While I was tweaking, I replaced the thick balsa coupler with a thin plywood bulkhead/cardboard tube coupler combo, thereby shedding some weight. The improved Mark 1 design shows 80 feet play room with just 2 D12 motors. If I watch the weight, I may be able to pull this off with just those motors rather than going for broke with the full 2xD12, 2xA10 cluster. That's good, because igniting 2 motors is easier than lighting 4. The big unknown here is how much weight the primer/paint will add.
|The tweaked Mark 1 (click to enlarge). I is much happier!|
|Mark 1 parts.|