  The cross section of the $p(e,e'\pi^+)n$ reaction has been measured for five
kinematic settings at an invariant mass of $W = 1094$ MeV and for a
four-momentum transfer of $Q^2 = 0.078$ (GeV/$c$)$^2$. The measurement has been
performed at MAMI using a new short-orbit spectrometer (SOS) of the A1
collaboration, intended for detection of low-energy pions. The transverse and
longitudinal cross section terms were separated using the Rosenbluth method and
the transverse-longitudinal interference term has been determined from the
left-right asymmetry. The experimental cross section terms are compared with
the calculations of three models: DMT2001, MAID2007 and $\chi$MAID. The results
show that we do not yet understand the dynamics of the fundamental pion.
