Aeris 3A
From Kerbal Space Program Wiki
The Aeris 3A is a small agile low altitude stock plane. It is commonly used as a training craft, as it is very easy to control. The Aeris 3A appears to serve a similar purpose to the real-life BD-5 Microjet.
It uses one Basic Jet Engine and holds 300 liters of jet fuel. Its range is somewhat decent for its small size.