I'd say zero pitch at mid stick, then your idle up will match.

just to add one thing dave, 0 pitch at mid stick in IDLE UP. of course, unplug the motors first so you don't kill yourself and the heli

i have checked the pitch and i have gone from 6 to 12 and it still does the same thing. i just tore the heli down to screws and going to build it again maybe i messed something up the first time. the head looked fine.

how do i center the swash plate?

yeah I agree... set the pitch fro 0 degrees at midstick and center the throttle trim too.

if you take a pic of your swash plate I can tell you if you need to recenter it or not... but the basic run down is that you want the swash right in the middle of the main shaft with the head on. When you are in idle up with the motors disconnected, you want the same distance between the collar and the swash at low stick, as between the swash and the rotor hub at full stick.

healifreak has some good videos on how to do this on a 300 sized cnc... I can link you to the video if you want.

http://www.helifreak.com/viewtopic.php?t=17482

Also check out this site for how to rebuild your head and center your swash. It has helped me a lot.
http://www.bladecprepair.com/;)

hear are some of the ideas from
http://www.bladecprepair.com/cause.p...l%20Categories
Good luck.


Cause List
Flight time has decreased considerably.
My flight time has gone down to about 2-4 minutes and will barely hold a hover.
CAUSE: Battery is failing and/or will not hold a full charge.

LIKELIHOOD: 2 on a scale of 1 to 20 where 1 is most likely and 20 is least likely.

REMEDY: Replace battery.

DIFFICULTY: 1 on a scale of 1 to 10 where 10 is most difficult and 1 is easiest.
CAUSE: Main motor is failing. If the motor is very hot after flight, it is failing. Ensure you are using the correct pinion for your setup.

LIKELIHOOD: 2 on a scale of 1 to 20 where 1 is most likely and 20 is least likely.

REMEDY: Replace the Main Motor.

DIFFICULTY: 5 on a scale of 1 to 10 where 10 is most difficult and 1 is easiest.
CAUSE: Tail motor(s) is failing causing excessive amp draw.

LIKELIHOOD: 3 on a scale of 1 to 20 where 1 is most likely and 20 is least likely.

REMEDY: Replace the Tail Motor.

DIFFICULTY: 4 on a scale of 1 to 10 where 10 is most difficult and 1 is easiest.
CAUSE: Main Motor to Main Gear mesh is too tight.

LIKELIHOOD: 12 on a scale of 1 to 20 where 1 is most likely and 20 is least likely.

REMEDY: Adjust Main Motor to Main Gear mesh.

DIFFICULTY: 3 on a scale of 1 to 10 where 10 is most difficult and 1 is easiest.

Oh... one other thing I was thinking is maybe your retaining collar on the mainshaft could be too tight. You want it tight enough that it doesn't really wobble up and down, but not so tight that it binds.

yeah, that's a very good idea bladecprepair... almost forgot about that =P

http://www.bladecprepair.com/man_mr_...tml#adjustment

thanks for all the help i will give it all a try in the am. and let you all know what happens
Thanks again you guys rock

Tom

ok i recentered my swashplate and set the pitch to 10* and it still is doing the same thing oiled the shaft made sure it is not dinding .do you think it could be the daul tail motors that maybe one of them is going junk there new but anything could happen

yeah, I guess it could be. Just unhook one of the motors and take it off, and just try the other motor alone and see if that does anything.

One other thing... what type of blades are you using, and what pinion?

i am running plasti blades with a 9t pinion with a 800mah 11.1v pack

hrm... that is what I was running (and super skids), and I didn't realize what a load that was on the motor until I swapped it out for some lighter blades. That probably wont fix your problem, but it's something to think about. I'm going to be switching to a 8T pinion... I just picked it up today.

I wonder what your battery resistance is? If you have a way to measure that....

Did you say that your batteries work in your friends chopper?

I dunno... there just aren't alot of answers... seems like we've covered just about anything that could be wrong with the heli... so either we've skipped over something, or who knows what the problem is =(

did you find anything out with the dual tail?

its strange i even took one of the motors off no diff except it flys alot better with the daul motors then one.
i am going to replace the main motor and see what happens lets hope for the best or t-rex here i come

MRASMM,

Ok, now i am confused. I was going to buy the plasti-blades because they are virtually indestructable, but you said that it puts a lot of extra stress on the motors. I don't know what to pic, balsa or plastic..... PLEASE HELP[:@]

Lilpilot13 go with the plasti blades there the bomb if i had balsa blade on mine with all the stuff that is going on with mine i would be in the poor house the plasti blades hold up great. then when you can fly better and the crashes are fewwer then you can go to the carbon blade imo

thanks, but, will i start crashing again because i am learning nose in hover now, first im learning tail in? i can hover tail in very good now, but i just ticked the blades on a cardboard box and some of the covering came off. now it is making a high pi9tched squeling and is less stable. should i just buy new blades now?[:-]

mrasmm ,
why a 8T pinion? that means increasing the motor speed while decreasing the headspeed. With heavier blades (Plastic, ect) wouldn't you actually want to increase headspeed.......... ie: 10 or 11 tooth pinion?
That is assuming you are running Plastic or Fiber blades.......... Am I confused and missed a point somewhere? You have always been a fact and informative source......... I am actually afraid to dispute your observations............ don't shoot me too hard......TY



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Of all the things I ever lost.............................................. .......... I miss my mind the most!

lol, you make me laugh Arrow. Actually of all the people on the board that look to find out why things work, you've got to be one of the most mild mannered and willing to accept when someone else might know more about the situation =) I think that is a great attitude. People need to know why things work =)

I'll try to explain the 8T concept and see if it makes sense, and if it doesn't then I'll give it another go ahead. The 9T if you just look at gear ratios will give you a higher head speed because everytime the motor goes around it moves the main gear 9 teeth, where the 8T only moves it 8 teeth. The comparison comes in the strength of the motor. The stock motor only has a limited amount of strength, so when you put the 9T on and 18g worth of blades it really loads the motor and slows it down. When you move down to the 8T it theoretically slows the head speed, but you have more power because the motor is spinning faster. You will have the same amount of torque on both, but horsepower is a combination of torque and speed, so the faster moving motor will have more horsepower even though the torque is the same on both the 8T and the 9T.

I like anaologies so I'll try to explain it with one of those. If you are pedaling a bike and you are in a high gear it will be very hard for you to push the pedals and you'll get tired quickly, although theoretically you can go faster in a harder gear. If you gear down a bit you'll have more power for faster acceleration and you wont tire as easy, although you wont have as high of a theoretical top speed. In the real world though you might have a higher top speed because you are more in your "power curve".

This is what we are trying to do with the motor. The easiest way to tell that it is not in it's power curve is if it has excessive heating, like the 9T for the flat bottom plasti blades. I just got an 8T today that I am going to slap on and I'll let you know how that turns out =) Hopefully it wont work the motor quite so hard, which should mean more punch out power and longer flight times due to less power consumption.

Hopefully that makes sense =)

If not let me know and I'll try a different way to explain it.

Plasti blades are fairly tough, and are a good option, especially with some mods. If you go for the flat bottoms, I would move down to an 8T pinion, and i have 2 heatsinks on my setup. You can stick with the 9T if you go with the syms. I am also going to be making holes in the canopy soon for better airflow and less heat buildup in the motor. I would also do choppersrule's paper clip mod, and if you can the fuse mod on the main rotor (the tail is good too). If you are still needing guidance, I have a big writeup I did comparing the two. If there is interest I will post it here, or I can e-mail it out to anyone who wants it =)

I posted this over in the regular CP thread, but I thought it was relevent over here too.

I was pointed to some $3.75 main blades. I couldn't resist the price, so I had to try them out. Read about it here, and as always if you have any q's let me know.

One of these days soon I'll see if I can get a vid of them or something with my limited flight abilities =P

I've gota get the pics posted for that brushless mod first =P jeeze it has taken me a long time to get to that

http://www.rcuniverse.com/forum/fb.asp?m=5672992

i got a blade cp pro, and my motor is getting extreamly hot, evin with 2 heat sinks!! i thingk it's my battery wharing out, becaus i have flown about 1 hour a day since christmas, i was wondering if enyone had a secound opinion before i drop 30 bucks on a battert[:-] PLEASE reply back. thanks

That sounds like a real classic case of a worn out motor. If you have done 1 hour (4 flights?) per day since christmas, you're well above the trend. Normally motors only last 20 flight hours =). If you have done 4 flights per day since christmas, then your battery is probably also close to going out. They only last probably 200-300 cycles for the average user.

ok but i have tryed a brand new motor and still the same problem

im online right now!!!(12:25 AM) ARIZONA TIME

you might try breaking it in, although that is probably not your problem... I have a good guide in the electric heli's forum that is a sticky...

what kind of charger do you have? Does it measure mAh discharged and put back into the battery?

How many flights do you have on this heli then? about 350 flights?

Do you have more than 1 battery?