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Nov 09, 2019, 03:05 PM
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ValueHobby J 3 Cub 40


Purchased a ValueHobby J 3 Cub 40, pleased with the quality, strong build ARF.
Poor instructions for a new builder.

Looking for a "Build Thread" Links, any help would be appreciated.
Thank you in advance.
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Nov 09, 2019, 06:32 PM
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Not much here
https://www.rcgroups.com/forums/show...ecifically-J-3
Nov 09, 2019, 10:08 PM
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Tower Hobby - Phoenix Model Piper Cub. Instructions.

https://www.towerhobbies.com/manuals...705_manual.pdf

The build is not the same, but is similar.
Last edited by atr98; Nov 09, 2019 at 10:19 PM.
Nov 14, 2019, 10:48 PM
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J3 Cub build.....ARF


Just a picture of the fuselage.......illuminated with a flashlight.
Looks like a fun project, if I ever get started ?
Nov 14, 2019, 10:52 PM
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Unable to post photos ? ? ?


I use to be able tp post photographs..........What did I do wrong ?'
Last edited by atr98; Nov 14, 2019 at 11:48 PM.
Nov 15, 2019, 09:24 PM
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sirpercy's Avatar
Did you see the pdf manual on the website page.
Nov 16, 2019, 01:03 PM
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Value Hobby J3 Cub Manual


http://www.valuehobby.com/media/wysi.../Manual/J3.pdf

The instructions are weak, not for new builders.
I have many questions.
Does the motor need to be realigned ? 3 degrees right and a few degrees of "Down Thrust"
The manual calls for a 15in prop, I'm guessing that is a little too large? Maybe 13 inch ?
Tips and Tricks for weak points, Balancing issues in the build ?
Last edited by atr98; Nov 16, 2019 at 01:14 PM.
Nov 16, 2019, 01:18 PM
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This is a very inexpensive model..........$105
Guessing a few have completed this ARF.......
Hope to find someone willing to share their experiences.
Nov 18, 2019, 07:06 AM
So many planes, so little time
USMA82's Avatar
I can share my experiences, but you may not want to hear them! I bought the big Aviator Pro from ValueHobby, and had a wonderful experience. Great flying plane that was actually my introduction to balsa models.

Then, I made the mistake of buying the J3 Cub...

The thing was a complete nightmare to fly. I had every one of our local experts try to fix that plane - including some national (Top Gun) champions - and no one could fix it. We tried adjusting the thrust angle, adjusting the CG, etc., etc., etc.

I wish you the best of luck on yours, but I ended up selling mine at a local RC auction with a sign that read, "Looks great, flies like crap."

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Nov 18, 2019, 02:17 PM
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USMA82 - Thank you for your input. I have many questions, hope you answer a few

Planning electric. PROPDRIVE v2 4248 or PROPDRIVE v2 3548
with 13 to 15 inch prop..............What power system did you use ?

How many flights did you get ?
Wing loading looks high.........Guess you had to fly fast, prevent stalls or loss of control.

Thought of stripping off the covering, drilling a lot of holes, sanding, reduce weight ?

The Big Aviator Pro, 101 inches looks nice, and if flys good, it might possible.
Which power system did you use for the Aviator Pro ? Thank you.
Nov 18, 2019, 05:43 PM
So many planes, so little time
USMA82's Avatar
I'm afraid we're talking ancient history from five years ago. I've been through about 60 planes or more since then. At 6 pounds or so, any 32-size motor should work well. As long as you can generate at least 100 watts per pound, you've got more than enough power.

I think the J3 had a total of 5 or 6 flights, and after that I gave up. Every other cub I've had since that one has been great - slow flying, stable and fun to fly. The absolute best (and I still have it) is the Hangar 9 Carbon Cub 15cc - excellent, excellent, excellent bird.

It never hurts to reduce overall weight, but I don't think I would go to the trouble. It's up to you. For all I know, they've made major changes to the design since I bought it, so your results might be much better.

The Aviator I had was the 77-inch wingspan Aviator Pro 60. I don't think they offer that one any more. I used a 5055 size motor from Hobbyking, with a 4S battery. More than enough power. I'd still be flying that plane if it weren't for the tree top that got in the way one day....

Good luck!

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Nov 22, 2019, 01:12 AM
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USMA82, I am grateful for you help.
A little disappointed in my decision to buy this.........

You are correct, Value Hobby no longer offers the smaller Aviator Pro 60.

I love airplanes like the 2 meter, powered glider, Spectra or Spirit...........Slow easy flying.
Light wing loading, relaxing.

When I finish this, will post pics or vids.
Stall in take off ?
Or if I remember, forward elevator, until a safe speed is obtained, prior to rotation.
Again, thank you for your help.
Last edited by atr98; Nov 22, 2019 at 01:13 AM. Reason: Lack of proof reading.


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