Varocketry

The AC Nitro is very reliable by all accounts of those flying here and from owner of a large school in FLA. The AC Tornado 280 is a powerful motor at a lite weight. I changed from Parajet 200 and shaved about 20 lbs carrying weight. the AC Tornado has head bolt problems though in that the lower two bolts , nearer the exhaust, do not hold tension and loosen up ever 1-2 hrs flight time. Easily remedied by retorquing to recommended 23 Nm before each flight. if you don’t and have an engine failure , the owner will not honor warranty saying you didn’t maintain the motor and it went rich - causing damage. No recognition of head bolt problem - in fact, outright denial. 4 of 4 Tornados here had this failure between 30-45 hrs. They’ve introduced a new XC head with lower compression as a fix but it’s unclear how that solves the bolt loosening problem. No issues with the Nitro.