450 Tail Bobbing A Bit...?
- Thread starter Rob Lancaster
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Rob Lancaster
Well-Known Member
Howdy murankar, Tony and I have pretty much solved the mystery of the bobbing tail. I found a bent feathering shaft. All though I never actually flown it yet, I know that's what was causing the bobbing. Because I have an HK head there's slop all over the place so I wanted to upgrade to an Align head.
Tony, you pretty much read my mind. After thinking about it, your right, find the SE V2 parts or replace and upgrade the entire chopper.
Here's what really concerns me about SE V2 head...
Have a look at the photo below.
The screw that goes through the top of the radius arm NEVER stays in there. As a result I replaced it with a piece of a paper clip. There's play there to but at least it won't come apart in flight, like it almost did once.
Can a nut and bolt and lock tite, be used to correct this weakness?
If anyone knows where I might find the SE V2 head parts, just shoot me the links, thanks...
Ok, time to go shopping...………….
Tony, you pretty much read my mind. After thinking about it, your right, find the SE V2 parts or replace and upgrade the entire chopper.
Here's what really concerns me about SE V2 head...
Have a look at the photo below.
The screw that goes through the top of the radius arm NEVER stays in there. As a result I replaced it with a piece of a paper clip. There's play there to but at least it won't come apart in flight, like it almost did once.
Can a nut and bolt and lock tite, be used to correct this weakness?
If anyone knows where I might find the SE V2 head parts, just shoot me the links, thanks...
Ok, time to go shopping...………….
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Rob Lancaster
Well-Known Member
Ok, I figure I know what a flybar is.
I know what flybarless is,, as in the (Trex 450 Pro V2) right?
So what's DFC????
I know what flybarless is,, as in the (Trex 450 Pro V2) right?
So what's DFC????
Tony
Staff member
If you have a paper clip in that radius arm, then there is one of the severe issues causing the bobbing or wobbling. That should be pretty solid to the mixing arm (or is that the washout? It's early, can't remember...).
Flybar head will obviously have a flybar with mixing and washout arms. Very complicated looking but not that bad once you figure out what everything does.
A Flybarless head has no flybar rod, but still has the radius arms now known as "Swash Drivers" and has thin linkages connecting the swash directly to the blade grips. This is by far the most popular design and SAB is using this design on their new helicopters.
DFC is a term coined by Align and it stands for Direct Flight Control. However if you ask some of the purists out there, they will say it stands for Direct From Compass since Compass actually came up with the DFC design first. With this design, the radius or swash driver arms are no longer there and the linkages that connect the swash to the blade grips is now beefier and IS the swash driver. These heads have more precision than the FBL head above, but in a crash, they will transfer 100% of the torque from the crash directly into the servos. Unlike the head above that has thin linkages that can bend or break, the large arms on the DFC head are much stronger.
Hope that helps clear up some confusion on the different head designs.
Flybar head will obviously have a flybar with mixing and washout arms. Very complicated looking but not that bad once you figure out what everything does.
A Flybarless head has no flybar rod, but still has the radius arms now known as "Swash Drivers" and has thin linkages connecting the swash directly to the blade grips. This is by far the most popular design and SAB is using this design on their new helicopters.
DFC is a term coined by Align and it stands for Direct Flight Control. However if you ask some of the purists out there, they will say it stands for Direct From Compass since Compass actually came up with the DFC design first. With this design, the radius or swash driver arms are no longer there and the linkages that connect the swash to the blade grips is now beefier and IS the swash driver. These heads have more precision than the FBL head above, but in a crash, they will transfer 100% of the torque from the crash directly into the servos. Unlike the head above that has thin linkages that can bend or break, the large arms on the DFC head are much stronger.
Hope that helps clear up some confusion on the different head designs.
Tony
Staff member
I'm pretty sure this is the part you need to replace the paperclip...
Align Parts Bag (New) - Trex450 Upgrade
Align Parts Bag (New) - Trex450 Upgrade
Tony
Staff member
I am pretty sure you can find every part you need on this site. Including a full set of linkage rods, the solid type. Is it going to be expensive to build an entire head, yup. But if you want a stable helicopter, I think this is pretty much the only way to do it.
T-REX 450 Sport / V2 Parts
T-REX 450 Sport / V2 Parts
Rob Lancaster
Well-Known Member
Oh man that sums it up great on the different heads! I finally know what that means now.
Yeah I saw that site and some other ones in my search. Oh yes: ching!! ching!! Folks...
What would you say if I told you I found a new Trex 450 Pro kit. It comes with a good ESC and motor for $217.00 delivered... I figure I could use my Spartan gyro, 3 HiTec HS-65MG cyclic servos, 1 Futaba tail servo, receivers, lighting and telemetry packages. What do you think? hummmm………………….
Yeah I saw that site and some other ones in my search. Oh yes: ching!! ching!! Folks...
What would you say if I told you I found a new Trex 450 Pro kit. It comes with a good ESC and motor for $217.00 delivered... I figure I could use my Spartan gyro, 3 HiTec HS-65MG cyclic servos, 1 Futaba tail servo, receivers, lighting and telemetry packages. What do you think? hummmm………………….
Rob Lancaster
Well-Known Member
It got a flybar, it's a 450 pro..
What's the difference between the 450 pro and 450 pro V2?
What's the difference between the 450 pro and 450 pro V2?
Rob Lancaster
Well-Known Member
Wow the Pro came with both flybar and flybarless, interesting...
Telling ya, I'm thinking about that 450 Pro for $217.00 bucks...……
Telling ya, I'm thinking about that 450 Pro for $217.00 bucks...……
Rob Lancaster
Well-Known Member
It's brand new and comes with the motor and ESC.. I have the rest. Seems to be a better choice than spending more than that to get all the SE V2 parts.
By the way, just how old is the 450 Pro??
By the way, just how old is the 450 Pro??
murankar
Staff member
I am a purist then, lol. I am a firm believer in giving credit to Compass for the design. Anyhow getting on to the topic at hand.
Have you considered Tarot parts for the upgrade. I know its not Align but they have a great reputation for putting out quality Align products. You might be able to get a new head for cheaper or even a used Tarot head.
Have you considered Tarot parts for the upgrade. I know its not Align but they have a great reputation for putting out quality Align products. You might be able to get a new head for cheaper or even a used Tarot head.
Tony
Staff member
Tarot is a great brand. In fact, Tarot and ALZRC are the same brand. Same factory, different screen print or laser engrave. The Devil 450 I have behind me is the same as a Pro V2 and it only had one issue and that was the head lmao. It was drilled 8mm too high which I have a live stream of me redrilling it live. Or, you could have used a DFC main shaft which is 8mm shorter than the FBL main shaft. But Tarot or ALZRC are fantastic kits. Below is the kit that I built. And it is FANTASTIC for what it is. I did put the Tarot DFC head on it which I have not flown yet though.
With that 3 axis gyro, you can either use the receiver you have now, or you can order a microbeast satellite adapter if you are using spektrum. This gyro is a clone of the MicroBeast. I have not flown it yet, but have heard great things. I will be doing a comparison soon between the Microbeast and the clone. But you can't go wrong with this kit. You already have the motor and ESC so you are set there. The other electronics are very fast and very strong for their price. Just another option for you.
Helicopter Kit: ALZRC Devil 450 Pro FBL Kit Empty Helicopter DIY Part
Cyclic Servos: ALZRC Devil 380 420 480 Parts DS452MG 450 CCPM Mini Digital Metal Servo
Tail Servo: ALZRC DM1531T Medium Digital Metal Locked Rudder Servo for Devil 380 450 480 500 Pro
3 Axis Gyro: TGZ380 3 Axis Gyro Flybarless System for Align T-REX RC Helicopter
Tarot DFC Head: Tarot 450DFC Split Locking Rotor Head Assembly TL48025-1
Cyclic Servos: ALZRC Devil 380 420 480 Parts DS452MG 450 CCPM Mini Digital Metal Servo
Tail Servo: ALZRC DM1531T Medium Digital Metal Locked Rudder Servo for Devil 380 450 480 500 Pro
3 Axis Gyro: TGZ380 3 Axis Gyro Flybarless System for Align T-REX RC Helicopter
Tarot DFC Head: Tarot 450DFC Split Locking Rotor Head Assembly TL48025-1
With that 3 axis gyro, you can either use the receiver you have now, or you can order a microbeast satellite adapter if you are using spektrum. This gyro is a clone of the MicroBeast. I have not flown it yet, but have heard great things. I will be doing a comparison soon between the Microbeast and the clone. But you can't go wrong with this kit. You already have the motor and ESC so you are set there. The other electronics are very fast and very strong for their price. Just another option for you.
Rob Lancaster
Well-Known Member
WOW! I love it! Options!!
I'm going to need some time to go over all this shhhh,,, I mean stuff, ha!
By the way, what's a K- bar??
Does Tarot and or ALZRC make a flybar version of a SE V2 head? That might be all I need. If at all possible, I hope I can just upgrade the head.
Then again that Devil 450 pro is cool too!
Oh man,, I need to think about it all.
Keep it coming though!
I'm going to need some time to go over all this shhhh,,, I mean stuff, ha!
By the way, what's a K- bar??
Does Tarot and or ALZRC make a flybar version of a SE V2 head? That might be all I need. If at all possible, I hope I can just upgrade the head.
Then again that Devil 450 pro is cool too!
Oh man,, I need to think about it all.
Keep it coming though!