If you are looking for an airplane that can be put to work then the Graupner Jodel Robin DR400 is the airplane for you. With a wingspan of 98" (2.5m) and 1:3.5 scale the Robin is a very stable flyer that can be fitted with a gas or electric engine.
The fuselage provides plenty of room for fitting your RC equipment and with the removeable cockpit access to your RC components is easy regardless of the way you plan to power your Robin. The two removeable wing halves make the Robin easy to transport and setup at the field.
The Graupner Robin is standard fitted with an aero-tow coupling which makes it an ideal companion for towing sailplanes of up to 6-meter wingspan or tow large banners as well.
The Robin DR400 is a wooden sport monoplane, conceived by Pierre Robin and Jean Délémontez. The Robin DR400 first flew in 1972 and is still in production. The current model is designated 'DR401'. It has a tricycle undercarriage, and can carry four people. The DR400 aircraft have the 'cranked wing' configuration, in which the dihedral angle of the outer wing is much greater than the inboard, a configuration which they share with Jodel aircraft. This model is considered easy to fly by many and quiet during flight due to its wooden frame.