The 525 Relentless won’t be delivered to its first operators until 2017, Textron Chairman and CEO Scott Donnelly told financial analysts today in explaining the Bell Helicopter parent’s second-quarter earnings. The 525 first flew July 1; the manufacturer had aimed to get the super-medium twin in the air before the end of 2014. Donnelly said interest in the 525 is strong; in the second quarter, he said, Bell received 30 additional letters of intent from customers to purchase the fly-by-wire helicopter. Textron’s revenues for the three months that ended July 4 were down 7.3 percent, to $3.25 billion, compared to the same period in 2014. Its profits were roughly flat over that time at $306 million. Bell’s revenues were down 24 percent, to $850 million; its profits were down 28.4 percent, to $101 million.