The rocket will be used to power the Bloodhound car in the hope it'll break the world landspeed record, travelling at more than 1000 miles an hour.
More top news
Here's the forecast for Devon, Cornwall, Somerset and Dorset.
Here's the forecast for Wiltshire, Gloucestershire, Somerset, Dorset and Bristol.
A dance class in Exeter which was crying out for more women just one week ago say they've been inundated with requests to join.