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« on: April 08, 2012, 11:36:51 AM »
onthefly
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City: Chennai
State: Tamil Nadu
RC Skills: Beginner
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Hello fellow  RCIndians!!

This is my first post in the RCIndia forum (comes after reading a lot of them!) and I am a beginner in the field of rc flying. I flew with my friends sometime back and it was just amazing.. Along with the thrill of flying an rc plane, I am very intrigued by the idea of scratch building my own plane. This way I hope to understand the concept of rc flight and be creative a little (and it'll also be easy on the pockets Wink).

So, for my first  plane, I've decided to go with the hugely popular Blu Baby design by Tony65x55. Its seems to be an easy to build plane and very forgiving to beginners flyers and scratch-builders both. The plans are at the following link:

http://www.rcgroups.com/forums/showthread.php?t=681556

Its a high-wing design which can use an under-cambered 33" wing or a sport version 32" kfm3 wing. I am going for the kfm3 as its easy to build and very revolutionary in its design. It also uses a mono-block design which gives it additional rigidity and easier build.

Electronics (from Aero Engg. Works):

DYS 1450 kv Brushless Outrunner 2822 - 550g thrust
40 amp ESC
11.1V 3S 1100mAh Fullymax LiPo
FlySky 6Ch Tx/Rx (On order)
9gm Servos - 3(on order)

Build Material:

10mm and 12mm biofoam - For the fuselage and monoblock.
2mm Coroplast - For the wings and stabilizers.

I was restricted in my build materials as the shop I bought from didn't have stock of 6mm biofoam which would have been preferable, so I had to make do with the available 10mm. Also the mono-block requires a 1" or 2" piece of foam. I could not find that, but I have seen high density thermocol of that size, so maybe would go for that (suggestions??). As for the coroplast, its a beauty. Its easy to work with and provides great rigidity. Also hinges and folds are easier to make due to fluting. For my kfm3 wing it was an ideal choice, as 2mm or 4mm foam wasn't available. do ask if any one needs the name of the suppliers.

Also a big thumbs up to Aero Engineering Works in Chennai. As I am a college student, I had to budget my build and AEW helped me to make it economical yet efficient. My interest wouldn't have become a hobby without there help.

I'll update as soon as I progress.

« Last Edit: April 09, 2012, 01:46:50 AM by onthefly » Logged

When once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return.
 

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« Reply #1 on: April 08, 2012, 11:47:03 AM »
roopeshkrishna
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City: calicut
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Fly.. welcome to RC India.. and happy to hear that you started your works after some reading and self research.. it is sure, that today anyone can enter in to RC flying, because of the low priced stuffs all around.. have some nice crafts and nice RCying.. Thumbs Up
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« Reply #2 on: April 09, 2012, 02:39:34 AM »
onthefly
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Thanks  Grin

Just thought Ill update.

Wing and Stabilizers Build:

I used 2mm Coroplast to make the wings. I used the kfm3 airfoil, which requires one piece of material to pasted on the middle of the wing and the front portion folded over and stuck to the piece. I used hot glue to stick them and then used fibre tape on the 2 steps. I also used tape to cover the open flutes in the coro

The stabilizers were cut from single 2mm Coro sheets. I used the modern V-Stab as it is straighter and easier to cut.

I had a question regarding aileron control. I am confused whether to use two servos or a single servo. What are the pros and cons? Is it tough to program two different servos? Will two servos give me more control?

Monoblock Build:

Finally, I couldnt find the  1" or 2" foam in the area, so I used the 12mm foam.

I cut out three pieces of the monoblock and stuck them together using hot glue. I think this will work (Comments?). I also sanded the edges on the monoblock as they were not aligned. As for the motor mount, I read that I am supposed to use a piece of plywood. I am not sure how I'll find or cut it as I have no carpentry tools. Is there any other way to mount the X-shaped motor support directly to the foam, like maybe using 2 cardboard pieces. Will sticking it directly to the foam work?

Any suggestions are welcome.
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« Reply #3 on: April 09, 2012, 12:17:03 PM »
roopeshkrishna
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nice.. you can add the aileron with one servo, or with two.. with one, you can place it near to the centre of wing, and can fix it with drive rods.. and with two, no complications, as one servo can be fixed in opposite to the drving direction.. will give more hold in action.. crispy control..
and must add a piece of plywood, to fix the motor, as a safety matter.. can cut it up, with a junior coping saw, or with a hack saw, is cheaper to buy.. can make a slot vertically, on foam, and can slide the plywwod piece in.. then glue it.. fly nicely..
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