Jan um well I cannot say every Otter ever made for flight sim, though there was as FS9 version that I ported across into FSX but it was hopeless. AS for FSX there was the Virtual Col version which a search of the Library here shows I spent a great deal of time attempting to get it to behave like a real Otter should or would, close but lots of issues with textures etc but that said it was not that bad. Then came the AH/JF version - Lots of eye candy but the air. file and probably the mdl. files are a problem as there is build in issues with excessive acceleration in flight, overspeed and somehow mach buffet when you get to 125 kts and it is a frames/fps hog despite having many many nice points it was not as far as I am concerned authentic. I have seen and heard real Otters and have personally flown the Beaver in the RW. I have also spent many thousand of hours in noisy box fuselage STOL aeroplanes at about 105 knots, they are all good climbers (not fast but great angle and ROC intially to get you out of tight spot with ease, with steep nose down attitude on approach with full flap and marvellous low speed control right to the stall. Could not achieve this with the VirtualCol or the AH versions. So I tested this one, set up power and attitude for a 65 knot approach and it held it flawlessly all the way down from 3000ft to touchdown exactly as I would expect it to do. For that alone it gets a big tick. Likewise 105 knots is an ambitious cruise speed but near enough.
Some have said the Otter is like a truck, well maybe no it is just a classic STOL aeroplane, they are all like this very stable, slow and compared to even a Cessna, they have quite pedestrian performance and that's the charm of STOL aeroplanes and STOL flying, that is what they were built to do, big loads short fields. The Otter is a very large aeroplane next to a Beaver with nearly twice the volumetric and weight carrying capacity but with a big box fuselage and a fat STOL wing profile. On top of that it has built in drag from struts wheels and or floats not to mention its general shape. If you ever get the chance to see one you will be impressed how big these are, especially if they are on floats. Of course its successor with 2 PT6's is charming and also great fun but that has been done well already.
Then of course last but now there is the current MILVIZ rendition and it is in my humble opinion an authentic rendition and a lot of time and trouble went into the texturing etc which is superb. So that's my salad bar of Otters. I find them to be an aeroplane that grows on you, they are ruggedly styled but you want to have fun and use them as they were used, try flying them to their STOL parameters into tight strips with big loads, mountain side sloping runways. The only thing I can say is that finally, along with the Beaver, we have STOL aeroplanes that fly and perform like STOL aeroplanes, proper STOL flight has been sadly neglected in the real world and the sim world because it is a specialty operating environment but it teaches you precise speed/attitude control power/performance control, my kind of flying (that and radial engined aeroplanes in general) and now I can really explore this side of the simulation environment properly.
Point taken about the sound it is very very good. I can almost feel that engine rumbling along.
Well I am now a very happy camper, the MILVIZ Beaver and Otter, Milton Schupes Dash 7 and the Aerosoft Twin Otter, my cup runneth over with STOL aeroplanes built by de Havilland Canada.
Anyhow for those around if you want to really go bush flying with a model that performs like a STOL aeroplane should but looks great, has an appropriate vintage and modern VC and amazing sound package, then this is it, FULL STOP.