Good dialogue and speculation. Thanks for the rundown on the Siemens order, it will be interesting to see their cars go into the regional service and on VIA Rail. I need to go over to Miami to ride Virgin/Brightline to see how they are sometime soon.
Some observations from a 33 year Class 1 railway semi-retiree and veteran of many Amtrak/VIA and pre-Amtrak/VIA "journeys".
As I recall Superliner I was designed by Amtrak and a third party engineering firm (L. T. Klauder) and likely owned by Amtrak. Pullman Standard and Budd both bid on the Superliner I program and Pullman won; according to Wikipedia Boeing and Rohr were also sent bid invitations . I have read that some Budd patents were used in their construction. Viewliner was an in house Amtrak design (one of the managers involved in the concept development is a friend of mine) and Budd built the three prototype shells (Amtrak Beech Grove completed the interior and systems installations). Years later Bombardier had acquired all Pullman and Budd designs, and perhaps any production jigs etc. but that did not stop Amtrak biding out Viewliner I with Morrison-Knudsen winning the bid, or for that matter Viewliner II being bid on as well.
So, a Superliner III program using an updated Superliner design could likely be possible. The active Superliner I and II fleet is some 424 cars, and VIA could use over 100-150 to replace the ex-CP Canadian cars used on the Canadian and other western trains plus 30-50 more for the Ocean if a low level platform was established in Central Station/Gare Central in Montreal. So, a 550-650 car multi year Amtrak/VIA program could be conceived, and could be bigger if train capacity was increased to 1980-1995 levels. Remember, only 12-13 years separate the last Superliner I cars from the first Superliner IIs, so a program over 5-7 years would make sense with 100 cars per year. Of course the current Amtrak leadership would likely be fine replacing the superliner trains by a single car DMU with a couple of vending machines at one end.
As for Viewliner, the project went through several concept and detailed design steps. Original concepts included a vestibule near center and Superliner sized windows, and upper berth windows were added. As it progressed to detailed design a more conventional vestibule location was decided on and the carbody enlarged to the maximum loading gauge for the northeast. The upper berth windows were at first removed, and then added back (for sleeper, lounge and diner); the windows by then were Amfleet II (main) and Amfleet I(upper) for standardization. Here are the later detailed designs:
As I recall a full family was envisaged: sleeper, diner, lounge, coach, crew dorm and baggage, and was to replace all of Heritage Fleet from 1990 on. The M-K order was for 50 sleepers with 50 sleeper options, and the potential for 250 or more additional cars (the other types). In the end only the 50 sleepers were built, and none of the options exercised. The program had been delayed by a then awful 1-2 years. I recall an article in Trains back in the 1990's when the program was underway that the lounge variant included a skylight roof and a large service door for the snack bar that included a lift for both supplies and wheel chair passengers. I do recall seeing a comment somewhere that M-K built a 51st shell on their own as a test article which was a lounge with the skylight roof; never saw that confirmed, let alone a picture. Would have enjoyed riding one of those through the New River Gorge on the Cardinal
From the new Amtrak fleet plan it does seem they are intent on replacing Amfleet I with an off the shelf design and that it could replace Amfleet II, so more Viewliners do seem out of reach, which is a shame.
Keep in mind when Superliner and Viewliner were designed there were no "off the shelf" designs that could be used in the US other than Metroliner/Amfleet (and some commuter designs). There was little interest in changing European designs for the most part, and Japanese Shinkansen trains have a carbody too wide for US clearances . There was also issues with "buy USA provisions" for Federal purchases and the uncertainty of Amtrak's future. Amtrak was able to bring on the 6 ANF RTG Turboliners but the additional Turboliners were built by US aerospace supplier Rohr (7 RTL trains built, 7 more planned but cancelled by Congress, even more above 14 sets were planned). Superliner and Viewliner are good and successful designs (sure, there were some bugs). The big problem in the last 15 years has been elimination of a US industry base due to a lack of orders and inexperienced builders winning bids (CAF-Viewliner and stillborn Sumitomo regional bi-level). It will be interesting to see if the new "off the shelf" designs are as durable and long lived as Amfleet, Superliner and Viewliner.
Walter