I found the specs below on the OS 1.60FX. If it really takes 3.7 HP OS 1.60FX to fly the Tunnel Vision in 3D, then the Stinger 26RE at 3.1 HP might struggle a little during serious 3D, but should be fine for sport flying. It all depends on what it weighs. Of course, the OS 1.60FX was one of the stronger running 1.60's. The Stinger 26RE and the OS 1.60FX weight very nearly the same (less than an ounce difference).
This is the OS Engines 160FX 1.60 ring glow engine, with 60F carburetor and included OS E5010 Muffler.
Specifications:- Displacement: 1.60 cu in (26 cc)
- Bore: 1.32 in (33.6 mm)
- Stroke: 1.16 in (29.6 mm)
- Practical rpm: 1,800-10,000
- Output: 3.7 hp @ 9,000 rpm
- Weight: 32.6 oz (925 g)
Recommended Props:- Aerobatic: 15x12, 15x13, 15x14, 16x10, 16x11, 16x12, 16x13, 16x14, 16.5x10, 16.5x11, 16.5x12, 16.5x13
- Sport: 17x10, 17x11, 17x12, 17x13, 18x10, 18x11, 18x12