Was just thinking

Bartman

Welcome to MultiRotorForums.com!!
If anyone is looking for a fully capable flight control system with excellent wind tolerance, very good GPS stability and return home reliability, fully adaptable motor mixing table for a wide variety of configurations, and flight characteristics that are world class with zero tuning you might want to consider....
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Mikrokopter!

There are a lot of them available second hand and the prices don't reflect what a good, stable, capable flight controller the FC 2.1 is. I'd also say the firmware is the most stable in our industry at the moment. There's a mod that improves the altitude hold and the GPS can hold steady, as in dead steady, in winds well above what a lot of other controllers can do (my personal record is 22 kts gusting to 30 kts/35 mph!). Not too long ago MK was the gold standard and what other controllers wanted to be when they grew up, it's going on three years now since the FC2.1 came out.

THe one big weakness with Mikrokopter is the infamous MK BL, or BrushLess controller. They're good to about 30 amps (up to 4S) and are pretty reliable if they don't pop and die the first time they get full battery power. When they do eventually die (usually without warning) it's usually spectacular with fire and smoke. Lesser failures without the fire/smoke leave a good chance your Hexa or Okto will keep flying just fine and come back to the ground unharmed, albeit with a dead motor. There are many examples of MK motor out performance on the internet.

There's a converter board that lets you use whatever cheap ESC's you'd like in place of the expensive MK BL's. Flght quality can suffer a bit although I've seen these heli's do better with more weight instead of less. There is a line of ESC"s coming out that will use the MK's native I2C motor control architecture providing both inexpensive motor control and better overall flying qualities than with the converter. I haven't tried these yet but the 30A/4S model is already available with a 6S version coming soon.

So why write all this? I"ve seen good used MK electronics in the classifieds area and people are almost giving them away! It costs about $1800 new to set up an Okto with the full FC and GPS/Navi boards plus the 8 motor controllers. If you can find the FC and Navi/GPS boards in great condition and at a great price, it's worth the effort to give it a try.

There's definitely a learning curve but you'll be rewarded with a very capable flight control system.

Just thought I'd throw that out there! Thanks for reading!
 
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JLO

Member
Hi Bart I have been a MK user for the past 2 years and its been quite a learning journey for me, its has not been easy to understand all of the options and parameters you can do to, I agree MK FC is great and has many features but the fact that MK has not come out with a Bl V3 for heaver loads it baffles me and to see others thrive like Herkules 1,2,3 Aerodom and single ESC from many companies, and MK nothing!, I don't understand, the BL 2.1 with the MK FC, Navi, and GPS all work very nice until you get close to the 13.5 pounds then you have to figure out power distribution, motors, Esc, I2C, etc and you loos some of the telemetry that the BL had, I read that there is some kind of efficiency lost to with the I2C, look at DJI they are moving at light speed and they are making a Chinese company more like an international company with new very cool products with friendly websites and friendly instructions, MK is still a German company with translations in to english, and french some say that some information is lost in translation, I like MK but in my current new build I am looking for a FC and frankly I am about to go DJi A2, I hope MK folks could come out and say what are their plans for the near future
 
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Mactadpole

Member
Hey Bart, Couldn't agree more. I don't fly as much as I would like but every time I do its just as easy as it was the time before with MK. It's always rock solid and does what I want. I just upgraded two of mine to the FC 2.2 and its excellent in alt/pos hold. I too am blown away at how cheap MK equipment is going for on the used market. It really is a very solid and quality system. I will add that if you use a Graupner TX/RX system the telemetry is just awesome, I love the selectable parameters for the audio feed.

If your wanting more advanced features for less cost then try a used MK system.

As I get deeper into some mapping projects I am looking more and more to APM/Pixhawk because they are so geared to that sort of work. Have you tried the APM yet? You can PM me if you don't want to muddle this thread.
 

Bartman

Welcome to MultiRotorForums.com!!
shawn,

from what i understand, the apm requires an internet connection and a heli-to-laptop link during waypoint flights. The MK flight control can be pre-progammed prior to the flight so the flight can be conducted without internet access or a link to the laptop. i'm doing a build right now for a user that will be in remote locations doing waypoint flights and it looks like we're going with MK.

I'm not familiar with Pixhawk, i'll have to look into it.

Bart
 

soler

Member
With APM you can cache the map tiles when you have an internet connection, Later in the field these will still be available providing you zoomed in to that level and location.

For setting waypoints and uploading these you do not need an internet connection. Only a link to the APM either by USB or MAVlink
 

Bartman

Welcome to MultiRotorForums.com!!
With APM you can cache the map tiles when you have an internet connection, Later in the field these will still be available providing you zoomed in to that level and location.

For setting waypoints and uploading these you do not need an internet connection. Only a link to the APM either by USB or MAVlink

the link to the laptop must be maintained during the flight though, no? MK doesn't require this as the flight plan is uploaded to the FC prior to the flight.
 

soler

Member
With APM once the flight plan is uploaded then it does not require the link unless you want to track the progress.

Once you initiate the auto mode from the transmitter or from the laptop it will carry out the mission.
 

Bartman

Welcome to MultiRotorForums.com!!
ok, thanks for posting that. that is different from what I've been told.

my original post stands regarding the availability of used MK systems and the overall utility they provide for the money. for the most part, the standard beginner mode has worked well enough for me out of the box across a variety of airframes with no tuning required, from dead calm conditions up to the 35 mph gusts I flew and recorded video in.

Bart
 

DennyR

Active Member
APM 2.6 has come of age and is as good as anything out there. Cheaper than most, and it is an educational experience that allows the user to learn what he needs to know whilst being fairly easy to set-up. In terms of autonomous features it has a lot of stuff that other boards only offer as expensive add ons. For the guy who wants plug and play then the SuperX is what you need.
 

Bartman

Welcome to MultiRotorForums.com!!
you guys are missing the point of this thread, it's not meant as a comparison guide for the many options. it's making the point that, for the money in the used market, the MK system provides the performance that the other systems are only now reaching. the used market has MK electronics underpriced because of the sentiment that the systems are outdated which is incorrect.

i've got an APM 2.5+ that has yet to make it onto a heli, maybe soon though.

Regarding the SuperX, we've got one on the way for a full review by our very own Kilby so expect that to be completed in a few weeks.

Bart
 

Hexacrafter

Manufacturer
I recently experienced the SuperX first hand..... I was impressed. Although XA has had many issues in the past, they have a really nice FC here with the SuperX. We are currently working with a author working on a HexaCrafter build article... it will have the SuperX. Flys smooth like Hoverfly... hold GPS position like WKM but without the unwanted "nervousness". We will report more after further review & testing, but our initial impressions are the XA has it right. I have to say honestly that I never thought you would here me say that. Also, Drew of XAircraftamerica is passionate & a real service oriented guy.... we will just have to see how time plays this one out.
Andrew
 

Mactadpole

Member

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Av8Chuck

Member
Bart, for me it's been less about the money and more about how complicated it is to setup. When I got into MR there was no way I was going to spend that much money on something I knew I was probably going to destroy. DJI was one of the first to lower the barrier of complexity and price to the point it became almost an impulse buy. Buy it and try it, ithere were plenty of beginner pilots ready to buy it when/if you came to the conclusion that you couldn't trust it.

Although I haven't tried them yet there are more reliable, less expensive, with improved performance, almost as many features and much easier to set up, so as much as I might agree with your OP I'll probably try a SuperX before buying a used MK.
 

Mactadpole

Member
There are still a bunch of features SuperX doesn't have that MK does. MK is the most reliable FC I have flown. Yes its a bit more complicated but I guess it all depends on what you want to do with it. There are many companies with nice flying FC's saying this and that feature are coming and here we are years later and they still haven't materialized. MK and a few others have it now.
 

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