Manoj thees are pics of fuse in the making, sandwiched 2 thermocol sheets together and added a wooden light stick between them. Looking for ways to strengthen thermo fuse. Now I can understand what you were talking about regarding the CG issue. This may remain tail heavy no matter how close I place battery to the nose. Any solutions...??

@ swizera - Thanks a lot for the Easystar dimensions. will helpme a lot.
@ Amit - looks like you and i are doing the same project, nice sanding job you've done on thermacol .....a few queries.

> what material you are using ... Thermacol I did went through your reinforcement techs they are helpful.
FIN and Stabiliser will be too fragile with thermacol even with reinforcement, i am looking for depron ( or high density thermacol sheets)
> what power system you plan to use?
> where will you put the ESC Battery etc... what i plan was use 3 sheets instead and have cavity in the middle sheet for space for battery and esc. this will also give more strength to fuse.
> How you plan to mount motor?
> PM your mobile no. so we can further exchange ... views

Saurabh, I have used same dimensions for fuse which (Manoj) swizera, has uploaded.

Till now everything is thermocol, wings and fuse both. For wing reinforcement I have used wooden spar, fibre tape, 25% diluted Fevicol SH and tissue paper.

For fuse I have added a wooden spar between both sheets. After creating cavities for servo and other electrical parts, I will use Fevicol and tissue paper on fuse also, and then fibre tape.

For control surfaces, I am planning to use 3mm / 4mm coro sheet.

Power system would be 2211/13 motor with 30AMP ESC and 2200 3S batteries.

Where to place battery and ESC have to be figured out yet, depends upon CG, what would be the correct place, will upload pics again when that part is done.

For motor mount again will refer to Ashta Sir's easystar plan, using 2/3mm ply.

Quote from: amit_delhi on June 14, 2012, 10:00:31 AM
Manoj thees are pics of fuse in the making, sandwiched 2 thermocol sheets together and added a wooden light stick between them. Looking for ways to strengthen thermo fuse. Now I can understand what you were talking about regarding the CG issue. This may remain tail heavy no matter how close I place battery to the nose. Any solutions...??

I always face the same problem , every time i went for a pusher. Best u can do is
1. Place the servos near to the nose as much as possible.
2. as it will belly land, try to wrap or put some small balsa or wood or small aluminium plate at nose belly side. it will safe the nose while hitting, belly while landing and  will Increase NOSE Weight fot Cg.
3. make a bunch of rs 5 coin and put on nose somewhere.
4. If it is possible then increase the nose lenghth.

Amit after all this i strongly request u to make the plane as light as u can. 

Needing one advice...
How will we come to know that the battery has reached the low voltage and we need not discharge it further.
Does everyone flies their planes with Low voltage alarms??? Or is there another way?
I want to take precaution as i have lost one battery due to over discharging.
regds
Saurabh

Saurab
While flying u will fell low power . Further u should land your plane and check the battery , then if is has juice can fly again.
People fly with low voltage alarm, as they are very small and light weight.  I am also taking one and will fly  with that.

I got your point, So the low voltage alarm is important.
Just another query what is low voltage cut in ESC?? will it not serve the purpose.

Hello friends,
here is so far update of my project.....

Hope is resembles easystar, dimensions are are a bit smaller than easystar .

@Amit - as your suggestion i put the tissue paper with fevicol but now there are wrinkles all over the wing .. i tried the best to do.

Any remedy other than sanding... do we get covering sheets to make surface smooth ( i know HK but want to limit budget)
Celo tape is one option...

one major challenge is to cut the wing slot in fuse--- anything you try the cut will not be straight... any suggestions... to make things tough i have sealed bandage between the sheets as a reinforcement ( its too strong)

two more things
What is the best angle for wings ( angle of attack )??
What should be the motor direction how many degree up and left???

Hope to get answers to this....

Just check a long piece of thermocol by covering light tissue paper and attach with adhesive (fevicol marine diluted with water). Dry it and test the rigidness of that body. Though you have reinforced with wooden member, you will find the culprit (FOR CG) might not be required.
You can color the tissue easily with water color too. And while fixing two or more piece of thermocol, please use tissue in between thermocol pieces for better joint.
Just a idea.

thanks but i have not used any wood in the easystar look alike...wing span is 1000mm so not putting any spar and relying on the wing reinforcement.

Plane is looking nice saurabh. 

  great finish you got there sourabh....amazing..some wrinkles will be there no matter how carefully you apply Fevicol Solution.

Saurabh, How strong u fell the parts , after applying the fevicol solution ?

Suggestions For Post #32 - wing opening.

Rather than try to cut the opening for the exact aerofoil shape, try to cut a rectangular opening. Then add thermocol in the center of the wing and shape it to the dimension of the opening in the fuse. This will be lot easier.

Keep the angle of attack as 0 for starters.... go from there.

Nice hands...you should create the mold out of your built and start producing the plane in bulk...good work..

Thanks Sandeep for the comment, but 90% of good work is due to good hot wire cutter.... It makes the work lot easier.

@ swizera - Tissue coat with fevicol gives very good rigidness.....My WS is 1000mm and I am planning to go without spar..... a double coat with tissue and fevicol will give extra strength.
Try using high density thermacol. Once the wings are cut by hot wire they are very strong due to layer of melted thermacol on both surfaces but once you sand it ... it looses the strength, this is where fevicol coat plays role.
For fuse I had put bandage cloth in between 2 sheets ... this gives good strength..... only issue is that it becomes very tough to cut through ( hot wire does not cut the cloth !!!!).

@ PankajC - Thanks for the suggestion for the wing slot.... that is exactly I would do, But
I argue for 0 degree AOI.... simply just because all trainers have it........ Will 0 deg give more stability.....?? (This will be my first plane and first flight - no prior experience so want a stable plane)

On the second option I was thinking to cutting the fuse through the wing cord line and put hinge under motor and screws on other side ( do not worry I can do that in the lightest way) that way I can set up to have diff AOIs.

Personally I would prefer to have a fixed AOI (3-4 deg as in Easy star)

What do you suggest? 

Regds
Saurabh

Bump for Mr. PankajC comments....

Great effort 

Saurabh,
On the incidence angle, I am have no qualification to say how much of AOI is stable. I simply understand that the AOI increases the lift to a certain degree, however, the same can be achieved with a slight up elevator as well - slight tail down would increase angle between the air and the LE of the wing.

Thats what I generally do....

Excellent workmanship saurabh. It loks realy nice.
Now if you have not flown before, do take the help from other experienced fliers. You have made it very nice looking  thru ur pains taking efforts.
best of luck
ashta

Such comments from senior members make me feel elated and inspire me to further indulge into hobby.... my next venture would be a replica of HK funjet....easystar replica took me nearly 2 month planning & acquiring material. With your wishes let me see how fun jet will come out.
Need to do exhaustive study to understand the aerodynamics of a jet..... if you have something or some ref. thread please send or advice.

Thanks /// saurabh

Dear Astha ji,
I knew it that i will get answers from you  searched a little and found this post of yours...
http://www.rcindia.org/electric-planes/simple-funjet/msg31645/#msg31645

Please guide me on the motor part, Propeller & material used... where can i get high density thermacol 10mm sheets ( i guess these are called depron sheets)

regds
Saurabh

Depron is different from Thermocol.
in thermocol, you get different densities. Local shops selling thermocol will have different density ones. In bangalore, i know that it is available near shivajinagar.
As far as motors a good general purpose motor for jets is
2212-06 with a 60X40  prop

Wow! Nice build Saurabh....! 

No updates  Saurabh .  Did you maiden it ?