RC India

RC Models => Electric Planes => Topic started by: rcrcnitesh on October 12, 2013, 10:30:47 AM



Title: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 12, 2013, 10:30:47 AM
hello everyone I took the courage and took the print out of the blubaby 42" kfm3 version now i am going to build the rudder and the elevator first. Then I'll build the wings then the monobloc then the fuselage.


Title: Re: My blubay 42" kfm3 build log.
Post by: RCNeil21 on October 12, 2013, 10:38:47 AM
Why are you going backwards? first build the fuse the wings then tail stabilizers


Title: Re: My blubay 42" kfm3 build log.
Post by: Mjet on October 12, 2013, 10:45:46 AM
at the time of making landing gear , dont follow the traditional build for Blue baby, suggested technique of making landing gear is not OK. you can check my blue baby build log.


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 12, 2013, 11:57:01 AM
thanks mjet


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 12, 2013, 12:06:27 PM
Rc neil I am actually cutting the pieces till now I've cut the elevator and the rudder.


Title: Re: My blubay 42" kfm3 build log.
Post by: Priyum on October 12, 2013, 12:18:47 PM
Please post the pictures of the build progress.


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 12, 2013, 12:28:14 PM
sorry for the poor quality of the pics
till now i have made the rudder and the elevator
the cut outs are of waste quality thinking to sand them down and smoothen them


Title: Re: My blubay 42" kfm3 build log.
Post by: sanjayrai55 on October 12, 2013, 05:45:56 PM
Go for it young man  {:)} {:)} {:)}

All the very very best. BluBaby - great choice!!


Title: Re: My blubay 42" kfm3 build log.
Post by: umayash1 on October 12, 2013, 07:26:43 PM
I Appreciate this, Making the Airplane is much better idea then making threads on the RcIndia..

Good Going :thumbsup: :thumbsup:


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 13, 2013, 10:54:22 AM
hello everyone I am thinking of using this power combo will it be good
motor
http://rcbazaar.com/products/1944-avionic-m223015-kv1780-micro-brushless-motor.aspx (http://rcbazaar.com/products/1944-avionic-m223015-kv1780-micro-brushless-motor.aspx)
prop
http://rcbazaar.com/products/383-slow-fly-propeller-8-x-6-sf.aspx (http://rcbazaar.com/products/383-slow-fly-propeller-8-x-6-sf.aspx)
esc
http://rcbazaar.com/products/806-avionic-20amp.aspx (http://rcbazaar.com/products/806-avionic-20amp.aspx)
battery
http://rcbazaar.com/products/1739-wolfpack-1500mah-25c-74v.aspx (http://rcbazaar.com/products/1739-wolfpack-1500mah-25c-74v.aspx)
or
http://rcbazaar.com/products/1746-wolfpack-1800mah-15c-74v.aspx (http://rcbazaar.com/products/1746-wolfpack-1800mah-15c-74v.aspx)
or
http://rcbazaar.com/products/1738-wolfpack-1300mah-20c-74v.aspx (http://rcbazaar.com/products/1738-wolfpack-1300mah-20c-74v.aspx)
or
battery no. 4, 5 or 6 in this thread
http://www.rcindia.org/for-sale/few-batteries-for-sale-14250/msg156983/#new (http://www.rcindia.org/for-sale/few-batteries-for-sale-14250/msg156983/#new)


servo
http://rcbazaar.com/products/794-avionic-av9a-9g-servo.aspx (http://rcbazaar.com/products/794-avionic-av9a-9g-servo.aspx)
radio
i guess you must be knowing which one




If any other alternative to the elecs please tell me.


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 13, 2013, 11:00:48 AM
Instead of using kfm3 I am going to use kfm2 airfoil
as kfm 3 will make the wing more thick.
so is kfm2 equal to kfm3 in terms of lift produced.

or I should go for other airfoil.

I've made many changes in the plans


Title: Re: Re: My blubay 42" kfm3 build log.
Post by: aniket210696 on October 13, 2013, 01:35:34 PM
follow the plans to the t...! don't change unnecessarily!

Sent from a potato using a lamp


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 13, 2013, 02:39:16 PM
I've changed only for the kfm2 and the slot where the elevator is going to fit in the fuse
please tell me a suitable airfoil


Title: Re: My blubay 42" kfm3 build log.
Post by: aniket210696 on October 13, 2013, 05:10:54 PM
use the kfm3... why change a tried and tested plan???


Title: Re: My blubay 42" kfm3 build log.
Post by: aniket210696 on October 13, 2013, 05:12:52 PM
use a 8*3.8 prop, as specified on the motor specs.... if you use a prop with too much pitch, it can strain and burn the motor...


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 13, 2013, 08:56:50 PM
I have changed because the wings will be too thick then


Title: Re: Re: My blubay 42" kfm3 build log.
Post by: aniket210696 on October 13, 2013, 09:31:57 PM
what thickness material are you using? post some pics...

Sent from a potato using a lamp


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 14, 2013, 09:04:06 AM
10mm thick normal thermocol.


Title: Re: Re: My blubay 42" kfm3 build log.
Post by: aniket210696 on October 14, 2013, 09:11:09 AM
wow.. that's thick
. OK do a thing, make a kf2 aerofoil.

and don't forget to Sand down the whole thing... try to get some thinner thermocol

Sent from a potato using a lamp


Title: Re: My blubay 42" kfm3 build log.
Post by: AnjanBabu on October 14, 2013, 09:27:04 AM
If it's low desity Thermocol, use CF rods for reinforcement and layer it with packing tape for strength.   :thumbsup:


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 14, 2013, 09:33:12 AM
That's what I am going to do anjan bhaiya.
@aniket sanding will make the foam more weak its already weak.


Title: Re: My blubay 42" kfm3 build log.
Post by: AnjanBabu on October 14, 2013, 09:54:50 AM
20mm should be fine for a 42" wingspan. Just sand the leading edge to make it more like a blunt knife edge.


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 14, 2013, 10:01:54 AM
Ok I will surely do it


Title: Re: My blubay 42" kfm3 build log.
Post by: aniket210696 on October 14, 2013, 10:19:20 AM
if you  cant get cf rods, use strips of wood....though they might be a little heavy....


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 14, 2013, 10:24:36 AM
thanks I will use whatever I get
I have doubt will the above mentioned electronics will work perfectly for this plane


Title: Re: My blubay 42" kfm3 build log.
Post by: aniket210696 on October 14, 2013, 10:27:45 AM
read the part about the prop i posted earlier... an 8*6 might be too much for the motor...


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 14, 2013, 10:30:18 AM
this motor can also be used with a 3s so I don't think 8*6 is too much but if it is more then I'll change the prop


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 14, 2013, 10:31:10 AM
Sanjay sir thanks for your inspiring words


Title: Re: My blubay 42" kfm3 build log.
Post by: aniket210696 on October 14, 2013, 10:42:34 AM
why dont you use a emax cf2822, with a 20A ESC, a 10*4.7 prop, and a 1000-1300 mah 3s Lipo?


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 14, 2013, 11:30:00 AM
this was the same setup suggested by another member via pm's but he told to use a 9*4.7 and 850mah lipo


Title: Re: Re: My blubay 42" kfm3 build log.
Post by: aniket210696 on October 14, 2013, 11:43:14 AM
that's good too

Sent from a potato using a lamp


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 14, 2013, 11:50:09 AM
will it produce enough thrust and will i get atleast 10min of flight time with it on variable throttle


Title: Re: My blubay 42" kfm3 build log.
Post by: RCNeil21 on October 14, 2013, 11:51:38 AM
850mah? for a 42" WS? thats a bit low, even a 1300mah 3S is good enough.


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 14, 2013, 11:56:27 AM
yeah that was the same question I asked


Title: Re: Re: My blubay 42" kfm3 build log.
Post by: aniket210696 on October 14, 2013, 12:25:10 PM
though the emax motor generates 700g of thrust... that's more than enough... get a 1500-2200 lipo...

Sent from a potato using a lamp


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 14, 2013, 05:14:46 PM
i started with the monobloc


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 14, 2013, 05:17:45 PM
it is made out of 1.5 mm foam pieces.
i will be going slow for this plane


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 15, 2013, 11:58:30 AM
Hello
should i add ailerons is it neccesary please reply fast.
and I am going to go very fast because before 10 min. I got to know I am going out of station on 18th so Please don't mind if I can't post the whole build log.


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 15, 2013, 01:54:45 PM
plane is getting shape


Title: Re: My blubay 42" kfm3 build log.
Post by: rcrcnitesh on October 15, 2013, 02:00:02 PM
plane is getting shaped