Sophie's engine is warming up and her propellers start to turn as she prepares for take off.
There's no hiding the delight in the faces of the team who have put years of work into finally getting her off the ground
The ambitious project by the Aviation Preservation Society of Scotland was not something that could be rushed, according to chairman Mike Harper.
He said: "Every single nut and bolt has been checked, every single bracket has been checked, every single piece of wire has been checked. You don't cobble these things together.
"When you're going to fly it, it has to be done right. If it was for a museum, if it was just going on display we would probably have finished it within a few years.
"But the meticulous attention to detail to get this thing in the air is what's taken the length of time. Who can say they've achieved this sort of thing, a bunch of guys who've retired?"
The team – whose oldest members are in their 80s – have followed the exact plans of the original Sopwith 1 1/2 Strutter – which came into service in 1916. The plane was involved in protecting the Forth coastline in World War One.
Recreating the Strutter involved using the talents of many people, including relative newcomer Donald Gardner.
"It's a fantastic bunch of people, with a huge range of skills from craft skills to engineering skills," he said.
"It's kind of humbling seeing the results of all the work everybody's put into it over, I guess, a generation. Also it's a bit sad that in the back cockpit there's a plaque to all the people that were involved at the start that haven't unfortunately been here at the end. That's quite humbling."
Even on a sunny day, the team has to be very careful about the conditions, especially the wind.
Aircraft inspector Tim Rayner is also the solo pilot and these test flights are allowing him to get used to the feel of the aircraft and how she reacts in certain weather.
He finds a decent window for take-off and the plane leaves the ground.
