I made basically the same set as
@Matthew, and then modified a little later on.
Edit: I did use the slotted angle iron as mentioned by Matthew above. It seems strong enough.
The stakes are 18"L x 1/2" dia. steel, and have either a J-hook at the top, or a T.
The J-hooks have an 8"L x 3"W x 1/16" diamond shaped plate welded to them for more pull resistance in wet/soft ground.
Later on, I questioned whether a piece of the angle iron welded to the stake would have been better, just in case the plates get turned sideways in the ground when being pulled. But with the J-hook top, probably not a major concern.
Also wondered if just a piece of angle iron sharpened at one end could be used instead of stakes. Or a couple of them with a chain or maybe a bolt between them. Could be hard to drive in unless it's soft ground, but that's also when they would be most needed.
I made 1 set for each wing and 1 for the tail = total of 6 J's, 6 T's. That lets me use various combinations of stakes per tiedown depending on ground condition.
I always use at least 1 T per set, just to make sure the angle iron doesn't work free from the J-hooks. It would likely have to get buckass crazy for that to happen, but I do it nonetheless.
I haven't re-weighed with the plates added, but the whole kit weighed in at 10lbs, all steel, not including rope.
Probably 2-3 lbs for the plates, So, not a lightweight solution, but that's not really what I was going for at the time. I had most of the materials and was in a hurry. I'm sure aluminum could be used, at least for some of it.
If any of the engineers on here want to chime in, It'd be great to have some info on strength equivalents/sizes or thoughts.
I used the kit at Oshkosh in 2021 with only 2 J stakes on each set, and at that time had no diamond plates welded on. It held fine during two of the storms that flattened some tents. The ground seemed pretty dry below the surface. So with the diamond plates added, and/or an extra stake, it should work good.
I don't have a very good picture handy, but a crude drawing:
At Osh (not a good view)
Also, in the video above posted by
@rwellner98, two moment's (4:22, and 4:30), illustrate driving the stakes at angles, which I feel is important, but I've seen others drive them vertically. Especially bad if close to the plane.
Haven't been to SNF yet, but seems to be a similar list as OSH so far.
I'll add Ibuprofen and an energy drink to the list. It's a magic combo after a long morning of walking.
And don't forget the gust lock