Recommended headspeeds

[meshushelly]

Originally Posted by dyuen888

So what head speed did you finally use?

Fixed end points, dont know the actual head speed.

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[Daddy B]

In the manual it states that the head speed should be between 2600 and 2700 rpms, which is way higher than the CC ESC allows. Is that just a typo in the manual?


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[ryem3]

Actually, the manual says to run it at 100% throttle (slant gear V2) up to a smoking 2800 RPM!
How do you do this with the CC? Throw in 7S to trick the calculator, or just run fixed endpoints and use fixed 90% and 100% throttle curves? Is the governor mode really better than just running 100%? It seems that people are surviving at governed 2200 headspeeds, but that just sounds really slow compared to the chart in the 550 manual. It even sounds like the numbers in the 550 manual could be wrong, as suggested above.

[Full Montee]

Fixed endpoints in my stock FB 550. With 550mm Rotortech (heavy) blades I get 7mins of flight at a tached headspeed of 2350. 90-80-90 that's my idle1. Idle2 is 100-90-100 and that tachs at 2550 With 5mins of flight time doing the same manouvers.

[ryem3]

Anyone else?

[mtuccio]

Stock setup running at 100% flat curve on ESC will yield 2550-2600rpm.

If you factor in the head room needed for the Castle governor to work correctly then this is why you are limited to 2250-2300rpm in the software.

If you want more head speed then you are going to need to change the gearing from 11T pinion to a 12T one and this will let you bump up the headspeed in the Castle software.

Hope this helps....

[ryem3]

I just got mine from someone and it is running a 16t pinion, which I note is the stock pinion. Why would one gear down to an 11? Looks like the manual is close to correct on head speeds.

[1004ron]

Originally Posted by ryem3

I just got mine from someone and it is running a 16t pinion, which I note is the stock pinion. Why would one gear down to an 11? Looks like the manual is close to correct on head speeds.

11t or 12t is for the slanted gear.

[mtuccio]

Originally Posted by ryem3

I just got mine from someone and it is running a 16t pinion, which I note is the stock pinion. Why would one gear down to an 11? Looks like the manual is close to correct on head speeds.

Sorry...I should have stated that I'm running the 112T Helical gears on my 550's in my post. Your heli has the 170T straight gear (v1 and early v2) which would have come with a 16T pinion as stock. In this case you want to use a 17T pinion to get more head speed when using the governor.

Hope this helps...

[ryem3]

No problem. Thought I was loosing my mind or I was going to have the only 550 turning 3000 rpm!

[mtuccio]

Originally Posted by ryem3

No problem. Thought I was loosing my mind or I was going to have the only 550 turning 3000 rpm!

No actually the opposite....you would have dropped the no load head speed to 1750rpm.....

[celm]

would having a gov gain to low give it the feel of low headspeed?

[Daddy B]

So what is the correct head speed? Is the manual incorrect?


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[hidaven]

OK, so those of you that have tried BOTH governor and fixed endpoints. Whats the actual flying experience with one way vs. the other?. Most people are using between 2250 and 2300 HS for governed and 2500-2600 fixed end points. Thats a pretty vast difference. Whats the real world difference between flying with a faster HS in fixed or a governed lower HS? Besides better governed runtime : ) Is the higher HS better for tail gyro and FBL systems?

[Way2evl]

Originally Posted by celm

would having a gov gain to low give it the feel of low headspeed?

Having a gain too low you will hear the helicopter struggling to find the head speed you desire. It will sound like its cutting in and out. It will not necessarily sound like too low of head speed. Too low of head speed is exactly that, too low of head speed.

[Way2evl]

Originally Posted by Daddy B

So what is the correct head speed? Is the manual incorrect?


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The manual is correct!! The helicopter was designed to be ran on an Align ESC which most people realized wasn't that great. When you run the align esc you run non governed, which makes your head speed with the gearing and 100% 2600 rpm. That's how it was designed to run. When you start switching to the Castle you want to run the heli in governor mode which a lot of people like because it will give you the same amount of power at the beginning of the flight as at the end. Only problem is is that the Castle doesn't give you room for that high of a governed head speed and no one is changing their gearing. So many people have switched their esc and have been running a governed 2300 with Castle that it has become the norm. It is not normal, that is extremely low head speed. You have to change your gearing. Then you can run what the manual has called for and also governed and you have the best of both worlds. I run a governed 2600 HS with a 115/14t set up. Hope this clears up the confusion.

[Way2evl]

Originally Posted by hidaven

OK, so those of you that have tried BOTH governor and fixed endpoints. Whats the actual flying experience with one way vs. the other?. Most people are using between 2250 and 2300 HS for governed and 2500-2600 fixed end points. Thats a pretty vast difference. Whats the real world difference between flying with a faster HS in fixed or a governed lower HS? Besides better governed runtime : ) Is the higher HS better for tail gyro and FBL systems?

Higher head speed feels like more power. The difference would be hopping from a Honda to a Corvette. If you like to fly slow (Honda) you don't need the head speed. You can cruise around all day and get better gas mileage (flight time). If you like to rip up the streets and do it in style from point A to point B you'll of course hop in the Corvette (higher HS) It will be a much more spirited drive with taking every turn as fast as you can and excelerating from stop light to stop light and living life to the fullest. That is the best way to describe it. Higher HS is better for those who have a flying style that requires it. If you want to do crisp clean 3D maneuvers you need the head speed to maintain. It really makes no difference to the components you use except the tail.

[shein95]

i had to go back to straight throttle curve about a month ago to chase a problem and even running 90-100 flat curve and the higher hs that came from it the heli lost a lot of pop on hard punch outs, for me it bogged much more than when on 2200-2300 governed hs. could be the predictive nature of the vbar gov that gives the extra punch even with the lower hs and i got a bit more flight time on the governed mode. after running both i would def prefer to not run flat curves again.

[ryem3]

Originally Posted by shein95

i had to go back to straight throttle curve about a month ago to chase a problem and even running 90-100 flat curve and the higher hs that came from it the heli lost a lot of pop on hard punch outs, for me it bogged much more than when on 2200-2300 governed hs. could be the predictive nature of the vbar gov that gives the extra punch even with the lower hs and i got a bit more flight time on the governed mode. after running both i would def prefer to not run flat curves again.

Very interesting comments, thanks. I may try to go back to gov mode and compare myself.

[Daddy B]

Originally Posted by Way2evl

The manual is correct!! The helicopter was designed to be ran on an Align ESC which most people realized wasn't that great. When you run the align esc you run non governed, which makes your head speed with the gearing and 100% 2600 rpm. That's how it was designed to run. When you start switching to the Castle you want to run the heli in governor mode which a lot of people like because it will give you the same amount of power at the beginning of the flight as at the end. Only problem is is that the Castle doesn't give you room for that high of a governed head speed and no one is changing their gearing. So many people have switched their esc and have been running a governed 2300 with Castle that it has become the norm. It is not normal, that is extremely low head speed. You have to change your gearing. Then you can run what the manual has called for and also governed and you have the best of both worlds. I run a governed 2600 HS with a 115/14t set up. Hope this clears up the confusion.

Thank you so much! I have always run the CC ESC, and honestly, the head speed seemed low. I will probably leave it, since I have a 75A ESC, and need to watch my current draw.

Thanks again!


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