RC India

Hi Folks,

I just completed the decals of my new foamy 30inch Profile Yak 54. Planning to put the following setup:

Motor : CF 2822 1200KV Brushless Outrunner
ESC : HobbyKing SS 25 AMPS
Battery : Turnigy 1300 Mah 3 Cell Lipo 20C
Servos : HXT 900 9g Servos X 4
Receiver : Assan X8 6 Channel Full Range
Propellor : Either a GWS 8040 or 9045 or 10X5 (will experiment with all)

Note: All decals cut and pasted by hand... No Plotter cutting.  ;D  

Dry Fit Photos:

(https://lh3.googleusercontent.com/_0siHX_jX5CU/TXRlL4tzaaI/AAAAAAAABF4/C6NEq-gb4rQ/s800/07032011184.jpg)

(https://lh3.googleusercontent.com/_0siHX_jX5CU/TXRlW-kv4OI/AAAAAAAABGA/gYrU2QNNyK4/s800/07032011185.jpg)

(https://lh5.googleusercontent.com/_0siHX_jX5CU/TXRljMSQE1I/AAAAAAAABGI/N1QizBYFCH8/s800/07032011186.jpg)

(https://lh3.googleusercontent.com/_0siHX_jX5CU/TXRlvwyjwuI/AAAAAAAABGM/kB2ijxEFYm4/s800/07032011187.jpg)

(https://lh4.googleusercontent.com/_0siHX_jX5CU/TXRmCklBONI/AAAAAAAABGQ/fIY5EAhPAiM/s800/07032011189.jpg)

(https://lh5.googleusercontent.com/_0siHX_jX5CU/TXRmS-aJpvI/AAAAAAAABGY/f_-TP9ur8Es/s800/07032011190.jpg)

(https://lh4.googleusercontent.com/_0siHX_jX5CU/TXRmc50EGMI/AAAAAAAABGc/niifW_c1M70/s800/07032011191.jpg)

Cheers!!!
Saurabh

Extremely neat, think of selling its clones , to the needy.. gr8 job

Awesome!!!  :thumbsup: {:)}

Thanks Buzz_Rc and Augustinev :)

Super finish and the decals are real neat Saurab :thumbsup:,Cant wait to see it Fly this Weekend
Also will keep you posted on the  karjat meet

Looks superb, good color combination

wow!!! great looking bird!!!! pretty nice finish!!!!
at last u decided to finish this model!!!

color scheme is almost same as mine!!!!
would love to see it flying this weekend!!!!!

cheers
Ashish

Thanks for the encouraging words FoamyBuilder  :)

Thanks for your inputs Ashish. Hopefully will maiden her this weekend. ;D

Praveen, if not Karjat, we will surely meet at Airoli this weekend. Not sure how many people would be interested to travel that far...  >:D Thanks for the compliments.  ;)

Saurabh... gr8 job bro .... please pack one in a box and send me one .... >:D

Waiting for the flight Video  {:)}   :thumbsup:

Thanks Divay, Manoj.

Divay, If you need one like this... you gotta come over to Mumbai to pick it up...  ;)

Will try maiden her coming sunday and post the videos.

More build pics to follow...  :)

Some more pics... She is ready to be maiden...  ;D

(https://lh6.googleusercontent.com/_0siHX_jX5CU/TXiDjNJtDmI/AAAAAAAABG4/I0TS6-EAVYI/s800/09032011198.jpg)

(https://lh3.googleusercontent.com/_0siHX_jX5CU/TXiDlv-kLYI/AAAAAAAABG8/3y_Jq8JXLsA/s800/09032011209.jpg)

(https://lh6.googleusercontent.com/_0siHX_jX5CU/TXiDpJrxjgI/AAAAAAAABHE/Vz-Q5c0Srlc/s800/09032011211.jpg)

(https://lh3.googleusercontent.com/_0siHX_jX5CU/TXiEESuVK_I/AAAAAAAABHM/T8qAgNxUbJw/s800/10032011214.jpg)

(https://lh6.googleusercontent.com/_0siHX_jX5CU/TXiEEQ8I9uI/AAAAAAAABHQ/j6SAVI2Jg-I/s800/09032011213.jpg)

(https://lh5.googleusercontent.com/_0siHX_jX5CU/TXiEGiO-QjI/AAAAAAAABHU/xCSlxbbcLf8/s800/10032011217.jpg)

(https://lh6.googleusercontent.com/_0siHX_jX5CU/TXiEb3jyeZI/AAAAAAAABHc/4l7ry-36Pyo/s800/10032011221.jpg)

(https://lh4.googleusercontent.com/_0siHX_jX5CU/TXiEdecS5hI/AAAAAAAABHg/N7wlGlafYJU/s800/10032011218.jpg)

(https://lh4.googleusercontent.com/_0siHX_jX5CU/TXiEheeOjFI/AAAAAAAABHk/HmM5pOxPG8c/s800/10032011228.jpg)

Cheers !!!

extremely neat, is the batt too far forward ? just a passing thought, i love the wing skid being used as a vortex gene (VGs) the angle too is nice, reminds Addition X, sure she will fly great
PS
for the records , did you make it or bought the kit ;D , so neat

post the link for plans please

now now now!!! it s looking grt!!!!!

little doubtful abt motor mount, but lets maiden it on sunday!!!!

will keep my Eurofighter and if possible my broken yak ready for flying!!!!!!!!

Thanks Augustinev. Thanks for your compliments. The battery is way too forward to balance the CG. Done purposely. Be assured this is not bought as kit or RTF.  ;D It is made by hand from SCRATCH. Attached is the plan for the same. I have put the skids in the VORTEX arrangement, though not sure how would it behave in the air. Just hoping it might add some difference. :)

Thanks Ashish. Not to worry on the motor mount. I am pretty sure it is strong enough to support the model.  :) Will try to see you this sunday to maiden her. Please get your Camera.

Cheers !!!

Hi Saurabh,

Great build man..Just some quick questions..

How did you cut the tape on the foam ? I noticed that there's something on the edge of the wings, whats that ?

waiting fr the maiden video..

Hi Atul,

Thank for the compliments.

Are you referring to the color tape ?? If so, its vinyl tape red color and yellow color, commonly available with radium sticker shops.
The other thing is the wing skids available from HK.

wow saurabh bhaiya, looks stunning. How do you stick those stickers so that there isnt any crease formed on them, whenever i try it i always end up having a crease and it looks ugly.

Thanks Rohit.
Applying the decals is easy... just stick from one end and level it out evenly to the other end.. That does the job, no rocket science. :)

Hi Saurabh,

Very impressed with the neat work.

I was just going to search for this plan of YAK 54  or extra 300 to be built in foam.

If you would mind ,i too want to build the same foamy model.Can you further help me on this

I will be arranging for the foam & also will enlarge the drawing on a A3 SIZE paper.

Can you suggest me the step wise process to build this model.This would be my first EP model in foam.

Looking for your Video

regards
peter

Hi Peter,

Thanks for your compliments.

I have attached the plan in one of my earlier posts. I am attaching the same with this post as well.

Please let me know what help you are seeking. I would be glad to help you. :)

Here are the logical steps that I followed:

1.) Take the prints on A4 sheets (16 pages in all)
2.) Stick the sheets together to make the plan. (Used Scotch Magic Tape)
3.)Once the plan is ready, cut the pieces from the plan (like the fuselage, wings H.Stab etc.)
4.) Stick the cut pieces to the foam (using magic tape) and cut the foam into shape.
5.) Once the foam is cut, you are ready for the build.
6.) Assemble the foam and glue it together with Foam safe Glue. (You can even use Hot Glue, but it adds weight)
7.) Now you need to taper the edges (@ 45 deg) of the surface areas to which the control areas will stick. Use a medium grit sandpaper to do that.
8.) Also taper the edges of the ailerons, ele, and rudder that will stick to the surface areas.
9.) Then you can stick the control areas to the surface areas. (I used the Fibre tape and Hinge. You can see in the pics)
10.) Once this is done, your model is ready for electronics.
11.) Mount the "Motor Mount" first. I used Hot Glue to stick the mount to the fuselage and then screwed in the motor mount using 1.5 inch long machine screws. Install the motor.
12.) Now install the servos. I used Hot Glue again to stick the servos to the wings.
13.) Install the Control horns to the control areas. (Again, I used Hot glue to reinforce)
14.) Install the Push rods (Here I used Cycle Spokes, though they are a bit heavy but much easy to install than Carbon rods)
15.) Install the Receiver and set the servos to neutral.
16.) Then connect the push rods to the servos using 2mm "pushrod connectors".
17.) Install the decals.
18.) Dry fit the battery and check the CG.
19.) Install the battery as it would set the CG to the desired position.
20.) Your model is ready to fly.

All this sounds easy, but takes a lot of time :)
All the best... :thumbsup:

Cheers !!!

Nicely put checklist, Does qualify to be a sticky thread. waiting to see it fly

Hi Saurabh,

Honestly I never expected such a detailed step by step explaination.Thanks Buddy,l.

Just we few question if you don't mind.

a) can you advose me the correct name of this foam ?

b) what thickness sheet is required,need to check whether its available in Goa

c) For hot glueing different part  ,can I use is silicon tube ? what your suggestion.

6.) Assemble the foam and glue it together with Foam safe Glue -Is this rubber solution FEVICOL SR 998(Foam safe Glue),can you advose the name  or  brand will also help.

9.) Then you can stick the control areas to the surface areas. (I used the Fibre tape and Hinge. You can see in the pics)-Fibre tape ,Any specific Brand -my be not available in Goa.

All instruction are great

Hey Saurabh !!!!!!!  today was supposed to be  the maiden rite ,where is the video cant wait to see it  :giggle:

Roopa Chaddi aur Banian,

Yeh Andhar ki Baat hai,  :giggle: :giggle:

PS
PVN I heard you practiced some Stomping dance like Stomp the yard today

hahaha  seeing is believing...JR should post the video anytime now

hey also how did you come to know ...it was a illuminati stomp witnessed by just 5 !!!! who is the Gator

did you look up ?no ? that's why !! a spy satellite wizz past all of you'll, it even spotted the missing Yak Motor, still spinning somewhere in the bushes

HAHA true the yak motor ripped apart its motor mount and fell out...the thrust was too much for the balsa mount glued and reinforced only with feviquick

Hey i can see JR viewing this page ,iam sure he is uploading the yak maiden followed by my stomping  ;D

here is our cowboy hero!!!
with his beautiful bird!!!

and here are the culprits, who wanted to break it apart   :giggle: :giggle: (:|~ (:|~ (:|~

Rahul, Angad and look at this Saurabh himself  >:D >:D!!!!

maiden and culprit Praveen stomping video coming soon !!!!  >:D :giggle: :giggle:

Look at Devil Praveen, stomping!!! keep watching for Maiden video coming soon!!!!

http://www.youtube.com/watch?v=ACyESyZp_wk

CRIMINAL AND DEMONIC!! >:( :o


Or is there a reason I don't know??

Here is maiden, it went up pretty good, but note sure what went wrong, and came down, nose dive!!!!

same thing happened with me, few months back with my YAK

http://www.youtube.com/watch?v=XuYhpN044m8

this is the reason amir and i dont like yaks..have said i earlier many times on our field..also.

Wonder why it was sent straight up in the first place ?  Did the motor cut off ? Was any check done of the power system in terms of amps drawn ? 

Seeing the people involved, I am pretty sure all these have been verified, still had to ask :)

Yak

Quote from: akky on March 13, 2011, 07:57:43 PM
this is the reason amir and i dont like yaks..have said i earlier many times on our field..also.

Yak is a very forgiving plane..I'd never blame its design in perticular. If it were me, i'd rather focus on what i did i do with it.

+ to that,

Foamie especially requires little control power to fly, because of which it tends to be snappy, so maiden is always is with very little throws and slowly increase it and take it from there, i am not saying that's what has gone wrong here, it could have been bad motor to radio lock out to a bird strike.

after crash, Saurabh was saying that he didnt had any control on it, may be radio issue, but it cost him his beautiful build

Hey Ashish Y dint you post the video of saurab  >:D himself driving his car back and forth on his model wheel spinning trying to rip it to Smithereens

>:D himself ask me to stomp on it ,,,me has to follow after all  >:D is my gutuji & unfortunately this was the dakshina  he  asked for a  Stomp Pomp Romp  ;D

we should never use motor power for take off, we should let wing to do its job

+1 for that

Cause for most crash, esp foamies

Quote from: foamybuilder on March 18, 2011, 05:10:39 PM
we should never use motor power for take off, we should let wing to do its job

Flat-foamies (with no airfoil) DO NOT produce any lift !
U need some motor power (thrust) for forward motion in order to get it going in flight (irrespective of airfoil ).

Quote from: foamybuilder on March 18, 2011, 05:10:39 PM
we should never use motor power for take off, we should let wing to do its job

Quote from: Vector on March 18, 2011, 06:31:34 PM

Quote from: foamybuilder on March 18, 2011, 05:10:39 PM
we should never use motor power for take off, we should let wing to do its job

Flat-foamies (with no airfoil) DO NOT produce any lift !
U need some motor power (thrust) for forward motion in order to get it going in flight (irrespective of airfoil ).

This is not totally true. Flat-foamies at zero angle of attack doesnt produce lift. But at a given angle of attack, they do.
Also some of the flat fomies does have the wing attached at a certain angle to the horizontal plane.

Quote from: foamybuilder on March 18, 2011, 05:10:39 PM
we should never use motor power for take off, we should let wing to do its job

Foamybuilder, both U & I are correct...

But, i m still wondering why U said the above quote  :headscratch:

In general any airplane, be it powered/non-powered etc. requires airflow over the wing surface so that it produces lift  for flight to happen & for that, thrust should be > drag and lift > gravity {:)}  .This is when the aircraft has good enough forward motion...achieved with the help of a power plant(engine+prop)/source/been towed (non-powered a/c) by another power-plant or airplane.

Vector'
Please read Lift drag, thrust and wt Rep 2 # of this thread, any doubts questions, gimme a pm/post it here
http://www.rcindia.org/rc-general-topics/basic-aerodynamics-for-rc-flying/

I have added Flat Plate Aerodynamics
Se Rep # 58 of the same thread

agustinev, no doubt all forces acting on an airplane have to be balanced in order to achieve flight...I have tried to explain someone here in very simple terms what is needed for an a/p to takeoff/fly. Coz someone here said and i quote.."we should never use motor power for take off, we should let wings do its job"...and the discussion was limited to an incident in which somebody crashed his new RC plane just after take off i guess, for reasons unknown. None of us was interested in being too technical about it (there was no need to be).
Plz care to go thru this thread and shed some light on the above mentioned quote if you dnt mind. Again... here we are talking about RC's only :)

chao.

@vector
I think I should have quoted  "we should never use motor power ONLY for take off". What I meant was when we hand lauch, we should not launch it at an angle near to high alpha, where wings wont be producing lift, only motor thrust will be just dragging it in that direction. If it is a maiden flight, and if motor doesnt have enough thrust, and we launch at that angle it will b a disaster.

Well said foamybuilder, i was expecting that.
It is always a good idea to launch in a straight line creating better airflow over wings=better control. Unless, we are skilled enough and the plane has enough power to pull itself out of an unwanted situation (higher angle of attack during launch and less airspeed resulting in a power-on stall....ouch!!).
As you may know many 3d people simply like to release them off their fingers and let motor do its job... and i love to do it too >:D

cheers.