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02-19-2013 01:06 AM  5 years agoPost 1
lrrace

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Missouri jackson

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I have a 550E with Wookong H, just installed and it drifts left and somewhat back. I am a bit confused on how to trim it, I have been told not to use TX trims that it will confuse the Wookong and cause a crash, but on DJI`s website it says you can use TX trims in test flight but go into the assistant and re- center the sticks.I have also been told to do it with the rods. Does anyone have experience with exactly how best to do this?

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02-19-2013 02:09 PM  5 years agoPost 2
Chris Bergen

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cassopolis, MI USA

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Did or does the heli hover hands off with the Wookong H turned off?

The heli must be mechanically trimmed properly for the Autopilot to work properly.

Do you have the GPS unit on it, or is it the Wookong H lite?

Chris D. Bergen

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02-19-2013 05:25 PM  5 years agoPost 3
lrrace

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Missouri jackson

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Will need a calm day to try that in manual but I bet it will still drift. Linkage rods are set as per Align specs and swash is level in the assistant at 50% stick. I do question the servo settings though they seem off to me although I am fairly new to the sport so I may be wrong. S1 -32 current out -88 S2 -67 co -119 S3-1 co 72. The dealer I bought it from is offering very little help. I have had a couple of local experienced guys go through that with me, also. Yes it is the Wookong lite. Thanks for the response it is more than I am getting from the place of purchase.

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02-19-2013 07:05 PM  5 years agoPost 4
Chris Bergen

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I see.

Keep in mind that without GPS it WILL drift. There is no way that it can stay in one spot as all it's doing is leveling the helicopter. If there's any wind, it WILL travel with the wind.

Chris D. Bergen

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02-19-2013 07:56 PM  5 years agoPost 5
lrrace

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Missouri jackson

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Thanks Chris, I will try to get some calm wind and do a test and post results. This seems to be more than just a drift though, heading into the wind I was having to hold a resonable amount of right stick, that`s why I was wanting to use the best way to trim. If it does need trim which is the best way to do that with the Wookong?

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02-20-2013 12:21 PM  5 years agoPost 6
Smithprod

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Oklahoma

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I've always trimmed mechanically, works great. Like Chris said, without the GPS it's going to drift with the wind but it shouldn't pitch in a certain direction.

Brad

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02-20-2013 01:35 PM  5 years agoPost 7
Chris Bergen

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cassopolis, MI USA

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+1.

Mechanically trimmed is best, meaning adjust the pushrods on the heli vs the electronic trims in the radio.

Chris D. Bergen

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02-20-2013 04:25 PM  5 years agoPost 8
lrrace

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Missouri jackson

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Thank you that`s the way I will go. I know what you mean about the natural tendency to drift, but this is more than that, so I will use the rods.

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02-21-2013 09:09 AM  5 years agoPost 9
95nostalgia

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Drift
Here's a suggested list.

1.Balance. All directions. Slight nose heavy. Mark your aircraft for those balance points.
2.Using software, double check your XYZ measurements with your balance points marked in step 1.
3.Set up swash, linkage etc as manual sez but only as a starting point.
4.Spool up in manual mode. Set headpseed, blade tracking etc as you would normally.
5.Do all prelim. flights in manual mode only. If it drifts left, adjust linkage to compensate.
6.Only when the aircraft can hover as best as possible level and "hands free" (for a couple seconds), then go for other modes.

Note this. WK-H does not really support auto takeoff in any mode except Manual. In other words, use manual...go into about a mid stick hover...then switch to other modes. DJI said it does auto takeoffs. Not totally true.

Hope this helps. In the end I didn;t use it for much more than an FBL stabilizer. For that it worked VERY well.

God created only a few perfect heads...the rest he put hair on them.

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02-21-2013 01:22 PM  5 years agoPost 10
Chris Bergen

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Now THAT'S a good list of suggestions.

Chris D. Bergen

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02-21-2013 03:59 PM  5 years agoPost 11
R Hudson

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Denver, CO

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So, in other words, just treat it like a helicopter first. Then move on to "assisted" modes

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02-21-2013 05:41 PM  5 years agoPost 12
lrrace

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Missouri jackson

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Thanks 95 for taking the time to write those steps it is helpfull. I will go back through and check them all again especially the balance points. I have this on a 550E and my head speed was tached at 2460 @ 85% which seems kind of high to me, but I was told that the 550`s run a lot. My throttle curve was 85% @ 25% then flat to 100% (was going by the one shown in the manual) It seemed very sensitive off idle so I set it to 55% @ 25% 65 @ 50% 70 @ 75 and 75 @ 100 but haven`t been able to try it yet we have a storm and a foot of snow now. Blades are tracking nice and heli is smooth.

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02-21-2013 09:05 PM  5 years agoPost 13
95nostalgia

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Setup
The WK-H (and M) are much better controllers than their lesser versions. The internals are better But also having the IMU which does all the work separate allows you to separate it to be positioned closer to the main shaft where it vibrates less and away from the electricity bus which is all the main box is. Make sure your IMU is square with the frame and not rubbing the sides. It's not super sensitive to vibrations so just about any dbl sticky tape will do. The rest is as Hudson said. You have to set up the helicopter first and the WK-H will not have to work hard against/with it.

Now if you had a NAZA, there are known issues of drift especially in ATT Mode. They released a new version software that allows trimming the cyclics. But in either case, you gotta fly and mechganically trim well before you get much "assistance". Low hovers with running shoes on until it's trimmed.

God created only a few perfect heads...the rest he put hair on them.

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02-21-2013 10:47 PM  5 years agoPost 14
lrrace

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Missouri jackson

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I have the IMU mounted on top off the gear block with two layers of 3M tape and it is nice and square. I really don`t think the extra layer was needed with the internal damping, but a friend here said to try two. I have 3 Naza M`s two with GPS and one without and they fly great. I just mounted a Naza H with GPS on a 600 PRO, the program seemed pretty user friendly, I had a friend test fly it and switched it into GPS and it was very stable no surprizes,but more tests are needed. We have been working on the 550 Woo since. I need to download the latest 1.04 on the Naza H and go through setup again and possibly set the cyclic back to 5 degrees instead of 7 as per manual. I read were people are having better results with 5 on big heli`s, so I thought I might give it a try.Trying to get some indoor work done till we can get rid of this snow. Thanks for the advice.

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02-21-2013 10:59 PM  5 years agoPost 15
95nostalgia

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Controller
Good deal. NAZA has way too much swash movement so you have to tame it down to avoid over-reaction. But the drift is still there. I said ATT Mode...not GPS Mode. Don't be surprised if you get diff. results in Att Mode.

Lose the two layers of tape. I use 3M for everything. The rest you seem to have a good handle on and are doing the right things. Just trim the helio out mechanically first.

Good flying.

God created only a few perfect heads...the rest he put hair on them.

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02-21-2013 11:03 PM  5 years agoPost 16
95nostalgia

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Forgot
NAZA M and NAZA H are two diff. beasts. Not to be mentioned in the same sentence (even though I just did). Multirotor is much simplier than heli.
Just my 2 cents which is only worth a penny...

God created only a few perfect heads...the rest he put hair on them.

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02-21-2013 11:22 PM  5 years agoPost 17
lrrace

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Missouri jackson

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I will take a layer off. I did know you meant ATTI mode, I see where people are having trouble with that, just haven`t had enough flite time with it to experience that. Thanks, I am learning as I go with the help of others,but there`s a lot to learn.

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