I don't know what Steve presented prior to I on the helicopter.

What I presented were 3 options.

To counter fall, and ejection.

1. Rockets. (Which was asserted in flying vehicle and the plane)

2. Parachutes. (Which was asserted in my other flying vehicles idea, and the plane)

3. Exit cabin. (Which was asserted in my plane idea)

In order to use the parachutes, the blades must come off.
It may also pose threats to the passengers when the cabin is ejected.
It may not matter with the rockets.

I have drawn a details on locking the blades in to a customized
release on trigger mechanism.

See which correlates to my idea in the previous timeline.

 

I am unsure, but as I was coming up with other idea related to flight,

I may have briefly asserted, "this could be used in helicopters as well."

use the keyword "chopper or helicopter" to find this timeline, if there is.

Otherwise, see the principles of my ideas that must have been stolen after.