This is an attempt with honest efforts to convert a Guillow's Cessna 180 rubber powered model of 20inch wing span to electric from RCBAZAAR. I'm hoping it doesn't end up as a static model in some show case. I've this doubt because i already feel that it's a little bit too heavy for a model of this size. But anyways, it's a mere attempt so it doesn't matter much.
I started the build about 2 weeks back and there has been some progress.

Electronics:
Brushless Motor 4000kv (From AEW) - 5gms
6A brushess ESC (From AEW) -5gms
3.6gms x 2 servos (From RCB)
3 channel receiver 2.4ghz - 5gms (From THS - Hopefully on the way)
2s lipo 250mAH - 15gms (From AEW)
4x2.5 GWS propeller (Again from AEW)

Well, the AUW of the model is coming upto 70gms, so its heavy. May be, I could lose some weight with a lower mAH battery but that's the best i've come up with. The model itself with tissue, without the electronics was at 29gms which is good in some way. I would like to get some feedback and suggestions from the masters to bring down the weight further. Also, I'm guessing if at all it flies, its gonna be at great speed which mandates an expert skill which i don't have. I'll upload pics of the build progression in sometime:-)

Few pics of the build....

Here is the motor I am going to use and the Tissue dried after spraying water onto it... Ok results...

would love to see it fly during the meet at aizawl

If it flies... ..

Good to see you are so enthusiastic about an 'attempt'.  Really hope it flies.
How are you going to attach the servos and control surfaces?

Swapnil, the wings can be detached from the fuse. In fact i've installed the servos for elevator with control rods, but rudder is still left out. I'm finding some difficulty in uploading few more pics. Let of try again.

Atlast...

Its a way bit powerfull power plant for the model surely and it sure is going to fly well  and too fast. In my opinion since you are flying without aileron restrict throttle to 60% only for maiden attempt.

I don't ve the provision to measure the throttle curve but would 3x3 prop also suffice? I'm guessing it would be ok... 60% throttle would be about 60gms pull with 4x2.5...

By the way I forgot to mention earlier, fantastic built.   

If you have a DR then use 60% for throttle channel through a toggle switch. If not
 just control the throttle input to  60% for first maiden take off attempt and do a long runup. Use same 4 inch prop.

I still remember my initial attempt with a foam model of similar AUW and power setup with full throttle, it was so powerfull that the model looped over and crashed on take off even before I realised it. Then I used a single cell setup with 3A ESC only. I dont know if you have setup of single cell.

Thanks Sundar,.. What single cell setup would you suggest? I thought about 1s but i resorted to 2s because i assumed it would be under powered...moreover i have never used a single cell setup other than those IR based toy helicopters... I just invested on a new low budget 9x radio and need to study the documentation for dual rates which i hope its one of the feature. So at this point i'll settle for what i ve in hand. But i would like to keep my options open to bring down the AUW to the minimum possible.

volume product of 4x2.5 prop= (4*4*2.5)=40 ---Neglecting constant like TT / 4
Volume product of 3x3 prop = 3*3*3=27---Neglecting constant like TT / 4
ratio is 0.675 --Good Judgement

Single servos will be of 1.5gm one. but receivers modules required.

Hi Kalyan,

I am absolutely unsure of what you meant. I'm going to require further explanation on this. I'm sorry if this is a trivial thing but i'm not very fluent in these calculations...

3A ESC

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9667

Brushless 1S Motors

http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=9663

http://www.hobbyking.com/hobbyking/store/__9664__HobbyKing_AP03_4200kv_Brushless_Micro_Motor_3_1g_.html

I am not sure what receiver you have ordered. whether it is 1S Capable.

just a question i had for  long..! does these esc also work as BEC for the receivers...?? or we need a  seperate power for esc..!

was planning to get one of these. and use it  with my corona  72mhz ( plane is a self designed, waiting for electronics once all  in hand then will start  the build...)

If you are looking at reducing the AUW to less than 50gms then these are good options

http://www.hobbyking.com/hobbyking/store/__469__190__-2_2E4ghz_SuperMicro.html

and

http://www.microflight.com/Online-Catalog/Receivers/Micro9-S-4CH-1-1g-Servo-Rx-w-ESC

and servos

http://www.hobbyking.com/hobbyking/store/__11737__HobbyKing_Ultra_Micro_Servo_1_7g_for_3D_Flight_Left_.html
http://www.hobbyking.com/hobbyking/store/__11735__HobbyKing_Ultra_Micro_Servo_1_7g_for_3D_Flight_Right_.html

But of course they are totally new Tx Rx transmission systems

The 3 ESC does not provide a BEC since the very fact that it is a 1S ESC it does not require a BEC ( which usually is 5V for all standard receivers) it runs with only a 1S capable receiver (i.e the receiver can run directly on a 1S lipo supply)

Good build. Hope to see it fly.

BTW we have got some micro servos in store. Will be updating on the site soon.

Sujju

Nice going Gusty sir!! Just curious what is this tissue ? we used to use Tracing paper and then apply dope on that long back... some 'Jet Set' material ?
regarding the motor, isn't 4000kv motor a bit too much ? I used 3800kv motor on Funjet and it was a killer...

Johny
intorc is building it (not very far from where i stay) i watching this thread too, with a lot of interest.

Didn't realize it until Sundaram mentioned it. I'll be limiting to 60% throttle like he said and see how it goes. The rudder setup is almost done with the control rods and i'm adjusting the throws. This radio is good in terms of features. Not sure if i'll using all of it but this is the 1st time i'm using a computer radio and the E.Point cut off is good. Can make nice adjustments.
The tissue is what came with the kit and its almost like the tracing paper. Don't know if its exactly the same but it looks like so. I didn't use dope since i couldn't find it but i used 50-50 fabric glue and water. Did about 2 coats... Gives a good shine and its water proof.

I had this kit 2 yrs back, bought from some mall in Navi Mumbai.

In fact i also wanted to convert it electric, but left it in the middle... was still with me till i shifted to pune last month, didnt get much time to complete it. to strengthen wing i used 2mm square CF bar running from one tip to another, instead of regular balsa strip.
i used feviquick instead of cement provided with it!!!

all the best and keep us updated!!!

Sujju Sir, if only I'd seen it before hand. Anywayz, if my current gear is too heavy, i'll definitly take those micro servos... I thank you again for bringing Guillow's in India:-)

Please post reference link of the receiver you are planning to use. is it with mini or micro JST socket.

I have picked up a Arrow 28" and fairchild 25". however build will commence only after Param returns from Pune in first week Feb.

I picked up planning to use a cox 0.049 glow but its recommended engine is only 0.02 Glow which I realized only after receiving it (which also seems to be way too powerful for the light model).

 

thehobbyshop.in/index.php?main_page=product_info&cPath=2&products_id=42

This is the receiver i plan to use. I'm not sure if its micro or mini jst but i'm guessing the later. Also it states that this receiver is for ground and water, but i read reviews in hobbyking and many have used successfully in airplanes. I also got a fairchild 25" kit. I'm thinking of finishing them both and then go for maiden:-)

Also, i ve no idea about glow engines though i'd like to try it. Very noisy i suppose:-)

The receiver which you are planning to use in not 1S Lipo capable. I also doubt it may be more than 5gms with the plastic casing. It has only normal Servo Connector and does not have the JST socket so you will not be able to use those micro servos suggested and 1S setup. Go ahead with the current setup only by having control over the throttle end point.

Thank you Sundaram for your inputs. With the current setup i think i don't require any kind of modifications with the servo connectors...
For the FairCHILD 25", are you planning for glow or electric? I would like to know your thoughts if you're going to use electric....

Glow 0.049 will be too powerful for both Arrow and Fairchild.

I am planning for electric only. I will use a 4000 KV  3.1 gms brushless/ a geared brushed motor with 5/4" prop on a single cell lipo with plantraco four channel micro JST receiver posted earlier, 3A ESC. With 1.7 gms linier servo two of them.

My target AUW is less than 35 gms. I am planning to use water based ink with spray gun for paint. Which will further keep AUW less with paper provided. I am planning only a fair weather/ indoor model.

Hmm... that receiver is little too pricey for me... Moreover the shipping headaches. Was it ordered from the website directly or some other way? If it was available locally then I would have grabbed it. I saw Sujju referring to some micro servos, hope to see them soon in the website unless its already there. But this 4-channel receiver/ESC you have can be used with any 72Mhz tx or it requires a specialized one?

The four channel receiver was ordered directly from plantraco web site www.microflight.com. It is a 900 Mhz receiver, need its own 900 Mhz plantraco Tx. It has its own built in brushed ESC of 2A capacity and can be used with any brushless ESC. The servos are from hobby king.

If you are planning to use a 72 Mhz Blue Arrow 3 gms four channel receiver is a good bet

Thank you again Sundar for the information. rcforall has the blueArrow receiver in stock. I think i should get one or two if you think its worth.
Also my hopes of maidening the cessna this weekend is fading away because there's still no word from the shipper of the 3 channel reciever. Hopping for atleast an acknowledgment that he has received my payment.

If you are using a 72 Mhz, a Blue arrow micro receiver is a good buy.

I've a 72mhz wfly radio from rcforall bought about almost 2 yrs back. Have been using it  since then. I'll take a look at the bluearrow receiver in next month's budget!.:-)

Anyone has had any experience with thehobbyshop.in from kerela?

Hopefully the Rx was shipped on saturday, or that's atleast what the website says. Its delaying the project. Also i read few negatives about this website although not conclusive as many others have given good comment. May be I'm one of those unlucky ones. All i can do is wait and wait.

Also i've started the balsa skeleton for the Fairchild24. I'm trying to integrate ailerons in this one but read lots of negative comments in other forums about having ailerons in a dihedral high winged planes, but i'm gonna give it a try.

Hello everyone! Guess what! I got the reciever and binding to the fs-th9x was a snap. Used the supplied bind plug and power from ESC to bind it. Did some stick configuration changes to match the 3-channel rx and all looks good. Would it harm to try flying without covering the windows using the transparant shields provided? I'm finding some difficulties in figuring out a way to fit it. The shield stays on the fuse or fix it to the detachable wings? By the way the rx weighs 6gms with the plastic case.