OS Engines,
I am in the process of finishing a model started some time ago and I need help in the engine selection. Tha engines were the main reason I put the model asside but now I am determined to finish it.
The model is of a JU52 a German Tri-motored transport designed in the 1930's and used extensively by airlines in a lot of countries and the German military.
The orrigional plans call for a .61 engine in the nose and two 1/2 a's (.049's) on the wings. The .049's were to simple to be bolted to the wing nacells and with there own fuel tanks and no rc carp aparently just run full throttle, probbably mostly for show. I'm not sure what would happen when one quit.
The model was built this way and would require some rebuild of the wings and nacelles to add glow engines now, but it could be done.
My problem is I do not fell that the .61 engine in the nose will be powerfull enough by itself and I do not know how to determine engine sizes for a model other than when building a kit useing the kit manufactures recomendations. There must be some guidlines for matching engine sizes to models I'm hopping you can help me with my engines,perhaps with a sugestion for the fuselage engine or perhaps a sugestion for the three engines. I have been thinking about a glow engine in the nose and two electric motors on the wings as this would require the least modifications to the wings and nacells.
The model has a wing span of 96 inches, a wing area of about 1130 square inches. and it weighs now without anything in it no electronic,batteries,reciever,servos etc. I expect a weight of about 13 pounds, but if any electric batteries are needed mabe as much as 15 pounds.
I would really appreciate your help. If it maters all but one of my model engines are OS and I have a new in the box .61fx .
Thank you for your help