I thought you might like to see a 1:1 version of the Climax. This is #1694 running on PBR on 22 September 2013 (a thank-you train for those who restored the Climax or helped fund it.
http://s872.photobucket.com/user/john_1937/media/Climax1694_zpsed1e1829.jpg.html

http://s872.photobucket.com/user/john_1937/media/Climax1694atBelgrave_zps63527068.jpg.html
This model does not require digital sound! Cheers.

I can understand Bachmann catering for the North American market in their release of large-scale locomotives and rolling stock, even though the "Thomas" items are based on British locos and rolling stock (See http://en.wikipedia.org/wiki/Thomas_the_Tank_Engine ). The narrow gauge locos include Skarloey, based on the 1864-built 0-4-2 ST locomotive Talyllyn , Rheneas based on the 1866-built 0-4-4 WT locomotive Dolgoch, Sir Handel based on the 1878-built 0-4-2 ST locomotive Sir Haydn, Peter Sam based on the1921-built 0-4-2 ST locomotive Edward Thomas, Rusty based on the 4 wheel Midlander, a diesel mechanical engine built in 1954, and Duncan based on 1918-built 0-4-0 T Douglas. All these prototype locos are from the Welsh Talyllyn Railway: see http://www.talyllyn.co.uk . (The current status of locos and rolling stock is available at http://en.wikipedia.org/wiki/List_of_Talyllyn_Railway_rolling_stock .) So Bachmann could extend both the "Thomas" range and the range of narrow gauge locos at the same time. Alternatively, they could just produce some large-scale models of the original named Talyllyn engines – my preference!
John

Wow! Francois, that Garratt is great. I would like to suggest that Bachmann should broaden the range of large scale models to include locomotives from places other than North America, such as United Kingdom, Europe, Australia and New Zealand. For example, a large-scale model of the narrow gauge K1 Garratt would appeal to those who are aware that it was as the first of its type. An original blueprint is available from the Australian National Archives at http://naa12.naa.gov.au/scripts/Imagine.asp?B=1080282&I=1&SE=1 , a manufacturer drawing at http://upload.wikimedia.org/wikipedia/commons/f/f6/K1_drawing.jpg , a works photo at http://de.academic.ru/pictures/dewiki/75/K1_works_photograph.jpg , and line drawings at http://s405.photobucket.com/user/dirty_numb_angel_boi/media/British%20Steam%20Drawings/Beyer_Peacock_K1.jpg.html . For those who would like to see a full CAD rendering, a book is available, as described at http://lightrailwayresearchsocietyofaustralia.cart.net.au/The-Anatomy-of-a-Garratt . Further details about Garratt locos can be obtained from  http://en.wikipedia.org/wiki/Garratt  and/or  http://www.beyergarrattlocos.co.uk/source.html  or  http://users.powernet.co.uk/hamilton/source.html . Those who wish to see a Garratt loco in action can try  http://www.youtube.com/watch?v=zFlmwCUpCHo and many other examples will be suggested. If more recent Garratt models are desired, see G42 (Puffing Billy Preservation Society) at  http://pbps.puffingbilly.com.au/rolling-stock/locomotive-fleet/  or at  http://4largescale.com/fletch/d30e.htm  and see NGG16 Class examples at  http://en.wikipedia.org/wiki/List_of_Welsh_Highland_Railway_rolling_stock  , and  http://www.martynbane.co.uk/modernsteam/pg/ngg16a/ngg16s.htm .
Enjoy, John.

Dave mentioned Baldwin influence in New Zealand 3ft 6in narrow gauge. Baldwin had an influence in Australia too. See . http://www.puffingbilly.com.au/‎; and en.wikipedia.org/wiki/Puffing_Billy_Railway
Baldwin also provided Lyn to the Lynton and Barnstaple railway in UK. (David Fletcher has shown both Lyn and NA locomotives together. See: http://www.762club.com/images/gallery5/5.pdf or http://www.pacificng.com/ref/blw/style/stylediag/Na1-Lyn-Colour2-STLE-292-223.png )
If Bachmann is looking to provide more narrow gauge locos and rolling stock, then I suggest that the NA class of locomotives supported by the Puffing Billy Preservation Society would be great candidates. The NA class is similar to the Lyn model but has a 2-6-2T wheel arrangement (Prairie). Two were manufactured in Philadelphia USA and the remaining 15 in Australia between 1898 and 1915. Five of the 15 are still in service: see http://pbps.puffingbilly.com.au/rolling-stock/locomotive-fleet/ . NA 3A (in storage) & 6A were in Victorian Railways Green livery, 7A & 12A were in V.R. Red livery, and 8A & 14A were "all over black". So Bachmann could produce several different locos economically in the one production run, with each representing an existing heritage loco. If they wished, they could add one of the first two in the Baldwin Green as portrayed by David Fletcher. (A black live steam model was reviewed by Marc Horovitz in May 2001: see http://www.sidestreetbannerworks.com/locos/loco13.html but this model no longer appears to be in production.)
John

Thanks Jon. It is good to receive such a prompt reply.
Local hobby stores do not carry stock and making two-hour flight each way just to measure models seems extravagant, especially for a pensioner.

I have searched the site (and elsewhere on the web) for dimensions of the engines, tenders and rolling stock in the sets like 900050, 90057 and 90059.
Can anybody tell me the height/width/length for these items (both passenger sets and goods sets)?