The Russian economy, fuelled by the arms boom, can no longer continue its rapid growth, according to a forecast by a think tank specializing in Eastern Europe released on Tuesday. “It is now operating at the limits of its capacity and is showing increasing signs of overheating,” the Vienna Institute for International Economic Studies (WIIW) said on Tuesday. According to the think tank, the economy expanded by 3.5% last year. Due to high inflation and key interest rates that have been raised to 16%, the WIIW expects economic growth of only 1.5% in Russia this year. “Russia is increasingly depen…