Thanks Avijit,
                 I like the appretiations and suggestions from you all guys..

Regarding the fusalage, i will be making it with Plywood and thin sticks (4*4 mm approx in section) of mirandi wood., Since i have decided to use .25 size engine(ASP), which has been dispatched from RC dhamaka, nd im jst waiting very eagerly for it to reach me

The chord length is: 220 mm
max thickness is 38mm which is at 65 mm from the edge of nose.
Wing Span is 40 inches.

Weight not yet calculated, but expect it to be below 200 gms. I will pst it soon.

:help:Please can you tell me the dimensions of 240cc of fuel tank(by RC dhamaka), so that i may proceed with the fusalage.
i will make the fusalage accordingly.
Thanks,
AbhaY

Quote from: abhay1290 on January 17, 2011, 03:46:00 PM
I dont know how this topic has been moved to electric planes. . I am making it for ASP .25 engine. Which i have ordered from RC Dhamaka.

Basically, I was trying to move threads to the right boards, out of the "College projects" one.  That one is for somewhat exotic stuff. Plan builds do not really belong in there.

I have moved this to Glow planes board. 

BTW, great build   I don't remember seeing the use of regular plastic sheets for covering so far here !

Thanks anvar.

Hello buddies,

Ive started with the fusalage as well.

The whole framestructure is been built using mirandi wood,, and 6mm plywood. Though incomplete, i expect to work on it ,to build it complete on the coming saturday.

and one more thing discovered, mirandi wood, if completely dried, shows properties similar to bamboo wood, in terms of flexiblity and strength.

Your suggestions will further help me...
thanks

bump

dont know what to do further to maintain cg of plane. weight of engine itself is around 500 gm including the tank.. help buddies

Fusalage compleated.
Only airlons left.

Good build.

Take care of these,  points (To ponder)

1. take off speed will be high considering the weight of the model and the span, so run her on the take off path controlling direction before you apply backward pressure on the elevator control.

2. will be slightly snappy in the roll plane, carefully balance your laterals.

3. Do a level flight stall(Called the 1 g stall) before coming into land, can wing drop, looking at he taper of the tip chord.

4. Don't be surprised if it takes a a while to lift off.

looking forward to the video/outcome.

PS
is it possible to maiden electric?,
very neat nose and the tail-wheel combo, i remember a real life aircraft had one such design

augustinev sir,
i would like to know more about 1 g stall. I m very new to Remote controlled plane. And this will be my first engined plane. I only have experience with self made electric gliders(non r.c) and r.c. micro planes( chinese ones).

As far as model is considered, it is a mixture of many airplane images from google, and the balsa built-ups of this forum. the tail wheel is just to protect my rudder during first landing, instead of tail skid.

Please instruct.
My present AUW is 1.125 kg, excluding only aileron and its servo.Weight includes batt, Rx and half filled fueltank.
I would also like to know whether 9 gm servo is sufficint for aileron.though i dont think so, but ill go for a standard servo only on experts advice.

Abhay,

1. 1 g stall is in level flight reduce the speed and notice the speed at which her nose/wing drops. this you must do it at height, this speed you must not reach on landing, since this speed is going to more of a perception, you need to remember (a) model flying higher, speed appears less (b) winds are stronger, higher cater for that (d) on approach keep speed slightly higher, the way to do that is look at the nose wheel, it should be slightly up remember to hold it at a certain attitude and not change it, use power if required
(e) if you are new to the game, get some expert to maiden

2. As I see it, wing loading of your model appears to be high, cater for that

3. If your proving your airframe's airworthiness i suggest you save your engine, try it with motors, motors definitely withstands crashes better,

4. be very very critical on your CG, a shade forward is better than back, remember that.

all the best.

post some more data, let me run some math for you.

don't worry, it will be successful maiden (see if you can reduce profile(Form) drag)

ps

9 gram servo, if you have used jitters quite a bit, especially when there is unnecessary loads like the control resistance, go with 16 gms servo should do just fine, lateral control throw should not be too much remember, because snappy in roll will respond in roll input also faster,

augusteniv sir,
what all data is required for calculations? please tell me. i dont know what all things to provide and how to calculate them. please specify.

Regarding drag, please suggest me some measures to reduce it.

Is there any way to reduce wing loading further? Or shall i construct a new wing with larger wingspan, since i dont want to lose engine, due to high speed.

data:

1:CG of my plane lies beneath the wings, at nearly 30% of the chord length.(the tail is slightly raised up)
2:The rear wheel of the three in front, is at nearly mid of chord.
3:Wing span is 40"(effective).
4:The fusalage has not yet been covered,(whether covering will reduce air friction, reducing drag?).
5:tail control servos are at tail to balance the ASP .25 at nose.
6:AIRFOIL section is semi,symmetrical.
7:Chord length  is 220mm( 8.66")
8:Wing area=346.5 sq inches.

the attachment contains the reference which i have refferred all throughout.

And sir, what must be the estimated speed of takeoff?

Model flown.
today i took my model for flight. It flew at very high speeds, so i didnt used rudder at all, just saw the liftoff and landed, all done in a slight curve or nearly straight line.
Even airlons doesnt have any effect.
Im not happy with the flight so i decided to increase the wingspan.
Im am a slight dissapointed, please help people..

/i was just wondering whether to reply or not, but edison uncle striked in my mind.

increasing wingspan was not possible with the previous wing so i made a new one using reinforced thermocol..

Now it was a flat bottom airfoil for more lift at slow speeds..

now wingspan is 50 inches