{"version":"1.0","type":"link","title":"Model rocket motor classification - Newikis","description":"Motors for model rockets and high-powered rockets (together, consumer rockets) are classified by total impulse into a set of letter-designated ranges, from 1⁄8A up to O. The total impulse is the integral of the thrust over burn time.","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400}