We present the Far Infrared Telescope project submitted to the micro satellite programme of CNES and initially combined to a γ ray mission. Millimeter wave emission from MeV-electrons is now well known, and on very few occasions non solar dedicated γ ray detectors have revealed emission from electrons at still higher energies. The combination of two diagnostics: relativistic electrons-synchrotron radiation in the far infrared and Bremsstrahlung at γ ray would probe electrons at energies above 10 MeV with 100 ms time resolution, yielding unique information on the yet unknown high energy cut-off of the electron spectrum, and on the response of the high photosphere to energy input during flares. We emphasize the opportunity to observe solar flares in far infrared bands and to test uncooled detectors at the ground based station dome C in Antarctica.