Simulator Project VIDEO ADDED

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 Ok, Slopey, looks like I'll just use the projectors in that case.

Up to you - do it like you want, but you should sit down and plan it out properly.  If you try and do the visuals as you go along, you'll likely have issues.  i.e. the lack of space - I think I pointed out in the first few pages of the thread that you'd better do your size/throw/position/screen calculations first before you find it it won't fit.

Get a tape measure, some white sheets and masking tape and measure out where the screen would be.  Use the sheets and the tape to stick the sheets from the ceiling in the correct position approximating the curve.  Then get someone to help - sit inside the cockpit and determine where the screen bounds should be on the sheet to give you the view you require (use the tape to denote the bounds).

Then measure the bounds of the screen which will probably result in a "widescreen" rectangle.  Divide that by two if you're using 2 projectors and work out the throw distance from the projector mounting position to the screen, and the diagonal image size you need (with Pythagoras).

Then go to Projector central's calculator pro and see which models will give you the throw and size you want.  You might be better to mount the projectors upside down (i.e. a ceiling mount configuration) as that'll show the image below the lens position, as opposed to desktop placement where the image is usually from the lens position upwards.

PAY ATTENTION to the keystone - if you mount the projector on a slope, it'll need enough keystone correction to give you a rectangular image rather than a trapezoid.  Trapezoids would be very bad considering you want to have the images used together with no separation - especially if you have the image meeting in the center of the view.

It may be that a two projector setup with the images meeting in the center of the view won't work very well - you should check out the various cockpit builder forums to see who has done it already and get any tips.

If you go the LCD/Monitor route - note you can't just stick one in the front and two at 90 degree angles on each side.  If you push a triplehead output to that, it'll look wrong, as the two side views are really 45 degree from the center position (i.e. it's a streched forward view), so if you look out the left window, you'll see the image of looking 45 rather than 90 degrees out.  In that scenario, you'd need to produce 3 separate views - one forward, and two at 90 degrees (which is not the same as a L/R of a widescreen setup unless you can change the Field of View).  Also note that on widescreen setups, because of FoV issues, scenery to the far left and right is "magnified" - i.e. if you fly with an airport off to your left and look at it on a triplehead setup, it looks huge and close.  When you bank round towards it, it gets smaller until it's in the center monitor where it's the correct size.  The side monitors and TH setups all suffer from the FoV effect, and you only get away with it as your focus is predominantly on the center monitor with the L/R just used to fill out the experience.  If you used the L/R as "windows" in their own right, i.e. looking directly at them, it would look odd.