OK I know the DC3 was made by stretching the fuselage and increasing the wing and control surfaces of the DC2. The DC 2 was derived from the DC1 what changes were made. Thanks for your time
Sorry for this late reply, as I just saw this. I want to make it clear that I am not an expert on these aircraft, so what I am about to show you, you will need to verify for yourself. One of the best and easier descriptions that I have found is on Quora. The link is here.
There are many other websites that will also give you the dimensions of the various aircraft.
Thanks for the info, i was surprised that the dc1 was a single prototype but lead to the quick development of the dc2. And wow how low powered the early engines were. Thanks for your time