Unlike semi-rigid and rigid airships (e.g. Zeppelins), blimps rely on the pressure of their lifting gas (usually helium, rather than flammable hydrogen) and the strength of the envelope to maintain their shape.
A blimp with too long a hull may kink in the middle when the overpressure is insufficient or when maneuvered too fast (this has also happened with semi-rigid airships with weak keels).
[7] Yet a third derivation is given by Barnes and James in Shorts Aircraft since 1900: In February 1915 the need for anti-submarine patrol airships became urgent, and the Submarine Scout type was quickly improvised by hanging an obsolete B.E.2c fuselage from a spare Willows envelope; this was done by the R.N.A.S.
at Kingsnorth, and on seeing the result for the first time, Horace Short, already noted for his very apt and original vocabulary, named it "Blimp", adding, "What else would you call it?
"[8] Dr. A. D. Topping researched the origins of the word and concluded that the British had never had a "Type B, limp" designation, and that Cunningham's coinage appeared to be the correct explanation.
In 1918, the Illustrated London News said that it was "an onomatopœic name invented by that genius for apposite nomenclature, the late Horace Short".
This was followed by then-Lieutenant John H. Towers, USN, returning from Europe having inspected British designs, and the U.S. Navy subsequently sought bids for 16 blimps from American manufacturers.
In 1930, a former German airship officer, Captain Anton Heinen, working in the US for the US Navy on its dirigible fleet, attempted to design and build a four-place blimp called the "family air yacht" for private fliers which the inventor claimed would be priced below $10,000 and easier to fly than a fixed-wing aircraft if placed in production.
[14] This blimp is a type of airborne early warning and control aircraft, typically as the active part of a system which includes a mooring platform, communications and information processing.