Blacksmith

Prerequisites: Main Building level 3, Academy level 3, Travian Version 2.5 or higher

Your warriors' weapons are enhanced in the Blacksmith’s melting furnaces. By increasing its level you can order the fabrication of even better weapons.

An upgrade done to a unit counts for all units of that type in the village the upgrade is done. This means an upgrade done in village A does not count for troops coming from village B.

Note: better weapons only raise the unit's attack worth; it makes no difference when defending.

The bonus added by upgrading a unit is estimated to be 1.5% (factor 1.015). This means a unit's attack worth is base_worth*1.015^Blacksmith_level. The Roman Imperian for example has a default attack worth of 70. By upgrading the Imperian's weapons in the Blacksmith you get these results:

Blacksmith upgrade level
0	70
1	71.1 (70*1.015^1)
2	72.1 (70*1.015^2)
x	? (70*1.015^x)

With this Development calculator you can calculate how long each upgrade will take in the armoury and the blacksmith.

lvl						CP
1	170	200	380	130	4	2
2	220	255	485	165	2	3
3	280	330	625	215	2	3
4	355	420	795	275	2	4
5	455	535	1020	350	2	5
6	585	685	1305	445	3	6
7	750	880	1670	570	3	7
8	955	1125	2140	730	3	9
9	1225	1440	2740	935	3	10
10	1570	1845	3505	1200	3	12
11	2005	2360	4485	1535	3	15
12	2570	3020	5740	1965	3	18
13	3290	3870	7350	2515	3	21
14	4210	4950	9410	3220	3	26
15	5390	6340	12045	4120	3	31
16	6895	8115	15415	5275	4	37
17	8825	10385	19730	6750	4	44
18	11300	13290	25255	8640	4	53
19	14460	17015	32325	11060	4	64
20	18510	21780	41380	14155	4	77
Sum	84020	98840	187800	64250	62