In May 1906, work as started on a third airship, LZ 3. This was the same size and configuration as LZ 2, but had a greater gas capacity. Finished by the end of the year, it made two successful flights at a speed of , and in 1907 attained a speed of . The success of LZ 3 produced a change in the official attitude to his work, and the Reichstag voted that he should be awarded 500,000 marks to continue his work. However the purchase by the Government of an airship was made conditional on the successful completion of a 24‑hour trial flight. Knowing that this was beyond the capabilities of LZ 3, work was started on a larger airship, the LZ 4. This first flew on 20 June 1908. The final financial breakthrough only came after the Zeppelin LZ 4 was destroyed by fire at Echterdingen after breaking free of its moorings during a storm. The airship's earlier flights had excited public interest in the development of the airships, and a subsequent collection campaign raised over 6 million German marks. The money was used to create the 'Luftschiffbau-Zeppelin GmbH' and the Zeppelin foundation ("Zeppelin Stiftung").