by sonex1374 » Wed Jul 12, 2017 11:00 am
Rich,
I agree that having a ballistic chute adds a unique degree of safety that cannot be replicated by most other means. But, as others have pointed out, the chute is a compromise. Is the risk added by the chute, the weight, and complexity of integrating into the exiting design worth the safety benefits? Everyone calculates this sum differently. What you are hearing is that many people do the math for a Sonex and conclude that it's not a good tradeoff.
Looking back at many of the recent accidents, both fatal and non-fatal, I have to wonder how a chute would have changed the course of the accident, or the outcome. Several accidents were initiated by power interruptions (low power output, surging, or total loss). In those cases, either the plane landed under control and the pilot walked away, or there was a loss of control with serious injuries. Would a chute have changed the outcome? Unless the chute was activated at first indication of a problem, many cases it would not. This is largely due to the fast-paced nature of how the incident unfolds.
Let me pose this question to you. If you were making a landing approach and just as you were turning base the engine quit, would you immediately pull the chute? You've only got perhaps 20 seconds until you'll be on the ground, and things are going to happen fast. If you were on initial climb out at 300 ft and had a problem, would you pull the chute? I think many people will agree that a chute might not help in some of these situations. Will the chute help in some cases? Yes. But again, everyone does the math differently and this effects the outcome of the tradeoff equation.
As a community of Sonex enthusiasts, the members of this board have largely concluded that the tradeoffs and compromises that Sonex designed into their airplanes align with their personal criteria. They're understandably inclined to "side" with Sonex on the issue of the relative value of a chute. This doesn't make other designs or approaches invalid, just not selected by this group. Times change, and opinions change, and so might the value equation, especially as the "costs" of chutes continue to decrease. Maybe someday it will be such that the value equation will work out differently.
Jeff