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HelicopterFlybarless Rotor Head SystemsOther › Setting up true zero degrees pitch
06-18-2014 02:05 PM  3 years agoPost 41
turboomni

rrProfessor

East of the Equator

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I use a swashplate leveler first to get close then check it from there with the soko . But with todays flybarless systems you can get away with some poorly setup helis and the fbl unit will take care of alot of the imperfections in the setup and it will fly good enough for some. I understand the other methods and realise they work well too. I personally like the Soko so I thought I would mention this as another way of doing things.

Setup is everything, All my heli's can fly far better than I can pilot them

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06-18-2014 02:18 PM  3 years agoPost 42
ssmith512

rrKey Veteran

Indianapolis, IN USA

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Thanks everyone for the feedback. I have certainly learned some new ideas on how to adjust my zero pitch. Sometimes what I find most difficult in the whole setup process is setting up the servo horns to 90 degrees and levelling the swash. For example right now I am setting up my Vario scale multi blade and there is no swash levelling tool for it. You have to rely on your eyesight to set these up which could lead to an inacurate setup.
Use the "Zip tie" method. Dont laugh, it works, works on ANY helicopter and cost all of nothing as you probably already have everything you need. I have used this method for years. It is quick, easy and fool proof.

One video of many...

Watch at YouTube

Steve

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06-18-2014 02:20 PM  3 years agoPost 43
rcflyerheli

rrKey Veteran

Granbury, TX USA

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I use a swashplate leveler first to get close then check it from there with the soko . But with todays flybarless systems you can get away with some poorly setup helis and the fbl unit will take care of alot of the imperfections in the setup and it will fly good enough for some. I understand the other methods and realise they work well too. I personally like the Soko so I thought I would mention this as another way of doing things.
I hope you haven't thought that I was putting down the Soko. I'm not at all. I agree with you there are different ways that we can set up the heads, and whatever works and you are comfortable with is the best one.

Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
Amain Team Rep

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06-18-2014 02:49 PM  3 years agoPost 44
turboomni

rrProfessor

East of the Equator

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Not at all rcflyerheli. It is interesting to hear and see all the different methods people use or have invented that work well!
This is an interesting topic.

Setup is everything, All my heli's can fly far better than I can pilot them

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06-18-2014 03:25 PM  3 years agoPost 45
turboomni

rrProfessor

East of the Equator

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Use the "Zip tie" method. Dont laugh, it works, works on ANY helicopter and cost all of nothing as you probably already have everything you need. I have used this method for years. It is quick, easy and fool proof.
great idea!! It is interesting to see the many different ways people tackle the same problems, with success!!!

Setup is everything, All my heli's can fly far better than I can pilot them

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06-18-2014 06:51 PM  3 years agoPost 46
philipev

rrNovice

New Richmond, IN USA

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WOW, I guess I flamed the fire under this old thread. Some really good ideas coming out. I've watched the Soko videos and it is a nice tool, versatile, good for any size heli, and only have to remove the blades. Any technique needs a good reference to measure back to, ultimately the main shaft. With no flybar anymore more of a challenge to use the standard "eye ball" pitch gage, that's why the rod in the blade grip aligned to the main shaft works so good. Good for zero pitch but not so much for collective and cyclic, then comes the digital gage. Still needs a reference to zero on, if the zero pitch is set, then zero the gage and measure the change of pitch ( heli doesn't have to be true to the world because you are still referencing back to main shaft). Still working on my Blade400 conversion to FBL, playing with the links and arms to get the best servo resolution, so I'm getting plenty of opportunity to fine tune my technique without a pitch gage. If it proves successful, blades track, heli flies and lands in one piece, I can share some pics. Basically reference wire on main shaft to level swash and swing blades to reference to each other, aligned for zero and measure separation/movement for degrees of collective and cyclic pitch. RPM phase sensor due on Friday so maybe a maiden this weekend.

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06-23-2014 04:04 AM  3 years agoPost 47
turboomni

rrProfessor

East of the Equator

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I want to hear more ideas,,,,BUMP!!!

Setup is everything, All my heli's can fly far better than I can pilot them

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06-23-2014 04:25 PM  3 years agoPost 48
rexxigpilot

rrProfessor

Florida

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The human eye is very precise at determining something that is or isn't square and/or parallel. Many can detect as little as a quarter degree, 15', off of square. Most leveling devices are no more accurate.

Richardmid1 explained the folded blade method, which is one of the simplest and most reliable methods used for years. However, he was shut down and told that this method doesn't get you 0° pitch. It certainly does if you know what you're doing. All you have to do is make sure all links are adjusted so they are square at mid stick. Next adjust one blade grip link so that the centerline of the blade chord and the main mast are square. Eyeballing is perfectly fine to do this (or use a screw driver through the blade grip bolt hole and align it with the main mast). Next, fold the main blades and make the other blade tip meet the previously adjusted square blade by adjusting the link length. You're done. This has worked for years and is the simplest way to get your heli correct enough where it can be flown and minimally adjusted as needed.

I have setup dozens of helicopters this way. Only perhaps two or three needed any adjustment after initial spool-up.

The other thing you may learn by using the folded blade method is trigonometry, as in the sine of the angle times the hypotenuse equals opposite leg length in a right triangle, (H)sine(angle) = length. You can use this equation to accurately determine your maximum pitch by measuring the distance between blade tips at full stick, dividing by twice the blade length and taking the arcsine. The result will be far more precise than using a gage.

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06-23-2014 05:59 PM  3 years agoPost 49
philipev

rrNovice

New Richmond, IN USA

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Did the maiden on the Blade400 FBL conversion on Sunday. Worked well needed about 1 1/2 turns to get the tracking on. I used the wire reference to level swash and swing blades to set zero, collective and cyclic. I set the heli tail down resting on the rear of skids and tail fin supported so main shaft is close to horizontal. This lets the blades hang down with no pressure on the linkages. Setting the cyclic and collective is pretty accurate, 325 blades .1 degrees equals .56mm movement. I need to recheck everything to see what effect the 1 1/2 turns for tracking had on my settings. Want to refine my technique to get better initial results (tracking right on). I like the idea of no fancy tools, wire or wire ties and a ruler also nothing has to be removed to check/make adjustments.

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HelicopterFlybarless Rotor Head SystemsOther › Setting up true zero degrees pitch
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