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Fatal Towplane Accident 5-9-20
On Monday, May 18, 2020 at 2:35:39 PM UTC-7, Nick Kennedy wrote:
After reading all the secondary type release options I think I'm with AS. Either have a Tost Release or a inverted Schweitzer release that could very quickly be operated electrically from a switch on the yoke or control stick.. These kiting accidents happen very fast. If the Tow pilot IMHO had a electric switch he could actuate by either a button on a switch to dump the rope this could help. I would imagine it would be fairly easy to engineer a pulling electric solenoid that is attached to the existing release cable, sister-ed on to it. When the tow pilot decides hes had enough, touch the button or slide his hand to activate a switch and release the rope quickly. Use the existing system your tug has now, just add to it. This system seems so easy maybe I could even build it in a day. Don't try and cut the rope, just release it, very quickly. Good idea? Nick T A big factor in an electric actuator is the force required to open the tow hook. It will be far more than normal, but how much? And how long of a pull? Solenoids are highly non-linear in their pulling force (it increases geometrically as the gap is reduced). I concluded that a linear actuator would be better. To speed it up just drive it with a higher voltage (it wouldn't have to run for very long). I would junk the Schweitzer hooks altogether and switch to a Tost hook. Tom |
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