Post by: Barry Tilson on April 29, 2015, 06:52:02 PM
I have been tuning the engine and have found a nice sweet spot.
The mid range need seems to be easy to adjust. I found that the high needle in idle up at two turns seems to cause a run ability issue where the head speed sags and the smoke reduces. Landing and starting from normal mode seems to bring it back around. I thought it was to lean on the high needle. So I richened it and didn't help. So checking the manual I went just south of two turns. This seem to help it preform better.
So can you run a nitro to rich?
Does anyone have a recommended head speed for Idle up 1&2?
Post by: flyalan on April 29, 2015, 10:46:51 PM
So you need to be on the high needle long enough to determine if it is set correctly. Do some hard big loops. Land and immediately feel the engine backplate. If you can hold your finger in place comfortably much longer than a five count or so you are too rich. Keep leaning a couple clicks at a time. Once satisfied adjust the mid range for reliable throttle transitions.
I run mine at 2050 in idle 1 and 2150 on idle 2.
Cheers
Alan
Post by: Barry Tilson on April 30, 2015, 05:04:12 AM
You first need to set your high speed needle. Playing with the mid range without the proper high speed needle setting will only lead you awry.Ok, yes I had the whole thing way to rich. The back plate was just warm at first. I re-watched the Nitro Smacktalk video and understand what your saying with regard to the loops. I will give this a try and see how the back plate feels.
So you need to be on the high needle long enough to determine if it is set correctly. Do some hard big loops. Land and immediately feel the engine backplate. If you can hold your finger in place comfortably much longer than a five count or so you are too rich. Keep leaning a couple clicks at a time. Once satisfied adjust the mid range for reliable throttle transitions.
I run mine at 2050 in idle 1 and 2150 on idle 2.
Cheers
Alan
I also have a head bobble at idle up 1 that may need some tuning. I have all the gains the same on the CGY 750, so will have to lower it for the 1900 range. No bobble at 2200.
Idle up 1 at 1900 feels ok, idle up 2 at 2200 is very perky. No bogging what so ever. However the fuel economy at idle up 2 is just shy of 6 min. So I must be still a little rich and maybe drop the head speed 100 rpm to 2100? I'm guessing 7 minutes, maybe not with the 626's and 60sr?
Is there any way to get a smooth transition out of throttle hold? Like a ramp up, it seems to bog a bit and kick the tail hard. (14sg radio)
Honestly it feels like a very light E7. Very floaty and fast. The strong winds were blowing it a yesterday.
The pirouette rate is insane! May have to turn it down also, it's fun however I could see it getting away from me.
Overall a very fun experience. I must be getting comfortable as normally my hands would be a little shaky after flying a new heli like this. I like the current feel of the CGY 750 and didn't even flinch about not having the bail out that I'm used to with the BD3sx. This must mean I can switch over to big boy undies! Can't wait until I tell my mom!
Post by: Rodney Kirstine on April 30, 2015, 09:22:59 AM
Quote
Is there any way to get a smooth transition out of throttle hold? Like a ramp up, it seems to bog a bit and kick the tail hard. (14sg radio)
You want to set your normal mode to have a linear throttle curve from 0-100 and spool up using it. Once you get to about mid-stick, or are hovering, then you can switch into idle up. Nitro governors don't have a "soft start" like ESCs do.
Post by: John Jackson on April 30, 2015, 03:17:25 PM
Post by: Barry Tilson on April 30, 2015, 05:06:58 PM
Post by: Barry Tilson on April 30, 2015, 06:22:34 PM
Post by: Darren Lee on April 30, 2015, 07:11:12 PM
Post by: Barry Tilson on April 30, 2015, 08:03:09 PM
I'm running the 55HZ-R but my headspeeds are 1950 and 2150. Idle 1 for relaxing smooth flight and piroflip practice, idle 2 for fast flight and smack.So I'm in the range. I will play around with some different settings to see how I handles.
Post by: Barry Tilson on May 07, 2015, 08:03:33 PM
Post by: John Jackson on May 07, 2015, 09:20:46 PM
Post by: Barry Tilson on May 08, 2015, 09:37:15 PM
I know this is counter intuitive,but the general idea is to lean it when the weather gets warmer. You should notice that the engine is running like it's too rich and lacking the same power. One way to think think about this is colder air is more dense i.e. more oxygen and warmer air is thinner with less oxygen. keep in mind there is a point where you can tune too lean, but a couple clicks should do it without much harm. Glad you're loving the nitro!
Thanks John!
Yeah I understand the concept with fuel mixture. More concerned about the temperature. Seems like you can easily hurt this Ys motor, just trying to understand what the limitations are.
Looks like your from Michigan? I'm over in grand ledge.
Thanks,
Barry
Post by: John Jackson on May 10, 2015, 09:12:07 PM
Post by: Barry Tilson on May 11, 2015, 08:09:04 PM
yes sir! are you coming to the mid-America fun fly? if not we can meet up and do some flying somewhere. I know a few spots between us....i'm in the Detroit area.I might come out on Friday, however can't make it Saturday.
Post by: Barry Tilson on May 13, 2015, 08:16:50 PM
21 flights no crashes, almost hit a tree today.
I think the other four Synergy's are jealous.
I always get real busy with work this time a year and it's great just to grab a charged flight pack, nitro and get a few flights in.
Post by: Barry Tilson on May 17, 2015, 11:30:11 AM
Post by: Barry Tilson on May 18, 2015, 04:26:32 AM
Post by: Mike Spano on May 18, 2015, 10:15:30 AM
Post by: Mike Spano on May 18, 2015, 10:16:26 AM
Post by: Barry Tilson on May 18, 2015, 05:24:38 PM
Post by: Mike Spano on May 19, 2015, 10:43:52 AM