I have just bought the ArduPilot Mega 2560 Full Kit... plus the Triple Axis Magnetometer HMC5883L. I should have it built over the weekend.. then i'm off to a my mates machine shop, and i'll make the splitter plate for the lower frame onto which i am going to fit the Ardupilot. the magnetometer i'll put on the tail as suggested. I am going to use my X-cell Razor 600E. For those that dont know its around the 50 size nitro heli.
Do i need to buy any other sensors i.e. the Sonar... i can fly a helicopter all day long but this is my first time flying one with stabilisation so any tips would be gratefully appreciated.
If this works well then i am going to try and use it on my x-cell gasser. i can get up to 20 minute flights with this. But i think for the time being a battery 600 is the way to go.
i'll post some pictures when i have it all together.
It's a DJI NAZA. Since it came out about a month ago, I just had to try it. :)
Well, 600 AND flybarred, both are the best ingredients to get a stable machine. On the other hand 3DR quad is more like a 450 size AND a flybarless. So, comparing to a 450 flybarless is more fair. :)
I've tried quite a few different 450 helis with different controllers, and I've never ever flown a multicopter before. When I maiden my mutlicopter last month, to my surprise, I was shocked that how easy it was to lift off, hover, fly around, and land. If I have to rate the flying difficulty, I would say it flies more like a shopping mall grade co-ax heli. That's how easy it is.
Oh the descending wobbles, I've read that that is one of the weak point of multicopters. I think the reason is because the physical dimension of it is like a piece of sheet laying flat. I can totally see that being hard to not wobble while descending.
However, mine is set up like an AP machine with long flight time. It has a tall landing skid with camera mount, and also 2 heavy batteries on top of the body. It weight 3-4kg depends on what I'm carrying and what battery I have on it. It descends very smoothly.
Is that the Hobby Kind hexa frame?
Oh yeah, you traitor! ;)
I'm been thinking about giving up on helis for Aerial Photography. An octo is mechanically so much simpler, and I thought had redundancy. But I've recently heard people saying that, with an Octo, if it is carrying a heavy load, it'll probably come down anyway if one of the motors fail.
So now I'm not sure anymore.
LOL. Yea, I know. I love heli too, but the multi is just so simple to fly and so simple to fix. I STILL have not repair my heli from the last APM2 yaw related crash.
Yes, it is the HK Hexa. The main body is very small.
I have to buy bunch of different carbon plates and adding decks to it to have more space to mount different things.
OH, to get back on topic, I'm planning to move my heli's APM2 and/or the daughter board away to get a better baro reading. The sonar is still unreliable. When it works, it works great. At times, it just doesn't have any reliable reading and cause it to crash.
I think an octa should be able to keep flying with a motor out. Not sure about a hexa..I've heard it can't survive with one motor out so I've been meaning to try and see why and then try and sort it out...many other things to do though..
The flight controller will use all related motors to achieve whatever it needs to do. Since most motors are already at 60-80% capacity while hovering, when one motor is out, it just won't have enough power to keep it hover, even using nearby motors to compensate.
On an octa, most likely you'll be carrying something heavy so the same situation apply. You still won't have enough power compensate from the other motors.
Ah, but you should be able to reduce power on the opposing motors. You might come down (perhaps fast) but you shouldn't have to flip over I think.
Unfortunately, with many high end cameras, even a hard landing will mean disaster.
Nav works for me, last weekend, i was testing at the field (first flight of the day) did the usual start up, hit alt hold, then went for Loiter, The heli did a nice slow 45 degree turn and started heading off down field, it was flying pretty well. After another couple of tries i brought it back, landed and found that the Loiter setting was actually Auto and it was trying to head back to where i live. I had set the home point 10 miles away.
So i dont think that would be a problem. :)
Jason's added head-wind compensation into the latest code which will hopefully go out as 2.6.1 in the next week or so. This will improve the way point navigation even more I believe.
I have spoken to martin @ byod, he has the latest Ublox gps coming in today, i'm going to pop down tomorrow get one, do i need to do anything special to get it working with the code?
Theoretically it should just work when you plug it in. There was a bunch of code that Tridge put in to automatically configure it. I think that went into 2.6 although we subsequently found there were some differences between the version he had and the version that's actually shipped...
I guess we will find out soon when people start receiving them and if they can't get a lock we know we need to do a release asap!