what is the ultimate tail blade?

[Crazy L]

Hi guys

I'm one of those people with a dodgy tail on an mcpx bl, and after reading a lot of the threads on here, where people have had success with different things to solve the problem, I was wondering, is the a consistent tail blade you are all using?

Thought I'd start with that.

[tomatwalden]

I don't have a BL anymore, but when I did, I used the Lynx tail blades ...

[heliboy]

What do you mean by dodgy ?

[Crazy L]

What do you mean by dodgy ?

Tail wag, it turns out it is an inherant problem on the BL, and lots of folks point to, amongst other things, the tail blades.

@Tomatwalden, I've read somewhere the Lynx ones are brittle. Is that just luck of the draw and scaremongering? We all know what forums can be like.

[tomatwalden]

TBH, tail wag is fairly inherent on ANY micro helicopter with a fixed-pitch tail driven by a motor. It's physics really, a motor cannot change speeds quick enough to respond instantly to change in heading. This is why larger helis use a variable pitch tail and very fast servos on the tail. It means that the change in thrust provided by the tail rotor is almost instant.

I found the Lynx blades to be better - and they came in different colours for visibility and bling. I never found them to be any worse in a crash than stock blades TBH. They're so cheap anyway I wouldn't worry about it! If they do break, it will be because of a crash, not the reason for the crash!

But if you want a locked-solid tail, you need to look towards larger helis with variable pitch tails ...

[Crazy L]

If you want a locked-solid tail, you need to look towards larger helis with variable pitch tails ...

Cheers. The mcpx is my latest addition and micros are a new thing for me as I already have a 450 and a 500. I thought the tail would be a litttle more stable that's all. Maybe in the future I'll plumb for a something with a driven tail.

[james_2k]

The trex 250 tail is very sensitive too. Never got it totally locked in

[heliboy]

Tail wag, it turns out it is an inherant problem on the BL, and lots of folks point to, amongst other things, the tail blades.

@Tomatwalden, I've read somewhere the Lynx ones are brittle. Is that just luck of the draw and scaremongering? We all know what forums can be like.

Ah ok i see what you pointing to now.
I found running a flat line id1 at 80 sorted it out a little..

[tomatwalden]

Cheers. The mcpx is my latest addition and micros are a new thing for me as I already have a 450 and a 500. I thought the tail would be a litttle more stable that's all. Maybe in the future I'll plumb for a something with a driven tail.

To a certain extent, you've got to take micros for what they are. They are not big helis, nor do they fly like them for the most part. BUT, They can be HUGE amounts of fun - with very cheap consequences when you get it wrong!

I am going to big up the 180CFX - In my view, it is simply the best micro out there by a long chalk. The Oxy3 is looking quite nice too, but it's a kit and substantially more expensive. I like my 300CFX also, but I'll be honest and say that the stock electronics (ESC, motor and servos) are fairly lame.

Personally, I really didn't get on with the Trex250 either. I found it to be a real twitchy bugger and DFC on micros is fiddly beyond belief.

Go for a 180 (which is a torque tube tail BTW)

[myxiplx]

On the mCPX BL the main tweaks are to improve tail holding in harder moves, as mentioned above you can't ever reliably get all the wag out, it's designed as a high performance 3D flier, not a smooth graceful flier. One of the compromises they had to make to have the tail powerful enough for the 3D moves was to have it a little too aggressive for them to tune all the wag out with the gyro gain.

The best tail on the BL is generally to fit an extended solid carbon tail boom (Lynx have one, plus the wire you need), and then the Lynx 42mm tail blades.

Failing that, to really get rid of the wag you can do a full outrunner upgrade, and flash the tail ESC with the BLheli code, but that's not a cheap or easy upgrade at all.

The trex 250 tail is very sensitive too. Never got it totally locked in

The 250 has a few options. Fundamentally you just need a very fast tail servo, a DS95i does the job with brute force, but it's a bit heavy. A great alternative is a DS76t, plus a set of chinese weights and the stock 37mm plastic tail blades. I'm running the DS76t on mine, it's lightweight, very fast, and with the VX1e controller the tail is just solid.

[Crazy L]

I found running a flat line id1 at 80 sorted it out a little..

Ok cheers, May I ask what an id1 is? Cos, to quote Temperance Brennan: "I don't know what that means".

@Myxiplx, I have an extended solid boom already, made for own for about £2. Extended by 15mm. With a Lynx tail blade, came yesterday, although mine is bigger than the OE Item. Maybe I ordered a larger one, as I didn't measure to see how big they were. I'm assuming since you mention the length in mm, there are other sizes available?

[myxiplx]

People used to go for 48mm blades if my memory serves, but they tend to overheat and blow the stock tail motors. The standard Lynx blades for the mCPX BL will be 42mm, they're a little stiffer than stock which unfortunately makes them more fragile, but they were generally regarded as the best overall.

The flat line throttle comment above just means run a single throttle range for the whole flight. 100% flat out throttle is great for 3D, a slower throttle fixed to something like 80% will tame things down, and will also make life a little easier for the tail.

What is your problem with the tail, is it wag during hovers, or problems holding during 3D moves?

[heliboy]

Ok cheers, May I ask what an id1 is? Cos, to quote Temperance Brennan: "I don't know what that means".

@Myxiplx, I have an extended solid boom already, made for own for about £2. Extended by 15mm. With a Lynx tail blade, came yesterday, although mine is bigger than the OE Item. Maybe I ordered a larger one, as I didn't measure to see how big they were. I'm assuming since you mention the length in mm, there are other sizes available?

Idle up 1.

[Crazy L]

What is your problem with the tail, is it wag during hovers, or problems holding during 3D moves?

It wags terribly during simple left and right and a little while hovering. 3D? not a chance, I've only just mastered a figure of 8 with my 500, and that's only in one direction, lol.

Idle up 1.

Yeah, I don't think I'll be needing that for a while.

[james_2k]

I can't even do sustained inverted yet and I only use idle up modes. I far prefer them