After looking at a chart for Estes on engine size/max lift weight, decided to print one of the Saturn V out and test the weight to see if it will work for a D12-3.

5-sheets should put the model around 10 oz. D12-3 says it will lift 14oz.

1/48 scale at 6.95 feet tall. Wonder how much the increase in drag will work with the 14-oz limit.

A couple of minor updates to the drawing still to go. Looking at the centering rings that give it support-can they have holes in them to reduce weight. Thinking the answer is yes. There are 5-big ones 8.25" in diameter.

Mike