They showed an auger style tiedown ... but never tested it, they only tested the spiral anchor which is NOT an equal comparison. Correct me if I'm wrong someone. I think that would have tested the best out of all of those
They are pulling directly upwards, most aircraft manufacturers tell you this is not the correct way to tie an aircraft down but for example on the left wing you should be 3 feet forward and 3 feet outward of the tiedown point, the same on the right-hand wing, 3 feet forward and 3 feet outward and tail is tiedown 3 feet backwards. This way the aircraft is supported correctly and it cannot move, especially lighter LSA type aircraft. In this configuration you are not pulling the anchor directly upwards but are instead pulling it at approximately 45° - 60° sideways and this increases the way that these tiedowns work especially the proper screw-in types (not the dog ones)
If you watch the whole video, around 3:06 he says "when we tried to pull at an angle, rather than straight up, the FlyTies did better." So they did actually test pulling at an angle, they simply did not include that test, I assume in order to keep the video short, and to get to the ultimate point they made at the end - none of these kits are up to the FAA's recommendations as far as load tolerance.
There is something to be said for ease of removal not by wind but for teardown. I used cable anchor's last year (Nelson tiedown kit) and spent about two hours cussing trying to unscrew them when I really needed to be in the air. I'm trying something else this year.
I use the EAA , homebuilt design for my a/c. It has 3 , 18 inch pins on each tie down. They take some pounding to get them in the ground but , for example, when I used them at S&F last month, they went through a much more substantial layer that was about 10 inches down! I was not there during the tornado but I could imagine that if your tie downs were not deep enough, they would not hold very well, no matter what type you used....
Test rig pulls straight up. I don't know about you, but I sure don't place the tiedowns so the load is straight up, lifting them out of the ground. Much better to have longer lines allowing the stakes to be set up wide adding some horizontal vector.
If you are going to be driving stakes in the ground, you might as well just get some rebar and cut it to whatever length you deem appropriate, bend a loop or angle in one end, and hammer it in the ground... A 20-ft piece of rebar will give you (6) 40" stakes and is cheap enough that if you can't pull it out of the ground, then just hammer it all the way into the ground after you get through and leave it there...
when i bought my airplane I asked the former owner if he has taken her to Oshkosh or Lakeland, his answer was NO!, you could be caught in a severe weather, hail or a tornado, and there will be no time for you to escape, so I will follow his 5 year old advice and fly commercial againg this year! i think he was no fool at all!!
How did you translate 65 knots of wind to 3,000 pounds of load? What direction would the load be? ( I guess it starts with 3,000 pounds of force directly down, e.g. gravity ). if the plane could climb at 65 kts - it would have and equal force upward, not 3,000 pounds up, right?
With 2999 pounds pull, my airplane would be worth less, than the pin itself. Sorry, but 65 knots or 3000 pounds means nothing without context.... On the other hand - thanks for the fair asessment. I use dog-pins with welded top. Doesn't bend out !
They showed an auger style tiedown ... but never tested it, they only tested the spiral anchor which is NOT an equal comparison. Correct me if I'm wrong someone. I think that would have tested the best out of all of those
They are pulling directly upwards, most aircraft manufacturers tell you this is not the correct way to tie an aircraft down but for example on the left wing you should be 3 feet forward and 3 feet outward of the tiedown point, the same on the right-hand wing, 3 feet forward and 3 feet outward and tail is tiedown 3 feet backwards. This way the aircraft is supported correctly and it cannot move, especially lighter LSA type aircraft. In this configuration you are not pulling the anchor directly upwards but are instead pulling it at approximately 45° - 60° sideways and this increases the way that these tiedowns work especially the proper screw-in types (not the dog ones)
If you watch the whole video, around 3:06 he says "when we tried to pull at an angle, rather than straight up, the FlyTies did better." So they did actually test pulling at an angle, they simply did not include that test, I assume in order to keep the video short, and to get to the ultimate point they made at the end - none of these kits are up to the FAA's recommendations as far as load tolerance.
There is something to be said for ease of removal not by wind but for teardown. I used cable anchor's last year (Nelson tiedown kit) and spent about two hours cussing trying to unscrew them when I really needed to be in the air. I'm trying something else this year.
I use the EAA , homebuilt design for my a/c. It has 3 , 18 inch pins on each tie down. They take some pounding to get them in the ground but , for example, when I used them at S&F last month, they went through a much more substantial layer that was about 10 inches down! I was not there during the tornado but I could imagine that if your tie downs were not deep enough, they would not hold very well, no matter what type you used....
Test rig pulls straight up. I don't know about you, but I sure don't place the tiedowns so the load is straight up, lifting them out of the ground. Much better to have longer lines allowing the stakes to be set up wide adding some horizontal vector.
The FlyTie instructions say to do exactly the test method.
If you are going to be driving stakes in the ground, you might as well just get some rebar and cut it to whatever length you deem appropriate, bend a loop or angle in one end, and hammer it in the ground... A 20-ft piece of rebar will give you (6) 40" stakes and is cheap enough that if you can't pull it out of the ground, then just hammer it all the way into the ground after you get through and leave it there...
Do this again with the Big Screw.
when i bought my airplane I asked the former owner if he has taken her to Oshkosh or Lakeland, his answer was NO!, you could be caught in a severe weather, hail or a tornado, and there will be no time for you to escape, so I will follow his 5 year old advice and fly commercial againg this year!
i think he was no fool at all!!
AVweb, your recordings are still very low volume, please fix.
Use a Heavy duty Steam Roller and Anchor Chains for Tie Downs. 😀😀😀😀
How did you translate 65 knots of wind to 3,000 pounds of load?
What direction would the load be? ( I guess it starts with 3,000 pounds
of force directly down, e.g. gravity ).
if the plane could climb at 65 kts - it would have and equal force upward,
not 3,000 pounds up, right?
Really it depends on the size of the aircraft. A larger aircraft, while heavier, will have greater surface area with which wind can push.
With 2999 pounds pull, my airplane would be worth less, than the pin itself.
Sorry, but 65 knots or 3000 pounds means nothing without context....
On the other hand - thanks for the fair asessment. I use dog-pins with welded top. Doesn't bend out !
Ok. So just buy 3 of them..use all at once,,,, problem solved
arrrhhh... don't put the stuff on the wing !!!
its his wing, he can do whatever he wants.........mind your own business !
*****