Hello everyone,
I've been off this forum for a while now, but now is the time to come back, (hint hint: Sweepstakes  ). Since I have build and flown a couple of gliders and other 3 channel models already, so this time am gonna try my hands on a 4 channel aileron trainer, and try to get some good flight time under my hood.

Here are the specifications of the plane as if for now, the pics will follow suit once I start building

Model Name: Telemaster

Wingspan: 30"
Chord Length: 5"
Fuse Length: 22"
Aspect ratio: 6
Wing Area: 150 Sq in

Power Setup
Motor: 2800KV outrunner  http://hobbyking.com/hobbyking/store/__19834__29_5x26mm_2800kv_Brushless_Outrunner_Motor.html
ESC: HK 10A Xhttp://hobbyking.com/hobbyking/store/__14870__H_KING_10A_Fixed_Wing_Brushless_Speed_Controller.html
Prop: 7X5 or 8X4 as this is what i have laying around
Servo: TGY 9Gm

will start uploading the pic once i start building from tomorrow, ritenow I just want to confirm whether this power setup is appropriate  or not?

experienced members kindly pitch in
regards
Bilal

If it is based on the famous Hobby Lobby Telemaster, it would use a lower speed/higher torque motor.

What do you anticipate weight as (including the battery?)

If you scale it up to maybe 42" span, it would be easier to fly

Best wishes..........Yes I think 42" is more better than 30" wingspan.

Sanjay sir: thanx for the response,  I've seen the Telemicro that is available on HK, but am using plans for Telemaster 400, designed for speed400 motors, that i found online. So do i still need to change the motor??

Ayub Sir: thanx a lot for commenting, but the problem is the only place I've got for flying is my college football ground, and 42" is a little too big for it, at least i feel so.

So, finally you are in . I'm waiting eagerly for the pics.

Utkarsh: this time the build log would be as detailed as possible, soo keep watching this space

Sure buddy... Even I'm waiting for the build logs.

@bilal
Saw your pms
As suggested by Sanjay sir, a larger size may be better.
The essential character of the Telemaster is SLOW majestic flight.
To retain the same character in a 30" 150 sqin model, you will need to keep the weight down to below 240 gms or so. With 42" 250 sqin, you could go up to 500 gms or so.
Please weigh the motor, prop, esc, battery, servos, rx and pushrods.
This may exceed 150 gms.
See if it will be possible to build the airframe with undercarriage and wheels in 90 gms.
Will be nearly impossible.
However, it may be possible to build a 42" span airframe within 300-350 gms. Possible but not easy.

You didn't say what battery. 2s or 3s?
A2800kv motor will run 25-30,000 rpm on 3s. My guess is that a 7x5 or 8x4 will draw 25-30 amps. Will fry your 10a esc in seconds. Perhaps a 5x3 on a 2800kv.
Please look up electric prop safe max rpm data.

Finally, a 36-42" telemaster, in my opinion, will be a pleasure to fly, provided you stay within certain weight and power boundaries.
Best of luck.

Edit:
For comparison, my INDORE BIPE is 24" span, 288sqin, 280gms, draws 3amps on 8v, or 25 watts.
A 2800kv on 8x4 and 3s may use 300 watts!

okay Iyer Sir, the max i can go is 36", what should be the ideal aspect ratio then??
besides this, am using 2s 2200mah lipo, and i have a 20A esc too, should i use that??

the only problem is i don't have a space large enough to fly a 42" airplane, the last time i build a four feet glider, it was too hard for me to turn within limits, that is why am soo hell bent on 3' wingspan

@bilal
Are you not flying at Butchery Ground?
What is the size of your field?
If the plane is larger/faster/more powerful than a GWS Slow Stick, it will need an expert to keep it inside a football field.
For 36" size, please look at Schoolboy plan at outerzone.co.uk.
For a small field you need SLOW SPEED, ie, LOW WEIGHT / low wing loading.
Below 6-7oz (175-200 gms) per sqft of wing area.
You say your battery is 2s 2200mah. Are you sure that's correct?
Usual size is 3s 2200mah.
Your battery itself must be 120gms or more. 180 gms if it is 3s.
Can you keep all up weight below 240gms?

Sir, this is the battery that i have,
http://hobbyking.com/hobbyking/store/__8935__Turnigy_2200mAh_2S_25C_Lipo_Pack.html

i don't fly at butchery ground, simply because i live in university hostel which is around 23kms away and hauling the plane back and forth without any means of personal transport is not possible.

the ground i fly in is about 120X150 yards approximately, but it is surrounded by buildings on three sides.

so please suggest what changes i need to make?

regards
Bilal

For small field,
Light & slow.
Does not have to be small,
as long as wing loading is below 6-7 oz (175-200gms) per sqft.
Notice how this objective was achieved in the BIPE? Large area, low weight, low power.
Your battery itself is 134gms!

Please see webocalc 1.7.6

okay sir will do as you suggested,..... what is the ideal aspect ratio by the way for the kind of slow docile flight characterstics your bipe had??

For slow flight the only reqmt is LOW WING LOADING.
Aspect ratio does not matter.
BIPE aspect ratio is 4.
For a monoplane, less than 5 or 6 is inefficient. But you could try.

I repeat, it is not the size that matters.
If you could build a 6ft span model of 6" avg chord, (aspect ratio 12), ie, 3sqft area in say 500gms with electronics and battery, you could fly it in a football field, as the loading would be only 6oz/sqft (18gms/dmsq)

You wiil find hardly any models with aspect ratio below 6. Higher aspect ratio wings are more efficient, as long as you can make them stiff enough not to flex under bending or torsion loads.

What you have to do is
A. Weigh the payload, ie, motor, prop adapter, prop, esc, battery, servos, pushrods, undercarriage, wheels
B. Weigh your material. My 5mm biofoam weighs 160gms for a 40"x25" sheet, 160gms for 1000 sqin. Or say every 6 sqin weighs 1 gm.

(Contd)

What you have to do is
A. Weigh the payload, ie, motor, prop adapter, prop, esc, battery, servos, pushrods, undercarriage, wheels
B. Weigh your material. My 5mm biofoam weighs 160gms for a 40"x25" sheet, 160gms for 1000 sqin. Or say every 6 sqin weighs 1 gm, or 0.16 gm per sqin, or 23gms/sqft
C. Assume that the amount of material required is four times the wing area (for wing top, bottom, fuselage sides/top/bottom, stabilizer/elevator, fin/rudder.

To obtain a wing loading of 6oz/sqft:

6oz/sqft=175gms/sqft=total weight/ wing area
={payload weight gms + (4 x wing area in sqft x material weight in gms per sqft)}/ wing area in sqft

Solve for wing area. That's all there is to it! 

It is 3 am now. So go to sleep and solve it in the morning.
Goodnight.

Niall which aileron servos  are you using (gm?)
Pl put a photo of mounting it on wing if you can

+1 Iyer sir! That is the fundamentals explained so easily, that even I can understand it!

Jokes apart, Iyer sir is absolutely correct Bilal. Keep the wing loading low, and the motor speed too. At 2800 RPM, you probably looked at the torque (read thrust on a specific prop) but when you try to slow down the motor, the reduction in power and torque will not be friendly i.e. you would need to maintain a certain RPM for that 2800 motor to sustain the torque required, and I fear that RPM would translate into a very high airspeed. If you reduce it could stall or worse, the dreaded tip stall 

@bilal
??

Hello everyone,
Iyer Sir, sorry for being late
thanx for all the efforts you took to embed some basics aerodynamics into my otherwise ignorant self. 
Taking your suggestions seriously, am willing to change the dimensions of the plane, or even the entire design altogether, if required, so lets start over again from scratch. 

Here is a list of the power setup combinations that I have with me:-

Motors
1. D2826-10 1400kv Brushless Motor  http://hobbyking.com/hobbyking/store/__12920__D2826_10_1400kv_Brushless_Motor.html

2. 2210N 1000Kv Brushless Motor  http://hobbyking.com/hobbyking/store/__8621__2210N_1000Kv_Brushless_Motor.html

3. FC 28-22 Brushless Outrunner 1200kv http://hobbyking.com/hobbyking/store/__5354__FC_28_22_Brushless_Outrunner_1200kv.html

4. 29.5x26mm 2800kv Brushless Outrunner Motor  http://hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=19834

5. 24gram Brushless Outrunner 3000kv http://hobbyking.com/hobbyking/store/__5453__hexTronik_24gram_Brushless_Outrunner_3000kv.html

Propellers

9X4.5, 7X5, 8X4.5, 9X4.5SF and 7X3.5

ESC

1. H-KING 10A Fixed Wing ESC  http://hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=14870

2. HK SS Series 18-20A ESC http://hobbyking.com/hobbyking/store/__6457__Hobbyking_SS_Series_18_20A_ESC.html

3. Hk SS Series 25-30A ESC http://hobbyking.com/hobbyking/store/__6458__Hobbyking_SS_Series_25_30A_ESC_card_programmable_.html

Batteries

1. Turnigy 2200mAh 2S 25C Lipo Pack http://hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=8935

2. another wolfpack 3S 2200mAh, which I think has gone kaput

so guys, forgive me for boring you with all that mumbo jumbo, but this is all I have, so please suggest me a slowest flying plane that can be built out of it.

thanx and regards
Bilal

only one suggestion ... get a 1000mah 3S battery.....very good for a 40" size plane and the power setup u have.
2200mAh is too big and heavy.


Easy was is to search on the HK site see find a model approx looking like yours in size and shape.... match the power system for your plane.... and i have not seen a plane <40" WS having 2200mah battery

Saurabh Sir,
the irony is I can't buy anything at the moment, so have to suffice with what i have

regads
Bilal

Bilal as Saurabji said , get a 1000-1500 mah lipo. 2200 wil be very heavy.
In my opinion FC 2822 will be best if you keep the AUW less than 500-600. It has good power and weight only 40gm and less amp draws.

Bilal not to worry about the mAH of the battery.... mAH is only the stored power capicity of the battery... yes higher the storage capacity the weight also goes up...... I am using a 2700 mAH 3 cell for my 40"trainer model... the advantage of using a higher capacity battery is... you get a higher time in air... i.e. it can power your model for a longer time.  The 1000mAH batter would weight about 80 gms or les than your 22oomAH battery... guess that should not matter much on your model....  Just do not be worried about the weight of the battery.... in fact one check at the HK site reveals the following:-
a standard 1000 mAH battery weighs about a 100 gms
a standard 1500 mAH battery weighs about 125 gms
and a standard 2200 mAH battery weighs about 180 gms....

What you need to be worried about it...
total weight of the model and
the motor required for it....
even if the battery is under capacity or over capacity will make a difference on the total flight time and not much else....


Happy making your model and flying it....

Bilal in that case go for bigger WS....52"

Its easy with a wooden spar and Brown paper coating only and leading and trailing edge.