Hello fellas,

wishing you all a very happy new year and fun filled 2014

I have got this Huixin RC plane long back and its like age old, it is a basic RC plane with 3 channel 40mhz tx, but it looks TX is all wore out due to battery leak and even some wire solders are rusted.

Now can i get a good long term tx which can support 40mhz/72mhz and new 2.4ghz i mean kind of all in one so that i can use to try flying this plane if other parts are fine.

Other option is i just use this canopy and use new type of motors / rx etc and build it, i have attached the pics of the plane, request to help me out as i really would like to use this body.

Thanks all in advance...

I think this is a toy grade plane with 2 channel radio. This is hard to modify it, very small. you can only use same radio with it,,,, you should repair the radio if you can.... and fly it....
http://www.trendtimes.com/minircairplane.html

Is there any radio which can support 40mhz, or any way of using other 40mhz wth this plane

hello can u just post a few pics of tx and rx? ill try to help you

If you are getting a new radio these days, do NOT consider anything other than 2.4GHz.  The Mhz radios are major pains.

http://www.rcindia.org/radios-and-receivers/why-fm-radios-(72mhz-etc)-are-not-a-good-idea-any-more/msg4116/#msg4116

@ Kiran, shall post the pics tonite..

@ Anwar, I have other tx which is of heli but 40mhz, how can I use it for plane, any kind if adjustment on plan board for signals ?


Thanks

Hello if u hav aheli tx, is it a coaxial heli? Then it is possible.post the heli rx pics too.you will be having 2 outputs for 2 motors and one more for back tail motor.there r 2 motors in ur plane.connect 2 outputs from ur rx to the 2 motors.and 1 more output u have, connect it to ur plane's rudder. power the rx with 500-1000mah 2cell lipo.try to keep the rx antenna a bit long as it is 40mhz and not 2.4ghz.this setup is simple and tried it too!

Can't say anything without seeing what you have. Can you identify the model and point to a pic/link on the web ?

See the pic.

Hi,

Have attached the plane's RX and TX pic

Hello cant make out by seeing th pics.looks fine .u said u have a heli tx then do u have the rx too?if u have the heli rx please post the pic.lets try to fix a heli rx into it!

Can't see this being worth the effort, with the motor mixing and only 3 channels. 

Getting a proper (even if simple) 2.4Ghz radio (of 4 channels at least) would be the right thing to do, especially if you are getting into RC for the long term.  They do not cost all that much these days.

Attached is the heli tx

@ Anwar : I dont mind investing in good 2.4ghz radio, as i am also modding my parrot drone for tx, but my just intension here is to make this plane fly...i just dont wanna throw it away...i am ready to take all pains...

Hello friend I asked u whether u have a receiver for the heli tx.if u hav one please tell me and as anwar sir says to get u a 2.4ghz which is the best.but I think the cost will be equal to a new one.2 brushed esc cost 1500rs, tx and rx, lets say fsct6b cost around 3000, sevo cost 200 and lipo cost 500 total cost would be around 5000rs.this is brushed setup, if u want brushless than cost may increase.i say if u have a receiver for the helicopter transmitter then tell me.than it is possible to get this into air!

Finally have invested in turnigy 9xr with orange dsm module as per requirement for my drone mod.

Now I would like to use the plane canopy with new electrics, don't wanna use heli rx and will keep tht aside.

Now on what basis I should decide for motor, servo, esc, rx, if you see my plane body in earlier posted pics, it has 2 motors each on wings, how do I see if it's brushed, based on type if model it is am sure it's brushed, help me to buy electrics..

Help pls

Why don't you remove the toy grade electronics from your plane and put some hobby grade servos , esc , motor

And that way you would be able to use any frequency radio you want .

True that's what am willing to do but need help on selecting servos, esc and motor, if u see pics if my plane there are 2 motors already there each on wings

the toy plane will have brushed motors i guess
same as my toy grade car has
so you will need to change everything servos battery and motor
bring it this sunday so that we know what stuff needs to be changed

We need more info

Your plane seems to be using a TX-RX2B pair which does not support proportional input...its the same radio used in toy cars...you could actually buy one of those 40Mhz radio cars and it should work with your plane as long as the channel matches...

more information on tx2b here...
http://pro-radio.ru/user/uploads/126799.pdf

Well, in fact that is a very cool way of making a plane for kids...must make from an old car...

Hi Girish, as told earlier have invested in turnigy and hence don't mind in changing all elecs, now need help in selecting the right elecs, will post the plan dimensions what else to be checked for selection

Hi , sorry for late reply , was in school till 3 pm and when I came home I was tired , I would suggest that you buy 2 brushed 20 amp Esc for your current motors, 1 costs rs 560 if you are buying it from thehobbyshop , you would have to take out the red cable pin from one of the esc otherwise you're receiver would blow up  , use your 2.4g remote and for the servos use 9g servos , you can get them cheapest from rcb

If you also want to buy a radio , if you're going cheap , you can buy the rcb6i or rcb7x , or if you're going rich , you can buy spectrum radios if you're going to be flying electronic planes or you can buy an all rounder futaba radio if you're going to fly nitro and electronics  . My first 2.4g radio was the rcb7x only , it's very good , but then i upgraded my transmitter to my futaba t8fg super as I am a nitro sport flyer .

Can u tell me the wing span, weight etc of this plane or give me a link of this plane.i will suggest the electronics. 

@girishsarwal sir
The 40mhz tx and rx from toy car does not hav enought range.i hav both the tx and rx (tx2b) from toy car.i think those from toy heli works.do check I hav posed a heli rx pic in this thread.

Hi kiran
I agree the range is about 50ft for the chinese ones but the plane I see seems like a backyard or indoor flier...I can tell u how to get it up and running but the details of the power level is based on the rf circuit inside not the 2b chip.. one will need a higher power tx for that increased range... maybe he will have to hunt for the right model... as a rule of thumb the larger cars like 1:12 scale have better range..

my son has a whte ferrari thats 1:16 scale and it does a 100ft very well.

 the toy heli is a good alternative...but i forsee only one problem. That in the coax types the elevator is a free running motor...our friend will have to somehow mechanically or electronically mod it for the rudder for fixed position movement like a servo...I javent thought on it much but I feel that  will need some thought

there is another thread running that showcases a magnetic actuator for this purpose...an electromechanical conversion


http://www.rcindia.org/self-designed-diy-and-college-projects/magnetic-actuator-(home-made-scratch-build)/msg170030/#new

 

The best would be buying something like the sky surfer plane.the combo would be around rs 5000.

Hi,

Wingspan is 49cms and plane length is 39cms

Have attached the pics of the same, also it has 130mah nimh battery which also i will have to change.

So now suggest me the final elecs, as devang suggested 2 brushed esc of 20amps and 9gm servos

also will need help on how to connect the servos, the tail has come cutting marks given which looks for rudder ...

Thanks all

You can search how to connect servos , etc on google /rc india , I am telling you brushed esc as the motors on your plane would be right for the plane as they are factory installed .

Esc(two required) http://www.sproboticworks.com/others-motor-drivers/others-motor-drivers/turnigy-brushed-20a-speed-controller.html
Servo ( two required) http://aeroworks.co.in/store/index.php?id_product=107&controller=product
Battery http://aeroworks.co.in/store/index.php?id_product=78&controller=product

Man , according to my 2 nd post , The esc from aero works is rs 20 less but the shipping would cost more as aero works is in chennai and thehobbyshop is in Pune , the servos from rcbazaar cost only rs 199 and the battery is completely wrong for the setup I recommended , you will require a 11.1 v 500-1000 mah 3 cell lipo battery , you can get it cheapest from rcbazaar as well and as ghost rider lives in Mumbai the shipment would arrive very soon as the latest branch of rcbazaar is in pune

So the better links for cheapest stuff are -

ESC - http://thehobbyshop.in/index.php?main_page=product_info&cPath=34_36&products_id=125

Servo - http://www.rcbazaar.com/products/794-avionic-av9a-9g-servo.aspx

Battery ( please choose the battery that you think is best And is between 500 to 1000 mah , and the voltage is 11.1 or 7.4 v  ) - http://www.rcbazaar.com/category/71-batteries-lipo-safe-bags.aspx?pageindex=2

From the starting I had thought about the setup and then I had posted it , please don't just write any setup you think will work , I don't mean to hurt anybody , I just want ghost rider to have the best setup

Here's some building steps for your plane's modification , first of all choose any one of the esc and hold its signal wire ( the wire which goes into the receiver ) and with the help of any small sharp thing ex a pen , pull the blck small plastic piece which holds the red wire towards you , don't break it after bending it , pull the red wire and it should come out with the pin , then tape it so that it doesn't touch anything , we are doing this so that when you plug both the esc together the receiver doesn't blow up as it will not receive electricity from both the esc . You can glue the servos or screw them inside your planes fuselage , then you will need to make your plane's control surfaces , so first of all cut the the rudder and elevator exactly to the line marked on the model , to rejoin it , we will use some paper hinges , just cut 2 small holes on the rudder's hinge line , now glue the hinges on the rudder , now fit the rudder on your rudder's frontline , the line which is still on the plane , mark the place where you want your rudder to fit , then cut the holes and glue the hinge the left over hinge of your rudder to your frontline , now your rudder would look exactly the same as before but you would be able to turn it left and right , now do exactly the same process for your elevator

To connect your servos to your control surfaces , you will need some stuff , first of all use a pom horn or any other horn and glue it or screw it on your plane's control surface , then connect a rod to a Cleve's , repeat the process on your other end of the rod , now connect one clevis to your horn and another to your servo , repeat the process for all your other control surfaces .

Now here's the boring part , you will have to solder both your esc input power cables together , solder both the red cables together and the black cables together , after that you can solder any of the power connector to your cable . For the motors , cut the old wires and solder some new wires , use 3.5 mm female bullet connectors on the end of your motor cables , now also use 3.5 mm male connectors on your esc . Now your soldering work is finished .

To check the rotation of the motors , just plug the esc together and programme your remote for two throttle signals or use your y cable . Just connect both the wires from one your motor to a esc and repeat the process , give a 10 % throttle and check the direction of your motor , if the direction is wrong , just revers the cables of that particular motor , then if everything is right , then your motor system is ready

Now it's time to check your servos , just connect the cable of your servo to your receiver , then turn the system on , and check the system , if anything is working in the wrong direction , just reverse the servos from your remote , everything from reversing your servos to to connecting the electronics should be in your manual for your transmitter

Now everything is finished , we just have to tuck it in , mount your esc on your wing , in any position you want it to be with the help of some double sided tape , put the battery in your fuselage , in a place where the cg is right , mount your receiver in your fuselage and connect the servos and the esc , now turn on everything and final test it . NOW YOU CAN FLY YOUR PLANE

Some stuff you will also need -

Paper hinges - http://www.rcbazaar.com/products/1716-super-light-pivot-round-hinges-d3w10l48mm.aspx

Silicone cable - http://thehobbyshop.in/index.php?
main_page=product_info&cPath=44_91&products_id=266

Pom horns - http://thehobbyshop.in/index.php?main_page=product_info&cPath=41_43&products_id=270

Clevis - http://thehobbyshop.in/index.php?main_page=product_info&cPath=41_43&products_id=277

Control rod - http://thehobbyshop.in/index.php?main_page=product_info&cPath=41_43&products_id=22

3.5 mm bullet connector - http://thehobbyshop.in/index.php?main_page=product_info&cPath=44_45&products_id=203

Heat shrink tube -http://thehobbyshop.in/index.php?main_page=product_info&cPath=44_91&products_id=288

If you need anything else or having problem in anything , just post it on your topic and I will reply to it ASAP

Hello devangflyer I just gave him an idea of electronics. He can do some research for the electronics.

what is the original battery size.ghostrider told its only 150mah.how many cells? And  its a a nimh battery.

9grams servo may be heavy for this model.i think 5gram would be better because the total weight may be around 200-250 grams.again we need to know the , motor size.i feel 3cell would be to much power.these are brushed motor.they r only 6v.11.1volt may burn the motors.2 cell 350-500mah would work the best .he must keep the weight as much low as possible.

No, the 9 g servos would be fine for this plane as  I have used them in my smallest build , which's wing size is about 20 inch and have sufficient power so that when the plane is in the sky , the air would not be able to bend the control surfaces .

I'm recommending a 3 cell 500 mah to 1000 mah battery because the two esc + servos are going to need at least 400 mah for 3 mins flying time

About the battery , I guess we will have to wait for ghost rider's reply , but anyway the link that I have given him has both 7.4 and 11.1 v battery's , so don't post it again.

I am concerned there is not enough math carried out including parameters like target auw. ..wouldnt it be much definitve to work back from a target auw. The plane has a wing area barely 300sqcm...Maybe I am missing something

@ Girishwal , can you do the math ?  , I was never good in maths , had got 18 out of 20 in my last unit test  .

I stirred the pot expecting you'd search for it, but since you haven't, here's a starting point, which I've learnt from very experienced aeromodellers (not just fliers)

1. Understand what you wish your plane to do (fly level, toss around, do high alpha flights, 3d?)
2. Estimate a target weight that you wish to put in air (incl airframe, electronics, mechanical parts)
3. Have a rough estimate for how much power you need to make your plane fly as per 1 (trainer ~75w/kg, sports ~100w/kg, acrobat ~120w/kg, 3d ~150w/kg) - I am comfortable with these, to each his own empirical values
4. Divide by the avg voltage of your battery to get max current required.
5. Determine the wing area of the plane
6. Estimate a wing loading (works in tandem with 1)
7. Determine the stall speed of the plane
8. Multiply the speed by atleast a factor of 3 for those emergency situations
9. Plug in fluid motion formulae (with reynods number ~1) to arrive at approximate thrust required
10. Understand the pitch of your propeller to know how fast will your plane fly (convert that inch/rev to km/hr) and what RPM will be required
11. Know what is the propeller efficiency and what is the motor efficiency. multiply by Eta/100 to get actual power
12. Divide the RPM by the avg voltage of your battery to arrive at approximate Motor Kv.
13. Consult motor/prop specs that works in the ranges arrived at by 7, 10, 11 and ESC rating by 4
14. Repeat and double check

This is by no means exhaustive but helps get into air with some predictability. Each item above is a discipline in itself so here's something to ease out:

http://flbeagle.rchomepage.com/software/webocalc_1.7.6/webocalc.html

PS:
Here's something that will ensure you get more time for your math exams and a higher predictability of a 20/20 score

http://en.wikipedia.org/wiki/Indian_mathematics#Vedic_period

I can only get it till point no. 6 as it's far from what I have learned till now . Can you do the maths ?

I do feel you misunderstood my point...GhostRider has not mentioned how much is the weight he wants to put in air, the lighter the better, he mentions only wingspan... and we nowhere speak about AUW. I am not saying the plane will not fly with that setup. it might as well but that's more of a hit and trial...

And here is a sample calculation

Assuming
1. You need a trainer model (Kt = 0.75 - empirical)
2. Target weight = 1000g
3. I use about 75 w(75w/kg for level flying)
4. keeping in mind prop and motor efficiency (0.75 * 0.75) you need about 130W
5. avg lipo voltage on 3s is 10v, you need something that can do atleast 13A, in practice you will need about 20A for safety
6. The wing loading is (1000g/0.24sqm) about 4133g/sqm = 4.166 kg/sqm = 40.8 N/sqm
7. Lift = weight for level flight; Lift = 1/2 cl rho v2 s => v = sq((2 * Lift)/rho x cl); rho = 1.25, cl = 1 air; => v = 8 m/s (stall speed)
8. going in at about 3 times this value for max speed = 24 m/s, thrust is Newton weight * max speed * Kt (0.75) = 18 => max thrust = 18 * 24 ~ 432 N
9. Vmax being 24 m/s ~ 960 in/s = 57600 in/min; divide this by prop pitch for rpm required, on a 7 in ch prop approx 8000 rpm, divide this by avg voltage (10v on 3s) => ~800 Kv

The weight including electronics would not be more then 250grams.the original battery is 6v 150mah which weighs around 30gram.and 7.4 500mah lipo weighs 37grams.adding bigger battery will be better but this is a toy plane.it has brushed motors.if it was brushless I would suggest to use bigger battery. He has similer plane to this http://www.trendtimes.com/minircairplane.html

@ girishsarwal I have made 5 scratch build planes with just a hit on elects and all of them flew

@Kiranrc I guess you are right about the battery , then 7.4 v it is ( mah should be chosen by Ghostrider )

@ Kiranrc the link that you have given shows a plane which looks similar but wingspan , weight , length doesn't match the wingspan , weight , length which Ghostrider gave us.

Yes it has 6v motors, I think 2S 500mah 10c is enough and 5 g servos. I have flown this kind of plane with original setup without landing gear, with 1S 200mah lipo, the flying time was 5 minute.

@ayub he's using 9g servos

9 gram servo is heavy, I used 9 gram on my 50" sbach342 and a cessna 61"
anyway 9g can also work but this is a small plane, I think 18 or 20" span

Well I'm recommending 9g because I have used them in my smallest build which's wingspan is 20 inch and this plane's wingspan is 30 inch

And my build had 4 servos ( 2 aileron , 1 elevator and 1 rudder ) whereas this plane will need 2 servos only

Devangflyer 5 grams servo would be sufficient.9 grams may not be heavy but it should fit in planes fuselage.9 grams have bigger control arm.they take much space inside the fuselage.scratch built is different as u can place them anywhere.here u need to fit all the electronics in tiny space.

Okay Okay , didn't hink about that