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Assembly: Aeroworks QB 150cc Yak 55M

He is probably honored! I had visions of cartwheels down the runway, but looks like it's OK. I was going to say that now it is dinged, you can relax and fly the snot out if it, but I have a feeling you already do!
 

Joe Hunt

150cc
He is probably honored! I had visions of cartwheels down the runway, but looks like it's OK. I was going to say that now it is dinged, you can relax and fly the snot out if it, but I have a feeling you already do!

Maybe I'd better be a bit more conservative for awhile. haha
 

Joe Hunt

150cc
Great build man! Would you mind doing a quick video on your aileron geometry? I'm trying to wrap my head around it. Lots of info in that post.

Okay, pretty poor quality video. haha Just threw a GoPro on my head and started talking. Points I was trying to make:

1) protractors help you get your servos as synchronized as possible
2) you still want good leverage, resolution, and linearity with that synchronization
3) if you think your (2nd person plural) method is great, maybe it is, maybe you're right, but check it with a protractor, you may find that you can refine it even still
4) having your control horn pivot point in the hinge line could mean less than ideal pushrod angles and somewhat limited throw for high rates.
5) what I meant to say about tailwheel geometry and ground handling, is that guys think they need to setup their geometry wrong to get good ground handling. But they don't, you can set it up correctly and have great ground handling too.

 
Last edited:

Joe Hunt

150cc
From another review where I'm talking about pushrod angles:

Here’s some notes on how I drilled my own pilot holes located differently than the factory pilot holes… and how I measure to come up with that location:

yak-qb_073.jpg

The combination of not being 90 and also being out of level has a lot of people looking at it weird and also telling you it’s wrong. lol:

yak-qb_074.jpg

But here are four reasons why it is not:

yak-qb_075.jpg yak-qb_076.jpg yak-qb_077.jpg yak-qb_078.jpg

It doesn’t take but a minute to drill pilot holes in new locations. And, Aeroworks gives you a generously sized hard point to keep this from being any kind of problem. I’ve seen, and replaced, some slack factory hard points in these 1/3 scale ARFs from other manufacturers, but never from Aeroworks, their hard points are solid:

yak-qb_079.jpg
 
Joe, great video. It is pretty much how I set up my multi servo surfaces. I may have missed it but when I set up my servos my end points in the radio are all exact. Say 120% for this discussion. I leave that end point there and do not adjust it. I will then use the turn buckle and change sub trim for "new center" till I get equal travel on full up and full down. Once I get that I zero sub trim and will use multiple different arms to try and get my sub trim as close to 0 as possible. I now use airwild unihubs to get that tuning even better. So now I will have my end points equal in the radio with slightly different subtrim values. By tuning for closer to 0 sub trim is usually good for a few extra degree's in surface deflection. I usually don't take the arm off but for checking for binding I will remove one of the surface control horn bolts and "eye up the hole" where the bolt should go to see if there is any change in balance. If there is then I will use the servo balance to fix it. With my JR brushless servos I found this to be the best because an amp meter does not work very well for checking binding.
 

mikeh

70cc twin V2
Thank you Joe! I use the protractor to set my predetermined center but never thought of using it to set my control Horn height. I just measured to center and got close. In a short version I was only getting half way there to perfect servo geometry. It all makes sense now.
 
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