I am running 30 % CP fuel in a TT 70. TT Muffler. Carbon V-Blades 680 blades carbon tail blades. Stock gear ratio. I always have a bogging problem I can start with wild amonts of head speed but it goes away when I do really demanding stuff. I am running fairly rich. How can I get more constant head speed???? Could I change the gear ratio??? Do I need a bigger engine for what I am asking it to do??? By the way the engine is at wide open at about 7/8ths stick. Its just the last bit of pitch and cyclic that bogs it. Mainly in loops but also in flips and hard turns. Any help is greatly appreciated. By the way I have not put a pitch guage on it so i don't know how much total pitch iam using.
Thanks
Dustin

Try this as a quick experiment...

Reduce your pitch curve by 10 - 20% on the high side, and bring it up 10 to 20% on the negative so that your blades are never at quite as much pos or neg pitch..

Also, set up dual rates on your cyclic to about 80% so that you don't get as much pitch there either. These changes should only take about 15 mins. to do, and if you have another idle-up available on your transmitter (like, Idle-up 2 or 3), you could set it up there without changin your existing config.

Then try the maneuvers with these settings. Of course, they'll be a little slower, but if the engine doesn't bog, then you've found your problem (too much pitch for the power of the engine).

You can try leaning the engine, but it sounds like you have it running well. I'd try reducing the pitch a little first.

Regards,

- Ben1000

Do your-self a favor and get a pitch gauge, if you're serious about flying helicopters than you have to have one.

P.S. That gauge on the side of the heli is not very accurate, with all the linkages set according to the directions it was off 3 degree's on my R60, believe me there is a big difference from 10 degree's to 13 on your top end pitch. Good Luck!