Operational Noise from the Attraction
7.4. The proposed ride will take 24 guests, seated in 6 cars, travelling up to the highest point of the
attraction. There the ride terminates and lets gravity take the car back the same route until it reaches
the station. The ride profile will be an approximate 1 minute ride period and a 1 minute turn around
period. It is understood that a maximum of 24 guests will ride the attraction at any one time.
7.5. This assessment has assumed an LAeq LOAEL level for noise from the attraction that is equal
to existing background noise levels, expressed as LA90 dB. This is in the context of the general
soundscape of Chessington World of Adventures.
7.6. It is understood that the ride is motor driven, with the motors located at the base of the ride,
housed within an enclosure.
7.7. The ride supplier has provided noise level measurement for a similar ride, based in Italy. This
ride is a larger ride than the proposed CWoAR ride and will seat more riders.
7.8. The following comparisons can be made between the Project X attraction and the proposed
attraction.
- The example Project X has 7 vehicles x 4 passengers on each train. This can accommodate up to 28 people at a single ride. Project Amazon on the other hand can only accommodate 24 guests at every ride. The lower number indicates that noise from screams will be slightly reduced compared to the reference data.
- There are a number of similarities in the track design between Project X and proposed, including sections that will generate the highest levels of noise. The measurements undertaken at a position 5m away from this section of Project X showed that the noise from the car, without passengers, is 71 dB LAeq. This can be calculated to 77 dB LAeq at 1m from the attraction. The level with passengers is 92 dB LAeq at 1m.
- The Project X had a speed of 24m/s while the proposed Chessington ride is 20m/s. The slower speed will reduce both ride and scream levels.
- The Project X has a lift to bring the cars into place, the proposed Chessington ride has no such lift. The lift mechanism generates relatively high levels of noise at 76 dB LAeq, at an assumed 1m. This figure is taken from the Project X noise data.
7.9. The above differences between the two rides are expected to reduce the operational noise
levels by 3-5 dB for the proposed Chessington ride, compared to Project X.