Test of TripleHead2Go and 3 projectors

[Hans Krohn]

Hi Paul,

why is the center screen smaller than the side screens?

Hans

[PaulEMB]

Hi Hans,

The reason is the full size of the image I can project given the layout and space restrictions.

The size at 1750 is an exact fit for the centre projector image. The side screens are hinged where they join the front ( There is a door to the garden I need to use behind), and can be longer - as the image is projected at an angle, it is wider.

I could of course move the projectors back, but I have to be careful of getting shadows from the nose of the shell again.

My idea is when we move house, and have more space, I can open up the width, and adjust the projector rack without having to start over again.

Pictures added to EMB category

[NicD]

You're ahead of me now Paul ... so now I'm watching your progress

We'll be firing up the 3 projectors again next week and doing some development work. Not sure if we'll bounce off mirrors or go direct like you have ... we'll see how the tests go. Would be good if we could mirror-curve a back-projected image.

[PaulEMB]

Hi Nic,

I was thinking the same thing this morning, but haven't found a source for the acyrilic mirror.

The beauty of the setup, is it would be easy to move the projector rig to behind/above the screens, and curve the MDF - just means making a curved mount.

Still, one thing at a time
Waiting for my new Routech yokes and a bunch of stuff from FDS...

[Radar]

Hi! Did you see this? Notice the mirror and the Sintra.
Acrylic mirror installed and reflecting onto the 4x8 sheet of sintra.What ever that is?


http://www.biagettis.com/737simproje...roject_008.htm

Mike

[NicD]

Yeah I experimented with a curved mirror a few months back. Got it from a plastics workshop, it's around $90AU per sqr metre.

The Sintra is the stuff they make political and real-estate signs out of - 2 light, flexible plastic surfaces back-and-front wedged together over a honeycomb core (about 5mm thick all up). Got 2.5m x 1.5m for about $50AU.

Its amazing how far you can bend the mirror - I got to about 30 degrees. I put 2 L-shaped aluminium pieces down the sides and 2 threaded rods between them, wing nuts on each end , and you can tension them up to get the curve you want.

With a short thrown distance of about 1m and a screen distance of about 2m the effect was amazing ... display width almost doubled. I curved the screen to the same curve as the mirror and voila - no warping of the image. Only thing is - if you see other aircraft pass in front-of-you they look a bit stretched . Slight loss of image quality, acceptable though.

For a single strecthed image it's worth experimenting with. Not sure how it would go with 3 projectors .. you couldn't curve the 2 side displays very far otherwise the image would stretch too far and you'd get wierd movement cues at extreme left and right. Also tricky to line up the 3 images!

[Hans Krohn]

Hi Nic,

how easy it is to set up the views for 3 projectors depends on the mount.

I am now designing a mount for my 3 projectors. It will allow for fine adjustments and requires only one attachment point to the ceiling. I will post my solution here once it's ready!

Regards,
Hans

www.hanskrohn.com

[PaulEMB]

I used a flat screen TV mount for my projectors (mounted horizontally ie ceiling not wall) - this gives around 45º vertical and 360º rotary (forgetting the cables).

My original plan called for threaded rod (the savior of sim builders) to adjust the height, giving millimeter control, with a similar rod to control direction.

That's still the plan, of course, but as my master mechanic said when I was an apprentice (he was from Yorkshire) sometimes "the rack of the eye and skew of the gob" method still works. I think in Australian that is called "she'll do mate"

Of course neither of these methods work in Germany, so I'm looking forward to Hans' plans. ( )

Sorry, Hans, looking forward to your great ideas!

[simppa]

What do you think of those security convex mirror which are made acrylic found on supermarekets and roadside. I contacted one manufacturer of those and asked if they are able to make concave they answered and quoted folowing.I am working for a company which import allkind of stuff from china. I think that china is the answer for homebuilder to get reasonably priced parts and materials.I am in planning process of building the simpit and do not have much knowhow yet. Hope i can use my work connection to get hold of good stuff for whole simcommunity.

Dear Sir,

We can make concave mirror. Following is the details:

1) Material: Acrylic
2) Weight: 0.47KG (Dia. 500mm)
2.34KG(Dia.1000mm)
3) EXW Price:
USD 20.2/pc (Dia. 500mm)
USD 91.0/pc (Dia. 1000mm)

[NicD]

Security mirrors can work. Trouble is, you can't adjust the amount of curve on the mirror.