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Home✈️Aircraft🚁HelicopterAerial Photography and Video › Extreme danger DJI NASA-H
01-11-2013 06:17 AM  7 years ago
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3DManA1

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Extreme danger DJI NASA-H
I can't believe DJI selling a product that in fail safe keeps an out of control helicopter in the air no GPS.

Can you picture flying your helicopter at a hundred feet in the air lose radio contact and the Heli hovers in the air stabilized yet out of control. The wind blows it into a Neabor hood where it falls out of the sky blades spinning and lands next to a two year old on a tricycle.

This things just dangerous!!!

DJI needs to slow down test this stuff before they sell it.

I don't know how these DJI guys sleep at night.
Thunderbirds Rock and Roar
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01-11-2013 05:35 PM  7 years ago
~>Miha<~

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They don't sleep at night. They count their mountain of money.

Can't you set it to autoland in case of FS? Other DJI FCs can do this (no GPS... with GPS it would be "return to home/start" ). Autoland means very slow descend and everyone has lots of time to run away... IMHO better than the traditional primitive "HOLD" with throttle cut that RC receivers have and then falling out of the sky quickly and in any possible direction.
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01-11-2013 09:49 PM  7 years ago
Chris Bergen

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You can, if you so desire, set the failsafe so that the heli will come crashing down immediately, into god knows where.

It's completely YOUR choice.
Chris D. Bergen
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01-12-2013 12:34 AM  7 years ago
electro212

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Sweet Jesus

Take your meds

Hey Chris made it home thanks for a rockin time
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01-12-2013 02:16 AM  7 years ago
thenewguy

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If you look back before PCM receivers you had zero fail safes. If you had and communication issues the helicopter would just freak out. Not only did you have zero control it would do what ever it wanted and fly in all kinds of directions.

So with the DJI fail safe being in control of the heli and keeping it in a fairly safe condition compared to what we used to have I would say the are several steps closer to the safe side of things then we where years ago.

Just a thought about how far the safety has actually come.

Any RC helicopter is extremely dangers. It's part of the hobby we except.
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01-12-2013 03:16 AM  7 years ago
3DManA1

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I don't think you understand. It's really best that the helicopters throttle go's to zero in the case of failsafe radio out condition. The Naza stabilizes the helicopter and without a GPS the helicopter would just blow away with the wind.

I didn't see a way to program the Naza-H to kill the throttle in a failsafe condition. This is just dangerous. PCM would freek out and crash to the ground this is safer than the DJI because it will get blown across the sky stabilized it could and will cause loss of aircraft and possible danger to all around.

Just another problem.
Thunderbirds Rock and Roar
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01-12-2013 01:06 PM  7 years ago
GauchoVolador

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3DManA1,
Lucky crash affortunately.
What did exactly happen (full details) that made NAZA-H go into Fail Safe condition?
Were you flying it in Atti mode instead of GPS when it happened?
Why did you choose Atti instead of GPS for flying that high?
Im trying to get the full picture on what it happened.
Victor
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01-12-2013 04:02 PM  7 years ago
3DManA1

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It's not what happened its what could happen. I'm just warning of a potential safety problem. I think DJI should of included auto land feature for the Naza H for Safety reasons or have the option to cut throttle when it go's into failsafe.Thunderbirds Rock and Roar
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01-12-2013 04:19 PM  7 years ago
halburn

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Powell, Ohio

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solution: bring shotgun to field. Once it is a nice and stable target. You can decide where it crashes.
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01-12-2013 08:04 PM  7 years ago
R Hudson

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Why are we spending time here discussing what COULD happen? Good grief. It is helis. There are a ton of things that COULD happen. If we really want to discuss what COULD happen we had better include the possibility of a heli quickly cutting the throttle and crashing down right next to a kid on a tricycle and the Lipo bursting into flames spewing flames all over said kid on tricycle. Or it could come crashing down onto someone waiting on a street corner, knocking them over into the path of an oncoming bus. Or it could come crashing down onto a SWAT team member's head during a standoff causing the SWAT member to fire an automatic burst of bullets into a crowd of kids eating ice cream.

I personally prefer the idea of a controlled hover with a slow descent so it can be tracked and people on the ground can be warned.

Very important: Proper setup of failsafe. Plenty of people overlook the failsafe and don't know what it is going to do when in failsafe. Know your gear, have a primary and secondary bailout plan and pay close attention to your surroundings. Standard heli rules still apply here folks.

Use a receiver with "Preset Failsafe" feature, set it up correctly, and you should be good.
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01-12-2013 09:57 PM  7 years ago
3DManA1

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I like your slow descent idea that might be ok. My understanding is the helicopter hovers at the altitude it went into failsafe. Dangerous. I can see you don't like to think about much and that's ok.

Shot gun?? I'm in!!! Sounds fun. I think that's why Chris Bergen caries a side arm. Pull...
Thunderbirds Rock and Roar
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01-12-2013 11:08 PM  7 years ago
Chris Bergen

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I've never had a flyaway heli.... Just sayin' LOL

To reiterate, you CAN set up your failsafe (if you understand how it works in YOUR radio), to turn off the Naza AND the throttle.

It's up to you.

But if your intent is to simply bash DJI, then please continue.
Chris D. Bergen
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01-12-2013 11:09 PM  7 years ago
~>Miha<~

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Germany

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slow descend == autoland

posted several posts before

And no, a copter that suddenly falls out of the sky isn't better than a copter that gets stabilized and hovers away because the latter will be seen/heard by everybody and they have time to react (avoid getting hit by it). And not better than a copter that gets stabilized and goes into slow autolanding/descend.

If it has GPS it will hover in place. Best solution probably.

I have nothing against a good round of DJI bashing () but this thread is BS.
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01-13-2013 04:07 AM  7 years ago
3DManA1

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I don't think the DJI NAZA H go into a slow decent in failsafe. The directions are so bad it's really hard to determine what it does. It sounds like it hovers at the altitude that it went into failsafe.

They push these systems out so quick they never take time to give us great complete directions. All their products have poor directions.

Lets see one of you DJI reps put one in failsafe and video it so we can see what it does. No time like after the product is out to test the system.
Thunderbirds Rock and Roar
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01-13-2013 06:00 PM  7 years ago
Yeehaanow

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I'm sure it will do a slow-ish descent as soon as the batteries get low enough so that max pitch will not hold a hover.
So I think it's not so bad.

-You lose signal.
-It hovers while you panic and try to regain signal.
-You can clear the area while it hovers.
-As the batteries go flat it starts to come down.
-Chances are good that it will come down *relatively* slow and level, so as long as the area is clear, it should inflict minimal damage, and might even "land".

I HAVE had a flyaway, and I can tell you right now, I would rather see my bird stop and fall from the sky where I knew it was, as opposed to having to search an area of several square miles for it.

Oh yeah, and Helicopters are dangerous not matter what. I think R Hudson proved that!
-Tim
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01-13-2013 08:52 PM  7 years ago
jhamlinjr

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I can't believe this thread is even going on. Seriously? Do I need to remind the OP of how much money the Align APS cost me? Not only in equipment but tens of thousands if not more. Come'on dude. Do you realize what could have happened if it was a day earlier? You know how many emails I sent Jeff Fastbinder? 5 You know how many responses I got? ZERO

Sure I told a few people here and there to be careful with it and told of my experiences but dude....
HALO
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01-16-2013 02:40 AM  7 years ago
3DManA1

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Really???
Align and DJI have nothing in common. This is a safety issue. Hard to believe a fireman can't recognize a safety related problem. This comment is based on a Naza-H not a Wookong-M. I thought I'd help if you missed it. The question is do you know about the failsafe on the Naza-H if so maybe you could direct me to the part in the manual that shows the precise way to set this up. I think you will come to the same conclusion unless you don't care about safety.

Hard to believe people comment on things and they have no clue.

If you make a comment back it up with something. Video of it in action and I'll admit I'm wrong and shut the topic down.

I will admit the DJI manual leaves out a lot of important information. This is a real concern.

DANGEROUS.
Thunderbirds Rock and Roar
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01-16-2013 09:32 PM  7 years ago
jhamlinjr

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I guess you are taking a different approach than I did when something considerably more dangerous occurred in my situation.

Don't insult my ability to pick up on dangerous situations again. You don't have a clue what I've seen in my career. If you could see it would give you nightmares. My senses are much keener than yours. I guarantee.
HALO
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01-16-2013 10:10 PM  7 years ago
3DManA1

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Jhamlinjr, dude I've owned glass company's for over twenty years. You attack safety before you have a problem. There is defiantly a safety problem if failsafe works as described. I can't help it if you don't see it.

I really wonder if your even familure with the product.

But if you are show us. Put one in failsafe and show us how well it works. It's easy.
Thunderbirds Rock and Roar
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01-16-2013 10:17 PM  7 years ago
jhamlinjr

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We are on two totally different pages. No worries and hope you get it sorted out.HALO
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