I am a new to yuneec but have has several DJI drones. Today when flying the drone decided to get a mind of its own and brushed a tree limb but kept flying. Than it decided it wanted to land with the landing gear up and tipped on its back two rotors and stopped them but the others kept spinning. I tried to shut it down but would not power down until I pulled the battery. I tried to fire it back up and I have red flashing lights on the two back rotors. The same thing happened yesterday but I was able to regain control and had no issues. Any advice ?
Good evening all! A little help please
- Thread starter Demoman
- Start date
What Yuneec model were you flying?
Don’t fly into trees
, lower the landing gear before touching down ?
Don’t fly into trees
, lower the landing gear before touching down ?
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My take on this is, don't fly a Typhoon H except in wide-open spaces, over trees, not under or near them.
Make sure you've got plenty of GPS showing, 15+, and wait patiently until the controller and the drone get them locked in, which can take several minutes or more if it's been a while since they were last flown. It's easy for a drone to drop into a controller or GPS 'shadow' and skitter a few feet or yards while trying to get control.
DJI Inspires will lower their gear when they start a landing sequence or get close to the ground, Typhoon Hs gear is controlled by the switch, doesn't lower automatically. Make sure obstacle avoidance is disabled at landing.
Practice landing smoothly, gently, and without hesitation.
I love my Typhoon Hs, their CGO-ET is a relatively inexpensive thermal solution that does what I need, the CGO3 is a fine 4K camera. But, I only fly them in open spaces, over trees, and use something else for working around houses and under trees.
I hope this helps?
Make sure you've got plenty of GPS showing, 15+, and wait patiently until the controller and the drone get them locked in, which can take several minutes or more if it's been a while since they were last flown. It's easy for a drone to drop into a controller or GPS 'shadow' and skitter a few feet or yards while trying to get control.
DJI Inspires will lower their gear when they start a landing sequence or get close to the ground, Typhoon Hs gear is controlled by the switch, doesn't lower automatically. Make sure obstacle avoidance is disabled at landing.
Practice landing smoothly, gently, and without hesitation.
I love my Typhoon Hs, their CGO-ET is a relatively inexpensive thermal solution that does what I need, the CGO3 is a fine 4K camera. But, I only fly them in open spaces, over trees, and use something else for working around houses and under trees.
I hope this helps?
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If you're experienced with the H you can fly just about anywhere! Flying for over two years now. GPS 11+ on controller,12+ on The H.
Everybody has their own minimums on GPS, and I know what works for me.
Everybody has their own minimums on GPS, and I know what works for me.
PatR
Premium Pilot
Perhaps more practice flying. If you had that capability you would have been able to fly under trees with full control. Better still you might have even turned the GPS off to prevent potential loss of sat signal drift.
Rarely do drones run into things when enough distance separation is maintained and control input exercised. A drone is inherently stupid, it only does what it is told to do. The operator need not be on the same level.
Rarely do drones run into things when enough distance separation is maintained and control input exercised. A drone is inherently stupid, it only does what it is told to do. The operator need not be on the same level.
If you select "Home" the gear will extend during the final descent. If the H enters auto-return (RTH) it will extend the gear as well.
It's confusing that no response from anyone so far tells you that you HAVE TO sit for minimum 13 minutes to get a complete GPS almanack update! It is NOT enough to see 10-14 sats on the ST16 and H, and you never see they are locked. You have to wait min. 13 minutes - or fly into trees!
Is there anywhere it says you have to wait 13 minutes or more? Everyones experience will be different. There's nowhere I can see GPS updated? If your up to 15 on each and locked is displayed, good practice to wait a few minutes before takeoff. Depends how long it's stood idle too, which may mean a few more minutes for safety sake.
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Mrgs, you can't see anywhere that the sats are locked, just "found". Its up anybody to belive that the sats are locked when you see the nbrs on the ST16.
Where do you se the word "locked" is displayed in the St16?
The TTFF is commonly broken down into three more specific scenarios, as defined in the GPS equipment guide:
- Cold or Factory: The receiver is missing, or has inaccurate estimates of, its position, velocity, the time, or the visibility of any of the GPS satellites. As such, the receiver must systematically search for all possible satellites. After acquiring a satellite signal, the receiver can begin to obtain approximate information on all the other satellites, called the almanac. This almanac is transmitted repeatedly over 12.5 minutes. Almanac data can be received from any of the GPS satellites and is considered valid for up to 180 days. Manufacturers typically claim the factory TTFF to be 15 minutes.
- Warm or Normal: The receiver has estimates of the current time within 20 seconds, the current position within 100 kilometers, and its velocity within 25 m/s, and it has valid almanac data. It must acquire each satellite signal and obtain that satellite's detailed orbital information, called ephemeris data. Each satellite broadcasts its ephemeris data every 30 seconds, and is valid for up to four hours.
- Hot or standby: The receiver has valid time, position, almanac, and ephemeris data, enabling a rapid acquisition of satellite signals. The time required of a receiver in this state to calculate a position fix may also be termed Time to Subsequent fix (TTSF)
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That's my English. Ready is on the display. Part of advantage of Eu UK software, takes such a long time to get Fpv you'll half way there to getting the Almanac updated, few more minutes checking St16 display and copter, checking my surroundings and your good to go. I just take my time before I take off, those minutes tick by quick enough.
Mrgs, you can't see anywhere that the sats are locked, just "found". Its up anybody to belive that the sats are locked when you see the nbrs on the ST16.
Where do you se the word "locked" is displayed in the St16?
The TTFF is commonly broken down into three more specific scenarios, as defined in the GPS equipment guide:
Many receivers can use as many as twelve channels simultaneously, allowing quicker fixes.[1] Many cell phones reduce the time to first fix by using assisted GPS (A-GPS): they acquire almanac and ephemeris data over a fast network connection from the cell phone operator rather than over the slow radio connection from the satellites.
- Cold or Factory: The receiver is missing, or has inaccurate estimates of, its position, velocity, the time, or the visibility of any of the GPS satellites. As such, the receiver must systematically search for all possible satellites. After acquiring a satellite signal, the receiver can begin to obtain approximate information on all the other satellites, called the almanac. This almanac is transmitted repeatedly over 12.5 minutes. Almanac data can be received from any of the GPS satellites and is considered valid for up to 180 days. Manufacturers typically claim the factory TTFF to be 15 minutes.
- Warm or Normal: The receiver has estimates of the current time within 20 seconds, the current position within 100 kilometers, and its velocity within 25 m/s, and it has valid almanac data. It must acquire each satellite signal and obtain that satellite's detailed orbital information, called ephemeris data. Each satellite broadcasts its ephemeris data every 30 seconds, and is valid for up to four hours.
- Hot or standby: The receiver has valid time, position, almanac, and ephemeris data, enabling a rapid acquisition of satellite signals. The time required of a receiver in this state to calculate a position fix may also be termed Time to Subsequent fix (TTSF)
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You do not have to wait 13 minutes unless it's brand new out of the box or hasn't been in use for an extended period of time.
As mentioned everyone has their own opinion when it comes to acquiring GPS.
Photo and I have had this conversation recently and disagree immensely!
As mentioned everyone has their own opinion when it comes to acquiring GPS.
Photo and I have had this conversation recently and disagree immensely!
Sure, most droneflyers says that more than 4-5days not in the air requires 12,5 minutes idle. But ofcourse it's a personal choice how safe you will be. I care only about my own saftey and drone... and try to give advices from others experience. I don't prohibit other pilots to smash into trees... Exact as you say AH-1G
: "As mentioned everyone has their own opinion when it comes to acquiring GPS"But real GPS experts are worth to listen to... like:
A GPS structure has a basic format of a 1500-bit-long frame made up of five subframes, each subframe being 300 bits (6 seconds) long... A complete data message requires the transmission of 25 full frames.... This gives 750 seconds to transmit an entire almanac message (GPS). Each 30-second frame begins precisely on the minute or half-minute as indicated by the atomic clock on each satellite. Satellites and GPS are science, not toys.
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I'm a noob here but am amazed nobody asked what mode you were flying in? Or, to share a telemetry file?
Sounds like a nasty few moments though. Sucks when your craft seems to get possessed. Last time that happened to me with a TH it turned out I had inadvertently toggled into Smart mode (winter gloves make for clumsy flying). About crapped my drawers when the aircraft started going every way except the one I wanted. It was some tight quarters too.
Good luck!
PatR
Premium Pilot
Mode should not really matter. We don’t need functioning GPS to fly with accuracy. GPS is both an assist and a crutch. If we can’t fly accurately without GPS we don’t have our piloting skills together yet.
"Enough" is not an exact number. 12.5min (760sec) are the exact technical time to get the almanack 100% complete - if you haven't been flying 3-5 days.
I take it you must not be English and understand slang, "The minutes tick by soon enough" meaning it's surprising how time flies. Those minutes are eaten up quickly. 12.5 minutes I'll get an Atomic clock to measure it accurately next time.
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