More payload = more lift needed. But how do you do it?

[Michael Fox]

Hello!

There is a few things I'm wondering about when I'm about to go airborne with my DSLR and Trex600, like:
*Do you calculate your pitch gauge depending on your payload in any way?
*Is there a certain rule to witch weight=pitch^ ??
*Or do you adjust it with; like changing for longer blades or a 13t motor pinion instead of a 10t?

Cause you obviously need more lift from the heli with more load underneath, right?

I hope a can get some tips and suggestions from ya'all :wink:
Thanks :D
Michael Fox

[bullaculla]

semi symmetrical blades will provide more lift. And also going to a bigger pinion will increase your headspeed, and for AP, you usually want a lower headspeed to give you longer flight times and less vibes.

If you want, I can resize my first test shoot video with a stock trex600 and the XL motor with an Askman360 mount. I got a comfortable 3 minute flight time with a FP4900 6s Lipo. I even tried a full pitch climbout and the power was impressive! ...my flying, not so impressive :mrgreen:
http://photos.imageevent.com/bullaculla1/heli/large/OB8J1527.jpg

[Michael Fox]

Hehe :D

With that mount you use 3 extra channels on your radio, right? One to Pan, one to tilt and the last one for the shutter?

I got to see that video!! So if you would upload it, that would be very helpful :)

MF

Edit: The semi sym blades are the ones with a rounded tip, right?

[bullaculla]

The Askman camera mount on my heli can constantly pan 360, so its self contained. I use another radio to operate the camera, and another person next to me to control it. The video is my first time flying with the mount (so dont laugh) and I told teh operator to just swing the camera at will so I can see how the heli reacts to the mounts movements. Just save target as or click to view. this is a stock setup with the align CF blades. Edited out embarassing takeoff and landing :mrgreen:

http://photos.imageevent.com/bullaculla1/heli/trex600-APtest.wmv

About blades, hopefully someone with more knowledge can give better description.
-Flat bottom (same cross section as a airplane wing) provides the most lift, but will balloon with wind changes. The shape will give lift even at 0 pitch.
-Symmetrical has the same curve top and bottom so no lift without pitch, but wind has less effect on altitude.
-Semi symmetrical is a nice mix in between Flat bottom and full symmetrical blades, but are hard to find for the 600.

BTW, we were shooting blind. no preview downlink on this flight. Still waiting for it.