Most pilots think a good start is measured by where you cross the 45-degree line. JJ Bruno thinks that number arrives about eight seconds too late. A wingsuit BASE jumper since 2018 and a software engineer by trade, JJ has spent this summer jumping by day and coding by night, building ExitEval — an app for evaluating exits, laser profiles and FlySight tracks in the field, and reviving the exit map the community lost when BASE Beta went offline.
In this episode of Leading Edge, JJ explains why the cross-one-to-one is a lagging metric for modern suits, the earlier numbers he watches instead (first one-to-one and the "40X"), what energy management actually looks like on a FlySight time chart, and the biggest mistake he sees pilots make when reading their own data: ignoring conditions. We also get into cherry-picked tracks, the "worst starts" he keeps on his phone as a benchmark, preserving tribal knowledge in a more fragmented sport, and where to draw the line on documenting sensitive exits. The takeaway: "I kinda use the data to help push me in the right direction, but it doesn't always have the final say."
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