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Old Feb 07, 2013, 09:38 AM
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Old Feb 07, 2013, 10:34 AM
Cranky old fart
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Old Feb 07, 2013, 11:07 AM
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Old Feb 07, 2013, 11:14 AM
Ain't crashing often anymore
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Germany, Berlin
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Quote:
Originally Posted by Steve_ View Post
I've burned up so much time on the 9116, it should be
perfect by now, but changing one thing just makes other
issues more apparent.

I might just buy all new head parts and leave it stock until
someone that knows what they are doing can figure out
some good modifications for it.
LOL - was there August '12
http://www.rcgroups.com/forums/showp...postcount=3133

-mike-
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Old Feb 07, 2013, 11:19 AM
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Failed experiment

I was hoping to have a good mod to report on to you guys, but no luck.

Using the stock parts I made a 90 degree flybar head. I was able to hover it OK but actual flying didn't work. It was way to unstable and much harder to fly than my 6 ch. After my third or fourth crash, the last of which took out my modded inner shaft and a canopy post I called it quits.

I think the main problem was a lack of head speed and resultant stabilization. I also was using 15 grain flybar weights. It might have worked better with stock weights, but I don't want to add any additional weight to the heli. There might be more to it not working, but not having a doctorate in head physics like Bair14, I don't know.
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Old Feb 07, 2013, 11:22 AM
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Old Feb 07, 2013, 11:30 AM
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Quote:
Originally Posted by Steve_ View Post
I think reducing the weights is removing too much gyroscopic
effect on the 9116. Sure, it flies better inside, but outside it's
a nightmare.

The head speed is already super low compared to CP's,
and the 5-6 gram blades are just too light. Actually, since mine
are trimmed, I think they are around 4 grams.

Without enough gyroscopic effect, any wind at all makes it
super hard to control.

What about taking the weight we remove from the balance bars,
and somehow adding it to the tips of the blades?
I tried that a few weeks ago. I drilled a hole at the end of the blades and put a screw and nut though it. All it did as far as I could tell was to slow down cyclic response and make it act more like a stock heli. And yes, it was definitely more stable.

You probably already know this, but making it nose heavy helps a lot in the wind. The downside is that you can't hover without giving it some rear cyclic, but I don't do much hovering anyway.
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Old Feb 07, 2013, 11:35 AM
San Mateo, CA
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United States, CA, Foster City
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Quote:
Originally Posted by Steve_ View Post
+1 Mike.

While the 9116 is a decent first 4ch helicopter, that is all it
will ever be. There is really nothing that can be done, short
of replacing every part, to make it fly like we want them to.

I need to stop polishing turds.

I would have come to this conclusion much sooner if I had
a decent place to fly. It's too cold outside, and inside there is
no room to test fast forward flight.

That is really what it boils down to. I have never been able to
fly in continuous fast forward flight. No matter what I mod,
the pendulum effect eventually kicks in.

If I could get it to fly like the F645, I would be happy.

And the F645 does not even fly that well but at least I can
get continuous forward flight.
Yep, I think that's the right attitude. After a while you have to admit, you can not make a silk purse out of a sow's ear but it's a hell of a nice hobby to try and prove everybody wrong. I am thinking the 9116 size heli is quite acceptable for some indoor hovering and some outdoor light wind escapades. So what would be a natural progression if one would want to stay with the 4 CH or perhaps 6 channel that can be totally dumb-ed down to fly like a 4 CH and have a reasonable budget and a heli that can be serviced and repaired/ maintained by a not-so-technical-handy- person . Thinking that an on-board diagnostic tool (telemetrically downloaded to the TX of course) would be AWESOME.
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Old Feb 07, 2013, 11:40 AM
Cranky old fart
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Old Feb 07, 2013, 12:07 PM
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Don't give up

Quote:
Originally Posted by Steve_ View Post
It was meant to be a compliment Balr14, but is see now
the possible double meaning. Too funny.

I've burned up so much time on the 9116, it should be
perfect by now, but changing one thing just makes other
issues more apparent.

I might just buy all new head parts and leave it stock until
someone that knows what they are doing can figure out
some good modifications for it.

You've come up with a lot of great ideas and mods and you have to admit that it's been fun and a brain teaser. Don't give up now. The 9116 will never be as refined as we would like, but it's still a blast.

Like me, you've probably forgotten just how much of a slug (by design) a stock 9116 is. When I returned my second one to stock for my brother to fly I had a rude reminder of why I started modding it in the first place.

On another note: I modified my mixing arms and tightened them up with bushings and they are a big improvement. I can't understand why you're having problems with yours unless they are binding the linkage a little.

Anyway, hang in there. Maybe you just need to put it aside for awhile and regroup.
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Old Feb 07, 2013, 12:11 PM
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Old Feb 07, 2013, 12:35 PM
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United States, FL, New Port Richey
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Gygax, thanks. I had seen some posts about it, but could not find them. Have two on order. Half the fun of flying this helicopter is the upgrades. Mine was doing great until the servo died.Thanks to everyone for their input on this thread.
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Old Feb 07, 2013, 12:48 PM
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Old Feb 07, 2013, 12:57 PM
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Old Feb 07, 2013, 01:06 PM
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