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It's all about power. Whether you're out to nail razor-sharp maneuvers or smackdown-style
3D, your engine can make all the difference. Introducing the 105HZ and 105HZ-R, the newest
heli engines from O.S. More displacement translates into more power, and these are the largest
heli engines O.S. has ever produced. But even though they boast 15% more displacement than
a .91, they still fit in a .90-sized footprint. Another key to the 105's power is a velocity
stack that forces air evenly into the carb and if you want more efficiency while limiting
noise output, you can also equip it with this PowerBoost Pipe. It's available separately,
and it's a perfect fit for the 105HZ. And the back plate has mounting spots for the
RPM sensors used with Futaba gyros. Plus, you'll also discover that both engines run
as strong, or stronger, on 15% fuel than .91-sized engines using 30% fuel. That's a significant
savings in fuel costs for you! One added feature of the 105HZ-R is the Demand Regulator System,
which delivers consistent fuel flow regardless of the heli's attitude. But no matter which
one you choose, you'll enjoy big-time performance in a compact engine. Mount one in your .90-sized
heli today and see what a difference displacement makes!