The results were equally impressive, with a steady 28-29kN (just under 3 tonnes) of thrust for the duration of the firing.
Watch the video of the test firing here - my favourite bit is when the camera on the other side of the lake gets blown over. This rocket's got some punch.
In February 2015, we're going to test the rocket with Bloodhound SSC's pump system, using the 550 hp V8 Jaguar engine.
With the increased pressure from the Bloodhound system, we're hoping to deliver a much higher thrust from the rocket.
Impellor: Art meets science
For 2015, the exact rocket thrust is not that critical, as we're "only" aiming to reach 800mph to test Bloodhound.
However, for 2016, the requirement is more demanding.
To reach 1000mph, we will need about 12 tonnes (120 kN) of thrust.
If we can increase the power output to 40kN for a single rocket, then we only need to fit three of them in the car (instead of four), which makes the rocket system packaging a lot simpler. We'll find out in a couple of months.
One of the technology advances that let us move from our previous F1 engine (750hp) to the more reliable Jaguar V8 (550hp) is a more efficient pump for the HTP (high test peroxide) oxidiser.
This pump needs to deliver 800 litres of HTP at 76 Bar (1000 psi) in just 20 seconds, which is why it needs so much power to turn it.
A newly designed impeller (the spinning bit inside the pump) has given us probably the most efficient rocket pump in history.
More efficiency = less power needed, so the Jaguar V8 is perfect for the new pump.