Differs from other standard types, in that only one ballonet being fitted, an elevator is introduced under the bow.
Her main feature is that she has a ballonetat each end.
This class rise with the forward ballonet empty, and inclined up by the bow.
The balloon frame was divided into seventeen compartments, each of which held a ballonet filled with hydrogen gas.
An internal sack or ballonet into which air might be pumped to replace any lost gas, and maintain the shape of the balloon.
The immediate cause may have been a leaky valve permitting the gas to escape, or a faulty air-pump which made prompt filling of the ballonet impossible.
The air pump, which should have pumped the ballonet full of air to keep the balloon rigid failed to work.
In the kite balloon, the ballonet serves the purpose of a rudder, filling itself through the opening being kept pointed toward the wind--there is an ingenious type of air scoop with non-return valve which assures perfect inflation.
If any considerable amount of gas should be vented, to produce quick and rapid descent, the pumping of air into the ballonet maintains the shape of the balloon and also facilitates the descent.
Ballonet capacities may run up to one-fifth the gas volume.
After some elevation is attained, the forwardballonet is also filled.
Besides this, if the pressure in the air ballonet be initially somewhat greater than that of the external atmosphere, a considerable ascent may be produced by merely venting this air ballonet.
In the more common form of balloon, the internal air ballonet is empty, or nearly so, when the main envelope is full.
The Ballonet The present standard method of improving altitude regulation involves the use of the ballonet, or compartment air bag, inside the main envelope.
Each ballonet is theoretically proof against leakage--in practice there is an almost inappreciable porosity, which hardly counts for a comparatively short period, say a month.
The buckling of the aluminium envelope resulted in ballonet after ballonet collapsing under the pressure of water.
It appears to be rearing up on end, as if the extremity saddled with the ballonetwere weighted.
If ascent is required, the after-ballonet is inflated, thereby driving the gas to the forward end of the balloon, the buoyancy of which is thus increased.
If it is desired to descend the gas is driven from the forward to the after end of the envelope, merely by inflating the bow ballonet with air by means of a pump placed in the car.
The wind blowing against the opening, which faces it, charges the ballonet with air.
The envelope contained a singleballonet for regulating the pressure of the gas.
To ensure that this is always done the ballonet valves are set to open at less pressure than the gas valves.
The supply of air for filling these is taken from the propeller draught by a slanting aluminium tube to the underside of the envelope, where it meets a longitudinal fabric hose which connects the two ballonet air inlets.
On making a second ascent, as the airship rises the air must be let out of the ballonetinstead of gas from the envelope, and by the time 1,000 feet is reached the ballonets will be empty.
One ballonet was contained in the envelope which, at first, had three inflated fins to act as stabilizers.
These inflated fins, while acting as a rudder to hold the balloon steady in the air, do not offer the resistance that was caused by either the flat fins of the Goodyear model or the open-mouthed steeringballonet of the old type.
Dupuy foreshadowed the construction of the modern dirigible air-ship by inventing a system of suspension links which connected the car to the envelope; and he also used an internal ballonet similar to those described in Chapter X.
To secure the necessary inclination of the balloon while in flight, air can be transferred from one of the compensators, say at the fore end of the ship, into the ballonet in the aft part.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "ballonet" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: airship; balloon; blimp; parts; ship
