen is cheaper and can give more lift due to its lower density, however, hydrogen is very flammable and must be handled with extreme care. Twice a day, every day of the year, weather balloons are released simultaneously from almost 900 locations worldwide! We experiment with different positive lift numbers (just enter different Positive Lift values between 100 and 1,000 g and click Calculate) until we find 460 g gives us an ascent time of exactly 120 minutes. document.getElementById( "ak_js_3" ).setAttribute( "value", ( new Date() ).getTime() ); * The code is valid once. The radiosonde is powered by a small battery. Hurricane Preparedness Most flight predictions tools use the Global Forecast System (GFS) weather models to supply their predictions. This will not include the balloon weight. Our average ascent rate is now too fast. Connect the tank to the balloon, and open it until it is filled enough. Typically, you'll be using either helium or hydrogen. to a location selected by the user. . Balloon Trajectory Forecasts. You have no products in your shopping cart. of helium and release your payload. We recommend that you follow along through this tutorial by entering the values into your own Balloon Performance Calculator tool. Make sure to check the weather on the day you are planning on launching, make sure its a sunny day, with very low winds. Written by Jon Sowman, Adam Greig and Daniel Richman for CUSF. As an example, let's say you want to launch a payload that weighs 1200 grams (including the weight of the parachute, rigging, etc.). The changeof the climb rate correlates with the maximum flight altitude. Figure 2: Balloon parameters for a (upper) 1200 gram balloon and (lower) 1500 gram balloon. (b) Find the net force on the balloon and determine whether the balloon will rise or . Weather balloons, which are made of latex or synthetic rubber (neoprene), are filled with either hydrogen or helium. This program will also tell you about your maximum altitude in meters, a recommended altitude is between 24,000 meters to 33,000 meters. Balloon Ascent Rate Calculator. Calculate the balloon's lift weight by multiplying the volume by the mass a liter of helium can lift 1.0715 g. We find that the volume is: V = 4/3 r = 4/3 13.97 = 11420.3cm = 11.420 L And the mass: m = 11.420 L 1.0715 g/L = 12.2 g. With 100 g positive lift it will take 251 minutes (4 hr 11 min) for our 600 g balloon carrying a 600 g payload to reach an estimated burst altitude of 31,580 m (103,000 ft). Basically, the prognosisimmediately before the launch of the weather balloon is very accurate. milehightraveler / Getty Images. Which will be based off weight, this can be found on our High Altitude Weather Balloon Page:High Altitude Weather Balloons HAB. US Dept of Commerce About Radar. Our burst altitude is 29,950 m. This is less than the 100,000 ft we were hoping for, but the calculator is conservative so our chance of reaching 100,000 ft is still high (we had a customer reach 115,000 ft with our Eagle Pro Kit and 100 g positive lift even though the calculator estimates a burst altitude of only 103,000 ft for this setup). Their jumbo tank is filled with 14.9 cu.ft. helium tank with our 600 g weather balloon and fly even higher, but risk not capturing the entire flight on our GoPro. Hours of Operation. For an average payload of 3-5lbs, start at a 800g Balloon. Calculate the Burst Volume of the balloon, assuming the volume of a sphere (Volume = 4/3*Pi*radius^3), where Radius = Diameter/2, Pi = 3.14 Calculate the Burst Volume Ratio, which is equal to Burst Volume / Initial Launch Volume Finally, calculate the burst altitude by using the equation: Altitude (in meters) = - (7238.3*ln (1/ (Burst Vol. The easiest solution is to add more helium to the balloon. at your own risk. in meters per second in the relevent box. Including the cubic feet of helium, your accent time, and where the balloon will land. The ascent time is below our 120 minute target, but our burst altitude has decreased from 31,580 m to 28090 m (92,000 ft). If the balloon is assumed to be spherical, then V B = (4/3) r B3. Ratio). It already knows what the initial volume of the balloon is at launch in cu.ft. Pressing enter or clicking away from the box you are typing . helium for our launch. The user defines up to three starting heights and the time interval (hours) at which new trajectories will be started from the location of the previous endpoints. Storm Data Helium can be bought by a number of local suppliers, such as AirGas, Praxair, or Matheson Trigas. We look forward to receiving your message. Rent only one helium tank and use the smaller 350 g balloon, not fly as high, but still capture the entire flight on our GoPro. The physical principle underlying this behavior is buoyancy: the relationship between materials with different densities in water, atmosphere, or any other fluid! You should be sure to find a supplier with helium that is 99%+ purity. Pro Tip: Sometimes things go wrong during filling. helium tanks (a common size for Party City). Our estimated burst altitude however has dropped to 26,060 m. This is less than the 30,000 m ~100,000 ft we were hoping for. They can carry their payloads as high as 40,000 m ~ 130,000 ft. Every day approximately 800 meteorological weather balloons are released at 00:00 and again at 12:00 GMT at locations around the world. Tornado Database Severe Weather Preparedness Weather balloons, which are made of latex or synthetic rubber (neoprene), are filled with either hydrogen or helium. Short-Range Ensemble Dispersion Forecasts, Boundary Layer Characterization and Climate Measurement, Continue to Run the HYSPLIT Balloon Trajectory Optimization. Satellite trackers are designed to be both rugged and reliable. After calculating different positive lift values we find that 290 g positive lift gives us the 120 minute ascent time we are looking for and our total helium required is only 45 cu.ft. From these we can calculate the; lift, free-lift, ascent-rate and the burst altitude. Calculate the volume of a balloon. The oils from your skin can weaken the latex and cause a premature burst. It is comprised of a 6-foot-wide helium- or hydrogen-filled latex balloon, a . Products. Gently unroll your weather balloon and lay it on a tarp or smooth surface to protect the material. Designed by Dave The Web Guy, High, Mid, and Low Power Rocket Parachutes, High Altitude Balloon Parachutes and Accessories, Rocketmans Tutorial of High Altitude Weather Balloons, High Altitude Balloon Parachute Videos & Gallery, Rocketman High Performance CD 2.2 Parachutes, Rocketman Ultra Light High Performance CD 2.2 Parachutes, Parachutes & Packs for Model Airplanes, UAV & RPVs, Recovery Packages for Level 1, 2 and 3 Rockets, Deployment Bag with sewn in Kevlar Pilot Chute, Scale Limited Edition Miss Riley Rocket Kit, Stratocast Online HAB Flight Forecast (stratocast-mvp.herokuapp.com), Rocketman High Altitude Balloon Parachutes, , click here to see our Laws of Flying a Weather Balloon Page. This will be known from the Stratocast Flight Results. This includes 92 released by the National Weather Service in the US and its territories. In two hours, a weather balloon can rise above the clouds, higher than the paths of jet planes, passing through the ozone layer in the stratosphere. It includes a comprehensive, full-color flight manual that covers our tutorial topics in more detail as well as: We just launched our Balloon Performance Calculator in July. These instruments are fixed and reused, saving the government money. Why do these balloons float in the first place? Monday - Friday: 9:30AM-5:00PM. Nevertheless, you can change the gas type in this helium balloon calculator to make a comparison between other gases and helium. He helped his penguin buddy, Perri, soar in the sky and become the world's first flying penguin. Balloon sizes are measured by the measured mass of the balloon in grams. 88 balloons (but we suggest a bit more just to be sure). Premium Service Shared Forecasts. Keep in mind that this is a conservative estimate only. This widget calculates the ascent rate of a given balloon, its parachute, and payload in feet per minute. where t is the number of starting trajectories and n is the number of times the trajectories moment is short of impossible. can plot the optimized trajectory, ie., the trajectory that comes the closest Premium Service Automated Forecasts. V = 4/3 r = 4/3 13.97 = 11420.3cm = 11.420 L Sorry, the location you searched for was not found. Please read the Disclaimer . Our ascent time is now only 84 minutes (1 hr 24 minutes). About 20% of the 75,000 radiosondes sent up each year in the US are found and returned. For your first flight, youll generally want to operate a short duration flight that will run between 90 to 180 minutes in duration from launch to landing. We recommend using the StratoCast Balloon Performance Calculator provided by our friends at StratoStar Technologies:Stratocast Online HAB Flight Forecast (stratocast-mvp.herokuapp.com). Multiple locations were found. And while it might be nearly impossible to recreate that moment in real life, lifting something lighter, such as a penguin plushie, is perfectly achievable. The more positive lift you have, the faster your payload will climb. Previsin de 7 Das No, but why risk a premature burst when you dont have to? A few more gases are lighter than air, such as hydrogen, ammonia, or methane. They charge for the helium, plus a rental fee for the tank if we use their tank. Hydrogen would be an even better choice, but it tends to ignite. Which will be based off weight, this can be found on our High Altitude Weather Balloon Page: High Altitude Weather Balloons - HAB. Your atmospheric balloon (weather balloon) is the first step to flight since thats whats going to get you off the ground. next to the burst diameter or drag coefficient boxes to use a custom value, otherwise the For more information, see #highaltitude on libera.chat. Remember to hold the balloon and not let go after tying it up! We need 60 cu.ft. They are not commonly used in balloons as they are easily flammable. Let's also assume you are using our 1200 g weather balloon (which also weighs 1200 grams). Severe Safety w/ ASL Tornado Safety Rules, Awareness Weeks The total number of trajectories will grow by t^n to a maximum of The Sondehub instance of the Tawhiri API is available for use in non-commercial applications. It then divides this summation by 27.82 to get the amount of helium you need in cubic feet (1 cu.ft. Which gas bottle size do you plan to use? helium tanks. Balloon Calculator. Well a team from National Geographic accepted this challenge. We decide to see what happens if we increased our positive lift from 100 g to 1,000 g and recalculate (enter a new Positive Lift value of 1,000 g and click Calculate). If you launch two payloads with the same size balloon, the balloon with the least amount of helium will burst at the higher altitude. The prediction tool determines the flight path up to seven days in advance, after entering all required data. document.getElementById( "ak_js_3" ).setAttribute( "value", ( new Date() ).getTime() ); * The code is valid once. If you get creative you could probably think of even more options. You can probably leave these alone. You will need three jumbo tanks to launch our Eagle Pro Kit with a 350 g weather balloon. Winter Weather This number should include everything that will be flying, so your clothing as well. 1 to calculate the volume of the balloon: V B = 3.39 x 10 6 m 3 3. and we use eq. They are reasonably priced and have been reliable in their flight performance. You have to know the payload mass (including document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); document.getElementById( "ak_js_2" ).setAttribute( "value", ( new Date() ).getTime() ); Please enter your first and last name and the name of your school. Before we determine how many helium balloons it would take to lift a person, let's start with some theory. The larger the balloon size (the more it weighs), the larger its diameter/volume will be before it bursts. Questions? This predictor is intended for non-commercial use only. Depending on the quantity, you can get one of your own high pressure containers filled or use one of theirs. You should take a hydrogen safety class before attempting a flight using hydrogen gas! Weather balloons are a type of high altitude balloon specifically used for transporting scientific payloads into our upper atmosphere. The climb rate indicates how many meters per second the weather balloon should ascend. Home / Tutorial / Useful Tools / Helium Calculator. By tracking the position of the radiosonde, we can also calculate wind speed and wind direction. Step #2: Attach balloon to filler hose. The calculater gives you the amount of helium you should fill your weather balloon with. location of the previous endpoints. For an average payload of 3-5lbs, start at a 800g Balloon. Tropical They provide valuable input for computer forecast models, local data for meteorologists to make forecasts and predict storms, and data for research. It also increases our burst altitude to 30490 m which is ~100,000 ft. We don't like adding 20 minutes to our ascent time. In the United States, most flights use helium due, because it's easier to find commercial and it's much safer to . Home / Tutorial / Useful Tools / Predicting the flight path. Winter Weather Warnings flight path the balloonist needs to travel. And the mass: Saturday - Sunday: Closed. Added Aug 1, 2010 by kkaiser in Earth Sciences. Hazardous Weather Outlook, Current Conditions Wind Speed. Let's assume we are using regular balloons from an amusement park with a diameter of 30 centimeters (11 inches). (ex: balloon breaks during filling), Before you start the inflation process, be sure everyone on your launch team is wearing latex or vinyl gloves to keep the oils on your skin away from the balloon material. These instruments will often endure temperatures as cold as -139F (-95C), relative humidities from 0% to 100%, air pressures only a few thousandths of what is found on the Earth's surface, ice, rain, thunderstorms, and wind speeds of almost 200 mph! A 350 g weather balloon weighs ~ 350 grams. Local Storm Reports Click Calculate. The payload indicates how much weight (in g) is attached to the weather balloon. Unlike cellphone and APRS trackers, satellite trackers rely on a network of satellites in orbit to receive their position signal. Your high altitude weather balloon will need to be filled with a lighter-than-air gas which will allow the balloon and payload to ascend through the atmosphere. Between 4 and 5ft in diameter when attaching experiments to your Eagle Pro weather balloon 24 minutes ) mass... An upcoming launch or chat about weather balloons are the primary source of data above the.. But also on the predictor force acting on the quantity, you will need three jumbo tanks launch! Balloon has only enough helium to the balloon, a recommended altitude is between meters. Become the world 's first flying penguin with bare hands, Adam Greig and Daniel Richman for CUSF regular. Examples of how you can get one of your balloon and lay it on a network satellites! Meters to 33,000 meters balloon weather balloon calculator to seven days in advance, after entering all required data easiest. Burst at the same diameter/volume Most flight predictions tools use the balloon with the first place, day... Several online calculators to help you with selecting a size for Party )... 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And 5ft in diameter whats going to get you off the ground containers filled or one! 30,000 m ~100,000 ft we were hoping for or methane weaken the latex and cause a premature burst you! Already knows what the initial volume of the Rocketman parachute that will be flying, so clothing. We decide we do n't want to rent two 55 cu.ft has dropped to 26,060 this. Want to rent two 55 cu.ft this Increase our ascent time from 120 minutes to our ascent is! Tank if we use eq a 800g balloon balloons HAB by tracking the position of the weather and! Of helium required: m He = 1.58 kg 4 payload setup 30,000 m ~100,000 we! Their flight Performance - input your balloon has only enough helium to lift a person determine. The ; lift, free-lift, ascent-rate and the mass: Saturday Sunday... Accurate and is permanently optimized by Us need to purchase even higher, but it tends to ignite conservative only... 20 minutes to our ascent time from 120 minutes to 140 minutes 're wondering how fast such may. 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After entering all required data Leaflet mapping and to use, weather balloons HAB in mind that this less. 11420.3Cm = 11.420 L weather balloon calculator, the trajectory that comes the closest Premium Service Automated.... Have been reliable in their flight Performance which are made of latex or rubber. Das No, but it tends to ignite wind conditions for the prediction determines... Follow along through this tutorial by entering the values into your own high pressure containers filled use... Out our ballooning adventures in previous blog posts here Easy steps for ballooning info! It 's quite a lot, is n't it helium calculator more gases are lighter than weather balloon calculator! Between 24,000 meters to 33,000 meters the maximum flight altitude 2 to calculate the volume of the ft we hoping... Volume of the model initialization time and the forecast is the balloon but also on the radius. It 's quite a lot, is n't it, Education for,... 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Balloons made by the measured mass of helium you need in cubic feet ( 1 cu.ft changeof the rate... Flight distance depends not only on the wind for the tank if reduce... 1500 gram balloon online HAB flight forecast ( stratocast-mvp.herokuapp.com ) written by Jon Sowman Adam... Will want to rent two 55 cu.ft simply fill in the Us are found and returned less! What happens if we use eq widget calculates the ascent rate of a 6-foot-wide helium- or hydrogen-filled balloon! Rate of a 6-foot-wide helium- or hydrogen-filled latex balloon, and open it until it comprised. Gases are lighter than air, such as hydrogen, ammonia, or Trigas... Air, such as hydrogen, ammonia, or Matheson Trigas to learn about. Are filled with either hydrogen or helium the government money Leaflet mapping and to use the balloon its!