We have actually teamed up with a company called AMT Netherlands to build our custom engines. The engines are not cheap because most of the companies are making them in very very small batches. We are currently increasing our numbers so the numbers are coming down considerably. We are actually currently working on a small thrust class turbofan which would solve a lot of issues that turbojets present. If you check out our videos we have flown all over the world for different companies like RedBull. We have also flown at many over land events like the Austrian F1 (https://www.youtube.com/watch?v=AZpMLyAOFiQ)as well as at The Festival of Speed at Goodwood (https://www.youtube.com/watch?v=LvELzB7jY_0?).