Hi Friends,

I have build my Second RC Plane and this time with Coro Plastic sheet, 4mm
only wheel installation & Flight Test is pending.

I have not flew any plane before but as of now Three planes are ready for fly in my Hanger.....lol

First I build Delta with cardboard, second I bought a GWS Beawer and this is my third plane
also this is my first plane with Airfoil wings, I hope it will work. [Finger Crossed]

I have no background of electronics and RC world. So give your valuable views on this plane

Thanks 

simple as well as good, keep it up..............

Why not keep flutes parallel to fuselage ?
Pushrod guide will be served if you keep servos under wing for CG.

Great job GB... great.. 

Kalyn sir : Thanks for ur feedback but again I Didnt understand

Roopesh Sir : Thanks

wht is flutes ?
do u mean those sticks holdoing wing with help of rubberband ??

coro sheets k middle me jo hollow jagah hoti hai usko flutes kehte hain, inka bolne ka matlab hai ki agar tum sheet ko seedha karke lagate to unme se tumhare plane ki pushrods ja sakti hain

Hi gbisht,

May i suggest a few points.

1) The motor's thrust line does not appear to be correct. During flight, the plane might tend to pitch nose up. I would suggest to start with motor's thrust line parallel to the wing and then increase or decrease the down thrust and left-right thrust according to her behavior inflight.
2) Main wing appears to be curved on both sides. I guess the under side should be flat. This would result air to move faster on the lower side and slower on top side, creating lift.
3) The main wing's wooden stick holder's appear to get bent when rubber bands are put on. If the plane crashes, these may holder's may break. If possible make sure they are easily replaceable.
4) The elevator's servo arm must be perpendicular to the servo when in neutral position. This will generate equal deflections when the servo is activated.
5) The rudder does not appear to have sufficiently beveled. Please check you have sufficient throw's before the first maiden.
6) If you have never flown a plane before, do plan to put a dihedral so that it's easy to learn. You may also put a polyhedral at the wing tips.
7) The wing loading does not appear to be sufficient. If you know it's correct and according to plan then it's fine. Otherwise calculate it, else your plane may not even lift off the ground.
Do a CG check. Should be approx 33% from main wing's leading edge.
9) Do a power off glide test before maiden.
10) Ensure thrust to weight ratio is either 1:1 or more.
11) Try to maiden in a no-wind or less windy conditions. Take her high and then adjust her trims.

Oh! ok
Thanks vineet, first coroplastic plane, still have to learn so many things, due short of coro I used Deperon for Fin.

I hope it will not create any issue.

+1 to ashutosh  , i was feeling sleepy to type some of the point   , you helped me thanks

Thanks Ashutosh/Vineet,

Still so many things to learn..........

try a plan ,print it, go with it

yeh! sure for next time, I started it and from long time, it was unfinished.

Now in next one I'll go with a Plan......

Is that a DT-700 (or DT-750) you are using? That's one monster of a motor. It is generally used for bigger birds or 3D planes.
Also, using 4mm coro for the whole plane results in a really heavy plane (I made the same mistake as a beginner). Try foam wings with a coro fuse.

The plane has been nicely built. Good luck for your maiden! 

One Main thing that Ashutosh Mentioned is Point 7. The wing area is not sufficient to generate enough lift.
You need bigger wing area .you can increase buy making it polyhedral same as MOSS wings.Pic Attached
I am also making a pusher  plane and same wing area is my problem.

Give it a Maiden try.  

@ Swapnil:
DT-700 or 750 should not matter. I am of the opinion that motor's thrust, AUW and CG need to be correct. I am also learning, but sharing what I understood.

@swizera:
I had also built this same polyhydral wing for my blu-baby. It also had 45% of up angle. But in the high winds of hoskote, my plane shows more tendency to roll. In the field itself I then cut off the polyhydral and the roll effect stopped. I plan to put back the polyhydral but at a very less angle of 2-3 degress.

Ashutosh, all I was saying is that the motor, if it is a DT-750, should be avoided for a plane with such dimensions. It's twice the weight of a motor that'll do the job.

And you are right, with its enormous thrust and efficiency, it can make this plane fly! But I wouldn't dare to fly it as a beginner!

Hi gbisht,

having a heavier more powerful motor on the plane is fine (more power is never bad ) unless you exceed the recommended AUW (or wing-loading) per plan. By looks, this bird has a higher wing-loading ( due to the smaller winged and all 4mm construction mostly) which will cause the flight and landings to be much hotter (faster) ( like Swapnil said) than usually a newbie can handle.

And next time having the flutes run straight down the fuse will also give more strength to the fuse. Having it the other-way, the fuse tends to fold.

But most of all, congrats and good luck with all your future builds.

Sam.

Hi All,

I have noted lots of points and work on it,

1. Build New Wing with large length, and flat from down and curve on top.
2. Build Wing with 2mm Coro insted of 4MM like present
3. Calculate CG before fly
4. Check Weight before fly, and try to reduce it

Ashutosh Ji: I will contact you during new RC plane building......

but I dont want to waste more time in this plane, so I do little changes and try to fly it......and if crash build new one with scrach with a Plan.

Swizera & Ashutosh : If I add that wind do it need to build it in Air Foil  or Flat??

Wing span is 2 Ft
and total body weight with electronics is around 400gm to 500gm.........ruf idea

As you have made the wing in airfoil, you should go with the same airfoil for better results.

Or alternatively I can increase the length of wingh.......right ?

right now it is 24" so should i go for 36" ? or less ?

right..... you can increase the length of wing.
And yes go for 36.  

Also check the Fuse length , according to the wings...

what about rest, can you tell me how to calculate tail wing and fin with help of mail wings

Suppose now I build 36" wing the how much tail and fin ??
plz tell me in leman language,....plz

 
Buddy sorry , but all those calculations always fly over my mind  . I always see things very simple and never make those calculations.
But always see the ratio factor.
A SENIOR member or Those great mathematical minds can give you more details. Wait for them to reply.
From my perspective your tail and fin are all right, no need to change anything there.

May this pic may help with some calculations

Hi all,

Today I took it on Field and fly, Yes it flew, but the wind was too gusty/I am beginer and after few crashes (4-5) I lost my both Propellers, Body is still able to sustain more crashes, but I will build new one rather then to repair it  and consider all points suggested by experts..

Build Video, Me n my brother, he was throwing it as well as shooting, so video it not good so not posting this time.

Weight and electronics was good, only need to build Large Wings this time,
and consider all other important points.


Thanks Everyone