this topic begs the question - do Estes rockets actually reach the altitude maximum listed on the kit package? I think what we are discovering is that they don't because we have flown a Blue Ninja on a D12-5 about eight times in a year, at least, and got 250-270 feet at 60 deg. F dry air. The 2007 catalog says max altitude for the Blue Ninja is 700ft. and lists C11-3 and D12-3 as the only engine options.
I have two altitracks and love them keep them in the range box and use them to when i have a few people extra. or with the scouts
Honestly, you should be getting quite a bit higher than that. It may not hit 700, but a D12 is enough power to get a blue ninja sized rocket to at least 500, despite the plastic fin can.
ok, we are using the small field calculation: base = 250 ft, times tangent = altitude, then divide the altitude by 2. With this last Ninja flight the angle was 65 deg. --> 2.14 tangent times 250ft. = 535ft. Dividing this by 2 is 267.5 feet.
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