hover troubles/power curve

[kfc]

when flying in normal mode, where in the throtle curve should I start hovering?
I've heard 50% throtle, but right out of the box my hb cp2 would hover at about 75% with the trim at 0, and 60% with the trim at 100%, but that was befor I adjusted the pitch angles properly. I recently crashed and bent the main shaft and one push rod, instead of taking everything apart I just replaced the entire head with the one from my barebones kit, I adjusted the pitch angles so they were at 0 when my stick was at 0 in normal mode, and adjusted the pitch of the flybare paddles to 0, I get a full 10 degrees when the throttle is at 100%. but now I cant even leave the ground when my trim is at 0, and I barely lift off with it at 100%. everything is stock except for a twin motor mount and carbon fiber blades.

I cant think of anything else thst could be preventing me from hovering.
in desperate need of help
KFC

[carlo_the_wonder_frog]

Sounds like it may be a Head Speed problem. If you have a tach check the speed of the main rotor at 0 pitch. Normal hovering collective is at almost 3/4 stick on all my helis.

[F1Atom]

I have a similar problem with hovering and ascending and the Blade CP. I just changed the main motor and tail motor. Charged the batteries and went for a test. My heli would hover at 3/4 throtle at 0 trim at about 1 to 1.5 ft off the ground pretty well. But when I go full throtle to ascend it bogs the motor and and falls back down and bounces back up 1 foot of the ground into hover. At this point the motor sounds like its about to have heart attack. I've tried to play with the pitch curves to increase head speed but I can't get off the ground, even if I bring the trim up to 50%.

I dunno if its the battery, charger or the pitch curves.
Any suggestions or tips on how to solve this problem.

I currently use two stock NiMH batteries and both of them exhibt the same problem. Both batteries are about 1 month old from date of purchace. :arggg: :arggg:

[Jermo]

I'm new so forgive me if I tell you something totally wrong. Everything I've read says hover is at 75% throttle :dontknow
Jermo

[Pinecone]

Hover should be at over 50% stick. Basically both normal and idle up curves are set to be 0 pitch at mid stick. This is so that things don't change when you switch from one to the other.

With my Blade CP with flat bottoms blades and the 8t pinion on a 3S lipo the throttle CURVE is 0 - 50 -100 in normal and 100 - 50 - 100 in Idle up. I tached 1650 at 0 ptich at 50% throttle and the same at full up stick (about +10 pitch and 100% throttle) (tied the thing down to a saw horse).

If your trim is full down, you will have less head speed at any given stick position, so you will have to use more stick to hover.

I would not expect the stock brushed motors to be able to handle a full stick climb out.

[F1Atom]

So the head speed should remain the same no matter what the pitch? Right? Even with the stock NiMH battery.

[Skiddz]

In theory, yes. In practice, the stock motor/battery can't provide enough power for a full 9 or 10 degrees of pitch. A high kV brushless and 3 cell LiPo? Quite possible.