SILVERSTONE, England - Formula 1 today (July 4 2014) witnessed a woman driver, after a 22-year wait, taking part in a GP weekend. But only for 20 minutes.If Susie Wolff, whose husband Toto is head of Mercedes motorsport, was bitterly disappointed to have her British GP session cut short by engine failure she refused to dwell on her misfortune.The Scot will get another opportunity with her Mercedes-powered Williams team in Germany later in July 2014 and is still not giving up on her dream - admittedly still no more than a long shot - of becoming Formula 1's first woman racer since 1976.'ONE MORE SHOT'"That's racing," she told reporters in the Williams motorhome. "I've known over the years that it can be massive ups and then massive downs. I've still got Hockenheim. I've got to go out in Hockenheim and show what I can do because I didn't get the chance to do that today."I've still got one more shot at it, so head up high."On one level, at least, Wolff's mere four laps at Silverstone partially achieved at least one aim - to give young girls a role model and someone they can aspire to emulate in a sport dominated by men. Until Friday, no woman had taken part in any stage of a GP weekend since Italian Giovanna Amati tried and failed to qualify for Brabham in 1992.Italian Lella Lombardi, in 1976, remains the most recent woman to race in F1, even if there have been several in other series - notably in the US.STRAIGHT-LINE TESTSWolff added: "If there's no role model out there doing it, for all the little girls who come to race tracks to watch or watch it on the TV, if they don't see a girl out on the race track then they are not inspired to maybe want to do that themselves."And that leads to the second problem that there are not enough young girls karting or starting at a young age... sometimes in life you also just need a chance and I got that chance here at Williams."Wolff took part in straight-line tests and drove in the simulator and showed sufficient potential and persistence - even if there will always be those who point to her husband's influence - to be handed a one-off test in 2012.That in turn led to a young-driver test at Silverstone in July 2013, putting her on track at the same time as other race regulars, and an enhanced role in 2014 with two Friday practice sessions thrown in."Sometimes in life you just need that chance and it's up to you to grab that chance with both hands and make something of it," said the Oban-born driver who started racing under her maiden name of Stoddart.'NOT YOUNGEST, NOT OLDEST'At 31, Wolff is aware that time is against her if she is to break down more barriers, but the Scottish lass who spent seven years in the German Touring Car championship argued that she still had everything to aim for."Sometimes a lot is made of my age but I would never have been ready for this chance in my early 20's," she said. "For me everything has been working up to this point, to be ready to drive an F1 car."I'm conscious that I'm not the youngest but I'm also not the oldest. I've always said that I will keep going as long as I can see a path and an opportunity to achieve. As soon as I see there is absolutely no chance, I will be the first to turn around and say 'time to move on'."Hockenheim is a track she knows well from German Touring Cars and she hoped that would enable her to showcase what she could offer. She declared to a throng of reporters: "I really want to use that opportunity to show, not to speak to everybody and say 'I can do it' but I want to show it. I think actions speak louder than words. "You can't expect to be on the grid unless you show you are good enough to be on the grid. I am well aware that there are many talented drivers fighting to be on that grid."Until I've done a good job in Hockenheim I'm not willing to say too much about the future."