Cause of crash that killed Sean Edwards and injured Will Holzheimer at Queensland Raceway still unknown THE family of a young Porsche driver who survived the crash that killed British racing champion Sean Edwards say he still can't talk to tell them what happened. Will Holzheimer, 22, is expected to recover from broken bones and internal injuries after undergoing surgery in Royal Brisbane and Women's Hospital. Sean Edwards killed in Queensland Raceway smash His father David said Mr Holzheimer was not burnt when his 996 series Porsche GT3 exploded into flames after missing the final turn at Queensland Raceway, ploughing into a barrier at a speed of 200km/h. The crash killed Edwards - an accomplished Porsche race car driver and son of Formula 1 legend Guy Edwards - who was coaching Holzheimer. Yesterday, his father said Holzheimer hadn't been able to tell them what had happened. He's in a stable condition ... we're hoping for the best, and one thing I would probably like to say is he has no burns at all. Father David Holzheimer visits his son Will at Royal Brisbane and Women's Hospital yesterday. Pic: Liam Kidston. David Holzheimer runs civil construction company Frostdale which sponsors the Holzheimer-family-owned Dellow Racing. Members of Queensland's motorsport community described Holzheimer as a competent driver whose father had ensured he had all the training to negotiate a racetrack. They said it was hard to see how driver error could have been the cause of the car failing to slow or turn. Champion racing driver Paul Stokell, who runs a performance driving school, took Holzheimer through a series of courses in his Porsche. "He's done everything from advanced car control, performance driver training on track and pretty much race driver training," he said. He definitely has the experience ... it doesn't sound to me like driver error. Former Porsche Club Queensland motorsport director James Austin said: "He definitely has more skill than the average punter." Ipswich police Inspector David Preston said they had not found anyone with crash footage. Tributes continued to roll in for Edwards. "Our thoughts are with his family - we want to express our deepest condolences to his relatives," Hartmut Kristen, Porsche's Head of Motorsport said. His mother Daphne McKinley told the British press: "It's a mother's worst nightmare." "You expect it on the track, but not in that way, I believe it was the last corner of the track and the session," she said. The mangled wreck of the Porsche. Picture: Ten Eyewitness News It's a mother's worst nightmare. It's what you never want to happen, for your children to die before you. The loss to us is unfathomable. I haven't just lost a son, I have lost a great friend. She said her son had told her only days before the trip how much he was looking forward to mentoring young Australian drivers. I said to him just a few days before 'why are you going to Australia to do a lesson? You are winning the championship. You don't need to go'," she told The London Evening Standard. And he said, 'well Mum, I love mentoring'. He loved bringing on young drivers though the ranks, and he died doing it. She spoke of a talented young man who will be missed by many. "He was an inspiration," she said. He was just an extraordinary, intelligent and wonderfully talented young man who was loved by everyone. Wherever he went he lit up everything. Edwards' sister Jade also spoke about their loss. "Ever since he was a baby boy he would play with race cars, and from there on it was an addiction," she told the Standard from New York. Sean was disarming and incredibly humble given his success and fame. Some people shine too bright for the world, and Sean was one of those people, a real fire spirit. Those who had the chance to meet him were always charmed. It is believed the family is travelling to London to plan a funeral for next week. Reporting by Kate Kyriacou, Naomi Lim, Kate McKenna and Kris Crane