Two Carbs instead of one

See attached figure and think how carburetors can installation canbe possible.?

100 years efforts by Rotax can not go in to sink.

I would like to know this as well. I've heard the duel carbs being touted as redundancy for safety but if each only feeds two cylinders then what's the point?

Once again, I am going to try to read the mind of the designers.

Anyone who has ever sat behind a Radial engine knows it is the worst design that can be for visibility over the nose.

The ideal profile is to have as little engine as possible above the prop shaft.

The 912 series is pretty good in that respect due to the gearbox raising the prop shaft well above the crankshaft.

The next consideration is how to get fuel into, and exhaust out of, the engine.

Assuming you want to place a muffler below the engine, a bottom exhaust would be preferred, making a top intake the default location.

To keep the profile low, Two small Carbs tucked in close would be preferred over one larger central carb.

Compare this with a Continual style engine with the prop shaft being an extension of the crankshaft causing half the Block to be above the prop, limiting forward visibility.

Keeping both the Intake and the exhaust below the engine requires an Up-Flow Carb and no room for any practical muffler system.

Overall it just comes down to balancing out the compromises.  

The quirky synchronizing of dual carbs is balanced by the improved forward visibility.

Be happy they didn't go with 4 carbs, one for each cylinder!

No Matter what they did, someone wouldn't like it!

That makes sense. If one of them fails though, will the engine still run even if poorly or would it just stop?

I'm guessing having each cylinder fed by two carbs in the same way they are fed by two spark plugs would not be practical?

It's for the same reasons that old race cars and sports cars usually had multiple carburetors.  They basically delivered more, smoother power, which, in those applications, was considered worth the trouble of making sure they were all tuned/synchronized.