Align T-Rex 450

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A line of electric helicopters made by Align, the T-Rex 450 was arguably the helicopter that made both electric and miniature helicopters popular. There are several variants of the Align T-Rex 450 helicopter.

[edit] Model Summary

  • T-Rex 450X (discontinued)
Original version with plastic frame and head.
  • T-Rex 450XL (discontinued)
Version of the original T-Rex with a longer boom, allowing it to run longer main blades. The original could be converted to the XL with the 'stretch kit'. The XL came in two variants, the HDE with mechanical mixing, and the CDE with electronic CCPM mixing. All subsequent T-Rexes have used electronic CCPM mixing.
Upgraded version of the T-Rex 450XL, with a carbon fibre frame and alloy head and tail.
  • T-Rex 450SA (discontinued)
Preassembled, downgraded version of the Trex 450 SE, with alumninm frame, but a mostly plastic head. Limited availability.
  • T-Rex 450S (discontinued)
Downgraded version of the T-Rex 450SE with carbon fibre or aluminum frame, but a mostly plastic head. Similar to the T-rex 450SA, but supplied in kit form.
Newer version of the original SE, with carbon frames and alloy bling.
A newer version of Align's T-Rex 450 line of helicopters featuring a torque tube driven tail, new frame and head design and a new tail design including Chinese weights.
  • T-Rex 450 Sport (discontinued)
The cheaper model in the 450 range. Each side of the frame is made of two plates instead of one. Considered to slightly reduce stiffness.
  • T-Rex 450 Plus (discontinued)
Similar to (and shares many parts with) the 450 Sport
  • T-Rex 450 Sport V2
  • T-Rex 450 pro V2
An update of the 450 Pro.
  • T-Rex 450L Dominator
A high end model, featuring a 6S setup, DFC head and frame reinforcements, among other features.

[edit] History

The first incarnation of the T-Rex 450 was the 450X, which was comprised mainly of plastic and was available with an "HDE" (mechanically mixed) rotor head. The T-Rex 450X was upgraded to a version 2 (V2) which was largely identical to the original model but included some additional bearings and repackaging. Align released a series of blue anodized aluminum upgrade parts for the V2 and these were the basis for the later (and evolved) SE model - see below.

The 450XL model, nearly identical to the 450X mechanically, was equipped with a longer tail boom which would eventually become the standard for future T-Rex 450 models. It also came in two versions, one with HDE (with mechanical mixing) and one with CDE (CCPM) rotor head. Another difference with the XL models was an apparent change in the plastics used for the frame and mechanical parts - the mixing levers and flybar mechanism. These were now released in a black plastic (rather than the grey plastic used in the initial models) and were apparently more robust and (possibly) more precisely constructed, resulting in better crash resilience and less slop in the control structures.

Align later released their flagship model, the 450SE. Based on the T-Rex XL, the SE was equipped with a carbon fiber frame, along with many blue-anodized aluminum upgrade parts. It also featured direct servo-to-swash CCPM-mixing, eliminating much of the slop from the bellcranks in the older versions. The "kit" comes about 80% assembled. During the life of the SE there were several incremental changes that lead to problems as some people (including dealers) were calling the upgraded kits V2, then Align came out with an official V2. So the updated SE kits were called V1.5 kits. Some of the changes over the SE lifespan included the tail hub, tail pitch pushrod, washout block, seesaw, main and tail drive gears. Later kits came with the 430L (3550 Kv) motor and the 35G, 35 amp electronic speed control. Earlier models came with the 420L and a 25 amp electronic speed control.

Align followed with the 450SA model, an ARF version; this model was a cheaper version using the same layout with as the SE, but with aluminum frames and the most of the CNC aluminum parts are replaced by plastic. This model is only sold in North America and is distributed by Horizon Hobby.

Align eventually produced the T-Rex 450S, which is a kit (semi assembled like the SE) based on the SA that was available worldwide. The S was available with an aluminum or carbon fiber frame.

Align made an official V2 (Version 2) of the SE featuring several notable improvements. The new frame mounts the gyro underneath the tail boom for added protection, and includes a new, more powerful motor (430XL) and an improved electronic speed controller. Additionally, the V2 features several updated parts including the rotor head, tail assembly, and servo mount. They added thrust bearings to the main grips and increased the spindle shaft to 4mm thick. The anodizing is a deeper blue, and the frames are modified. Also came with the 430XL (3700 Kv) higher output motor and the 35X, 35 amp ESC that supplies 6 volts to the electronics.

The latest version is the 450S GF version, which is an S with fiber glass frames instead of carbon fiber or aluminum.

The electronics included with the T-Rex kits have also evolved alongside the mechanical characteristics of the model. The initial 400S (short can) and 400L motors have been replaced by increasingly powerful and more efficient motors including the 420L series (XL and early SE), the 430L series (SE models), and the 430 XL (SE V2). Electronic Speed Controllers (ESCs) - the electronic throttle for an electric motor - were also introduced and have evolved thru models that were rated at 25 amps and 35 amps. Additional features such as governor functionality were added to later ESCs.

Align started to offer marketing bundles including motors and ESCs with later T-Rex models.

[edit] External links

Wikipedia logo This page uses content from Wikipedia. The original article was at T-Rex (RC helicopter). The list of authors can be seen in the page history. The text of Wikipedia is available under the GNU Free Documentation License.

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