Grob 115E

[NutLoose]

Wiki is your friend

The Grob G 115 is a general aviationfixed-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 pitchpropeller is in service with the Finnish Air Force,[1] 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 of the Royal Air Force Air Cadets.[2] As of 2020, the Tutor is still being used by the RAF for some Elementary Flying Training (3FTS) but is due to be phased out in favour of its replacement, the Prefect T1.

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 GPSsystem, digital HSI and digital engine instruments.[[i]citation needed] 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.

https://en.wikipedia.org/wiki/Grob_G_115

Looking at the pictures it appears to gain an aerial on the spine but loses one underneath.

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