Historic aviation engineering is very much a male dominated world so Mrs Black says she sometimes gets some surprised responses, but that her passion is just as strong.

"Yes, particularly because I'm a woman. But it's something you feel the passion in your heart for them, you can't help it," she says.

After some careful work the two wings are finally attached and the DH9 is sitting smartly in the hangar.

The mahogany wing struts look like examples of fine furniture and not the bracing joints of a military bomber.

Carl Warner is a historian at the Imperial War Museum and he explains the significance of the DH9 in annals of aviation history.

"Well 1917 marks a really important period for the Royal Flying Corps, the Royal Naval Air Service and aviation in general. It's a year where there's still this incredible arms race between the development of German aircraft and British aircraft and it's a year when the roles of aircraft are very much set. So we have the fighting scouts, we have the fighters in the sky able to knock out other aircraft, we have reconnaissance aircraft and of course we have this new generation of bombing aircraft, so they're not simply being designed to support the battlefield, to support ground operations they're being designed to take the war to the enemy so to go beyond the battlefield and that's very much the start of this idea that the bomber will always get through and that preoccupation that moves through into the 20s and 30s and 40s as to the awesome power of the bomber and it's really led by aircraft that do that strategic bombing work like the DH9," he says.