joeycoates
Senior Heliman
Location: Dallas, Texas
| Well, I think that I finally have it right...
NOTE: When my temps are getting high in both graphs I am doing continuous tic-tocs or startionary rolls (with too much collective movement on purpose)for and extended length of time, 30 to 90 seconds. In other words I am really loading it up hard for extended periods of time and these long hard loads will probably not be very common in a regular flight.
Oh, the blue line is actually the CarbSmart adjusting the needle, the yellow line is the throttle in between the ATG and the throttle servo, and the brownisn line is the head temp.
In the first log I tried both the 120c setting and the 130c setting, it liked the 130c setting even though 130c would be way too hot if it really got there. The YS50 still had good smoke at all times, but I thought that it was a touch too lean so I opened it up about 4-5 clicks and did the next log. The gain is at 50% on this one.
Again it was set to 130c, but I overshot the needle to too rich so I have sense backed it down to in between the two, it will get hotter then the second log, but not as hot as the first. The gain is at 60% which I think is about right. Unfortunatly I could not test it out again as I got a little to brave on some piroetting autos and ate a set of front tail gears on a bad landing.. 
I have noticed a few things while doing the experamenting.
1. Even when set to 130c and really running leaner then I think was good (sounded pingy) the engine would not go above 200f when hovering in 80f temps while using the Align metal fan. Thats just as hot as it went while putting around so in my case at least using the CS or not I am going to get some temp deviations.
2. I could not run as lean as I am with the CS in the lean position if the CS were not on the helicopter. I am reativly confident that I would toast the engine seeing how hot it gets with the CS going to full rich which is over 1/4 turn. If I loaded it hard at the lean setting without the CS it would get HOT.
3. For me the 60% gain setting seems good, it went from full lean to full rich in 1.8 seconds at one point when the temps were rising fast which is a pretty quick transition.
4. I could have tuned the CS in without all of the datalogging by sound and smoke. My main reason to put the Eagletree equipment in was because I just could not believe that the preset temp ranges on the CarbSmart could be that far off, but in my case they are. Even before I added the equipment I was already up to the 120c setting and I did not think that that was hot enough, but I was afraid to go to the 130c setting as that is 266f. I thought that it sounded/looked like I needed to turn it up, but I was not sure if I could trust what I was seeing/hearing or not. Now the 130c setting WILL NOT WORK FOR EVERYONE!!! Other people are getting to where they need to be on the 110c or 120c settings, just because this worked for me does not mean it will work for others, it may be too hot of a setting if your CS temp gauge is reading more accuratly then mine is. Just read what your engine is doing at the different temp ranges and see if it looks happy. You should be able to see/hear it going too lean and be able to back out while setting it up if it is getting lean. Go slowly and start pushing it harder if it is doing well at the current temp before going to the next heat range. Once in the heat range push it harder a bit at a time.
In all the CS works, period. If I set my high speed needle to a setting that is as rich as it gets under a hard load then I would be spitting out raw fuel when hovering, conversly if I set it as lean as it is at the lean setting I would get a lean bog under load at best, and more then likely a siezed engine.
After all of that I like it.  |
I have a 2 week break from school after May 12th so I want to be flying and not tinkering too much.
