This Frequently Asked Questions (FAQ) list is not intended to be all-inclusive, but it will enable you to sound like you know what you're talking about if you should ever book a flight, go to a rally, or be a spectator at a launch or landing site.
Frequently Asked Question | Glossary | Home| Student | Teacher
What are balloon baskets made of?
The walls of the basket are usually woven from rattan wicker.
Rattan wicker is used most often for the basket walls because it is light
in weight while at the same time being strong and flexible.
However, other materials have been used in the construction of basket
walls including wood, aluminum, and fiberglass. Most baskets also
contain a support framework made of wood, aluminum, steel, cable, rope,
or a combination of these materials. Baskets are designed so that
the weight inside the basket, i.e. fuel tanks and passengers, is transferred
directly to the load tapes or ropes of the envelope.
What are balloon envelopes made of?
Rip-stop nylon is the most common material. Polyester and other fabrics
are sometimes used. The lower portions around the opening are usually made
from a fire resistant material like Nomex, similar to what race car drivers
and firemen wear.
What fuel does hot air balloons use, and where is it carried?
Propane is used for fuel. It is carried in aluminum or stainless steel
tanks that range from 10 to 20 gallons in size. Average fuel consumption
is about 15 gallons an hour.
What are the ropes for?
The crown line on top of the balloon is used to stabilize the balloon
during inflation. "Tether lines" are used to tie the balloon down for display
purposes. A "drop line" is sometimes released by the pilot just before
landing so the ground crew can pull the balloon to a desired location.
Is it cold up there?
Yes and no, on average the ambient air temperature decreases at a rate
of about 2°C for every 1000 feet in altitude increase within the troposphere.
So on average the air temperature would be 6°C colder for folks flying
in a balloon at 3000 feet above the ground versus the temperature on the
ground. However, due to something called a temperature inversion, it can
sometimes be warmer at that same 3000' than on the ground. Temperature
inversions mostly occur during the winter on clear, cold, calm nights.
How hot can it get inside the envelope?
The temperature inside of a balloon envelope can vary due to a number
of different factors. Most balloons have a maximum allowable temperature,
red-line temperature, determined by the manufacturer. In general the red-line
for a nylon balloon is 275°F and the red-line for a polyester balloon
is 300°F.
How does a pilot steer a balloon?
A balloon does not have a steering wheel. A balloon goes where the winds
blow it. However, the wind doesn't blow in exactly the same direction at
every height. In fact the wind at different altitudes may blow in so many
different directions that a balloon can go in any direction that the pilot
wants. The balloon can even return to the place from which it took off,
this condition is known as a box wind. Therefore, a balloon pilot can steer
a balloon, within the confines of the wind conditions at the time, by ascending
and descending to different altitudes in order to pick up the available
wind directions.
How does a balloon get back to where it took off from?
With the exception of a box wind condition, a balloon will land somewhere
downwind from where it took off. Because of this, balloonists utilize what
is called a chase vehicle.
Where do balloons land?
This is a very common question and a very important one. It brings up
many issues that are important for balloonists, such as land owner relations.
With the exception of a box wind condition, a balloon will land somewhere
down wind of where it took off. The landing spot can be any open area big
enough bring the balloon into. The size of the area needed to land a balloon
depends on the size of the balloon and the weather conditions at the time.
The faster the wind is blowing, the more space is required to land a balloon.
In calm conditions, the area can sometimes be no larger than the balloon
itself. Balloons have landed in parking lots, golf courses, fields, ball
parks, schools, back yards, front yards, streets, roads, and even parks
to name just a few. A balloonist will try to pick a location that has easy
access for the chase vehicle and is free of obstructions, (e.g. power lines
and trees) although this is not always possible.
How large are balloons?
Balloon size refers to the volume of air that the envelope will hold
when fully inflated. Size is measured in either cubic feet or cubic meters.
Manned balloons range anywhere from around 12,000 cubic feet for a small
single person balloon to many hundreds of thousands and even millions of
cubic feet for the largest balloons.
How long do balloon flights last?
A typical morning or evening balloon flight lasts about one hour.
Depending on conditions such as wind, weather, daylight, and the availability
of good landing spots a flight can last anywhere from a few minutes to
up to two hours.
How long do balloons last?
Depending on the care it is given, a balloon envelope may last 500 or
more flying hours. Considering that most sport pilots fly from 35-75 hours
a year, balloons do last a long time.
What instruments do balloons have?
All hot air balloons carry these three instruments are an altimeter,
a variometer, and a pyrometer.
Are all hot air balloons alike?
All hot air balloons consist of a burner system, a basket and an envelope.
The differences are in the shape and size of the envelope, the deflation
system, the basket shape, design, and configuration, and number of burners.
How do balloons fly?
The balloon's burner is used to heat up the air that is inside of the
envelope. Air that is heated will expand and become less dense. Since heated
air is less dense, the air inside the envelope will weight less than the
ambient air. Once the weight of the entire balloon system, including the
fuel and passengers, is lighter than the surrounding air that it displaces
the balloon will lift off of the ground and begin to fly.
How long does it take to inflate and deflate the balloon?
A good ground crew can inflate and launch a balloon in fifteen minutes
or less. It takes about the same amount of time to deflate and pack up
the balloon after the flight.
How do you get back to where you started?
A chase crew follows along in a van or truck. The chase crew is in radio
contact with the pilot, so they can be there when the balloon lands (or
soon afterwards).
How much do balloons cost?
The most popular sport size balloons cost from $18,000 to $25,000 or
more. Support equipment (radios, fan, extra tanks, tools, repair kit, etc.)
adds from $2,000 to $ 5,000 more. You can also buy used balloons.
How many hot air balloons are there?
There are over 3,500 balloons and 4,000 licensed pilots in the U.S.
There are another 1000 or so balloons in other countries.
Can I smoke in or around a hot air balloon?
It's not advisable because of the possibility of propane fires or explosions
from leaks.
How do you light the burners?
Usually with a striker similar to that used by welders to light their
welding torches. Some burners have built-in piezo-electric igniters. Once
lit, a pilot light keeps the fuel burning.
Do you need a license to fly a balloon?
Yes. A Balloon Pilot Certificate is issued by the Federal Aviation Administration
in the USA. You must pass an FAA written exam, obtain a prescribed number
of hours of instruction, make a solo flight, a flight to a specific altitude
and pass a flight test. You don't have to be able to fly an airplane since
it is a completely different type of aircraft, although many balloon pilots
also fly other types of aircraft like airplanes and helicopters.
How old do you have to be to fly a balloon?
To obtain a Private Pilot Certificate in the USA you must be 16 years
old. And would you believe that there are balloonists flying in their 80's!
Can balloons fly at night?
Yes, although balloonists seldom do because of decreased visibility
and the requirement for instruments and lights. Most balloons are certified
for day flying only.
What are the differences between gas and hot air balloons?
A gas balloon is completely enclosed and is filled with helium or hydrogen.
A hot air balloon gets its lift from heating the air within it.
Can balloons fly over mountains?
Yes. However, there are some special problems: If you come down in an
area where there are no roads it is difficult to get the balloon out Also,
mountain winds are sometimes very turbulent.
When do balloons fly?
Balloons generally launch at sunrise, or in the last couple hours before
sunset. The primary reason for this is that winds through the middle part
of the day are often unsuitable for safe flying. Additionally, the mid-day
sun's ultraviolet rays can prematurely degrade the chemical coating which
is applied to the envelope during manufacture.
How high do you fly?
While it's possible to go as high as 12,000 feet without carrying oxygen,
the typical sport or commercial pilot usually flies anywhere from treetop
height (over uncongested areas) to about 5000 feet.
What kind of weather can you fly balloons in?
While it is possible to fly in winds of 10 knots or more, it's not particularly
safe to do so. Generally, it is preferred to fly when surface winds are
10 knots or less. Winds of 5-8 mph are ideal. Another weather consideration
is the speed of the winds aloft, up to about 9000 feet. If they are coming
from varying directions at different altitudes, we have more "steering"
capability, but again, speed is a factor, and we'd probably decline to
fly if the winds aloft were in excess of 15-18 knots (about 20 mph). To
fly a balloon a minimum of three miles visibility is needed, but seven
or more is much preferable. Excessively hot days can make for uncomfortable
flying, and also shorten the flight, since the warmer it is, the more quickly
fuel is consumed.
Is ballooning safe?
Statistics have shown ballooning to be the safest segment of general
aviation. The two most significant hazards are poor pilot decisions and
contact with power lines. Providing that the aircraft is properly maintained
and that the pilot is prudent in his/her decision-making process and proficient
in piloting skills.
What if I'm afraid of heights?
Because there is very little sense of motion in a balloon, many people are able to overcome their fear of height. Rather than looking down, the natural reaction is to look "out" at the horizon and, because the balloon is moving relatively slowly, you probably won't react the same way you would in an airplane.
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