2 cell Lipoly on Blade Cp

2 cell Lipoly on Blade Cp
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All Forums >> RC Helicopters >> Electric RC Helis >> 2 cell Lipoly on Blade Cp

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2 cell Lipoly on Blade Cp - 12/29/2005 10:28:08 PM

accaptain

Posts: 101
Joined: 1/22/2004
From: Memphis, TN, USA
Status: offline

Just wondering if I use a2 cell lipoly is it that important to switch to a 11 tooth gear on main motor? I do know that If I go to a 3cell I would have to switch to 9and I understand switching then but how much of a difference will I be able to tell with 2 cell and 10 tooth (stock gear on main motor?

Reason I'm asking is my Nimh is dead I believe. I bought this heli on Monday and I did as the manual said and drained the nimh down untill it would not hover. I then charged it for two hours and it worked fine the next day when I flew it. I did not drain it all the way that day and went to recharge it yesterday. I think I overcharged it because the pack was hot and I did not realize, I had it on charge for 2 hours again even though it was not fully drained. Went to fly it today and it would not climb into a hover more than 4 foot of the ground then it went dead really quickly. I put it back on the charger and after an hour it was warm to the touch so I tried to fly it again and this time it would not spin up fast enough to get 2 foot off the ground. I just want to go with my tried and true lipoly's as I fly on my foamies! Charge time is about 20 minutes versus the 2 hours plus better batteries.

Thanks,
Accaptain

Post #: 1

RE: 2 cell Lipoly on Blade Cp - 12/29/2005 11:16:13 PM

dsltek432

Posts: 191
Joined: 6/28/2005
From: Brandon, MS, USA
Status: offline

You can try it. Not sure how much head speed you will be giving up though.If it don't work well the motor w/ 11 tooth pinion is only like $10 isn't it?

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(in reply to accaptain)

Post #: 2

RE: 2 cell Lipoly on Blade Cp - 12/29/2005 11:33:07 PM

HeliHacker

Posts: 83
Joined: 4/29/2005
From: Fort Wayne, IN, USA
Status: offline

2 cell Lipo should be about the same voltage as the stock nimh. I think the two cell Lipo should be lighter than the stock battery as well. Try it and let us know.

(in reply to dsltek432)

Post #: 3

RE: 2 cell Lipoly on Blade Cp - 12/30/2005 2:14:12 AM

accaptain

Posts: 101
Joined: 1/22/2004
From: Memphis, TN, USA
Status: offline

Nope, the 2 cell 800mah TP battery would barely lift it off the ground (fully charged) with the 10 tooth geared motor. I tired the original Nimh pack again and it would only get about 5 foot in the air at full throttle also Fully charged. Maybe the pitch is off or something.

(in reply to HeliHacker)

Post #: 4

RE: 2 cell Lipoly on Blade Cp - 12/30/2005 3:02:32 AM

bdavison

Posts: 3350
Joined: 8/23/2004
From: Warner Robins, GA, USA
Status: offline

Dont waste your time with a 2cell lipo. It wont work...period.

If it actually gets off the ground, it wont fly very well.

And a 2 cell lipo is NOT the same as the NiMH battery the Blade comes with.

A 2 cell lipo is only 7.4V (max 8.41V)

The stock battery is 9.6V

So your actually losing power by putting a 2cell lipo on it.

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(in reply to accaptain)

Post #: 5

RE: 2 cell Lipoly on Blade Cp - 12/30/2005 10:23:52 AM

HeliHacker

Posts: 83
Joined: 4/29/2005
From: Fort Wayne, IN, USA
Status: offline

Well you gave it a try. Don't think it is worth trying different pinions on the main. But when you go to 11.1 v get your wallet out for tail motors.

(in reply to bdavison)

Post #: 6

RE: 2 cell Lipoly on Blade Cp - 12/30/2005 11:22:49 AM

Lammy1000

Posts: 128
Joined: 12/14/2004
From: SCOTIA, NY, USA
Status: offline

quote:

ORIGINAL: HeliHacker

Well you gave it a try. Don't think it is worth trying different pinions on the main. But when you go to 11.1 v get your wallet out for tail motors.

Actually, You need not get your wallet out for tail motors. Anyone in the beginner/novice range should consider the 8 tooth main motor. The heli flys great and I got 11.1 hours on my original tail motor. My current 8t motor has over 12 hours on it. Of course, a 3s lipo is required.

(in reply to HeliHacker)

Post #: 7

RE: 2 cell Lipoly on Blade Cp - 12/30/2005 11:44:03 AM

HeliHacker

Posts: 83
Joined: 4/29/2005
From: Fort Wayne, IN, USA
Status: offline

Highly disagree. If you check one of the most common threads that has gone back for over 6 months since Blades came out it has been tail motors degrading after a Lipo upgrade. There have been some who seem to have luck and get decent life such as Lammy1000, but there have been many who wonder why they last 1 hour to 1 day. Fact is they are 7.1 v motors in an application that goes over 12 v. It started another whole approach of looking at brushless substitutions, high frequency controllers, filters, diodes, resistors, you name it. Sooner or later it is going to happen.
The motors are not robust, it is the little brush "springs" that loose their spring characteristic due to heat in conjunction with dust from the brushes that leads to the motors degrading.

So, maybe accaptain will see decent life after the Lipo upgrade, maybe he won't. I have had them last a week, and I have had them last a few hours. I fly my Trex and Maixir now, not my Blade. Just be prepared.

(in reply to Lammy1000)

Post #: 8

RE: 2 cell Lipoly on Blade Cp - 12/30/2005 12:05:31 PM

Lammy1000

Posts: 128
Joined: 12/14/2004
From: SCOTIA, NY, USA
Status: offline

The 8t reduces head speed, yet still maintains enough stability for adequate stabilization for all flying except aggressive or 3d flight. With this reduced headspeed is reduced heat in the motors and, generally, increased service life for nearly all parts, including the exspensive 4 in 1. Check out the video recently posted in the "main" Blade CP forum by Charua - 8t motor. I have 14 hours of flight time and only blades and main shaft needed replacement. I have all the head parts on hand when it finally gets sloppy enough to need parts replacement, yet with frequent lubing and the 8t it just keeps flyin'. Life is good.

(in reply to HeliHacker)

Post #: 9

RE: 2 cell Lipoly on Blade Cp - 12/30/2005 12:13:18 PM

HeliHacker

Posts: 83
Joined: 4/29/2005
From: Fort Wayne, IN, USA
Status: offline

We are not talking about the main motor, its the tail motor where the issue lies. I changed to 8t almost as soon as I bought the Blade. I have never had to change the main rotor motor. It has worked fine. I estimate that I changed upwards of 10 tail motors before I quit flying my Blade. I went to helis w/o tail motors.

(in reply to Lammy1000)

Post #: 10

RE: 2 cell Lipoly on Blade Cp - 12/30/2005 2:25:11 PM

HeliHacker

Posts: 83
Joined: 4/29/2005
From: Fort Wayne, IN, USA
Status: offline

On 2 cell Lipos this is a quote from the Horizon Hobby bulletin website

http://www.horizonhobby.com/Shop/ByCategory/Product/Bulletin.aspx?ProdID=EFLH1100)

EFLH1110D - 370 Main Motor with 11-Tooth Pinion:

For use with 2-cell Li-Po packs and flat bottom main blades for hovering and sport flying. We suggest packs from 860–1320mAh. DO NOT USE THIS MOTOR AND 11-TOOTH PINION WITH 3-CELL LI-PO PACKS AS IT WILL DRAW EXCESSIVE CURRENT RESULTING IN SHORT MOTOR LIFE, EXCESSIVE RF NOISE POTENTIALLY CAUSING RADIO “GLITCHES” AND DAMAGE TO THE 4-IN-1 ON BRIEF BLADE STRIKES OR EVEN DURING FLIGHT. Use of a heat sink is optional (EFLH1132), though it can help to improve duration and motor life.

Also, we find it is best to allow the main motor to cool to near ambient temperature between flights.

(in reply to HeliHacker)

Post #: 11

RE: 2 cell Lipoly on Blade Cp - 12/30/2005 3:04:51 PM

1LO64

Posts: 270
Joined: 2/6/2005
From: TRF, MN, USA
Status: offline

quote:

ORIGINAL: HeliHacker

On 2 cell Lipos this is a quote from the Horizon Hobby bulletin website http://www.horizonhobby.com/Shop/ByCategory/Product/Bulletin.aspx?ProdID=EFLH1100)

EFLH1110D - 370 Main Motor with 11-Tooth Pinion:

For use with 2-cell Li-Po packs and flat bottom main blades for hovering and sport flying. We suggest packs from 860–1320mAh. DO NOT USE THIS MOTOR AND 11-TOOTH PINION WITH 3-CELL LI-PO PACKS AS IT WILL DRAW EXCESSIVE CURRENT RESULTING IN SHORT MOTOR LIFE, EXCESSIVE RF NOISE POTENTIALLY CAUSING RADIO “GLITCHES” AND DAMAGE TO THE 4-IN-1 ON BRIEF BLADE STRIKES OR EVEN DURING FLIGHT. Use of a heat sink is optional (EFLH1132), though it can help to improve duration and motor life.

Also, we find it is best to allow the main motor to cool to near ambient temperature between flights.

Yes, I've ran that exact setup with no problems and 15 minute flight times. The only thing I didn't like was a little slower headspeed.

(in reply to HeliHacker)

Post #: 12

RE: 2 cell Lipoly on Blade Cp - 12/30/2005 3:23:07 PM

HeliHacker

Posts: 83
Joined: 4/29/2005
From: Fort Wayne, IN, USA
Status: offline

You can probably increase your headspeed by changing your pitch.

(in reply to 1LO64)

Post #: 13

RE: 2 cell Lipoly on Blade Cp - 12/30/2005 4:00:20 PM

accaptain

Posts: 101
Joined: 1/22/2004
From: Memphis, TN, USA
Status: offline

Well I think I am going to go with the aerobatic kit anyhow. I went ahead and bought the tail motor heatsink on Monday when I bought the chopper. I figured since I read so much about tail motors going out that using the heatsink right off the bat would help. I also put some Artic silver compound on it as I use on my computer cpu heatsink. Should I just forget the kit and buy the main motor heat sink, blades and 8 tooth motor seperate since I already have the tailmotor heatsink?

I did hit the main blades in the grass and tore some covering off the end of both blades. I throttl