690 or 710

[Blademan]

690 or 710, whitch is better on stinger90 with YS91?

[Blademan]

:? anyone!!!!!!!!!!!!!!!!!!!

[heliengineering]

hi:

Due to the head blade grip to blade grip size its recommended the 690.
This size its bigger in the Stinegr 90 than many other models and with 680-690 the overall rotor diameter will be similar. If you use bigger blades you risk to "boom strike".

regards,

enjoy your Stinger!!!

[Blademan]

Thanks heliengineering :D

[flyinfool]

I have flown both the 710 and 690 blades on my Stinger 90.
The 710's do auto great and are better for big smooth aerobatics but you will want to run a different gear ratio and a lower headspeed to prevent bogging the engine.
The 690 are much better for 3D type flying.

[Blademan]

thanks flyinfool for the info, i'm not much for 3D but would like to know what gear ratio to use and headspeed for the 710 blades.

John :D

[flyinfool]

I did not have the 710's long enough to fully optimize them :roll: but I was getting my best result with the 11/93 (8.455) gears at 1750-1800 rpm. With this setup it is smooth powerful and precise but the cyclic with 710's is a little slow for 3D.
I never tried it but you might even want to consider trying the 11/95 (8.64).