It may not be rocket science, but it's still science.
I'm not an engineer and don't play one on TV but...
If you could come up with a titanium or aluminum tube. You could use it with an ultralight stake like
so the whole thing comes apart for packing while retaining the surface area resistance of the V shaped stake.
There are plastic versions available but I would question their strength vs weight.
hammock [ham-uhk] noun
Man's successful attempt to sleep on a cloud
I've seen this idea before. The stake was made of steel bar, bent like you say, and was huge if I remember correctly. I think it was used for one of those circus sized tents. I can't find an image on Google though.
I sort of think the fulcrum point is at ground level?
If the hole in the boom produces a weak point consider making something shaped a bit like an F. Imagine for example a pipe wrench laid on the ground and pushed over so the stake comes up between the jaws. If you were to then pull up on the end of the handle it would transfer the torque to the stake. A lot of Tree Stands also work like this and some weed pullers and post removers for tractors.
For the sake of argument, the fulcrum point will be at the highest point that the soil has the strength to support the stake and not allow it to "cut in" any farther. At least that's my story and I'm sticking to it.
So why not just use a decent sized rock or log placed on the line directly in front of the stake, therefore changing the direction of the force on the stake from vertical to horizontal? This would alter the direction of the stake on the ground as the fulcrum would move up to ground level and therefore the ground behind the stake would be significantly greater (roughly tripled assuming 45* angle) so a much greater force would be required to cause the stake to launch on it's own.
It is truly UL as you don't have to carry the rock or log with you, simply pick it up at the campsite. Also this has been done for years with success by many people. All you reall need is an extra 6 inches of guy line.
Freaky timing, I just made some of these at work.
5mm Dia. High Tensile Stainless Steel
Depending how they go, I may lengthen the top as per op.
For me, I think they will pack ok in a custom sack, sort of like a sock with the ankle bend. All nested together.
I dream of a better tomorrow, where chickens can cross the road and not be questioned about their motives.