Discussions

I've been getting a few PM's about this moongel stuff, figured I'd make a new thread about it since it's bound to get lost in the main AC 2.9 thread.

In any case, the solution to all my problems was Moon Gel.  It's available in just about all local music stores which was awesome for me convenience wise, didn't really want to wait for something to ship from ebay.  Another alternative is Wincent Tone Gel which SHOULD work just as well if the music store carries that instead.

Anyway, I threw together a quad from leftover parts I had laying around just so I can see what APM can do before I decided if I wanted to switch over to it on my hexa.  Basically an old, busted Xaircraft frame, pretty banged up motors that have seen plenty of direct pavement hits and some terrible props from years ago.  Needless to say, it was a vibration machine and 2.9.1 was absolutely terrible on it in alt hold/loiter due to massive vibrations.  I tried the rubber orings, and the earplugs first.  Earplugs worked decently but I still couldn't make it behave well at 20+.  Enter, Moon Gel.

Ended up stacking two pieces on each corner of my apm with super thin 3m sticky tape on top and bottom and my chopper started flying like a dream.  I had to use 5hz before and alt hold/loiter were completely unusable,  With earplugs I was able to get it behaving somewhat alright@10hz, but it still left a lot to be desired.  After the moongel it was perfectly stable at 20/42 and all my vibration issues went away.

I think I paid $6.40 for 4 pretty big pieces, I only ended up using maybe half of one strip.  It's super cheap, ebay also has plenty but the local convenience with the music store was awesome

After the initial tests I just took it all apart and glued the moongel to the apm, then glued that to the frame.  The double sided sticky tape worked fine in my brief testing, but I just wanted to make sure it wouldn't give.

Whichever way you decide to put it on just make sure you superglue the double stacks together in the middle, moongel on moongel direct is a terrible idea without superglue in the middle of it.

Even put some on my gopromount of my old knockoff dji f450 frame [vibe machine] and it worked wonders on the jello.

To be honest, I'm about to dump my WKM while it still has some value and get a PX4 or 2.5 for the heavy hexa, I'm THAT impressed with the alt hold/loiter/waypoints/performance/cost of Arducopter now that its flying my ghetto bird like a dream.  I'm sure 2.9.2 will be absolutely fantastic with more inertial nav, I just fear a lot of people will be fighting vibrations and giving up before getting a chance to really see what it can do.

Here's a picture of the stuff.  The square stack at the end is how much I used on each corner.  Double stacked, glued together in the middle.

As for the progression, here's some videos:

Earplugs@5hz [maybe 10, I can't remember], you can still see how badly it twitches while trying to maintain position.

Moongel, just about stock settings, only changed a couple of things:

Moongel after some more fine tuning@42hz, absolutely 0 discernable twitch.

mg.jpg