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Century Radikal E640 - Swift 16 NX
› CP won't leave the ground - need help
05-03-2004 03:37 AM  13 years agoPost 1
PsychoZ

rrApprentice

Northern, CA

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I am using the stock motors with a standard birdseed battery pack, I have seperates. I have 5% pitch at half stick with 50% throttle and it only leaves the ground by an inch or two, I even uped the throttle but that did not help, whats up??? Is it a matter of not enough voltage, my batterys are 8.4 volt. Please advise, I need mucho help. And if there is anyone in the Sacramento area that wouldn't mind assisting me in person, I can make it worth your time.

Tea Parties are for little girls with imaginary friends

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05-03-2004 05:54 AM  13 years agoPost 2
pbmax

rrKey Veteran

Olympia, WA - USA

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Your head speed should be much higher, throttle at probably 80% or more. Really, the higher the better, but somewhere above 2000 rpms is best.

pbmax

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05-03-2004 05:02 PM  13 years agoPost 3
PsychoZ

rrApprentice

Northern, CA

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Leslie, what "mah" are your 11.1 batteries, and what brand do you use, or does brand really make a difference


thanks

Tea Parties are for little girls with imaginary friends

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05-03-2004 05:41 PM  13 years agoPost 4
pbmax

rrKey Veteran

Olympia, WA - USA

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I use 1200mah etec 3s packs with my hornet2 and HB. I've had great luck with them so far, but some of the 3d hornet folks claim they start losing charge capacity too soon. Most people seem to like (and recommend) the tanic 1100mah and thunder power 1300mah packs.

I have a 2s TP 1300mah pack and it's quite a bit better than my etec 2s 1200mah packs.

pbmax

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05-03-2004 06:05 PM  13 years agoPost 5
dbursch

rrApprentice

Monterey, CA

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PsychoZ-

You may want to check how close the pinion is to the main gear. My motor was mounted such that it was pretty tight (too close) and I had to back off the motor from the main gear just a bit.

The rotor should turn fairly easily....you should be able to detect binding just by turning the rotor without the battery hooked up.

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05-03-2004 06:09 PM  13 years agoPost 6
PsychoZ

rrApprentice

Northern, CA

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thanks dbursch I will check that out tonight, I do remeber the blades feeling if there was some resistance when I turned the blades by hand, since you are in Montery are you going to the Circumgyration in Fremont on the 13-16

Tea Parties are for little girls with imaginary friends

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05-05-2004 03:15 AM  13 years agoPost 7
PsychoZ

rrApprentice

Northern, CA

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ok now I am begging, if anyone is in the Sacramento area and would like to help a fellow flyer please let me know, I must be doing something wrong, I can not get this bird to leave the ground by more than 4 or 5 inches. I checked the pitch, I have 5% at half stick, I even raised my throttle to 75% and still nothing. come on somebody help out a brother I can make it worth your time.

Tea Parties are for little girls with imaginary friends

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05-05-2004 06:59 PM  13 years agoPost 8
PsychoZ

rrApprentice

Northern, CA

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your gonna love this one, to me it seems backwards but I am going to try it, I just got off the phone with Century or Heli World what ever you want to call them and they told me with the 8.4 volt battery I needed to lower my head speed and increase my pitch to make it fly like it should, which he said it flew to 15' in the air. now I am new but that seems backwards to what I have been told, I though to much pitch and the heli gets all wobly and with not enough head speed it just wouldn't lift. which is right, now I am really confused.

Tea Parties are for little girls with imaginary friends

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05-06-2004 02:06 AM  13 years agoPost 9
hrpull

rrNovice

St. Louis, Missouri

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I'm just wondering if you have a bad 370 motor. I did the break-in in the HB CP instructions on mine (glass of water for 4 minutes). Otherwise yours should be getting off the ground using the Birdseed without anything real fancy on the pitch/throttle curves. Wish I had any better advice....

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05-06-2004 05:17 AM  13 years agoPost 10
PsychoZ

rrApprentice

Northern, CA

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well after tweaking and playing I now have it up to about 3 feet, I increased the throttle and the pitch, opposite of what Century told me to do and hopefully with a little more tweaking I can get it to 6 feet, but I do believe once I have it all trimmed and flying good I will go brushless. other than that the little bird flies great once off the ground, I am starting tro be real happy with my purchase.

Tea Parties are for little girls with imaginary friends

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05-07-2004 08:22 PM  13 years agoPost 11
pjh

rrApprentice

Hampshire England

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pitch versus head speed

head speed gives more response but unless you have some pitch it will NEVER leave the ground. Too low a head speed and it will be hard to control and too much it will be to responsive. you probably need 7 or 8 degrees of pitch for hovering. you need roughly this on a nitro 30 size heli.

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05-07-2004 08:27 PM  13 years agoPost 12
PsychoZ

rrApprentice

Northern, CA

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I hover at 5 degrees with my Raptor, 7 or 8 and I am flying high

Tea Parties are for little girls with imaginary friends

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05-08-2004 07:57 PM  13 years agoPost 13
pjh

rrApprentice

Hampshire England

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psycho z i think you will find that your raptors response is quite quick compared to my concepts as my pitch curve is set up for a docile heli.
My point was really that no matter how fast the head speed is you need lift from the blades and for learning a high head speed low pitch setup will make your hummer very unstable belive me i did this with my concept by accident, not pretty.
mine is totally standard and hovers hands off for 1 or 2 seconds in my dining room. I don't dare leave it longer or the plant,s in there might get a haircut to my wife's dismay(although i think they should be in the garden!). I had a main motor go west and this made the heli unpredictable but took some finding suddenly dropping out of the sky then picking up this also made the tail buck all over the place resulting in numerous crashes. Also the tail motor failing gets scary. all this aside going back to your raptor after the hummer you will see a big improvement in your control.

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Helicopter
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Century Radikal E640 - Swift 16 NX
› CP won't leave the ground - need help
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