Seems like that should be enough thrust to get it going off the pad. I can attest that an F15-0 to F15-8 in one of those is not enough speed off a 5' rod. I flew one and it staged nearly horizontally. Never saw it again, though it was entertaining.

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Paul
If we weren't all crazy, we would go insane - Jimmy Buffett
NAR #87246 www.wooshrocketry.org