J-3 Laser cut kit 1180mm Wingspan

by gcok2010 | October 16, 2017 | (6) Posted in Reviews

Starting with unboxing and looking what is inside:




Link to product:

Banggood: https://goo.gl/cn1B2P

Hobbyking: https://hobbyking.com/en_us/j-3-laser-cut-kit-1180mm-inc-glazing-cowl-kit-v2.html?___store=en_us


Time to start the build.

As I have mentioned in the unboxing video, manual provided with the kit is from completely different model. Some parts are similar but some are not.

Luckily, I have found, let's say, correct manual, at least 90% correct on Banggood site.

And one big help is forums and pictures from other builders around the world:

https://www.rcgroups.com/forums/showthread.php?2302318-HK-laser-cut-kit-cub-1180mm-build 

https://www.wattflyer.com/forums/showthread.php?t=70695 

Fuselage is very easy, nothing here that you need to worry about, just follow manual from Banngood, and take your time.

I used CA glue and Wood glue for the whole airplane.



Now comes the wing. Boy that gave me headache, both manuals have different types of ribs than provided in the kit. BEWARE .... there are 3 different ribs in this and they are not too clear about this ... the centre rib is the shorter of all ... This is one rib per wing at centre (where 2 wings join together).
Then comes the next 3 ribs that has NO inset into the trailing edge to sheet!! Then #3 rib and all out to end are ribs with the cut out both sides of trailing edge to allow sheeting. Any yes, there are 6 ribs more than you actually need.


After sheeting the wing with provided balsa parts, you need to cut out aileron controls and hinge them with CA hinges provided in the kit.

Horizontal and vertical stabilisers are pre made, and yll you need to do is cover them.

So let's start with covering. I was planning to cover it all with yellow transparent covering film, but after finishing the main wings, I have realised that I don't have enough of yellow covering film. So the fuselage is covered with red transparent film which proved to be better solution when plane is in the air due to better visibility.


To join the wings, there are 2 wing joiners, glue them together and make a slot on first wing rib between wing spars. it fits perfectly. Glue the wings together with wood glue or 5 min epoxy.

Test fit:

Covering  the fuselage:

Now it's time to install all electronics and put everything together:


I have used acrylic spray paint to paint the cowling FROM THE INSIDE to keep it nice and shiny.


Final pictures:



Maiden flight

Nice sunny day, a bit windy, but I had to do it. 




COMMENTS

NCC1701 on June 12, 2019
Awesome!! Just bought this kit.
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MarkPrima on September 3, 2019
What size 2-stroke glow engine would you recommend for this plane?
And maybe a 4-stroke glow engine?

Thanks
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gcok2010 on September 4, 2019
Hi, I wouldn't know, I use only electric setups on my planes and never had gas or glow engine.
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J-3 Laser cut kit 1180mm Wingspan