peterconquest3
lvl.2
United States
Offline
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I'm a Lucky Newbie!
My first couple of Inspire1 flights I tested the RTH function at the top of my driveway (a 50 foot wide tree-free area). It was really pretty accurate. Within about 3-10 feet I'd say. I then tested setting a new home point about 10-20 feet away where the bird was hovering, and that seemed to work well too. So I figured I could pretty safely walk down to the bottom of my long curved descending driveway (about 400 ft away), and take-off from there, and walk back up the driveway during the flight, piloting my Inspire out in front of me, and set a new RTH point back at the top (just below the hovering bird), and land there.
So as I walked back up my driveway I did just that... hovered the Inspire just out in front of me, at about 8 ft off the ground, practicing my novice control of this awesome craft. A few minutes later I was back up at the top of the hill. I centered the bird over the landing area at about 10 feet up, pressed the "set RTH" in the Pilot App (to set a new RTH where the bird was), and then pressed RTH...
Well surprise!.. It shot straight up in the air and took off in the direction of the bottom of my driveway... and directly towards the trees between me and the bottom!! Just missing the first tree by about 3 feet.
So I'm running down the driveway chasing it, but then it disappears behind another tree and I can no longer see it! I'm thinking all the worst now. I hurry towards the original take-off point, and just as my view becomes unobstructed, what do I see?... My new Inspire 1 calmly landing in nearly the exact spot that it took off from! Wow, lucky me!
OK, so you more experienced pilots are saying... why didn't I just cancel the RTH by pressing the button again & take control? Well, I am able do that better now (now that I have a few dozen flights under my belt to get used to it)... but at that time, being a newbie, and being that it all happened so fast, I thought I better not try anything else and risk steering it into the trees, or worse. I was pretty sure it was heading back to the take-off point, and the Inspire seemed a better pilot than me... so I let it do it's stuff and hoped for the best.
I have since increased the RTH altitude to 80ft (instead of 60ft), to insure it clears any trees on my property by a wider margin. And I am going to do further tests in a wide open field to try to determine why it did not set the new RTH location just below the hovering bird as it seems it should have.
On further testing I find that my RTH is not as accurate as my first tests seemed. I'd give it (+-) 20 feet or so. And thanks to steve2909 for the helpful information... that if the "craft is within 20m of you... it will just land where it is". And that... "outside of the 20m zone it will rise to the height you set and then return to the home point". I can't recall reading this in the manuals anywhere, but it's great to know! And that would explain that a lot of my initial tests were in error, because I was not allowing enough travel distance for the bird to RTH properly.
Additional testing - it seems possible that originally I may not have noticed an error message that now sometimes appears... "unable to set RTH". Perhaps it did flash this message and I missed it. So even tho it did not do as I expected at that time, the bottom line is that DJI and the Inspire's RTH helped save my aircraft from this newbie! So that's one point for DJI, and -0- for me! Maybe DJI can add a loud tone to the alert to help make it more noticeable.
- It's not the destination... it's the journey. |
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