Ella supported her brother's passionate interest in aeronautics which, she remembered, he had had since childhood. At Byres Road they kept birds in order to observe them in flight and landing. Percy followed the experiments of German pioneer glider
Otto Lilienthal closely, and made scale models of gliders which he would fly around the apartment. In early 1895 the siblings decided to make a full sized prototype of what they called a 'soaring machine'. Percy did the design, carpentry and tensioning. Ella was in charge of the fabric. They moved house to Kersland Street, Glasgow (the landlady at Byres Road objected to the birds and the models), and began constructing the aircraft in five sections. They used the best materials they could get with their limited funds: pine, sailcloth, steel plates, piano wire and bamboo. It was difficult to lay out the fabric in order to cut and sew it at home, and they were lent a room at Glasgow University by its principal, the physicist
Lord Kelvin, despite his friendly scepticism towards aeronautical progress. Ella was helped by Iris Biles, the daughter of the professor Percy assisted.The demonstration also saw a (possibly unplanned) flight by Dorothy Rose Pilcher, Ella's cousin, who was given a tow by Percy but then crashed into the cinematograph camera which had been set up to take stills of the glider in flight. Neither the aviator nor the apparatus was damaged. While it did not yield an investor, the demonstration was impressive enough for Percy to start up a company with a colleague,
Walter Gordon Wilson. At this point Ella probably stepped back from her role as Percy's collaborator, and may have begun training as a nurse. Nonetheless, she still accompanied Percy on his most important trial flights, and helped him prepare for lectures. In the late summer of 1899 another demonstration was planned, at
Stanford Hall in Leicestershire, for the benefit of prospective investor
John Henniker Heaton and a few others. Despite bad weather, Percy insisted on making a flight in the Hawk and suffered an accident. He died from his injuries three days later, Ella at his side. Within a month Ella had embarked for Cape Town to serve as a nurse in the
Second Boer War. Five weeks later, she was voted an honorary member. == Later life ==