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08-13-2012 12:09 AM  5 years agoPost 21
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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well, it's been awhile. Just got lazy and many times it's just to darn hot for this old man to go outside.
But here it is as it now stands:

4S Turnegy 4000mah
6.0 Lbs with every thing including Canon Power Shot SX130is
Tubular aluminum arms
NAZA flight controller
Motors Turnegy D2830/1100Kv Now Avroto 2814 Short Shaft
ESC Turnigy 25A AE-25A (Can not use programming card with this ESC)
Props 10x4.5 will try 12 inch later.
520 mm between closest motor shafts, 1020 mm across motor shaft to motor shaft. (This is the longest, but will shorten to experiment with shorter arms, my motor mounts can slide along tube so easy to try different lengths)
Flight time 8 mins down to 3.6 volts per cell
Flight current is 26 amps
Eagle Tree data logger
Eagle tree Altitude logger
Landing pads moved inward out of prop wash, will change from 6 to 3 later.
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I have the NAZA GPS unit but haven't added it yet.
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By the way, here is a great little talking timer that counts down the mins/sec. It is clear and loud so I never have to look at it for remaining time. Even if you have OSD it's nice to be reminded when the time is up.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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Other › AGL Hex multirotor Build
08-14-2012 07:25 PM  5 years ago •• Post 22 ••
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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Now that test flights have shown good stability and correct reactions I added the GPS unit and updated the software. Programmed all the setups and ready to fly, but too hot right now.


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EDIT:
That rusty looking block of steel tie wrapped to the front is my equivalent camera weight, no use busting up my camera if I setup somthing wrong.
Wiring is still not cleaned up until I'm sure everything is where I want it. Also need to add LED lights for good orientation, like my quad.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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08-18-2012 05:29 PM  5 years agoPost 23
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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Tested with GPS and this thing is increadable, holds position perfectly. A little bouncing where in manual mode it is very stable. Maybe still need to tweak gains for better stability in alt mode and gps mode.
In GPS mode you really can walk away and put down the transmitter and it just stays put (of course I really don't walk away).
Next is try RTH (return to home) but that's going to take some nerve right now, turning off my transmitter just seems unthinkable.
.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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08-18-2012 06:01 PM  5 years agoPost 24
sjgusmc21

rrApprentice

San Antonio, Texas

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GF, good to hear! I finally got mine put back together (really BAD CRASH) and maybe some flights tomorrow. Have not tried GPS mode yet, so gonna it give it a try, if everything else works out. Great job!

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08-21-2012 05:20 PM  5 years agoPost 25
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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I finally put my Hex AP to a good use. This is my chimney roof cap, it is too tall to safely get a ladder to look at it so I used my Hex. It shows what I was worried about, corrosion is starting to get to the point of causing leaks.
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Yes, that's a sprinkler head on the right upper corner, used when fires approach during fire seasons. Doesn't look big enough but that is a pasture large type, really gets the roof soaking wet.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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09-13-2012 09:14 PM  5 years agoPost 26
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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Here is a video I took today (9/13/2012) with a new fixed mount on my hex using NAZA controller. I thought the wind was calm but once above the trees you can see how much the horizon is tilted to hold it in one place, and the wind noise begins once above the tree tops.

Watch at YouTube

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Couple of spots that look like shadows, need to clean the cleans.
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Here is a chart showing altitude while videoing.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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09-16-2012 12:08 AM  5 years agoPost 27
CameraWings

rrApprentice

Austin, TX

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power distribution board comment
On the power distribution board it appears that you use the same size wire going to the battery as you have going to the motors.

Typically you should use the same size wire as the esc uses to run from distribution board to esc.

Typically you should use a wire capable of handling the combined amperage of the max draw of all motors combined from the distribution board to the battery. This should end up being approximately the same size as the wire provide on your supply battery in most cases.

Typically you should use a plug to your main battery capable of supplying the amp needs of all motors drawing at full amperage. I see many people getting away with 60 amp rated deans plugs on quads, but often that is just not enough on hex or octo. Although you posted flight amps at 26 amps, in gusting winds when climbing against the wind, amps go up significantly. As the flight continues and the internal resistance of the battery increase, the flight amps further compound. If you jump to 12 inch props will see amps go up significantly, not in hover, but it climb and in turbulence the increase will be notable.

I know of 5 expensive rigs that have gone down with very expensive cameras due to under rated plugs and supply wire. The typical failure point is solder joints on the plug or at the distribution board where the battery supply wire is soldered. One of the 5 was mine. I now use two batteries, each capable of handling the full load with size appropriate plugs. I use copper plate much as you do to handle the additional amps that pcb board was not design to handle. It was a very expensive lesson.

Though you are not carrying a full professional AP load it is still relevant to keep relative wire sizes appropriate between battery wire and wire to esc's.

I could be way off base and the photos are not illustrating the increased size of the battery supply wire. If so, it is still good for people that will be reading this to understand how important it is to have adequate wire and plugs when powering 6 or 8 motors.

I generally don't comment on other design components, but full system power failure should and can be avoided.

Again,very nice build. I really enjoy people posting their projects.

Robert

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09-24-2012 01:00 AM  5 years agoPost 28
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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Just an update on the Hex AGL unit.
Weight with camera and 4000 Mah 4S and all electronics is 6.9 Lbs [3.13Kg]
Camera Canon SX130IS weight: 10.9 Oz [309 Gr]
Battery weight: 15.7 Oz [445 Gr]
Flight time 6 mins (safe)

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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09-26-2012 07:37 AM  5 years agoPost 29
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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The Motors (Turnegy D2830/1100Kv) were getting really hot, about 70-80 C. Tried 10X4.5 props, then 12X3.8 props but didn't seem to make any difference. With all up gross weight at 6.9 Lbs I decided to use the motors Hansuff is recomending. The Avroto 2814 Short Shaft - $57.97 X 6 of these plus several sets of various props put a whack on my wallet, But I want reliability, and the Turnegy motors were great performers but way to hot in my opinion.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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09-27-2012 12:21 AM  5 years agoPost 30
bigwolf1

rrVeteran

USA

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you'll be glad you upgraded the motors. I just did the conversion kit with the same motors on my F 550. flying weight 7 pounds using 11x4.5 carbon props

MAH blade Rep
Trex700LE
Magnum fuels

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09-27-2012 12:38 AM  5 years agoPost 31
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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Thanks bigwolf1, do you have any info on how hot the Avroto 2814 get on your rig (since it is nearly identical wieght)?
Paul

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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09-27-2012 01:47 AM  5 years agoPost 32
bigwolf1

rrVeteran

USA

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barely get warm after 6 and a half minutes. I think part of your problem might be the props flexing try some stiffer
props like Gruapner or carbon

MAH blade Rep
Trex700LE
Magnum fuels

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09-28-2012 09:49 PM  5 years agoPost 33
HansAuf

rrApprentice

Gainesville, Florida, USA

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GF, replied to your PM.

Also, just a note the motors GF is using are rated for 8in max prop size. You can probably push them to 9x5 of a Graupner eprop, but not APC or Gemfan. A 10in will likely push them way too far.

One of the best tools in your box is a "Watts-Up" meter. Make sure your specs are at or under that of the manuf rec's on your motors. Using a Watts-Up will also help you squeeze every inch of thrust out of your setup. If you guys don't have one, get one. Play with it and get familiar. You can easily determine if you are over-amping your motors, get better flight times, more thrust, etc.

http://www3.towerhobbies.com/cgi-bi...?&I=LXLMV0&P=FR
.

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09-28-2012 10:51 PM  5 years agoPost 34
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

My Posts: All  Forum  Topic

Thanks for the PM, I will work on all suggestions. I use an EagleTree data logger to measure current and voltage, should be the same as the 'WattsUp', except I can plot the usage logged during flight, plus altitude (not logged in the above plot)..

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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09-29-2012 03:15 AM  5 years agoPost 35
HansAuf

rrApprentice

Gainesville, Florida, USA

My Posts: All  Forum  Topic

Ah, yep. That will work too.

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10-03-2012 10:20 PM  5 years agoPost 36
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

My Posts: All  Forum  Topic

With my new Avrotor motors 12X3.8 props 6 min test. Motors barely warm now.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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10-04-2012 02:05 AM  5 years agoPost 37
bigwolf1

rrVeteran

USA

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Yep,

mine get barely warm at 7 + pounds 11x4.5 carbon props on the f550

MAH blade Rep
Trex700LE
Magnum fuels

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10-04-2012 03:37 AM  5 years agoPost 38
HansAuf

rrApprentice

Gainesville, Florida, USA

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+1 Love my Avrotos!

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10-04-2012 03:39 AM  5 years agoPost 39
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

My Posts: All  Forum  Topic

Hansuff,
In your multi rotor build thread you suggested some reflashed ESC units. What is the advantages of these units for multirotors ?

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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10-04-2012 03:54 AM  5 years agoPost 40
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

My Posts: All  Forum  Topic

Did some google research and found the answer, quicker throttle response which in turn may provide better stability.
Now I need to cut open my latest ESC to see if the are Atmel.
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EDIT: Well, they are not Atmel, mine are SIL, so I guess I'll not fool with them.
.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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