How much tail pitch do you have and use? Please add your info.

[BenScoobert]

Can you just help me out here, we are just doing a bit of experimentation and wondered how much tail pitch does your model allow and do you use it?

Please post:

1. Model and size
2. Tail blade size
3. Max tail blade pitch mechanically available
4. Max tail blade pitch you actually use

Also any other input is welcome.
Thanks

[mahbouni]

I don't use any tail pitch as I can only hover tail in. Saves me a fortune on tail servos

[BenScoobert]

i don't use any tail pitch as i can only hover tail in. Saves me a fortune on tail servos

finally, i am not alone!!!!!!!!!

[helimadness]

not sure it is that easy to measure with most peoples kit. i have a RC logger V1 Dig gauge but not sure it is possible to measure tail pitch with it. Maybe could lay my heli on its side and try and attach. Or tape on.
On my 500 just use max available and let the FBL unit do the rest. On my Goblin I have it stop a couple mm short as people reckon they have too much travel. Im not good enough to really comment so set it up to what the majority recommend and it works fine.
Not something that I have really worried about but for sure all part of the puzzle

[Planehazza]

Sorry it's not much help, but once I have my tail set up to hold mechanically (neutral pitch offset) I use up all of the tail slider, and then set the yaw rate electronically. Better to have it available and not need it IMO.

However, if the two end points are drastically different due to model geometry etc, then I'll just not go all the way out the the tail hub, as you would very rarely go that far in flight I think.

[sp4rky-m4rky]

From anyone’s experience, do any models allow excessive pitch to the extent that the tail blades are caused to stall? Until then I can’t see any need to limit the travel, Just leave the FC to work it out.

[Planehazza]

From anyone’s experience, do any models allow excessive pitch to the extent that the tail blades are caused to stall? Until then I can’t see any need to limit the travel, Just leave the FC to work it out.

With the slider all the way to the rotor hub on some models gives a lot of pitch - I wouldn't be surprised if blades stall at that point.

[BenScoobert]

From anyone’s experience, do any models allow excessive pitch to the extent that the tail blades are caused to stall? Until then I can’t see any need to limit the travel, Just leave the FC to work it out.

That's exactly what we're thinking, we've measured at almost 40° which we suspect may be stalling.

[trillian]

That's exactly what we're thinking, we've measured at almost 40° which we suspect may be stalling.

I remember reading something from Angelos at Spartan about there sometimes being more mechanical pitch available than you need and about blade stall at extreme pitch.

There was a video on here some years ago with a camera mounted facing the rear of a heli, I think it was a Trex 550, and one thing that stuck with me was how little pitch the tailrotor needed in flight. But obviously it depends on blade size, tailrotor ratio, headspeed and flying style etc.

I was going to measure a few of mine and then realised I don't have anything that goes that high. The Rave ENV has a crazy amount of pitch available in the direction that counters the rotor torque, it looks like 50 degrees or something, it will likely never get anywhere near there.

[Gate88]

Every model I've ever had I've maxed out the tail pitch, unless I was going to put mad long blades on there I can't see the point in limiting it.

[helijohn]

Every model I've ever had I've maxed out the tail pitch, unless I was going to put mad long blades on there I can't see the point in limiting it.

Same here until I found the blade could strike the boom recently.

[uiron]

on warp 360 (60mm blades) it's allowing a lot of blade pitch, like more than 45 degs on both sides, which is at the edge of stalling - and thats with the shortest available servo horn. actual tail pitch used - don't know, using FBL (SK540) to electronically set tail rates to my liking.

[JoeBailey]

Gaui x4 2
31 in each direction all throw used in setup. 61mm blades I think.

Raptor g4
34 and 39 all used in setup.
running rail 116 blades.

Spectra g
25 and 48 all setup
Running SAB 120 tails

All machines will knife edge piro at medium speeds with perfect piro symmetry.

An interesting point Ben, the spectra uses a crown gear system and even after carving a trench doing autos I've never striped any gears. I believe the gaui X7 also uses a crown gear and thats pretty damn solid.

[Varelco]

From anyone’s experience, do any models allow excessive pitch to the extent that the tail blades are caused to stall? Until then I can’t see any need to limit the travel, Just leave the FC to work it out.

Yes, some of the Logos do, you have to limit the throw. I stalled the tails on my 600SE because I used full throw, fortunately the belt jumped off and didn't snap.

[p4ddy]

Gaui 200, if you go too far it hits the bracket however it is possible to go past it but then you is fooked