Agile 5.5 head speed

[treff]

Could some one explain how to work out the head spead on
a Agile 5.5. I'm a bit confused (normal state) because the drive
is not direct from the motor. Motor is 1100KV. It seems
to be very high to me going into IU but maybe thats normal.
It certainly jumps around the sky. Thanks for any ideas

[Martind]

What esc are you using ?
I ran mine @ 2200. 2350 2500

[treff]

Thanks for the reply Martind, The esc is YEP 150amp. It just seems to me that at 95% throttle the head speed
is very high but by goodness it climbs at a very fast rate lol.

What esc are you using ?
I ran mine @ 2200. 2350 2500

[bigpops]

Are you using the governor?

If you're running 95% un-governed then that's probably going to be on the high side. Maybe even 2600rpm plus. The only way to know for sure is to have someone tach it with an optical tachometer.

I run mine at 2300 and 2400rpm using the Vbar governor. I get about 5 to 5 and a half minutes using 3500mah out of a 5000mah battery (FrSky current sensor, you got to love it) chucking it about a bit. Some tic-tocs, the odd loop, and some fast circuits. Running 2500rpm wasn't a massive jump in performance, but did knock a minute off my flight time.

I'd play about and find a head speed that feels right to you. The lower it is, the more time in the air. Even at 2300rpm, mine has ample performance. It really moves when you peg the collective.

[treff]

Thanks for the reply bigpops. No I don't use the governor and yes the head speed is very high. It's ballistic. I did a little flight
up the mountain near the house yesterday, went into IU and sort of floored it but up wards. I counted 3 seconds and lost it
in the low cloud but like you say flying time is very, very short. just managed to get back from across the valley and land.
I could hear the motor winding down. I will lower the overall throttle percent to about 75 and see how it goes. It's my
first foray into the larger heli and just finding my way. As yet only got one battery lol so not getting enough stick time
Thanks again for the info bigpops
Cheers

Are you using the governor?

If you're running 95% un-governed then that's probably going to be on the high side. Maybe even 2600rpm plus. The only way to know for sure is to have someone tach it with an optical tachometer.

I run mine at 2300 and 2400rpm using the Vbar governor. I get about 5 to 5 and a half minutes using 3500mah out of a 5000mah battery (FrSky current sensor, you got to love it) chucking it about a bit. Some tic-tocs, the odd loop, and some fast circuits. Running 2500rpm wasn't a massive jump in performance, but did knock a minute off my flight time.

I'd play about and find a head speed that feels right to you. The lower it is, the more time in the air. Even at 2300rpm, mine has ample performance. It really moves when you peg the collective.

[Martind]

Here you go Mr Mel's calc roughly using normal gov
Throttle 60%: 2389
Throttle 65%: 2463
Throttle 70%: 2537
Throttle 75%: 2610
Throttle 80%: 2684
Throttle 85%: 2758
Throttle 90%: 2832
Throttle 95%: 2905

[treff]

Thanks so much Martind. Blimey! no wonder it sounded so awesome and went upwards so quickly Wow! I certainly will
have to tone it down. That's brilliant now I know where I'm going. Thanks again for your time.
Cheers

[Martind]

What fbl unit are you using ? If it has a gov it will work better then the yeps. I would still see if someone could tac it for you. 2200 was plenty with 13deg on 570mm blades.

[treff]

Hi Martind, I am using the MSH brain. It does have a governor but I read the instructions and thought I would
keep it simple lol. Getting very long in the tooth here and I fly on my own so no one to get any advice from apart
from the internet. I will have another read to see if I can get through the fog lol. It's taken
me ages to get to this stage with this helicopter. I had a few problems with the bevel gear and torque tube
bearing but now it is running superbly.

[Grumpy]

The YEP ESCs have an excellent governor, basically a direct copy of the YGE. I'd try setting up the YEP in Gov store mode.

[treff]

Thanks Grumpy I certainly have some reading to do lol. I see there is a lead required for the Governor to work on the Brain but where does it
plug into, the esc? I've always just used the throttle curve in the past but the governor looks more efficient.

[Grumpy]

I'm not sure how you connect the YEP up to the Brain but as i said in last reply, the YEP itself has an excellent governor function. You need the YEP programming card to set governor Store mode. there is a certain procedure you need to follow to allow the YEP to record and store maximum RPM, but once done that's it set.

[treff]

Hi Grumpy. Thanks again for the info. I was looking at the price for a phase detector i think it's call and the yep goernor is the way to
go for my wallet if nothing else. I have the program card and have been looking at the youtube for instruction and it looks simple enough.
I will give it a go tomorrow if I get time. I certainly need to tame the heli down a little what ever I do lol. The Agile 5.5 is running great now after
replacing dampers in the torque tube, new bevel gear and believe it or not a new tail servo after it failed and caught one of the tail blades on the spin so
new tail feathers. The servo, which I sent back is lost in the post. I hope it turns up because it was the most expensive servo I
have ever brought in my life. Thanks again for your time. I have learned a lot to night and I am very grateful to all who have helped.
Cheers

[Martind]

Here's gov store @ 4v easy to do if you have the program card. There are plenty of utube videos on it.
Throttle 60%: 2236
Throttle 65%: 2306
Throttle 70%: 2376
Throttle 75%: 2446
Throttle 80%: 2516
Throttle 85%: 2585
Throttle 90%: 2655
Throttle 95%: 2725

[treff]

Hi Martind. Many thanks for that info and thanks for taking the time. If I get time I will have a go tomorrow but you saved me there from a first mistake I am running 7.4 approx volts so
I would have knackered the program card straight away lol. Thanks again for the info. You have made thing a lot easier.
Cheers