How to start
Thank you for your interest in Kraga models.
Although one of the main goals was to create design which is printable on every printer, it may happen that your software or printer is not able to print it. It is very important to start with the printing of a test part. You can find link to it on every plane detail page.
After you printed the test part, you can proceed to purchase using PayPal or credit card. All your plans and detailed build guide are availabe for download under my account section. Then you can print your plane, assembly it, cover it with covering foil, install electronics and finally enjoy flying. In following chapters you can find high level overview.
How to print
There are two kinds of parts:
one that has to be printed as shell (wings - left image) - 0% infill and no horizontal surfaces (thickness of the shell is one layer). Only this way you can achieve required weight of the plane.
Second kind should be printed as solid (fuse and accessories - right picture). This is common way of printing objects and these parts should be printable on every printer.
Because we are not printing horizontal surfaces there are small gaps in mesh X crossings. This is perfectly normal.
You can use any material you like, the limitation is high temperature from the iron when covering assembled parts. Heat from the iron can deform the parts. Although I was not able to damage any parts and I tried to cover with foil many materials (ABS, PLA ...), please test film covering on you testing part as you may use different material than I do.
One of the goals when designing KRAGA models is to use minimal or no support during printing. Removing support after printing is big pain and you can easily destroy your part. That is the reason why you should use default orientation of all parts during printing. There are only two parts from whole plane which require support, these are from plane fuselage and are printed as solid. The rest of the plane should be support-free.
Nozzle: 0.4 mm
Layer thickness: 0.19 mm
Check out printing settings shared by others.
How to get carbon spars
Best way is to visit some local RC shop nearby.
If that is not an option for you, here are some online shop links:
How to assembly
Assembly is very easy and fast similar to stringing needle to a thread.
To assembly the plane you have to glue together parts that you printed out and parts that you bought separately
(carbon spars, hinges - they are not included as part of the sold product). Whole assembly process is described in higher detail in a build guide
which can be downloaded on plane detail page. Another option is to watch assembly guide video.
How to cover
There is nothing special about covering 3D printed planes. It is done the same way as you would do with common balsa RC plane.
It is important to test film covering on testing part before you start.
If you have no experience with film covering my advice is to try more brands of covering film before you get frustrated. It is easier to work with some than with other. I tested couple of brands and in my opinion Solarfilm Lite is the best option for 3D printed planes from Kraga. Other good options (which I did not test myself) should be AeroLITE rolls and Coverite 21st Century Microlite.