After a search there appears to be very little in the way of drawings for the Avro Shackleton,the only flying model was the one done as a plan by APS,although dated it does provide the basics for parts to scale up although being a control line model it is quite beefy in construction,there is however another avenue open to you and that is to purchase an example of a plastic kit done for the Mk.3 and use that as your plans basis,having done this several times myself including building a Lancaster it works well,after all you have all of the shapes and cross sections that you need to make drawings for your model.
I suggest that if you have not made any scale models before,then start with a simpler subject than the Shackleton,you have picked one of the most complex of design subjects to make as a flying model ! so tread carefully to avoid any pitfalls and start with something simpler,likewise when you come to be ready to fly,get proper instruction on a trainer model first and get some flying hours under your belt,there was in fact a radio controlled model of the Avro Shackleton shown on the cover of a 'Model Aircraft' magazine I think around the 1960 era,off hand I cannot remember who built it ? but it was shown in South African Air Force colours and looked very impressive indeed.
The original Frog Shackleton kit was taken over by Revell who revamped it,you can till pick them up from specialst model shops,keep your eyes open.
