Let's talk production a bit.
Assuming Dornier's contract to build the Do17 (the He111 gets some of those resources too) is not made so as to free up resources for the Do19, plus the resources used for the Fw200 perhaps as well as some of the flying boats that aren't needed now that there is a land-based reconnaissance aircraft, which was superior to the flying boats, production of the Do19 would be higher than the FW200, especially as it would be lighter than the Fw200 even with further development.
I think we agreed that the Do19 would be viable for production by early-mid 1939. That gives time to change the cockpit and tail assembly, as well as modify the fuselage to expand the bomb bay, add more fuel tanks, and adapt the turrets to the smaller, more efficient ones that were available by 1939. The modifications reduce the crew to 6 or 7 depending on whether they want a dedicated nose gunner or not.
With the resources available in the early months of production I think 10 aircraft a month to start is viable and would increase as experience is gained producing the aircraft. Perhaps 15-20 a month is possible by September 1939. The first Geschwader would of course be a naval recon group that would be operational in time for Weserübung, the invasion of Norway. OTL the FW200 took stiff losses there, so perhaps 10 or so of 90 authorized aircraft are lost/written off.
I think once the war starts Wever, if he is still alive, would want a strategic bomber Geschwader and would start to form one once war is imminent. Once war is declared the Do19 project would likely got a lot of resources that IOTL the FW200 didn't get, because the Do19 was adaptable to strategic bombing. So by 1940 perhaps 50 or so a month is possible if multiple shifts are worked on existing lines, while new lines are opened up, as the He177 won't be available for years, so 'use what you've got' would be the mentality.
Plus by 1940 I think a further modified Do19 would be available, as testing and development would continue after production is authorized. The new version would probably be optimized for strategic bombing, so would have a deepened bomb bay allowing for larger payloads. These would appear in mid-1940 on the front line.
Production in 1940 should be high enough to have 1 dedicated naval squadron of 90-120 Do19s and 1 dedicated strategic bombing squadron of 90-120 aircraft. As production is increased by adding new production lines at the cost of not producing the Do217 in 1940-1 and phasing out any other Dornier product whose role can be taken on by another aircraft, plus the resources saved by not producing/tooling up for the Me210 in 1939 before it was deemed ready for production (OTL not until 1943 as the Me410). That means quite a bit of resources would be available for the Do19 without hurting the He111, Ju88, or any fighters (except for the Bf110 maybe).
So I think it is viable to say that by 1941 monthly production can be around or over 100 aircraft per month. That should be enough to cover training, replacement/attrition, and expansion to 4-5 or more Geschwader of 90 aircraft each. Let's say two naval squadrons of 90-120 each and 2-3 strategic bomber squadrons of 90 each.
Through 1940 there would be one oversized naval Geschwader and two normal sized strategic Geschwader by October. The first strategic Geschwader is active, if formed around August-September, by May-July. It takes part in either the Battle of Britain and/or the Blitz. The second is active by October, so only takes part in the Blitz. Perhaps the third strategic Geschwader if ready in February 1941?
The second naval Geschwader is probably ready by October-November.
The Naval version would probably have the less demanded Bramo 323 while the strategic version has either the DB 601 or Jumo 211. Eventually as Jumo production ramps up the naval version gets the Jumo 211 too.
As far as the payload goes, I think the first production variant could carry 4,000kg, with the bomb bay also being able to carry fuel tanks instead of bombs for long range missions that the naval unit would be on.
The second modified version IMHO could carry 5,000kg with a deepened fuselage like Dornier was able to do with its Do217.
This second version the Do19B would then be able to carry two 2,500kg bombs as a max internal payload or have even more slots for fuel tanks than the Do19A.
Further modifications would improve the wings, which were drag heavy, but carried fuel tanks; I think they fuel tanks would be moved out of the wings to make they less bulky. Perhaps this would be with the Do19B, as from October 1936-May 1940 would be enough to for major redesigns and development testing. That would all improve the range and speed.
The Do19 could end up looking more and more like a 4 engine Do217 with further modifications, though with some important differences.
So what do you all think, is this feasible?