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08-07-2007 12:54 AM  10 years agoPost 1
J Anderson

rrApprentice

Forsyth, GA USA

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Hi all. My name is John, I live in GA. Just recently purchased a EP8 V2.

So far I have a DX7 radio. Jr G500T gyro, Hacker A30 10L motor.
I'm running a 19t pinon with a 4s 2100mah 15c battery. Just wondering if this combo is ok. Or do I need a different pinon.

THANKS John.

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08-07-2007 03:12 AM  10 years agoPost 2
jimboflies

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Beaumont, Texas;

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If the EP8 is a Sportsman version , I would not use any pinion bigger than a 17tooth , with your set-up it will give you a head speed of around 2500RPMs , the MAX for a Sportsman version!
I have seen the SP blow apart with a HS over 2500RPMs , main shaft failure !
OH , and welcome to Quick of Japan!!

EP8 EX twinring frame
Quick of Japan
EP8v2 EX
EP9

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08-07-2007 09:05 AM  10 years agoPost 3
ammo

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Singapore

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I would strongly recommend going for higher discharge capable batteries in the range of 20C and onwards.
Other than that, once everything is setup nicely, you'll love the heli

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08-07-2007 11:38 AM  10 years agoPost 4
J Anderson

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Forsyth, GA USA

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Well Luckly I have a 17 So basicly the smaller the pinon the lower the head speed?. Does it really matter that much, since you can adjust the throdle curves in the radio. Although that might be too complicated?

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08-07-2007 02:14 PM  10 years agoPost 5
gorn

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Western Australia

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Smaller pinion does equal lower head speed.
It does matter, as not only does your head speed get lower, but it also draws less amps from your battery.
Important seeing as you only have 15c packs.
Ammo is right, get some 20c packs ASAP.
Your throttle curves should be linear in Normal mode ie: 0 25 50 75 100
In idle up you should be 100 100 95 100 100
A brushless esc is at its most efficient at its highest settings, the lower you go the less efficient it gets.
What this does is it generates heat, and lots of it.
Thats how it burns off excess voltage rather than passing it to the motor for more speed.
Is this your first heli?

For the love of the hobby

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08-07-2007 02:19 PM  10 years agoPost 6
Heli_J

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Kannapolis, NC - USA

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iv run exact same motor at 13t and now im on 15t...17t would be "best" but im just a lazy flyer without 3d stuff (fingers aint that good yet)....

look in my gallery for 13 and 15t curves....

Welcome!!!!!!!!!!!!!!!!!!

julian

---> Blade CP, T-Rex, MX-400, QJ-8, QJ-16 No Gass, only Electric!

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08-07-2007 08:47 PM  10 years agoPost 7
J Anderson

rrApprentice

Forsyth, GA USA

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I found some 25C Flight Power's. They will work?

I'm pretty new to the hobby of Heli's. This is my second heli. he first was a AXE CP.

Are there some good Base-Line (BEGINNER) settings for this heli,and the radio. As far as pitch etc...... are concerned.

Thanks
John.

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08-07-2007 11:51 PM  10 years agoPost 8
jimboflies

rrElite Veteran

Beaumont, Texas;

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Hi J-anderson , is your EP8 the Sportsman or the EXpert

EP8 EX twinring frame
Quick of Japan
EP8v2 EX
EP9

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08-07-2007 11:53 PM  10 years agoPost 9
J Anderson

rrApprentice

Forsyth, GA USA

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Sportsman.

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08-08-2007 03:47 AM  10 years agoPost 10
gorn

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Western Australia

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The Flightpowers are exactly what I would use.
Although for a beginner there is one other battery I would consider.
Check out Airthunder batteries. They are rated to 25c, they are cheaper than FP, but their real clame to fame is that they can safely be discharged to 2volts per cell. All other lipos get damaged under 3v per cell, but not these.
There is a lot of talk about them in the battery section.
The advantage here for a beginner especially, is that you will not have to time your flights, as the heli will not fly at all by the time volts get that low.
So basically fly until power starts to drop off. More flight time for you, which is very important at this stage, and they are designed and warrantied to do it as well.
Good luck

For the love of the hobby

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08-08-2007 11:50 AM  10 years agoPost 11
J Anderson

rrApprentice

Forsyth, GA USA

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Ordered one of the Air Thunder's this morning!

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08-08-2007 02:52 PM  10 years agoPost 12
gorn

rrElite Veteran

Western Australia

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Good job
You realise that you actually need 2 3s packs??
Otherwise the amp draw will be through the roof.

Simple way to look at it is like this: less cells= less voltage=less efficient for a given head speed, which in turn draws more amps from a battery pack.
The C rating of a pack is basically pack capacity ie: 2200x C rating, like this 2200x 0.025=55amps.
As the pack capacity increases the amount of amps that you can draw also increases.
So if you take 2 3s 2200 packs, wire them in parrallel (do a search, you will find pics of how to do this, its easy), they then become like 1 3s 4400 pack.
Do your equation again 4400x 0.025=110amps.
This is more like it.
Your maybe thinking that no way do I need that, BUT youd be right lol.
What it does though, is lessen the stress on the battery by a large margin. This generates way less heat in the batteries, making them last longer and safer.

If you already knew all that, then just ignore it lol.
But if you didnt already know it, then I do hope I made sense to you.
If not, then feel free to ask away

The higher the voltage of a pack, the more efficient it becomes, and draws less amps. Just the way it works.
Thats why a Trex 600 on a 6s pack will always run the packs very hot.
Serious guys are running 8-10s. More efficient, more power, less heat.

Cheers

For the love of the hobby

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