12T or 13T pinion on T500

[zsultan]

Currently i am using 12T pinion on my T500 with Throttle curves

Normal: 0,80,80,80,80
ST1 : 95,95,95,95,95
ST2 : 100,100,100,100,100

Head speed seems low in normal mode, because the tail vibrated vertically (low head speed). Everything is oK in idle up mode. Using 6S EVOLITE 2500mah lipo.

I dont do any 3D right now thats why i choose to go with 12T to get more flight times.

Did any of you using 12T have this tail issue? or is it better to go with 13T?

Thanks

[whaleboy]

I'm using a 12t w no problems in Normal... I just run my normal curves higher ;)

-David

[zsultan]

what do you have for your normal throttle curve?

[whaleboy]

for a while I was just running 0,50,100,100,100 and leaving it normal (still learning to hover, and need the headspeed to cope with the breeze). I recently tried dropping it and going to idle at 90, but I just like the higher speed better, so I brought idle back to 100 flat and I think I'm back to 0,50,100, 100, 100 on normal. I think I'm getting around 2750 with the 12t. I'll need to check the logs to see...

-David

[markswift]

I had the tail bobbing on a 12T - I used the same logic as you - don't do any 3D, so try the 12T.

Anyway - I put the 13T on last night, test flight just now, and the bob is gone and the heli seems more responsive.

By the way, I have a nice tame throttle curve of 0-45-73-90-100 on a pitch curve of 40-55-70-85-100 and the 13T seems to work great,

Mark

[whaleboy]

Correction... I checked and while I'll spike to the high 2700's and low 2800's, In a hover I'm averaging low 2600's or so rpm. I'm doing 7 min hovers with evolite 2500's, putting around 1800 back in the packs, so I could get a little more out of them if I wanted. And I'm taking the training gear off today, so thats 76g of weight coming off...

-David

[mk1spitfire]

running 12t. No tail problem.


Has anyone who run 12t and then upgraded to 13t, did you notice even more power?

[psindrup]

Why are you not running "bob's throttle curves"?

Normal 0-60-80-90-100
Idle-up 1 100-90-80-90-100
Idle-up 2 100-100-100-100-10

I am running the above normal curve with 12t on my T-rex 500, and it works perfectly.

Peter

[whaleboy]

Why are you not running "bob's throttle curves"?

Normal 0-60-80-90-100
Idle-up 1 100-90-80-90-100
Idle-up 2 100-100-100-100-10

I am running the above normal curve with 12t on my T-rex 500, and it works perfectly.

Peter

Because, at least on my heli, anything under about 95 throttle with the 12t just makes it feel really sluggish. Its just much easier for me to control with the higher throttle/headspeed, especially with a breeze blowing (which it is most days). If its easier for me at 100 flat, thats how I'm gonna fly it.

-David

[raptorz499]

Put the 13 tooth on it!!

[psindrup]

Because, at least on my heli, anything under about 95 throttle with the 12t just makes it feel really sluggish. Its just much easier for me to control with the higher throttle/headspeed, especially with a breeze blowing (which it is most days). If its easier for me at 100 flat, thats how I'm gonna fly it.
-David

But in normal, you are only at 80% and 12t

Try Bob's throttle curve or go for 13t

Peter

[inkspot1967]

im running a 13tooth on 6s 2500 evo

[whaleboy]

But in normal, you are only at 80% and 12t

Try Bob's throttle curve or go for 13t

Peter

80% of what? In normal I'm running more than that, and idle, 100 flat, which I like. At the moment I'm only using normal to spool up and then switch to idle as I lift off, and because my normal and idle speed is the same at that point, there is no change in power as I switch.

Not sure what the big deal is about "Bob's throttle curve"?

-David

[psindrup]

80% of what?

Why that "tone"?
Are you getting angry with me, because I am trying to help? :shock:

80% throttle curve on your transmitter, just as you are talking about 100 flat - as in 100%


In normal I'm running more than that, and idle, 100 flat, which I like. At the moment I'm only using normal to spool up and then switch to idle as I lift off, and because my normal and idle speed is the same at that point, there is no change in power as I switch.

In the suggested throttle curves there is no need to do the switch - but then again ...


Not sure what the big deal is about "Bob's throttle curve"?
-David

Do as you see fit.

Peter
Over and out.

[kraaijer]

I never looked at the 12T, I put the 13T on immediately. The T500 needs headspeed, 12T is cutting it too close for my liking.

I'm very happy with the 13. I am using the Governor for the moment on the Align Esc to try it out. Works fine so far... :)

[psindrup]

I
I'm very happy with the 13. I am using the Governor for the moment on the Align Esc to try it out. Works fine so far... :)

Just out of curiosity, what advantages do you get out of using the governor?

And what are your throttle curve settings in governor mode?

T.i.a.

Peter

[whaleboy]

Why that "tone"?
Are you getting angry with me, because I am trying to help? :shock:

No "tone" intended, I assure you. It was an honest question. There have been enough misunderstandings/ego clashes around here lately. You'd have to do a lot more than offer a helpful suggestion to get a rise out of me. ;)

80% throttle curve on your transmitter, just as you are talking about 100 flat - as in 100%

You said "But in normal, you are only at 80% and 12t". No, I'm at 100% in normal.


In the suggested throttle curves there is no need to do the switch - but then again ...

Once again, not sure I understand (its late, maybe I'm just being dense...). In your suggested curves both normal and idle1 are running at a lower speed than I like. In my setup I don't 'need' to go to idle either, I'm just trying to get in the habit.

Bottom line is that with the 12t, anything less than 100% throttle is too little for me. I could go to 13t, and get more speed, which I may try, but I still don't see the point of having an idle curve thats not flat... just makes the heli harder to control (for me anyway).

Whether I understand or not, all feedback is appreciated

:cheers

-David

[kraaijer]

Just out of curiosity, what advantages do you get out of using the governor?

And what are your throttle curve settings in governor mode?

T.i.a.

Peter

The advantage is that the governor takes care of keeping the same headspeed, no matter the load.
The throttle curve is therefore always flat, 85% in my case.

So my headspeed is around 2600 with any pitch I give it (or at least, that's the idea). Aligns governor never really did a great job on the BL35G etc, but the 60A of the T500 seems to do a reasonably good job.

Alternatively you can just run a 100% flat on idle up without governor.

Hope this helps.

Ron

[kraaijer]

Bottom line is that with the 12t, anything less than 100% throttle is too little for me. I could go to 13t, and get more speed, which I may try, but I still don't see the point of having an idle curve thats not flat... just makes the heli harder to control (for me anyway).

Whether I understand or not, all feedback is appreciated

:cheers

-David

Not having a flat curve is actually a good idea (unless your missing headspeed and really need the 100%).
The goal is to try to have a constant RPM. Flies so much better... Remember, this is not a fixed pitch heli where you control your hight with changing the RPM. Here you control the heigth with pitch and a fixed RPM.

[psindrup]

No "tone" intended, I assure you. It was an honest question. There have been enough misunderstandings/ego clashes around here lately. You'd have to do a lot more than offer a helpful suggestion to get a rise out of me. ;)

I fully agree. No more ego clashes, please. :thumbup:


You said "But in normal, you are only at 80% and 12t". No, I'm at 100% in normal.

Sorry, I missed that important point.


Once again, not sure I understand (its late, maybe I'm just being dense...). In your suggested curves both normal and idle1 are running at a lower speed than I like. In my setup I don't 'need' to go to idle either, I'm just trying to get in the habit.

Sure thing. ;)


Bottom line is that with the 12t, anything less than 100% throttle is too little for me. I could go to 13t, and get more speed, which I may try, but I still don't see the point of having an idle curve thats not flat... just makes the heli harder to control (for me anyway).

Could you explain a n00b what you are "missing" with the lower head speed?

I am primarily looking for flight time, but if you think that I will get "a better flying heli" changing to 13t, I would seriously consider that.

Whether I understand or not, all feedback is appreciated


:cheers
-David
Let's drink on that :cheers


The advantage is that the governor takes care of keeping the same head speed, no matter the load.
The throttle curve is therefore always flat, 85% in my case.

To give you 15% of "head room" for the governor to operate?


So my headspeed is around 2600 with any pitch I give it (or at least, that's the idea). Aligns governor never really did a great job on the BL35G etc, but the 60A of the T500 seems to do a reasonably good job.
Ron

I have heard/read that the governor in the stock 500 ESC is not up for the task either, but you are happy with it?


Best regards and thanks to both of you.

Peter

[whaleboy]

Could you explain a n00b what you are "missing" with the lower head speed?

I am primarily looking for flight time, but if you think that I will get "a better flying heli" changing to 13t, I would seriously consider that.

From one noob to another, if you are happy with the way its setup, you probably aren't missing anything. Fly and have fun. My problem was with a lower headspeed the heli just seemed sluggish... It would rubber band or yoyo up and down and the cyclic was slow to respond. When I went to 100% it seemed to behave better, and was more stable. Keep in mind I'm flying with a good stiff breeze blowing, not exactly a help to a noobie like myself.

And i have to make my second correction to an earlier post... I stated my HS as being higher than it was. I had set up the Eagle tree with the wrong ratio... based on a 13 instead of the 12 I'm running, so my actual average HS is 2500...

-David

[kraaijer]

I have heard/read that the governor in the stock 500 ESC is not up for the task either, but you are happy with it?

Peter

I flew with it yesterday, the first time I really had the chance to throw it around a little... Didn't budge :) So yeah, I gotta say that it looks like it is up to the task.
Now I'm flying mild 3D, no extreme stuff. Max pitch is set for +/- 12 degrees, could be that the big boys don't think it's up to the task with hard 3D stuff. I'm simply not that good. On the other hand, my collective management sucks (getting better though ;) ), so if it's able to keep up with me.

I suggest you try it out, it's simple to set up. If you don't like it, change it back.

If you do try it, let me know what you think.

Ron

[kraaijer]

by the way, when u do use the governor, make sure you use the mid throttle response, not hihg, otherwise the tail will "freak-out"

[psindrup]

Btw,- if I want higher head speed, with the least amount of current draw, is it more efficient to increase the throttle curve, or change from a 12t to a 13t pinion?

T.i.a.

Peter

[kraaijer]

Btw,- if I want higher head speed, with the least amount of current draw, is it more efficient to increase the throttle curve, or change from a 12t to a 13t pinion?

T.i.a.

Peter

As long as you don't go below 75%, cause that will only heat up your esc. Running 13 at 85 gives a nice headspeed for lazy flyin'