FLYINFOOL
Key Veteran
Location: Cudahy, WI
My Posts This: Topic Forum | Most of your setup looks good.
I would agree that 1500 may be a little low.
If you really want to run that low of a headspeed you will need to change the gearing.
At 1500 with the stock gears the engine is running really slow and well below the power band. This can cause difficulties tuning and weird vibrations.
With the stock setup it wants to run at least 1700.
Going to 720 blades will also give you smother control, more lift and better autos. Especially at the lower head speeds and geared for the lower headspeed. The 680's are great for 3D but a little quick for smooth flight.
On my Stinger 90 I started out with MAH 720's and did not like them because they were not quick enough for 3D. They made the heli fly like a trainer, Which I think is what you are really after.
Unfortunately I no longer have those blades. 
Jeff Borowski
Gohbee Field Rep |
