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Home✈️Aircraft🚁Helicoptere-Elec-Helicopters New or Limited ActivityE-Sky › Blade tracking verification
09-15-2009 09:12 PM  11 years ago
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Heli_KV

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Ottawa, Canada

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Blade tracking verification
Some time ago there was a topic about how to check for blade tracking safe. That time there was no answer of safe appoach.

Now there is: Use mirror. HBK is small enough to hold it in hands and watch in the mirror. For sure eye protection is good idea, just in case.
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09-15-2009 10:28 PM  11 years ago
Gregor99

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Western Wa

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That is better than hovering at eye level. But I've never been comfortable spinning up the rotor within 3 feet of my body.Revolectrix Beta Team
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09-15-2009 10:47 PM  11 years ago
Heli_KV

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Ottawa, Canada

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For sure it is not comfortable. But even less comportable to check tracking being inverted and trying to understand what blade is lower, hovering at eye level, looking at blades. Often tracking is nice in upright but bad in inverted. Then heli is back for fixes. Good that HBK is small, so it is easier to do.
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09-16-2009 05:13 AM  11 years ago
shizack

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Aiken, SC USA

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Tracking injury
before I got my sticking servo issue fixed, I was checking the tracking on my EXI 450 using the old "hold it in your left hand and spin 'er up" technique.

The servo twitched, and...

This was at a relatively low RPM and the bruise got even bigger over the next day or so. Hurt like heli.
A soul in tension is learning to fly
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09-16-2009 05:30 AM  11 years ago
Heli_KV

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Ok. Then mount heli on a stand and use MIRROR.
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09-16-2009 06:04 AM  11 years ago
Gregor99

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Western Wa

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That's rough Shiz. I think I'm going to stick with eye protection and very brief eye level checks. As long as the heli can live with slightly imperfect blade tracking, so can I.Revolectrix Beta Team
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09-16-2009 01:40 PM  11 years ago
Heli_KV

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Ottawa, Canada

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Not sure what it means slightly inperfect tracking. When I built G5 and had issues with ground interaction and head shaked on spoool up and down, when I said, that I have about 5mm of tracking difference on 350 blades at tips, I was told that this is huge and was advised to fix it. After several iterations with my issue, including fix of that blade tracking, problem was reduced quite a much.

So, since that time, I try to keep tracking as perfect as possible, extremely on small machines: 450 and smaller.

Over time, I started to feel, that it makes difference in flying characteristics. Perfectly tracking blades have even different sound if to listen indoors. It is possible to say, that blades do not track, but impossible to say what blade is higher. Maybe I have super ears...

Same with tail blades - if they do not track - welcome to vibs.

What eye protection of commercial use will save from throwed and flying blade? Maybe I do not know about good stuff?

Just my experience, that heli should be tuned perfectly. Now, I wonder that people who start to fly helis trying to stick with not quality stuff, not setting up heli carefully, etc, saying that it is learning heli, I want to learn first and then to have quality heli. Well, how to learn on non quality or on non properly setup machine?
Hmm, I was the same originally. I now have opposite oppinion. Heli extremely small one and extremely one of the first machines should be as perfect as possible to ease learning curve. Then you can fly whatever, but you will not want to to deal with inperfect machine.

Just an oppinion. Any comments?
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09-16-2009 01:50 PM  11 years ago
Heli_KV

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Ottawa, Canada

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And btw, due to circumstances, I deal with 4#3 in various combinations and settings and setup. The same - if a bit inproperly setup - it flyies considerably worse, then when it is as perfect as possible, taking it's small size limitations. Now it hovers really hands free for 5 sec and do not have tendency to fly away. Similar to coax. Unfortunately due it's tiny size this does not last long - motors wear, some constructive deviations, etc. But it is quite stable and predictable. I even started to think to add Bell-Hiller to it to increase it's responce. Strangely expensive though for the parts required: $28US for two tiny plastic parts and two pushrods and couple of bushings and screws.
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09-16-2009 04:29 PM  11 years ago
Gregor99

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Western Wa

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Not sure what it means slightly inperfect tracking.
If I can see a gap between the blades, I'll set the tracking.
What eye protection of commercial use will save from throwed and flying blade?
You are right.
Revolectrix Beta Team
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09-16-2009 06:52 PM  11 years ago
Melnic

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Columbia, MD,USA

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Tracking can be off even though you don't see a gap, but I don't get that picky. On average, after setting up the helicopter, I only need 1 turn.

Hmmmm, are there not things that are more dangerous to worry about and deal with than setting the tracking? I don't really think hovering and checking your tracking is that dangerous. The distance you SHOULD be away from you and the time it SHOULD take you is a pretty big factor in a diminshed odds of occurance.

Wait, newbies need to suffer through ALL the things we did. Maybe even more. That is only fair!
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