Wild Wayne, This is what I was thinking right off the bat as well. The Mini is small and likely multiple times more prone to wind turbulence on the leeward (downwind) side of the sail. It likely stalled...
Crash on a sailing sailboat
- Thread starter rene strand
- Start date
drjulian
Member
Maybe setting the home point to the controller rather then takeoff spot would address the home point issue?
I'd like to know if the drone stalled when it came up on the leeward side of the sail. That's where the most unstable air would be...
I sail around tasmania wiwi5hmy M2P and the first time i tried to hand launch, which i do quite often, the bird immediately tried to go back to when i initialized the launch while still being held.
I gave up on that until I could do some tests back on land and did the following;
Held the drone roughly head height, activated the drone and then walked about 10 steps until it started to react and then just let it go.
She immediately returned to roughly the point of activation and hovered there.
This gave me confidence to launch from the back of the yacht and let it go just prior to sending her up to 30m.
After that, catching a moving drone from a moving yacht was more interesting but with gentle stick inputs is more than capable.
Not sure why the OP had issues with flying though.
I gave up on that until I could do some tests back on land and did the following;
Held the drone roughly head height, activated the drone and then walked about 10 steps until it started to react and then just let it go.
She immediately returned to roughly the point of activation and hovered there.
This gave me confidence to launch from the back of the yacht and let it go just prior to sending her up to 30m.
After that, catching a moving drone from a moving yacht was more interesting but with gentle stick inputs is more than capable.
Not sure why the OP had issues with flying though.
Flynz
Well-Known Member
Taking off is easy enough. Get someone to hold the drone at the back of the cockpit behind any stays facing away from the boat and you push up and forward. The MM will disappear at its usual speed plus the boat speed plus wind speed, so quickly. A quick turn around and start tracking the yacht. Staying high above the water will reduce risk. 20m maybe. For landing it might be best to turn into he wind and stall the yacht so there is less to take into account. Someone hold the main still so there is no flapping, you fly up close and someone pick the moment and snatch the drone, ie. grab from underneath while it is flying close. Then you hit land and wait for the engines to stop. As mentioned above the drone will try to escape so be ready. Of course rocking from the sea will make it quite ricky and you could lose a fingertip. If your yacht is metal forget it completely and launch from shore. You can follow the yacht for a good distance. Maybe stay above the mast. I have taken some great marine action shots from a km or so away. Good luck.
JustViewerFun
Well-Known Member
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I launched my MP from my friend's sailboat once, and successfully caught it myself. There was almost no wind, and we were crawling along at 1-2 knots. Takeoff was easy, but landing (hand-catching) was more difficult.
I had to turn my MP to face away from the boat, bring it in close to the starboard side while following the boat, but slightly in front of me (heading wise). The last part was to stick my right hand out to catch it while applying down stick with my left hand. As it came down, the boat drifted my hand to the drone so I could catch/grab it from underneath, on the body. Once in hand, I applied full down stick to shut off the motors. I wouldn't even dream of doing it myself if the boat was going any faster. Even when the boat seems to be barely moving, there will be the slightest drift between the boat and the drone, and that makes it challenging enough.
Anyone thinking of doing this from a boat needs to have a lot of practice hand-catching their Mavic on stationary ground beforehand. Most importantly, get very familiar with the hand-catching technique and Mavic's behavior before even thinking about attempting it from a moving LZ like a boat. Also, as jamesfrankham mentioned, have a separate drone catcher. The drone catcher needs to go through the drill with you before you launch to ensure it goes smoothly and they know ahead of time what to expect. Better yet, practice it with him/her on shore, from a fixed location until both of you are comfortable with the drill.
As far as settings go, you need to turn off landing protection just like when you would hand-catch. Otherwise, the Mavic will jump up and away from your hand as it comes under the bottom sensors. But also note that you need to have the downward sensors turned ON. When they detect that the distance is zero while applying down-stick, the motors will shut off.
One final thing from my experience, I would not attempt this again, even at 1-2 knots, without another person to catch or grab the Mavic while I pilot it into the boat for landing.
I had to turn my MP to face away from the boat, bring it in close to the starboard side while following the boat, but slightly in front of me (heading wise). The last part was to stick my right hand out to catch it while applying down stick with my left hand. As it came down, the boat drifted my hand to the drone so I could catch/grab it from underneath, on the body. Once in hand, I applied full down stick to shut off the motors. I wouldn't even dream of doing it myself if the boat was going any faster. Even when the boat seems to be barely moving, there will be the slightest drift between the boat and the drone, and that makes it challenging enough.
Anyone thinking of doing this from a boat needs to have a lot of practice hand-catching their Mavic on stationary ground beforehand. Most importantly, get very familiar with the hand-catching technique and Mavic's behavior before even thinking about attempting it from a moving LZ like a boat. Also, as jamesfrankham mentioned, have a separate drone catcher. The drone catcher needs to go through the drill with you before you launch to ensure it goes smoothly and they know ahead of time what to expect. Better yet, practice it with him/her on shore, from a fixed location until both of you are comfortable with the drill.
As far as settings go, you need to turn off landing protection just like when you would hand-catch. Otherwise, the Mavic will jump up and away from your hand as it comes under the bottom sensors. But also note that you need to have the downward sensors turned ON. When they detect that the distance is zero while applying down-stick, the motors will shut off.
One final thing from my experience, I would not attempt this again, even at 1-2 knots, without another person to catch or grab the Mavic while I pilot it into the boat for landing.
Dabrain
Well-Known Member
Been awhile that I've made a comment to you Joe, but shouldn't that really be
Dic mihi solum facta, domina, Dic mihi sloum facta. ? I know not enough room.
I don't know if you have radio transmitters on the boat or not, but if you do, it is possible that their output may have caused signal interference.
X-yacht X-55
main & head on and sailing only 1 to two knots
and at the windward side I started the mavic mini from from mid deck
@rene strand ... you've now got 8-9 days of speculation, but that will not tell you what happened & how you can prevent it to happen again.
Please share your logs, that will give you the biggest possibility to conclude this event.
Please share your logs, that will give you the biggest possibility to conclude this event.
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