RunRyder RC
 2  Topic Subscribe
WATCH
 1 page 798 views
Scorpion Power Scorpion Power
Helicopter
e-
Blade
Other › Weird trouble in BCPP 3in1!!!!!!!!
09-14-2007 02:21 PM  10 years agoPost 1
Mashiur Rahman

rrApprentice

Toronto,Ontario,Cana​da

My Posts: All  Forum  Topic

This is a weird trouble. After 3/4 min continous hover I found I have to put some rudder input to keep my tail in position. Although it can't be kept by rudder input but shouln't be like that.
Believe it or not just after lipo hook up, first 3/4 min I don't have to touch the rudder either unless want to change direction. I don't have HH gyro though.My batt gives me kinda like 14/15 min flight time. So after first 3/4 min the more times passes the tail needs more rudder input.
Weird!!I also discovered during that whole flight time if I land & unhook batt & hook up again it does the same thing I describe above. I replaced my 3in1 unit with brand new one but the same thing.The other is my heli is well trimmed.Gyro is in high gain,tail motor is new,DSM radio. I think gyro gets little less sensetive over the time of the flight.So fist minutes it works really good like HH.
Anyone knows or facing this trouble?

All's well that ends well

PM  EMAIL  Attn:RR  Quote
09-14-2007 05:27 PM  10 years agoPost 2
w8qz

rrVeteran

Grand Rapids, MI -​USA

My Posts: All  Forum  Topic

This is normal for the BCP, without the heading-hold gyro. (I've never tried any other on the CP, so I can't compare to that - only a Futaba 401 on a 30-size nitro). As the battery voltage decreases, the main motor slows slightly, and the pitch on the main blades must increase slightly to compensate. The increased main blade pitch requires more anti-torque from the tail rotor; however, the trim is set at only one particular point, while the other factors vary with battery.
The NiMh pack voltage changes more rapidly than a 3-cell LiPo, so the 'tail going out of trim' effect is much more pronounced.
I've found, with lots of flying time practice, that I 'trim' by where you hold the sticks - without consciously thinking about it. It actually takes some extra effort to decide which way, and how much, to adjust trims, if needed. However, the tail going out of trim is very confusing when first learning. If / when you fly in wind, you will, with practice, find yourself 'trimming by stick position' to compensate for the wind. In general, it seems a heli is never 'trimmed out' in the sense of a fixed-wing plane.

"The helicopter is much easier to design than the aeroplane, but is worthless when done."

PM  EMAIL  GALLERY  Attn:RR  Quote
09-14-2007 10:28 PM  10 years agoPost 3
jimras

rrNovice

Wisconsin, United​States

My Posts: All  Forum  Topic

I fly a blade cp pro and I have to adjust the trims just a bit
as the pack works down in voltage.

I start out OK and have to add a few clicks of right tail (rudder) as the flight progresses but it's not that big a deal to adjust.

I just put the trim back to center for the next pack and fly away!!

PM  EMAIL  Attn:RR  Quote
09-15-2007 02:02 AM  10 years agoPost 4
Mashiur Rahman

rrApprentice

Toronto,Ontario,Cana​da

My Posts: All  Forum  Topic

HH even can't keep the tail ok....

w8qz,
U could be right though 85% I believe, rest I got to have a lot of test fly with different kinda batt that used in flights.
However what does that HH do? Maximum try heart & soul by ruining tail motor or even can't keep the tail straight last time of the flight battery.

All's well that ends well

PM  EMAIL  Attn:RR  Quote
09-15-2007 03:16 PM  10 years agoPost 5
stickyfox

rrKey Veteran

Rochester, NY - US

My Posts: All  Forum  Topic

The transistors in the 3/1 get very hot. They can warm up the gyro and cause it to drift. This is especially noticeable in cold weather.

I usually fly my BCP very aggressively for 2-3 minutes, then land and reset the 3/1 (disconnect the battery in other words). This calibrates the gyro for "warmed-up" mode and makes it behave a little better for subsequent flights.

You can also keep your BCP on the floor of the car on the way to the field and crank the heat up for the drive.

-fox

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
09-16-2007 10:46 PM  10 years agoPost 6
Mashiur Rahman

rrApprentice

Toronto,Ontario,Cana​da

My Posts: All  Forum  Topic

BCPP tail trouble will not end unless get rid​off it.

Whatever the reason is,it's not possible to get rid off that problem.This tail problem will keep going on.That's why I will always advice people don't go for motor drive tail.Motor wearing out& this tail drifting will happened what ever u try to stop.
Now I'm waiting for October to get rid off this crap BCPP replaced by Trex450.No more tail motor issue or tail drifting due to batt voltage during flight.

All's well that ends well

PM  EMAIL  Attn:RR  Quote
09-18-2007 02:42 PM  10 years agoPost 7
Mashiur Rahman

rrApprentice

Toronto,Ontario,Cana​da

My Posts: All  Forum  Topic

Electric isn't fact at all.

The electric powered heli doesn't matter.Poeple r happy with electric ones. As in Trex or this kinda heli where tail is run by belt or shaft from the main gear wont cause that trouble.However RPM the main motor spins in, tail will do the same as it's mechanically connected.And ur HH gyro is placed far from heat source so don't have any heat up issue either.The tail pitch servo consumes barely a little current won't cause voltage/amp issue as tail motor does.That's why I advice people always get rid off motor drive tail heli.

All's well that ends well

PM  EMAIL  Attn:RR  Quote
09-22-2007 03:10 AM  10 years agoPost 8
Big Daddies Heli's

rrApprentice

Parts Unknown to the​X Wife :)

My Posts: All  Forum  Topic

Tail drift

I put a G90 on my CPP and it's ROCK Solid w/ Remote gain set at the 2 oclock position on the Tx... I mean ROCK Solid .......fast forward flight.. turns..Nose in Etc..

For the entire Pack... about 10 min..

I'm installing a DMX Gyro / 6 Channel rec/3n1..and ..A Mighty FAT $109.00 All ALUMINUM Head on my CP Tonight Whoooooooooo......

PM  EMAIL  GALLERY  Attn:RR  Quote
09-22-2007 12:37 PM  10 years agoPost 9
dignlivn

rrApprentice

Cullowhee,NC.

My Posts: All  Forum  Topic

gpclassic

Is right. Put a G90 on it, trim
it out properly and fly. Fly the
Tail also. JMO

Bob

dignlivn

PM  EMAIL  GALLERY  Attn:RR  Quote
09-22-2007 12:37 PM  10 years agoPost 10
stickyfox

rrKey Veteran

Rochester, NY - US

My Posts: All  Forum  Topic

I can fly my BCP for over 20 minutes with flat blades and a 3-cell 800 mAH Lipo, and still be over 9.5V at landing. The trick is getting the headspeed and pitch dialed in.

There is a difference between a direct-drive tail and a belt-drive but it's not fair to say that the BCP and its ilk are inferior. The simple explanation is that to correct for yaw, the tail motor has to speed up or slow down, and this takes time to happen, much more time than a trex tail servo needs to move a few degrees. It's a tiny little motor.

Add to this the fact that a BCP doesn't come with a PI (or "heading-lock" gyro, and it can't respond correctly to the voltage drop or the above delay in the system. This is why you don't have that out-of-the-box, rock-solid tail control that you get with a belt-drive heli.

If you get rid of the gears and put a new gyro, a brushless motor and a good controller on there, you will be amazed at how stable the tail can be. But for the money and weight you're probably better off with a belt conversion.

I personally like the sloppy tail on the BCP. It makes flying inverted unnecessarily challenging, but it is kind of cool to dial in the left stick and fly with one hand.

-fox

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
10-06-2007 10:05 PM  10 years agoPost 11
Mashiur Rahman

rrApprentice

Toronto,Ontario,Cana​da

My Posts: All  Forum  Topic

This wierd trouble will keep going so I finally bought a Trex450 SA with logitech gyro. Just get rid of that crap.

All's well that ends well

PM  EMAIL  Attn:RR  Quote
WATCH
 1 page 798 views
Scorpion Power Scorpion Power
Helicopter
e-
Blade
Other › Weird trouble in BCPP 3in1!!!!!!!!
 Print TOPIC  Make Suggestion 

 2  Topic Subscribe

Wednesday, November 22 - 2:49 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online