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Re: [Paparazzi-devel] Multicopter new flight record 129min 37sec

From: Sergey Krukowski
Subject: Re: [Paparazzi-devel] Multicopter new flight record 129min 37sec
Date: Wed, 24 Dec 2014 23:04:07 +0100
User-agent: Opera Mail/11.61 (Win32)

Recently made a test payload flight. Used a 1,6 kilo brick as a payload. Approximate max flight time a bit more than an hour.

Next year will make some long range tests in NAV mode.

Merry Christmas, guys!

It can definitely be true, respecting the overall propeller circle area. I will definitely test it as well.

Best regards,

Hi Sergey,

Maybe you could gain some flight time by flying at slow speeds in nav mode.
The power required to fly at low speed is sometime lower than in hover.
Just my two cents...


2014-11-19 9:42 GMT+01:00 Sergey Krukowski <address@hidden>:

Hi Michal!

The initial idea was to not using the GPS module to save extra couple of grams weight. For the second flight however I used a small GPS module from HK, but the receive wasn't good enough, so I didn't try to switch to hover mode. I'm currently preparing some new tests with autonomous flights, will
keep informing.
Btw, here is the video of the second flight:

Best regards,

 Hi Sergey,

congratulations, that is a pretty long flight! I have a question - I
noticed in your log that you were flying in manual mode (good job keeping
fingers on sticks for over two hours) - have you tried also autonomous
flight for such a long time? I am curious about the performance of


On Sun, Nov 2, 2014 at 9:18 AM, Sergey Krukowski <address@hidden> wrote:

Well, that's pity... I read that LiIons aint give their capacity if load
is close to 2C. But in my setup the average current is about 10A, so for
cells it's significantly less than even 0.5C load. That is where my
suspicion about inaccurate current measurements came from. But according
earlier investigations with precise amperemeter my current data should be
pretty good.
So, probably the cells are really not good enough.

Best regards,

 Hi Sergey.

Now that is along flight time for a rotorcraft!
I don't think that your sensor is wrong, i have yet to find a battery
delivers its
stated capacity.
Every cell i have tried usually fall short of its advertised capacity by

On Sun, Nov 2, 2014 at 5:39 PM, Sergey Krukowski <address@hidden>

 Hi guys!

Well, I finally done the new flight time record with my octo frame
normal outdoor conditions.
The result is 129min 37sec. Well, it's not really way too longer, than Ferdinands record, but the flight conditions wasn't very good today.
Partially was pretty windy.
The wind once even dropped my timer down from the logging installation
Looks like the NCR18650B cells in my battery are a bit old. Not sure if
current sensor is 100% precise, but despite of the theoretical capacity
23800mAh, or, according the seller:
the minimum capacity 3250mAh x 7 = 22750mAh, it gave me only 20230mAh.

The attached logs are in rar file.
I'll upload the flight video on my youtube soon.

Best regards,
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