blade length change

[Zinner]

Hello Everyone,

I have always been using 315 woodies on my heli and recently change to 330 woodies, question is do I need to alter my pitch and throttle curves to suit the new longer blades? Thanks in advance!

[Kam]

I switch between 325 & 315 and fo not alter my pitch/throttle curve. But of course at times i will still fiddle with them... i dun have a "fixed" TC/PC that i do not touch again. maybe i shld stop fiddling with them!

[rkte]

I have tried changing the woodeen blade from 315 to 335 without changing the TC and PC (only do blade tracking).
I just feel more on climb-up power but less response on cyclic as overall result the heli more stable.

[Super-Hornet]

I use 315, 325 and 335 blades and my favorites will be 335 blades.

You should not require to change the pitch actually (depend on personal preference) but u may or may not need to change the throttle curve instead.

For me, my pitch curve remain straight linear curve (That is 50, 75, 100. Or 0, 25, 50, 75, 100). The reason I do that is that:
I want to have linear/consistant collective control. Assuming motor speed is constant or when u are running in governor, then linear line will give u a constant collective control. (not exponentially changes).

Now, as more pitch increases (also if longer blades using), the air drag/friction increases. With that, motor slow down. That is where the throttle curve comes into play. U want to adjust in such a way, the motor or Rotor RPM remain as constant as possible for all pitch position. Normally the end result is that the throttle curve is more like a exponential curve. That is why if u have more throttle curve, u can have better resolution to tweak the throttle curve in order to achieve constant RPM. If u use those 3 point curve, u tend to feel/hear that the motor spin faster and faster as u increase the collective stick.

As I mention before, when u have longer blades, the cyclics will be slower a bit. Some do not feel it at all. The reason of longer blades having slower cylics is because of "Gyroscopic Inertial Effect". The Gyroscopic Inertial Effect also help you to make the heli more stable.

That is why I prefer longer blades.

SH

[Zinner]

Thanks my friends, will try to fly without changes and work from there. By the way, anyone dynamically or statically balance their new blades B4 installation? Or is it just a waste of time due to the short length as compared to Nitro's?