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Centering the Sub-Trim Debate: An In-Depth Analysis by Earl Haury

Various opinions exist as to how subtrims affect servo travel, especially when used with dual servos on elevators. This discussion shows data that can help understand subtrims. While the measuring equipment was setup I made a few more measurement to satisfy my curiosity. A comparison of the performance of old with new servos, trim effect, […]

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LiPo Battery Anatomy, Fire Behavior, and Safe Practices

Most of us who use LiPo batteries recognize that there’s some risk involved. The things have been overcharged, shorted, cut, nailed, etc. in numerous U-Tube videos that dramatically demonstrate the potential to make smoke and fire. There are also a variety of methods offered to minimize risk and manage a fire, with some being better […]

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Sbus Worth the Fuss?

The typical discussion for using Sbus revolves around reducing wiring clutter and usually moves toward a discussion of individual servo leads providing some redundancy advantage over a single lead for a bunch of servos. A reasonable discussion, as far as it goes. Are there other reasons to use Sbus, especially in a pattern airplane? Probably. […]

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Measuring Incidence Angles and CG Location

We often refer to incidence angles, CG location, and control travels with respect to our pattern airplanes, but just how accurate are the numbers? Does it even matter? We each may have different criteria for making these measurements. Sometimes it’s just for initial set-up to the designer’s specs, or maybe for future reference as we […]

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Throttle Tech Add-On (Modeling Ingenuity at its Best)

The Throttle-Tech is primarily a device to ensure constant performance throughout a pattern flight with E power. A secondary benefit is its notification of battery status. Ever try to fly a sequence with a discharged pack? The T-T can help prevent that. There are two LED’s on the circuit board, a green and an orange. […]

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Electric Allure Build Guide and Evaluation

Earl Haury has gotten his hands on his brand new electric Allure and put together this fantastic build guide/evaluation. Click below to download the PDF and read on!

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Anatomy of a Snap Roll

I love reading everything that Earl writes because it’s so thorough and informative. He does an excellent job explaining the physics behind a snap and how we can use that knowledge to inform our methods for trimming and flying the maneuver. The next time you get in a debate with your fellow pattern fliers about any aspect of a snap roll you know where to go!

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Earl Discusses Air Density and Pattern

Have you noticed that some days your airplane has more or less power than others? That it’s more or less responsive? The variable property causing this is air density. Full scale pilots are very aware of air density, expressed as Density Altitude (DA), and its effect on aircraft performance. Low DA provides good performance in […]

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Tech-Aero Designs Throttle-Tech

Guest author Earl Haury tells us about a great product from Tech-Aero Designs, the Throttle-Tech. This nifty device makes it possible to have consistent power output from your electric airplanes throughout the entire flight. Earl uses his great technical mind to go in-depth into the principle behind which this device works and talk about what to expect when using it. He also offers suggestions for settings that have worked for him. A great read (even for a YS guy).

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Guest Author Earl Haury: Essential Tools

There’s an old saying that “A craftsman is only as good as his tools”. That’s certainly true for precision flying, and applies equally to all forms of modeling. One is not likely to win any model meet, or just enjoy a day of recreational flying, without frustrations if using poor equipment. Good quality airplanes don’t just happen, they’re built that way. It doesn’t matter much if they’re scratch built or an ARF, either must be built properly. This requires the use of the proper tools.

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