One of the aims here at Small Flying Arts
is to present modelers with useful tools in an organized, easy
to use format. This article describes the tools you’ll
find here, what they do, and how they can help you. Should you
need additional help, I encourage you to seek it in the SFA
Discussion Forum.
10-Step Trimming Guide
Okay, so you’ve finally finished that model
and you’re basking in a warm glow. You built carefully
and covered well. The airplane looks really sharp, and you’re
happy with yourself for a job well done. Well, sorry, but if
you ever want that model to fly then you’re only about
half-finished.
There are a few models that will fly right off the board, but
for most projects you’ll have to put some work into flight
trimming. Adjusting for flight can be a touchy and hazardous
operation, and your warm, fuzzy feelings might turn sour if
your new ship “re-kits” itself!
Fortunately, John Koptonak has simplified the task in his 10
Step Trimming Guide. Widely acclaimed in the Free Flight
community as an authoritative source, this guide almost guarantees
your success. You start by making your model an efficient and
stable glider before adding any power. Once that’s accomplished
you’ll concentrate on thrustline adjustments to trim with
power. All the “how-to” details are clearly presented
in this document. No flight box should be without this helpful
tool.
Balsa ID Chart
In this modern age of foam and composites, balsa wood still
offers one of the best structural materials for small flying
models. It’s extremely versatile. Unlike those more modern
substitutes the structural properties of balsa can vary widely
from piece to piece, depending on the wood density and how it
was cut from the tree. Experienced builders leverage these variables
to produce strong, light models that fly well.
The Balsa ID Chart
illustrates the three types of cuts and how to identify them
by grain patterns in the wood. It also specifically describes
how to use each type in a model airplane, as well as what to
avoid. This understanding is an important foundation to advancement
in building skills.
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