temperature of hot air balloon?

Question

according to contemporary records, the Montgolfier hot air balloon-the first man made flying machine-had a volume of about 2000m^3 and weighed 780kg. on its maiden voyage, it carried two people. estimate the temperature to which the air inside the (rigid) balloon had to be heated in order to achieve lift-off.

Answer 1

was my last answer incorrect? If so , add the weight of two people ( say 150kg) to original mass as I assumed they were included

Answer 2

easily conversing, i'm no longer as affected person as you, to look at a number of those issues... I only can tell the respond. My answer is specific. Its an inclination of a warm air to upward thrust.. this does not propose that it will no longer upward thrust if the encompassing air is of the comparable temperature. whilst its surrounding temperature is of the comparable temperature, there may be no flow of warmth, for this reason the temperature will stay consistent. this might save the nice and cozy air arised. If the temperature around it cools down, there may be a flow of warmth, which will quiet down the air, for this reason sinking it.

Answer 3

"the balloon can be controlled by changing the temperature of the air inside the envelope. The pilot may open one or more burner blast valves to increase the temperature inside the envelope creating hot air to rise the balloon and loads"

so there is really no gauge on the temperature in a balloon you'de have to research it a bit more i think!