As the months passed by the aviation company found it harder to secure customers. Flying in South Australia was losing its appeal as a novelty without yet being strong enough to succeed as a commercial enterprise. Despite efficient administration and Harry’s personality and talent, it was apparent to both Butler and Kauper that their company could no longer provide sufficient livelihood for the two partners. Profits were still in hand and they chose voluntary liquidation in preference of waiting for a painfully drawn-out collapse. Not the slightest blame could be attached to anyone concerned for the closing of the company on September 24th, 1921.
However, Butler’s faith in aviation was unshaken, and he purchased the two aircraft and other machinery assets to carry on the same business on his own account.