J3 Cub 1:12  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       



All Forums >> RC Airplanes >> "1/2 A" & "1/8 A" airplanes >> J3 Cub 1:12 Page: [1]

Login
Message << Older Topic   Newer Topic >>
J3 Cub 1:12 - 7/3/2008 1:42:54 PM   
Rikard Levenstam


 

Posts: 41
Joined: 3/11/2006
From: Stockholmwww.modellbyggeriet.se/sukhoi, SWEDEN
Status: offline 		Hi,

I´m building a 1:12 J3 Cub and plan to make a laser cut kit for it... For the moment I´m waiting for small servos before maiden flight.....

Wingspan is 780mm and the empty weight is 45 grams, as in Picture, covered with Solite.

3D pdf at http://www.modellbyggeriet.se/cub.pdf




/Rikard

Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize


< Message edited by Rikard Levenstam -- 7/30/2008 11:22:13 AM >
       Post #: 1

RE: J3 Cub 1:12 - 7/3/2008 2:36:10 PM   
av8rsodt



Posts: 370
Joined: 1/16/2003
From: Kernersville, NC, USA
Status: offline 		What motor are you going to use for power?

I have Flyline's .020 J3 Cub plans that were never kitted... would be a neat model to see fly.

Brian

(in reply to Rikard Levenstam)
       Post #: 2

RE: J3 Cub 1:12 - 7/3/2008 2:41:57 PM   
Rikard Levenstam


 

Posts: 41
Joined: 3/11/2006
From: Stockholmwww.modellbyggeriet.se/sukhoi, SWEDEN
Status: offline 		Hello Brian,

The setup is..
Motor
https://www.unitedhobbies.com/UNITEDHOBBIES/store/uh_viewItem.asp?idProduct=5358

Speed Controler
https://www.unitedhobbies.com/UNITEDHOBBIES/store/uh_viewItem.asp?idProduct=4318

Servo
https://www.unitedhobbies.com/UNITEDHOBBIES/store/uh_viewItem.asp?idProduct=3714

Battery
Aboveall 200mAh 2 cell

Reciever
MZK Penta 2.1 gram

Planned takeoff weight is 80-95 grams

Rikard

(in reply to av8rsodt)
       Post #: 3

RE: J3 Cub 1:12 - 7/5/2008 2:24:35 AM   
lildiesel


 

Posts: 478
Joined: 11/18/2005
From: Cincinnati, OH, USA
Status: offline 		At just under 30" span, that is what I'd consider a perfect size for a Pee Wee powered project. And with a laser cut kit there wouldn't be all those little sticks to cut and glue!

< Message edited by lildiesel -- 7/5/2008 2:30:34 AM >

(in reply to Rikard Levenstam)
       Post #: 4

RE: J3 Cub 1:12 - 7/5/2008 3:28:02 AM   
av8rsodt



Posts: 370
Joined: 1/16/2003
From: Kernersville, NC, USA
Status: offline 		Post a video of your Cub flying... can't wait to see it.

Brian

(in reply to lildiesel)
       Post #: 5

RE: J3 Cub 1:12 - 7/27/2008 9:37:57 AM   
Rikard Levenstam


 

Posts: 41
Joined: 3/11/2006
From: Stockholmwww.modellbyggeriet.se/sukhoi, SWEDEN
Status: offline 		Hello Again!

I have now maiden the mini Cub. I have flown it for over ten flights from 4m/s to 0 m/s wind !! It flies extremely slow and nice ! Fligt time with an 200mAh 2c LiPo is over 10 minutes. I am now planning to create a demo video and tried to use the Cam at the same time flying yesterday...not to easy....

The kit is getting closer and there is a web site for the model, in Swedish only for the moment...maybe google translate can help a bit....

http://translate.google.com/translate?u=www.modellbyggeriet.se%2Fcub&hl=sv&ie=UTF8&sl=sv&tl=en

Price for kit is 390 Swedish Krona. About 65 $...

Best regards

Rikard

(in reply to av8rsodt)
       Post #: 6

RE: J3 Cub 1:12 - 7/27/2008 11:22:54 AM   
Mr Cox



Posts: 388
Joined: 7/20/2007
From: Gothenburg, SWEDEN
Status: online 		Yes, I've followed the construction thread of that one on the swedish forum too. Looks really nice!
I'm impressed by the low overall weight too.

I would like to do a conversion too glow though...
A throttled PeeWee or a Peewee in texaco mode would be nice.

(in reply to Rikard Levenstam)
       Post #: 7

RE: J3 Cub 1:12 - 7/27/2008 1:16:47 PM   
Rikard Levenstam


 

Posts: 41
Joined: 3/11/2006
From: Stockholmwww.modellbyggeriet.se/sukhoi, SWEDEN
Status: offline 		Hello Mr cox...

Well, feel free to convert into an oily version, i have some weeks before i get my balsa for production... What is the weight of a small cox? why not fly with electric?



Best regards

Rikard

(in reply to Mr Cox)
       Post #: 8

RE: J3 Cub 1:12 - 7/27/2008 1:51:39 PM   
Mr Cox



Posts: 388
Joined: 7/20/2007
From: Gothenburg, SWEDEN
Status: online 		I don't have the exact numbers in front of me but I think the engine weights about 25g with tank (but without fuel), one will still need a small battery for the RX though, might be another 15-17g. So about 40 grams in total to replace the electric motor and lipo, does that sound doable?

I don't want to pick on people who are into electrics, every one has their thrill or thing, but it is not for me.
Main reason for fuel engines is because that's how it all started I guess, I'm used to it and I like to tinker with engines. It is more scale like and there is an extra thrill when you get an engine to run properly and it flies a model nicely. Electric motors will never have that kind of "soul" to them, as I see it. There is no challenge with electrics (appart from combining the correct components of coarse), if you want power and lightweight it is just a matter of spending more money rather than tuning something by your self to reach an optimum performance with what you have.

So it is simply not for me and I don't own any electric motors at all, but I have plenty of small engines that need a home.

(in reply to Rikard Levenstam)
       Post #: 9

RE: J3 Cub 1:12 - 7/27/2008 3:40:48 PM   
Mr. Mugen



Posts: 5537
Joined: 3/24/2006
From: Ishpeming, MI, USA
Status: online 		Just weighed my peewee .020 without fuel but with a 4.5x2 prop and got 26.7grams.

_____________________________

Everything electronic runs on smoke.....if you let your smoke out, it''s dead! AMA#378033

(in reply to Mr Cox)
       Post #: 10

RE: J3 Cub 1:12 - 7/27/2008 6:33:06 PM   
Rikard Levenstam


 

Posts: 41
Joined: 3/11/2006
From: Stockholmwww.modellbyggeriet.se/sukhoi, SWEDEN
Status: offline 		Hi,

My outrunner is 7 grams, prop 2grams, battery 13 grams and speed controller 6 gram = 28grams and flying weight 83g I think up to 100gram take off is okey, but a little bit quicker..

/Rikard

(in reply to Mr. Mugen)
       Post #: 11

RE: J3 Cub 1:12 - 7/27/2008 8:30:06 PM   
Mr Cox



Posts: 388
Joined: 7/20/2007
From: Gothenburg, SWEDEN
Status: online 		Ok, those numbers are hard to beat, maybe one should use a 0.010 instead then...
How much thrust do you get/need from the electric setup?

(in reply to Rikard Levenstam)
       Post #: 12

RE: J3 Cub 1:12 - 7/28/2008 11:47:59 AM   
Rikard Levenstam


 

Posts: 41
Joined: 3/11/2006
From: Stockholmwww.modellbyggeriet.se/sukhoi, SWEDEN
Status: offline 		Hi,

The motor with the prop i use gives me with "GWS 4025 prop 11,000 rpm, 1.4 amps, ~53gr thrust" But i flies at 1/4 of trottle !! Do not need so much trust ..

I only starts on full power and fly under half all the time !

Hope this helps.

/Rikard

(in reply to Mr Cox)
       Post #: 13

RE: J3 Cub 1:12 - 7/28/2008 12:31:33 PM