check if we should send new servos to flightgear

def check_sim_out(self):
        '''check if we should send new servos to flightgear'''
        now = time.time()
        if now - self.last_sim_send_time < 0.02 or self.rc_channels_scaled is None:
            return
        self.last_sim_send_time = now

        servos = []
        for ch in range(1,9):
            servos.append(self.scale_channel(ch, getattr(self.rc_channels_scaled, 'chan%u_scaled' % ch)))
        servos.extend([0,0,0, 0,0,0])
        buf = struct.pack('<14H', *servos)
        try:
            self.sim_out.send(buf)
        except socket.error as e:
            if not e.errno in [ errno.ECONNREFUSED ]:
                raise
            return