The Tutor was first manufactured 11 years ago, so a 14 year old comparison must be suspect. There were earlier variants of the Grob 115, but the 115E (Tutor) was made to meet a UK military specification, with first deliveries in 1999. The 115A-D were fibreglass aircraft with smaller engines that the CFC Tutor. 14 years ago, the Slingsby in military use was the 160HP Firefly. Both it and the 200 were more sedate than the Tutor. The Slingsby 260, as used by the USAF and later JEFTS, was more lively, but rather noisy, requiring its QFIs to wear expensive moulded ear plugs. The Control of Noise at Work Regulations of 2005 prompted the latest round of re-assessment of all working environments, and when the RAFCAM scientists got round to the Tutor, its cockpit was deemed to be an environment in which the occupants needed either extra acoustic protection or time-limited exposure.