Hear a WW2 Rolls-Royce Merlin engine powered up this weekend

One of the most famous allied sounds of WW2, the Rolls-Royce Merlin engine was used in the Spitfire and Hurricane fighter planes and the Lancaster bomber, and this weekend you can hear one up close. The RAF Museum in North London are bringing a working engine to their front field and will switch it on for people to hear that famous roar.
(c) RAF Museum
The demonstration will last about 10-15 minutes, and will take place at 10.30am, 12.30pm, 2.30pm and 4.30pm this weekend (6th & 7th August).A