General Assembly Instructions
Thank you, for purchasing this Stevens AeroModel
RingRat™250
. A design inspired by the joy of flying.
This model has been developed and manufactured using state of the art CAD/CAM systems and features
a unique interlocking construction process that, when compared to traditional methods found in other
model aircraft kits, save countless hours of measuring, cutting, sanding, and fitting. We are certain that
you’ll find our kit to offer a truly exceptional build experience. As this kit is recommended for the novice
model builder and “pilot”; we invite absolute beginners to correspond with us, or to seek the help of
another seasoned builder. At any time should one run across a term or technique that is foreign please
don’t hesitate to contact our staff with your questions.
READ THIS
Please
READ
and
RE-READ
these instructions along with any other included documentation prior to
starting your build and or contacting our staff for builder support.
Pre-sanding
Do not skip this step. Prior to removing any parts from the laser cut sheet wood use a sanding block
loaded with 250-400 grit paper and lightly sand the back side of each sheet of wood. This step removes
any residue produced as a result of the laser cutting process and, as we have found that most stock wood
sizes run several thousandths of an inch over sized, slightly reduces the thickness of each sheet.
Leave your pre-sanded parts in the sheet until required in the assembly process.
Protecting your worktable
Use the poly tube that this kit was shipped in as a non-stick barrier between your worktable and the
product assembly. Promptly clean up any epoxy spills with rubbing alcohol and a disposable towel.
Bonding the assembly
As this product tabs, notches, and otherwise interlocks like a 3D puzzle we suggest that when fitting parts
you dry fit (use no glue) the parts together first. It’s advised to work 1-2 steps ahead in the instructions
using this dry-fit technique which allows ample opportunity to inspect the fit and location of assembled
components and realizes a benefit as each successive part contributes to pulling the entire assembly
square. Once you arrive at the end of a major assembly step(s) square your work on top of a flat building
table and revisit the dry fit joints with glue. Using the dry-fit process you’ll be able to recover from a minor
build mistake and will ultimately end up with a more square and true assembly.
Unless otherwise noted in the instructions, always use medium CA glue for bonding parts.
Never force the fit!
Remember this is a precision cut kit. Our machines cut to within 1 thousandth of an inch in accuracy,
Yet the wood stock supplied by the mill may vary in thickness by up to 20 thousandths. This variance in
the wood stock can cause some tabs/notches to fit very tight. Hey, dad always said it was easier to take
away material than add it back. With this in mind, should you find a joint or two to fit rather snug consider
lightly sanding a tight fitting tab rather than crushing and forcing your parts together. You’ll break fewer
parts in assembly and will end up with a more square and true assembly.
RingRat 250 © 2010 Stevens AeroModel all rights reserved.
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