Ignition engine weights are elusive and rarely can you get an accurate weight on any of them. I know the DA 50 is powerful but ones I have seen (3) were very tempermental. Advertised weight is 3.25 lbs, but that is a minimal engine. Add a muffler(5-7 oz.), Ignition system (5-7 oz, 1200-1400 Nicad (6-8 oz), a switch harness (1-2 oz), mounts (2-3 oz), and, oh yes, a spark plug (1-2 oz) and the total is 4.5 - 5.06 lbs. Still light and powerful but heavier than most claims.

Add those numbers to my previous totals and mine should weigh between 12.31 - 12.87 lbs, so let's round it up to 13.0 - 13.5 lbs. Still not 15!

I am tentatively planning a Fuji BT-43EI (4.5 lbs installed with battery). Why? Because I want to try one. Also flew a H9 72" Cap 232 several years ago with a G-23. It flew the IMAC intermediate pattern with authority and weighed slightly over 13 lbs. The Extra at 12.5 - 13.5 lbs with the Fuji 43 should fly just as well and provide some 3D if wanted. Don't need to hover, I have helis for that.

Considered an OS BGX 3500, which is lighter, more powerful...but messy. Also considered Supertigre 2300 which is lighter yet and is equivalent power to the OS 1.60 (that seems to be the case at the local field with identical ARF's), but again a bit messy.

I'm sure the Extra flys well up to 15-16 lbs, I just don't want to get there. Might even forego the Fuji and use glo instead as it will reduce weight and I already have them.