Very stable flight. And congrats too for stable flight without guide. Now just make an pusher just to save on prop using twin boom, same wing assembly.
Just have to replace fuselage and rudder,elevator assembly.
An spreadsheet is given for easy calculation of battery placing.
Use 48" wingspan sheet and enter your data. You can check fuselage data and CG.
If any help I will be lucky. Just have to add weight in wt. with coro.

https://docs.google.com/open?id=0BwGryIQR1d40VjAyanhkRTcxVUE

Hope, with this trainer, you will not need to be sorry for prop breakage.
Happy landing.

@kalyan sir I really enjoyed flying yesterday with my trainer for about 1 hour...
used 3 lipos for flying..
2200mah
900mah
1500mah
all balanced correctly and the flying vid here is with 2200mah battery...
and broken one prop in the last landing...
I was really planning for a pusher next as you said
I think your model will be perfect for me(was planning for a blixer model earlier)
thanks for your plan sir... now bit engaged with my ornithopter.. soon start build after that..

Excellent Arun! Many congratulations 

The model looks very stable and an excellent trainer 

thanks a lot sanjay sir...

Hi Arun,

Last week i order most electronics from HK. looks like it may take week or two...
Meantime got the 6ch Transmitter and waiting for the Sim to do some practice 

I was had a close look at your model and connections and just wanted to know that the connections between ESC and motor cable colours are interchanged. (Red to yellow / yellow to Red) Any specific reason ?

the image file name is DSC_4313.jpg

Please do let me know

thanks
cheluvaraj

there is no need to look for the colour codes on the motor esc connection do it in any way... if the motor spins the opposite direction leave the middle one and interchange the other two wires thats it..
some esc will be having same colour wires from it.. so dont be get confused..

anyway which motor you are planning to use...?

here it is
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=18969

What do you think?

Fine but must be overpowered.. no need of this much high W motor.. 
http://www.hobbyking.com/hobbyking/store/__21974__Turnigy_DST_1200_Brushless_Bell_Motor_1200kv.html this is far enough for this setup.. anyway no probs.. update your build log without fail...
 

i didn't give much importance to weight, was more looking at "the Max thrust: 1130g "

Fine go ahead.. anywat it is going to fly for sure.. 

Hi Arun,

Yesterday got the package from HK 

The motor which ordered (http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=18969) and it has a instruction sheet and they mention that it has to be used with 40A ESC. Waht actuall i bought is 20A ESC. i dont think i can use 20A for this motor, but still i thought of asking you and other experts whether its safe to use 20A ESC for above mentioned motor?

Also got these props
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=20862
But it has very small hole (2mm dia), not sure how i can use them.

Please let me know your thoughts, i also request others to give your feedback. 

Thanks
Cheluvaraj

Maybe many will disagree with me, but I feel a little extra power is good, certainly better than underpowered. You don't have to run at full throttle, get a better life out of your motor/engine

What i understand is that motor needs 40A ESC but 20A can be used right?
Is that means we are using half of the motor power at full throttle ?

You might want to understand it this way -

When an engine runs, it drives the propeller and the propeller cuts through air, the power (dum) to cut through air is being provided by the engine. The engine is your source of energy. When the prop size increases, more power is required because you are cutting through more air, the same engine will run the propeller but run it at a lesser speed (r.p.m). Theoretically, if you keep on increasing the propeller size, there will be a time when the engine will turn slowly, not delivering enough for flying worthiness

With electrics, its slightly different, the motor is not the source of energy, its the battery that's the source of energy and the energy comes enroute the ESC. The motor in any case *will* drive the prop. So if you increase the prop size, the motor will still turn but will draw more current from the ESC. The 20A is the max rating that the ESC can deliver, so in your setup if the motor is pulling in less than equal to 20A at full throttle all is well, but let us say based on your prop size the motor pulls in somewhat higher than 20A, your esc will not be able to live up and poof! Some damage may happen to the battery also if it's incapable of delivering the required power. Now if your spec says it needs a 40A ESC so it is advisable to go with a 40A ESC

Hope that helps.

I wouldn't do that. Use a 40/50/60 A ESC! Not 20A

Girish and Sanjay, Thanks a lot for detailed response. its clear to me now.

Cheluvaraj

Very nicely explained Girish .....

However what battery you are using chelu... if its 2S which you should use in case you are going with a 10x4.7 Prop against the recommended 11x7 prop.

You can use 20A ESC with no issues with 2S battery ( 7.4 volts) ..... But will your 50" WS plane take off would be in question.

with your motor the best you can do is 3S battery 2200mAh  & 8x4 , 8x6, 9x5 prop.... Why 3 types because one of these would give the best result according to your plane.

all said the motors max current is 18Amp so ideally we should have min 30Amp ESC to try out different props and batteries.

hope this info adds to the one given by girish.

If you are ordering only one set of prop then that should be recommended one else you have to use 3-4 different props to suit your requirement.

The Motor which cheluvaraj bought draws only 18A so that in my view of selection of esc multiplying max current draw *1.5
so that using a 25-30A esc will be perfect.As the motor is for 2s-4s
using a 9047 prop with 3s lipo and 20A esc Should do it right?

I ordered one 40A ESC, and will be using 9x4 prop to start with.
Also ordered 10x6 prop. would like to see these combination and see how its going to be.

I have built the plane which Arun built. this is my first RC plane and just finished building. need to put the electronics and test it.

Cheluvaraj

put some pics of your plane in the mean while bro...

Hi Arun,

Here are some pictures. if the test flight goes well then i'm going paint this one.
I didn't have a 50" single caro sheet, so there is a joint .

Let me know

thanks
Cheluvaraj

Dear Arun,

Got all electronics. Going for hunting Coro in chennai today.

My Elec:

Emax2822 1200KV
20A/30A Esc
3x9g servo
2200mha 3S 20C (yet to get it)
6ch flysky

Is that good to go?

I am not able to follow the wing construction.
Can you please help me in constructing the wing portion.

Hello shivela The electronics you Have is perfect for this model..
If you can buy a spare 1000-1200mah lipo, 2200mah is possible but for the first time use smaller battery for light weight and greater control..
Any way I am using 2mm coro for the entire build...
I have attached the Dimensions of my plane in the post #49

If you still need some more help with the wing construction.. Will add some more pics for you..
Good day