FS One V2 – 2048 Resolution
Resolution is the term used to describe how many steps there are when moving the sticks over their full range. The transmitter measures these steps, and 2048 resolution means that there are 1024 steps in one direction and 1024 steps in the opposite direction (e.g. right/left rudder stick). The control sticks on most transmitters move about 1 inch in each direction, or 2 inches total side-to-side. So 2048 resolution gives about 0.001 inch or one-thousandths of an inch of measurement accuracy.
DECIDING WHAT RESOLUTION TO FLY
Pilots want high resolution because the human finger is very sensitive and can easily feel a 0.001 inch step. For instance, lay a piece of aluminum foil flat on a table, and then run your finger over the edge. You can feel it. Aluminum foil is about 0.001-inch thick. This sense of touch is what pilots use to make precise and continuous adjustments when flying, whether it’s a high speed jet, helicopter or sailplane. Even for sport flying this degree of resolution makes a difference. It’s the difference between flying smooth or flying “steppy”, which why 2048 is a big deal.
2048 vs 256 RESOLUTION
MAKE THE CHOICE
Now take 2048 and divide that resolution by a factor of 8. Yes, 8 times less resolution, or 256. That’s the difference between measuring with a yard stick in 8ths of an inch vs a precision steel ruler in 64ths of an inch. What would you rather use?
The truth about other RC simulators — If you buy any other RC simulator, chances are that the resolution is only 256. It is not hard to discover this fact. The Windows game controller program (in the control panel) allows you to see the ‘raw data’, which shows the counts. Surprisingly, some simulators that come with only 256 resolution end up using only a fraction of that. In our measurements with full stick deflections, the count started near 50 and only went to near 200, which is a resolution of only 150 counts. With that kind of resolution on a 3D aerobatic airplane, it means that moving the stick causes the control surfaces to move in steps as large as 2/3rds of a degree. With the control surface deflections being that imprecise, flying with precision is not even possible whether it’s a jet, sport flyer, sailplane or 3D aerobatic aircraft.
The difference between 256 and 2048 resolution is shown below for an aerobatic airplane with a surface having 45 deg up and 45 deg down elevator. Small deflections around cruise flight are shown. For each step with 256 resolution, the higher 2048 resolution breaks it down into 8 more steps. Obviously the higher resolution is essential to having precise and smooth control when you fly.
THE COST OF BUILDING 2048 RESOLUTION
Why not use 2048 resolution for all simulators and real transmitters? The electronics and supporting firmware that together make 2048 work for all channels is much more expensive than off-the-shelf 256 circuitry. 256 resolution is cheaper to produce because many chips are 8-bit which directly and cheaply gives 256 resolution. With 2048, it requires 11-bits and usually that requires a 16-bit chip. And this 16-bit chip must work for all supported channels, e.g. the 8-channel capability in FS One V2. And on top of having high precision, it must be fast. As tiny as they are, these chips are not cheap!