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Lift Off! Share your experience and questions on your first flight. Ask the experts their learning experiences


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  #17  
Old 02-05-2006, 07:13 AM
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Nidrah Nidrah is offline
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Re: first flight

Quote:
Originally Posted by BLACKHAWK DOWN
what excatly has to be adjusted and what has to be done to achive these "differnt" kinds of hovers....oh and will putting my throttle trim all the way up on stock parts help me lift better? i had it at 50% the whole time cause i didnt know what would happen if i changed it....i heard the throttle trim increases the head speed without adjusting the pitch..?
Blackie, I may be wrong on this but I'm gonna give it a shot. To get your heli trimmed in, set your trim sliders to mid position except the throttle. It should be set all the way down. These trim sliders allow you to make minor adjustments to your servos. Example: one servo is a little twitchy, moving on its own (you can hear this), you would then set the trim to add a little more/little less power to the servo to 'trim it' out.
Second, you need to be sure your swash plate is level to the main drive gear, with servos on. Front and side measurements are required to get it right. I'm sure you know to balance your blades.
Once you got that correct, starter up and see what she does after you get out of the rotor wash. If she leans left all the time, then you need to extend the left control arm on the swash plate 1/2 turn at a time. To my understanding, you should also move the right one the opposite direction if you need more adjustment. In other words, try to keep the adjustments as equal as possible. If the 1/2 turn didn't do enough on the left, a 1/2 turn on the right would be the next step. If it drifts right then just do the opposite. Same goes for the forward/reverse pitch. Only one servo arm here. Again, 1/2 turns until it's close to steady. You will always have some inputs, no getting around that.
The trim on your throttle does not adjust head speed in relation to pitch. It actually adds a micro amount of throttle, as if you moved the stick that hair amount. I think your bird is collective pitch, that means pitch is automatically added as you increase throttle, you'll see your swash plate move down as you increase throttle, adding pitch to the blades. I believe this is also adjustable by shortening/lenghtening the pitch control arms but I'm not at all sure about that.

If I'm wrong here now would be a good time for a pro to step in and straighten us noobs out!!!
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  #18  
Old 02-05-2006, 08:53 AM
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Re: first flight

Quote:
Originally Posted by Nidrah
The trim on your throttle does not adjust head speed in relation to pitch. It actually adds a micro amount of throttle, as if you moved the stick that hair amount. I think your bird is collective pitch, that means pitch is automatically added as you increase throttle, you'll see your swash plate move down as you increase throttle, adding pitch to the blades. I believe this is also adjustable by shortening/lenghtening the pitch control arms but I'm not at all sure about that.
You are 100% correct
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  #19  
Old 02-05-2006, 09:26 AM
johnohue johnohue is offline
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Re: first flight

I believe all of this info to be correct, as well, with my 36. Your explanation and description is also very easy to understand. I look forward to hearing your future input. Thanx-jOhN d.
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  #20  
Old 02-06-2006, 10:49 AM
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Re: first flight

Nidrah, I agree with everything but your trim example. The way I think about trim adjustments relates to driving a car.

If everything is perfect, you could hold the steering wheel straight and your car would go down the road straight. On the Heli, it hovers perfectly still meaning you don't have to hold one stick in any direction to keep it still (theoretically). But say your car/heli wants to pull to the left continously. In your car, you'd hold the steering wheel a little to the right to counteract that. The beauty with the Tx trim tabs on your Heli Tx is you can actually trim to the right so that the stick could remain centered to "trim out" the tendancy for the heli to pull to the left.

Of course, all these tendancies to pull in any direction or spin should be taken care of as much as possible with blade pitch/tracking and adjustments on the helicopter electronics (like on the Blade CP, the Proportion pot).
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  #21  
Old 02-06-2006, 04:44 PM
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Re: first flight

Just remember,, as your battery drops in power your trim will change in flight.. Also remember that the Blade has a very poor gyro and most times it can't keep up with fast changes in throttle.... Same with Honey Bee cp2...
I know this because I own both of them....
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  #22  
Old 02-06-2006, 05:39 PM
Butuz Butuz is offline
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Re: first flight

Quote:
Originally Posted by dct
Just remember,, as your battery drops in power your trim will change in flight.. Also remember that the Blade has a very poor gyro and most times it can't keep up with fast changes in throttle.... Same with Honey Bee cp2...
I know this because I own both of them....
Yeah its always difficult for a newbie that is. Only way around it is to get a good heading hold gyro such as futaba GY240 / GY401. I am only familiar with the futaba ones i am sure there are plenty of others around, but the futaba seem to be held in high regard.

Butuz
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  #23  
Old 02-07-2006, 11:23 PM
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Nidrah Nidrah is offline
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Re: first flight

Hemi, we are both saying the same thing. You can also think of it as adding 'input hold'. It does indeed move your servo a micro amount in order to help balance out stick movement. So, yeah, what you said.

DCT, yup yup ... the less energy ya got to give to the servos the less they tend to do what ya want. The one video on my site "battery going bad" shows the servos freaking out, not enough juice to lift the heli but it sure drove those servos nuts!

Butuz: In due time my man. I won't be going separetes for awhile. An prolly not on this bird. I'll do that when I get a bigger one.
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  #24  
Old 02-08-2006, 08:55 PM
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Re: first flight

I got to where i could Hover as long as i stayed behind the helicopter but when i would turn it around and get it to face me i have alot of problem keeping my directiion.
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