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I've used the Graupner 8 x 5, 9 x 5, and 10 x 5 on mine and find the 9 inch to be the best all around at least on 3S packs. The 10 inch were a bit too wobbly, the 8's didn't have much pop to them although they may be much better on 4S. Still I'd say go with the 9 x 5 but you will have to drill...

With the F450 I was intially flying with the DJI props and a GoPro hard mounted to the centeplate extensions and had really bad jello effect. Swapping the DJI props for a set of Graupners was a night and day difference. You can take the time to carefully balance the props you have and it will...

I tried installing some on a quad when I was having problems with a Hoverfly Pro board flipping in flight. I didn't see any difference with them vs not having them and the flipping turned out to be a power problem with the HF Pro board. I'm sure there are instances where they do make a...

Same procedure to load the older versions as it is to load the new although if you jump too many revisions in either direction you may have some problems with MKtool. Terminal should still work fine and let you do the up/down grade regardless. Only thing you need to make sure of is the various...

I downgraded back to .82 which was very stable for me, still working well and nowhere near as problematic as .86 was/is. Wait a bit and .87 will be out, that may fix things, or not... Ken

You don't, make sure the IMU is level on the frame and do a compass calibration. That's all you can do with the WKM, it's not like the MK where you have to calibrate the accelerometers with frame perfectly level. Ken

In a perfect world the F/C would be parallel to the frame so it wouldn't matter which way you do it, the reality is that it doesn't always work out that way. I try to get the F/C as close to level in regards to the frame as possible, usually just shimming the standoffs a bit is all it takes and...

I'll save you some time, just use a small pair of cutting pliers to snip off the tab. Put them flush along the edge of the connector with the tab between the jaws and just squeeze, you can do all of them in a minute or two. Ken

Use Y cables between the ESCs and the flight controller, the motors will work as pairs but you can have the rotation opposite each other. Ken

Then you may want to have SidneyW stop telling the world you will be selling or using DJI technology... http://www.rcgroups.com/forums/showpost.php?p=20695810&postcount=9416 Ken

No, there is no access to the internal operations and data of the IMU. If you want to use GPS and/or flight data with aerial photos you will need a separate system on board that has telemetry capability like most of the OSD systems have. Ken

I regularly fly my F450 in temps down to around 20 degrees F (-5 C) and haven't had anything break. Then again I haven't crashed it in the cold and I use Graupner props which aren't likely to break in flight regardless of temperature. It has been my experience that the majority of made in China...

The Naza seems to have some issues with the Turnigy Plush ESCs, no idea why as they're made in the same factory as Hobbywing and the only real difference is the label and maybe some slight tweaks to the firmware. I have a Naza on my small APV quad that had previously been flying with a WKM...

The word is Photohigher will be selling a version of the DJI gimbal, that's as much as is known at the moment. Ken

The ESC response rate is how quickly it can take commands to change speed that come from the flight controller and turn it into an actual speed change at the motor. Multirotors are unique in that they have to be continually making quick adjustments to the speed of each motor to maintain level...

No, I have never seen one and it would be meaningless anyway. Most ESCs available today are capable of working with any input up to 400 Hz and a lot of manufacturers are making a big deal about their ESCs being "400 Hz refresh" which is mainly marketing BS. At least Maytech says this "Fast...

Is the VU plugged into X3 and LED port and everything powered up? If the Naza is seeing the VU on both the canbus connection (LED) and port X3 you should be able to turn on voltage monitoring with a fully charged battery connected. If not you may want to bring it to the attention of the dealer...

Good question, I rarely if ever fly in GPS mode, a hangover from my MK days I guess! Thing is it didn't matter the other day if I started from a stable hover or not. Less than 30 seconds after switching to GPS mode it would start to circle, small at first and getting ever bigger with each lap...

While I'm thinking of it, the quad I had the severe TB problems with on Saturday appears to have gotten over whatever was going on with it. Yesterday I removed the IMU and reinstalled it with some heavier duty double sided tape and for good measure used a tie wrap around its body as well. I...

Good luck with the AV130, should be a fairly easy fix! There's plenty of folks on here that are UK based and know the answer to your questions, I'm sure they'll be joining in once they see the thread. I hope you don't mind but I added UK to the beginning of the thread title so the right folks...