And here's more proof that the BN 120 will fly good with any engine and at any weight. I started out with a MVVS 26cc and a tuned pipe 13.5 lbs. next was a Saito 270 twin, 16 lbs. including 18 ozs. of weight in the tail. Next was a Taurus 52cc 15.5 lbs. Next was a Brison 2.4, 13 lbs. It flew best with the Brison but all engines and weight were acceptable. My sentimental favourite was the 270 twin.