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Li Po Batteries

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skyhawk newbie:
I'm new here and new to flying powered gliders ,
so if this is in the wrong section sorry..

What I have is a ...4Ch TW-742  SkyHawk  Aerobatic Glider...
has  9.6v 1100mAh battery.

Now I wana Mod this glider just a bit...  :lol:
By fitting a brushlees motor (TowerPro BM2408-21T + 18A ESC combo)
with 8x4 prop...
Now I've been reading ( http://www.dmitrynizh.com/tw742.htm )
 and to get the best out of a brushlees motor, I need to get Li-Po Batteries....Of which I know nothing about.....
So what I wana know is whats the best size Li-Po's / charger
and any other info for a newbie...

Regards Sean

Aidan:
Sean,

There's any number of power systems you could put in a plane like that. To choose a suitable one there's a few more pieces of info needed.

What's your flying experience and how do you want to fly the plane?
As a powered glider (power up and spend most of your time with the motor off), as a basic trainer (flying around at moderate speed with occasional mild aerobatics), sport plane (a little of everything including some speed and aerobatics) or something else.

How much do you want to spend?
There is very cheap equipment around now which typically perform pretty well but if you're able to spend a bit more it does open up more options.

The critical thing with electric flight is that the batteries, motor and prop are all interlinked. If any of these 3 components aren't suited to the others for that application the performance will be disappointing.

Aidan

Happy Days:
Here’s a thought, Skyhawk. :?:  

If you have already brought a TW-742, (and I susspect you have :) ) don’t fit any motor at all! :shock:  Just fly it as a fully fledged slope soarer. :clap:   All the time the wind is hitting  the side of the slope you will have FREE lift.  Fly all day if you want to! 8)  

(By not carrying the weight of a big flight battery the plane is lighter and will be easier to keep in the air. :D )
Most of the slope soarers I know, including myself, don’t use power systems in our gliders. We let the wind do the work!

Keith

skyhawk newbie:
Thanks for replys...

Yeah ..I've allready got one ,,got it last week.....

then Ordered another 2 , So I've got 3 TW-742 SkyHawks ,,,,
( Cheaper to buy the whole glider then the spares )

Glider 1
This is my Trainer glider,as I've allready crashed it....

Glider 2
Christ. . I'm defo keeping one  as a slope soarer

Glider 3 this will be my fully Moded Glider.....
 I want as a sport plane (a little of everything including some speed and aerobatics) Thanks Aidan.....
 Ordered from Hobby King...
 TowerPro BM2408-21T + 18A ESC combo with 8x4 prop...
 But I donn't know what Battery works best for this Combo

Happy Days:
Ahrrrrreee. Now we understand a little bit more. :wink:

The battery you want is a 1100mAh 3cell (shown as 3S in the adverts) Li-po with a discharge rate of around 20C (20 times it’s capacity)

So,…..if you look in the adverts for a Li-po batteries = 1100mAh 3S 20C will give you about the same   powered flight time as the original Metal-Hydride battery set up the plane originally had.

If you wanted to use the propeller for longer periods you could get a bigger 3cell li-po, may be a 1500mAh. But you must ensure that whichever size battery you get it will physically fit into the plane. The shops selling them will normally tell you the physical size of each battery.

K.

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