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HomeAircraftHelicopterThunder TigerOther › Titanium 50 Collective Push-Pull on R60-90?
02-10-2006 04:20 AM  12 years agoPost 1
ESWLFSE

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Liberty Hill, TX

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I saw a pic of this and it looks like a nice use for that empty servo mounting location. Is there any noticeable benefit to these push-pull setups? Would it work on a 60-90?

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02-10-2006 06:20 AM  12 years agoPost 2
Wesley-G

rrApprentice

Elmont NY

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Yes it should fine on a 60-90 is it a noticeable benefit when I see it Alan Szabo or Marcus Kim machine then I will think a may be a benefit to flying.

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02-10-2006 11:38 AM  12 years agoPost 3
Motions

rrVeteran

Tallahassee, FL

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If you pull an extreme amount of torque like Alan Szabo does then it is beneficial. Other than that, it's a waste of a servo.

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02-10-2006 02:20 PM  12 years agoPost 4
rob10000

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Western Massachusettes

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Other than that, it's a waste of a servo.
how is using the push pull linkage a waste of a servo?

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02-10-2006 06:34 PM  12 years agoPost 5
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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He hasn't seen the pics and thinks it's a two-servo setup.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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02-10-2006 06:52 PM  12 years agoPost 6
Ben-T-Spindle

rrProfessor

Central Illinois

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Just wait for the Titanium 90 that should be out later this year.


.

... BTS

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02-10-2006 07:58 PM  12 years agoPost 7
Motions

rrVeteran

Tallahassee, FL

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Is that my bad??? The photo I saw had two servos connected together by two links. Did I see the wrong photo?

Am I that stupid?

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02-10-2006 10:41 PM  12 years agoPost 8
Professorwiz

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Livonia, Michigan - USA

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Hmm, I've never seen a 2 servo setup. I'd be interested in seeing that.
Russ

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02-10-2006 11:31 PM  12 years agoPost 9
rob10000

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Western Massachusettes

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Awesome, some people have installed another servo when boom mounting the rudder leaves a void up front.This is connected to the pitch arm on the opposite side, so you get dual servos moving the pitch arm.

Motions, here's a picture of the linkage.

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02-11-2006 01:05 AM  12 years agoPost 10
Motions

rrVeteran

Tallahassee, FL

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I can't for the life of me find that pic anywhere. Rob, the one I saw looked just like that with servos installed. I'm guessing it was the Titanium I saw but can't remember where.

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02-11-2006 01:25 AM  12 years agoPost 11
rob10000

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Western Massachusettes

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This one?

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02-11-2006 02:19 AM  12 years agoPost 12
ESWLFSE

rrElite Veteran

Liberty Hill, TX

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Looks so right and good I gotta have it. Collective being the highest servo load in the machine you'd think that would be the first place you want to add push-pull.

Is there a Titanium manual online somewhere? Is this all available under one part number? Anyone ordered it yet and know how much?

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02-11-2006 02:22 AM  12 years agoPost 13
Professorwiz

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Livonia, Michigan - USA

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I would be very interested to know if this does indeed help out. I was thinking of making a couple with bearings in them for mine, but don't think they'll have much of an impact. I guess it could act as a type of torque multiplier and ease the load on the servo slightly.
Russ

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02-11-2006 02:23 AM  12 years agoPost 14
Motions

rrVeteran

Tallahassee, FL

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YEAH, that's the one.

But now that I look at it, the servo on top doesn't look like a servo. Just looks like a servo arm. I'm guessing that would improve the torque that way.

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02-11-2006 02:53 AM  12 years agoPost 15
pH7

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Sterling Heights, MI - USA

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In another thread here, there was a huge debate about whether or not you gain torque. I know from my college Physics classes that there is no new torque magaically generated. If you believe there is, I also have a perpetual motion machine that I am willing to sell you.

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02-11-2006 03:17 AM  12 years agoPost 16
Motions

rrVeteran

Tallahassee, FL

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Well, maybe not MORE torque but it seems more evenly distributed and... hell, I don't know. There has to be a reason they did it.

And I built one of those perpetual machines in high school and I never could get it to work.

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02-11-2006 03:19 AM  12 years agoPost 17
Professorwiz

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Livonia, Michigan - USA

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It would be the same principle as using a longer bar on a stuck bolt. Longer bar, more torque on the bolt, shorter bar same pulling strength less torque. It is a simple lever device, as my wife is a college grad teaching science I'm sure you can appriciate that while torque is not magically created it is a measurement of force and rpm, or speed, and by using levers it the torque on a particular object can be amplified.

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02-11-2006 03:26 AM  12 years agoPost 18
ESWLFSE

rrElite Veteran

Liberty Hill, TX

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There is no torque multiplication at all. The location of the output link on the intermediate applies exactly the same amount of force it would in that same position on the servo arm.

The benefit is that the load on the output shaft of the servo is equalized extending servo life and performance.

A good analogy would be a 4-way lug wrench on a car wheel lug vs. a standard lug wrench. With the 4-way you can apply both a push and a pull force and the wrench will not twist and fall off the lug. With a standard lug wrench the force is not equal and there is a tendency for the wrench to come off the lug.

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02-11-2006 03:29 AM  12 years agoPost 19
Professorwiz

rrVeteran

Livonia, Michigan - USA

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But... on a 4 way the lug nut is centered between the force, as the bearing is. The rod connection is off to the side creating a lever effect.
Russ

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02-11-2006 03:40 AM  12 years agoPost 20
ESWLFSE

rrElite Veteran

Liberty Hill, TX

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Correct but it is applied to the intermediate arm and not the servo.

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