Grob G 115
The Grob G 115 is a general aviation fixed-wing aircraft, primarily used for flight training. It is built in Germany by Grob Aircraft (Grob Aerospace before January 2009). The E variant with a 3-blade variable pitch propeller is in service with the Royal Navy and Army Air Corps for Flying Grading (a pre-EFT flying course) and in the Royal Air Force as part of No. 6 Flying Training School (6 FTS) which provides flying to both University Air Squadrons and Air Experience Flights to Cadets from the Air Training Corps and Combined Cadet Force.
|G 115 (Tutor)|
|Grob Tutor T1 of the Birmingham University Air Squadron, Royal Air Force|
|First flight||November 1985|
|Primary users||Royal Air Force|
Egyptian Air Force
British Army Air Corps
The Tutor was previously used as a tri-service trainer for Elementary Flying Training, before being replaced in 2018 by the Prefect T1.
The aircraft is constructed of carbon composite materials. The main fuselage and each wing spar is a single piece. It has a fixed (sprung steel) tricycle undercarriage with spatted wheels, a short nose bearing the 180 hp engine and a 3-bladed variable-pitch propeller. The aircraft was re-certified in 2013 with a new MT Propeller following issues with the previous design. The inverted oil system was also redesigned to improve lubrication during aerobatics. The cockpit features a broad canopy arch and spine. Forward visibility is good. The side-by-side seats are fixed and pilot seating is adjusted with cushions as well as a rudder bar adjuster. The wings are tapered with square tips and the empennage consists of a large fin and rudder with an oblong tailplane with square tips mid-set to the fuselage.
The initial Grob G 115 and G 115A models had an upright fin and rudder and were mainly sold to civilian aeroplane clubs in Germany, the United Kingdom and several other countries.
The aircraft is capable of basic aerobatic manoeuvres (limited to +6G and −3G).
Grob 115D2 (Heron)
The Grob Heron was first bought by the Royal Navy. After its use five were bought by Tayside Aviation. There are only six recorded Herons in existence; two (to be sold) operated by Tayside Aviation, three privately owned and one in Germany. One was reported as written off after an accident.
Grob 115E (Tutor)
With the retirement of the Scottish Aviation Bulldog T.1 from Royal Air Force University Air Squadrons (UASs) and Air Experience Flights (AEFs), a new system was put in place for the provision of the UAS and AEF flying tasks. Aircraft were to be owned and operated by private industry, contracted to the Ministry of Defence (MoD). The aircraft chosen for this task was the Grob 115E, designated Tutor T1 by the MoD. The Tutor fleet is owned and maintained by a civilian company, Babcock, and carry British civilian registrations under a Private Finance Initiative (PFI) scheme, painted overall white with blue flashes and UK Military Aircraft roundels.
Royal Navy, Army and RAF Elementary Flying Training (EFT) was previously taught on the Grob Tutor at RAF Cranwell and RAF Barkston Heath by the joint 3 Flying Training School with 703 Naval Air Squadron, 674 Squadron Army Air Corps Squadron and 57 RAF Reserve Squadrons, before being replaced in 2018 by the turboprop trainer, the Grob G120TP Prefect. Students are then streamed according to ability: Fast Jet, Rotary Wing, Multi-Engine or non-pilot roles.
Until 2005 the Tutor was used by UASs to provide EFT to university students, many sponsored by the RAF. From 2006, UAS students are no longer taught EFT, they follow an unassessed flying syllabus similar to EFT, but with only a 36-hour course and the possibility of progression to more advanced training on merit. The Tutor is also used by AEFs to provide flying experience for cadets of the Air Training Corps (ATC) and Combined Cadet Force (CCF), replacing the Bulldog in these roles at the turn of the century. The final AEF to receive the Tutor was 10 AEF based at RAF Woodvale in Merseyside, in 2001. 10 AEF was incidentally also the last AEF to receive the Bulldog in 1996, replacing the Chipmunk.
In 2009 some Tutor squadrons began to receive new Enhanced Avionics (EA) Tutors, with an updated and enhanced instrument panel, featuring a Garmin GNS 430W GPS system, digital HSI and digital engine instruments. These aircraft are the same as the standard Tutors with the exception of an extra VHF aerial for the new GPS system and the cockpit modifications.
- Flight Training Adelaide– 2 aircraft
- Australian Flying School – 8 aircraft
- China Southern West Australian Flying College – 38 aircraft
- Ostende Aviation college – 3 aircraft
- Aeroclub Keiheuvel – 1 aircraft
- Ottawa Aviation Services – 3 aircraft
- Journey Air, Windsor Ontario - 1 aircraft
- Egyptian Air Force – 74 aircraft
- Finnish Air Force – 28 aircraft
- Kenyan Air Force – 3
- Norwegian Aviation College – 4 aircraft
- Aeronautical Web Academy – 6 aircraft
- United Arab Emirates Air Force – 12 aircraft
- Royal Air Force – 89 aircraft
- No. 6 Flying Training School RAF – RAF Cranwell
- University of Birmingham Air Squadron – RAF Cosford
- Bristol University Air Squadron – MoD Boscombe Down
- Cambridge University Air Squadron – RAF Wittering
- East Midlands Universities Air Squadron – RAF Cranwell
- East of Scotland Universities Air Squadron – Leuchars Station
- Universities of Glasgow and Strathclyde Air Squadron – Glasgow Airport
- Liverpool University Air Squadron – RAF Woodvale
- University of London Air Squadron – RAF Wittering
- Manchester and Salford Universities Air Squadron – RAF Woodvale
- Northumbrian Universities Air Squadron – RAF Leeming
- Northern Ireland Universities Air Squadron – JHFS Aldergrove
- Oxford University Air Squadron – RAF Benson
- Southampton University Air Squadron – MoD Boscombe Down
- University of Wales Air Squadron – MoD St Athan
- Yorkshire Universities Air Squadron – RAF Linton-on-Ouse
- No. 1 Air Experience Flight RAF – MoD St Athan
- No. 2 Air Experience Flight RAF – MoD Boscombe Down
- No. 3 Air Experience Flight RAF – Colerne Airfield
- No. 4 Air Experience Flight RAF – Glasgow Airport
- No. 5 Air Experience Flight RAF – RAF Wittering
- No. 6 Air Experience Flight RAF – RAF Benson
- No. 7 Air Experience Flight RAF – RAF Cranwell
- No. 8 Air Experience Flight RAF – RAF Cosford
- No. 9 Air Experience Flight RAF – RAF Linton-on-Ouse
- No. 10 Air Experience Flight RAF – RAF Woodvale
- No. 11 Air Experience Flight RAF – RAF Leeming
- No. 12 Air Experience Flight RAF – Leuchars Station
- No. 6 Flying Training School RAF – RAF Cranwell
- Royal Navy - unknown
- British Army - unknown
- Army Flying Grading School, Middle Wallop
- Almat Aviation
- Lancashire Aero Club
- Tayside Aviation – 5 aircraft
- Air Midwest - 2 aircraft
Specifications (G 115E/EG)
- Crew: 2
- Length: 7.54 m (24 ft 9 in)
- Wingspan: 10 m (32 ft 10 in)
- Height: 2.4 m (7 ft 10 in)
- Wing area: 12.2 m2 (131 sq ft)
- Airfoil: Eppler 696
- Empty weight: 685 kg (1,510 lb)
- Max takeoff weight: 990 kg (2,183 lb)
- Fuel capacity: 143 l (38 US gal; 31 imp gal)
- Powerplant: 1 × Lycoming AEIO-360-B1F/B 4-cylinder air-cooled horizontally-opposed piston engine, 139 kW (186 hp)
- Propellers: 2-bladed variable-pitch propeller
- Cruise speed: 185 km/h (115 mph, 100 kn)
- Stall speed: 96 km/h (60 mph, 52 kn)
- Never exceed speed: 343 km/h (213 mph, 185 kn)
- Range: 1,150 km (710 mi, 620 nmi)
- Service ceiling: 3,050 m (10,010 ft)
- g limits: +6.0 -3.0
- Rate of climb: 5.3 m/s (1,040 ft/min) solo
- 3.81 m/s (13 ft/s) dual
- Wing loading: 81.1 kg/m2 (16.6 lb/sq ft)
- Power/mass: 0.141 kW/kg (0.086 hp/lb)
Incidents and Accidents
- In June 2004, a Tutor lost a propeller blade and its canopy in flight. The aircraft was landed unpowered in a field, where damage was also sustained to the undercarriage. Subsequent investigation revealed cracking in the propeller blade roots across the fleet, which was grounded for modifications. No-one was injured in the incident.
- In February 2009, two RAF Tutors operating air experience flights from RAF St Athan collided in mid-air. All four occupants were killed, a pilot and a female Air Training Corps cadet in each aircraft. The two cadets killed were aged 13 and 14, both were members of 1004 (Pontypridd) Squadron Air Training Corps.
- In June 2009, a Grob Tutor collided in mid-air with a civilian glider. The two people in the Grob Tutor were killed. The glider pilot parachuted and survived.
Aircraft of comparable role, configuration and era
- "https://combinedcadetforce.org.uk/about-the-ccf/sections/the-royal-air-force". External link in
- "Naval Air Squadrons: 727". royalnavy.mod.uk. Royal Navy. Retrieved 9 September 2010.
- "HOME". Fly FTA. Retrieved 6 April 2019.
- "Näillä koneilla harjoittelevat tulevaisuuden hävittäjälentäjät – Puolustusvoimat ostaa 28 käytettyä harjoituskonetta". Yle Uutiset. Retrieved 2016-10-10.
- Operators list on Grob Aircraft website
- Lednicer, David. "The Incomplete Guide to Airfoil Usage". m-selig.ae.illinois.edu. Retrieved 16 April 2019.
- "Search for crash clues continues". BBC News. 12 February 2009.
- "Inquiry investigating". BOI.
- AAIB. "AAIB Report6/2010". Retrieved 9 January 2013.
- AAIB. "AAIB Report5/2010". Retrieved 9 January 2013.
- "RAF crew dead in 'mid-air crash'". BBC News. 14 Jun 2009.
- Flight Global – Grob Tutor Propeller Issues
- Winchester, Jim."Grob Tutor: Aircraft of the RAF Part 12". Air International, April 2009, Vol 76, No. 4. pp. 52–55.
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