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Aerial Photography and Video > CAPTRON HeliCommand Profi - GPS Autopilot System Review
 
 
Vortex Aerial
Veteran
Location: Huntington Beach Ca

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Can anyone comment on the effectiveness of altitude hold while in FFF.

(an example would be using the GTH function when the heli is too far out comfortably fly back)
11-04-2009 08:52 PM
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daytonabeach
Elite Veteran
Location: Oslo, Norway

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FFF, GTH?

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
11-04-2009 08:55 PM
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Vortex Aerial
Veteran
Location: Huntington Beach Ca

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Fast Forward Flight.......Go To Home.
11-04-2009 09:00 PM
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nooobs
Elite Veteran
Location: Toronto, Canada

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Quote 
How about taking advantage of the nice radios most of us have and jusst make different setup programs, and switch between the desired needs for each specific type assignment, one for work over water, once in open landscape, and one for tight areas with many obstructions.
Will you still be choosing just hover then?

Exactly. CF cards are cheap these days... filler' up!

I'd set it to a hover if landings are hazardous.


Quote 
Ross, if you program it to stay put over water, how do you expect it to come down again then?

Reboot the TX.


Quote 
Okay, that aside, what are the most likely situations we can get into a failsafe?
Temp loss of tx signal, ok, no sweat.
Loss of power in tx or rx, what do you do to regain control, and how do you get it down/back again?

Loss of power to TX? Your radio will be beeping like crazy before you lose total power which should give your senses a hint...

Loss of power to RX? That's why I run off from the main packs. Motor will die first before the RX.



Quote 
Ros, how did you test the failsafe function you assigned before taking it up?


You have to test it outside as you'll need the GPS signal.
You don't need to power up the motor.
Apply some cyclic and turn off the TX.
You should see the LEDs on the GPS indicate FACE home if you activated this in your failsafe settings.
You should see the tail rotor move as well for FACE home. This indicates the heli trying to spin around. So this means move away from the location you initialized the GPS from.
11-04-2009 09:09 PM
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daytonabeach
Elite Veteran
Location: Oslo, Norway

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Quote 
You have to test it outside as you'll need the GPS signal.
You don't need to power up the motor.
Apply some cyclic and turn off the TX.
You should see the LEDs on the GPS indicate FACE home if you activated this in your failsafe settings.
You should see the tail rotor move as well for FACE home. This indicates the heli trying to spin around. So this means move away from the location you initialized the GPS from.

So you trusted it work in the air as well the first time, or were you sweating buckets before you switched the tx of?

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
11-04-2009 09:18 PM
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daytonabeach
Elite Veteran
Location: Oslo, Norway

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Vortex, i would say it holds the alt very well, with or without gps, its performs the same in alt mode.

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
11-04-2009 09:19 PM
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nooobs
Elite Veteran
Location: Toronto, Canada

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Quote 
So you trusted it work in the air as well the first time, or were you sweating buckets before you switched the tx of?

50/50.
11-04-2009 09:27 PM
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Seablade
Key Veteran
Location: floating around

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Quote 
Steve, what radio are you using, and how do you program it to enter face home and landing?

Since I’m down to one heli now, a “model “ saved for each flight condition is the best and easiest way to handle the location. Plenty of room on the radio!
Using the 10C right now as it’s France legal. I haven’t set it up yet as I’m a bit busy on other projects. Where there's a mix there's a way!
I’ve got a 12FG which I can’t use as it’s made for the US market. I just do not like the feel of the FG in my hands so I’ll probably sell it and see about trying a 12z in a few weeks to see how I like that. Then I’ll have to get that re-set to France specs, but I’ve got to send it into Futaba France to do that-if they’ll do it. Just buying a French spec TM will not work, the Tx has to be re-set.

"Vini, Vidi, Velcro"
11-05-2009 12:20 AM
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daytonabeach
Elite Veteran
Location: Oslo, Norway

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Anybody had the opportunity to test a flybarless system when the rigid programming fails or fall out?

Just curious on how creative you have to be to come down the cheapest way

Im referring to the safety feature in the new profi...

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
11-07-2009 09:48 AM
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nooobs
Elite Veteran
Location: Toronto, Canada

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Quote 
Anybody had the opportunity to test a flybarless system when the rigid programming fails or fall out?

You go first!

You should be able to land it still.

...and that's if you have an H1 set-up.
11-07-2009 09:54 AM
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daytonabeach
Elite Veteran
Location: Oslo, Norway

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LOL

Hmm, dont i have H1?

Another thingy, i just did a side by side comparison on the profi gps signal vs seagull gps signal, and the profi seems to have a much poorer signal strength.

While im receiving 6 satellites on the profi, im receiving 8-9 with the seagull with a dop value of 0.9

You might wanna ask me this, where is your seagull antenna, it is 10cm longer back on the boom from the profi antenna, yes ive also tried to unplug to the seagull antenna to check if it affects the profi reception, but not at all...

What do you think, poor antenna in profi or extremely strong one in the seagull?
The funny thing is that i get the same signal strength on the seagull without the external antenna on the boom, just with the main unit (red plate) fixed vert on my frame, as if i really dont need the external

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
11-07-2009 10:47 AM
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Seablade
Key Veteran
Location: floating around

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Interesting on the number satellites received.

Quote 
The funny thing is that i get the same signal strength on the seagull without the external antenna on the boom, just with the main unit (red plate) fixed vert on my frame, as if i really dont need the external

My handheld Garmin works upside down, face down, right now inside a fiberglass boat with two decks above the handheld.
I'm assuming for the money paid for the Profi GPS we are getting an antenna equal to or better then the other manufacturers???

I did notice that my Eagle Tree gps only received signal while on the bridge and not below decks.

"Vini, Vidi, Velcro"
11-07-2009 01:32 PM
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rerazor
Elite Veteran
Location: Mich.

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What happens on the Profi if you loose GPS signal? I assume it goes to Attitude mode?

Robert
N.A. DJI Distributor
11-07-2009 01:39 PM
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Seablade
Key Veteran
Location: floating around

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I just quickly looked at the GPS manual and it did not mention loss of gps signal except in this statement on page 14.

Quote 
Without GPS reception the compass uses stored values
(EEPROM) for the last received GPS position in order to optimise tilt compensation and magnetic declination."

This is not for "Face Home", this is only to "optimise tilt compensation and magnetic declination" to hold orientation which I would also say is an "Attitude" mode.

"Vini, Vidi, Velcro"
11-07-2009 02:08 PM
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daytonabeach
Elite Veteran
Location: Oslo, Norway

My Posts This: Topic  Forum
If the profi looses gps signal it acts like a regular profi with all the stab features active like alt, sensors pos and hor mode on.

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
11-07-2009 02:08 PM
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Seablade
Key Veteran
Location: floating around

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so then in Profi only operation in case of loss of GPS signal you also loose the Fail Safe features.

"Vini, Vidi, Velcro"
11-07-2009 02:13 PM
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Seablade
Key Veteran
Location: floating around

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I'm thinking you should see the loss of GPS signal in the Eagle Tree OSD, but if the antenna receives signal with different sensitivity then what the Profi receives and what the Eagle Tree receives might not be an indication of if you've lost GPS signal to the Profi.

"Vini, Vidi, Velcro"
11-07-2009 02:23 PM
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daytonabeach
Elite Veteran
Location: Oslo, Norway

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Ive programmed the seagull to sound when under the min amount of satellites, i can take the difference to the profi in consideration and set the warning limit on the seagull after that instead

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
11-07-2009 04:31 PM
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daytonabeach
Elite Veteran
Location: Oslo, Norway

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a little OT, but whats in your opinion the absolutely lowest voltage you can fly with on the rx batteries, i mean before it starts to get close to any real critical point?

I know the Profi switches of below 3v, but when do you get close to reach those values, when batterys low and making a radical manoeuvre on top of that?

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
11-07-2009 04:36 PM
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fergus
Key Veteran
Location: Ireland

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Quote 
I know the Profi switches of below 3v, but when do you get close to reach those values, when batterys low and making a radical manoeuvre on top of that?

If profi operates down to 3v your servos will have gone out before it. Using a BEC then your rotor head will have stopped turning before that as well

If using an unregulated voltage (direct battery connection) then I would consider switching to a regulator or BEC setup.

Regards

Fergus
11-07-2009 04:54 PM
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