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04-03-2005 12:26 AM  13 years agoPost 21
jemo

rrNovice

SouthWest Florida

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It may not make much of a difference with our small helis, this comes from full scale. I remember it being discussed many years ago, but don't recall a lot about, I just do it.

James Wang is the guy who can tell you all about it.

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04-03-2005 12:37 AM  13 years agoPost 22
balbs

rrKey Veteran

Los Angeles, CA

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The Align manual is flakey (at least the version I have). The section where it shows the tail rotor assembly steps shows the ball link on the leading edge side of the tail rotor. However, pictures of the tail after that page show the ball link on the trailing edge of the tail rotor.

Balbs

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04-03-2005 01:13 AM  13 years agoPost 23
Jarod

rrVeteran

USA

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I dont want to be the one walking around with his pants inside out saying, whats everyone looking at? They still fit.

So I put things the way they are supposed to be. Afterall it was so much work. Maybe it will fly better. Ill let you know after the wind and rain stop long enough for me to get out to the field. Notice the screw through the tail case going through the boom. I have been using this trick since day one and it works great.

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04-03-2005 05:33 AM  13 years agoPost 24
TonyTypeS

rrElite Veteran

New Orleans, LA & El Monte, CA

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Are you using a gyro double sided tape? After my crash i couldn't get my tail to stop wagging even with the gryo set at 20%. Then i notice that the gyro tape was kinda slitted so i replaced it. Viola problem solved!! I was using the 401
It's worth a try.

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04-03-2005 08:01 AM  13 years agoPost 25
steed302

rrNovice

Wahiawa, Hawaii, USA

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The reason the tail blades should turn counter-clockwise is because of the increased effectivness of the up traveling blade going thru the downwash of the main rotor disk. When the blades turn the other way, the inboard blade will lose effective lift. In our small heli's it may not make a difference but I still want to give it the best chance possible.

Trex 450, Trex 600, Fury Extreme 91, Eco 8, Hawk Pro

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04-03-2005 08:10 AM  13 years agoPost 26
Jarod

rrVeteran

USA

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Now that sounds like a good explanation. Way beyond my scope of understanding at this point. But still sounds good.

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04-03-2005 08:53 AM  13 years agoPost 27
737Driver

rrNovice

Brisbane, QLD Australia

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Just an update, spent the whole afternoon setting up the tail more accurately.

From 65% - 40% the tail wags slightly only after a change in direction using the rudder. This wag only lasts a few oscillations and then steadies until the next change of direction..........

All in all a little better but still this annoys me, alot.

I dont think it is the gyro, as it held the Zap 400 perfectly. I dont really want to go and buy a GY401 or a JR 410 unless it is essential.

I have heard that Futaba gyro's dont like some servo's, I have a Hitec HS-50 for the tail, what else has the speed and torque for the tail?

Still hoping to find a definate solution.

Regards,

737Driver

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04-03-2005 09:18 AM  13 years agoPost 28
MrMel

rrProfessor

Gotland

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Good luck.

I got the same problem after a crash, I have tried everything, then I mean everything, still have 3-5 wags after using the rudder.
FF, FFF is OK, but is very annoying with the little wag after rudder input.

You can see in this post what I have changed/checked:
Maybe something there that can give you a new idea that works for your setup.
http://www.runryder.com/t169113p1/

- Fredrik

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04-03-2005 10:33 AM  13 years agoPost 29
Heliramos

rrNovice

south of the Caribbean

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My tail blades Have the "A"character printed on them and as the manual say "A"character faces outside.
So if looking at my tail blades at the front iám looking at the "A" character.

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04-03-2005 03:47 PM  13 years agoPost 30
TonyTypeS

rrElite Veteran

New Orleans, LA & El Monte, CA

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737
Does your 240 gyro have a delay knob? I have a 401 and the manual says that if you get tail wag after doing a piro than you should turn up the delay.

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04-03-2005 07:06 PM  13 years agoPost 31
flytech

rrVeteran

Sunland, CA

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737Driver, change the tail pitch slider with a new one. in fact, buy a couple and replace it until you get the best results. you'll see what i mean if you try it.

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04-05-2005 02:21 AM  13 years agoPost 32
tele3030

rrApprentice

Singapore

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I changed the tape on the gyro and all my problems went away ..gain from 18 now up to 65 and can still go higher..it was all the tape in my case !!

ps it is a 401

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04-07-2005 05:26 PM  13 years agoPost 33
d_wheel

rrVeteran

Deep in the heart of Texas.

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Mulch!
The microheli slider removed almost all of the slop in my tail rotor, but it still wags like crazy. Next step is to try a different gyro.

I noticed in a couple of videos that the T-rex's in them wag also. Looks like we may just have to learn to live with it.

Later;

D.W.

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04-08-2005 01:53 AM  13 years agoPost 34
737Driver

rrNovice

Brisbane, QLD Australia

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D_Wheel,

Sorry I didnt reply to this thread sooner. I have fixed my wag, in fact my gyro (Futaba GY240) can now go to about 85% gain before a very slight wag starts to appear!

I sat down and rebuilt the tail, more importantly I purchased a GWS Naro HF-BB servo for the tail replacing my Hitec HS-50!

The GWS Servo is great, that was the answer a dodgy HS-50 too much slop in the gears.

I didnt replace any tail pitch sliders, nothing, all the same as before. It was simply a servo issue!

See how you go.

Regards,

737Driver

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04-08-2005 03:02 AM  13 years agoPost 35
tanasit

rrApprentice

Philly

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reason why..
Looking from the back, if the tail rotor is on the right (Trex, Concept), the tail totor spins counter clockwise but if it's on the left (Eolo, Hornet), the tail rotor will spin clockwise. This is because one of the tail rotor blades at one particular moment while spining will be "closer" to the wash blasted from the main rotor, thus the leading edge of the tail blade should turn "into" the wash for more authority or better efficiency. At the same time the blade when farther away will spin "away" from the wash.
Yes, I used to have the tail blades in backward and the trailing edge became the leading edge but it flew fine. However, the turning wasn't that precise and tere was some vibration at higer head speed. For small helicopter at not so high head speed, you may not feel the differences. If you have a long main blade set on, you may feel it though.

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04-08-2005 10:32 PM  13 years agoPost 36
Jarod

rrVeteran

USA

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UPDATE:

I have had several chances to test out the new and proper tail arrangemnt. I had them backwards before. It flew but I was not happy witht the piroute rate. It deffinately made a big change in the tails authority. Piroute rate might have almost doubled in speed. The tail no longer kicks out during flips or extreme manuavers. Its made a big difference. Thank you to all who contributed there ideas and knowledge.

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