ei->base_intro ^

	              e->type ^

	              e->GetGRFID());

	uint32 r = Random();

	e->intro_date = ei->base_intro <= ConvertYMDToDate(_settings_game.game_creation.starting_year + 2, 0, 1) ? ei->base_intro : (Date)GB(r, 0, 9) + ei->base_intro;

	if (e->intro_date <= _date) {

		e->age = (aging_date - e->intro_date) >> 5;

		e->company_avail = (CompanyMask)-1;

		e->flags |= ENGINE_AVAILABLE;

	}

	e->reliability_start = GB(r, 16, 14) + 0x7AE0;

	r = Random();

	e->reliability_max   = GB(r,  0, 14) + 0xBFFF;

	e->reliability_final = GB(r, 16, 14) + 0x3FFF;

	r = Random();

	e->duration_phase_1 = GB(r, 0, 5) + 7;

	e->duration_phase_2 = GB(r, 5, 4) + ei->base_life * 12 - 96;

	e->duration_phase_3 = GB(r, 9, 7) + 120;

	e->reliability_spd_dec = ei->decay_speed << 2;

	CalcEngineReliability(e);

	/* prevent certain engines from ever appearing. */

	if (!HasBit(ei->climates, _settings_game.game_creation.landscape)) {

		e->flags |= ENGINE_AVAILABLE;

		e->company_avail = 0;

	}

}

/**

 * Start/initialise all our engines. Must be called whenever there are changes

 * to the NewGRF config.