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Twinn Rexx FBL upgrade

Posted 08-21-2012 at 11:32 PM by jolyboy
Updated 08-23-2012 at 04:22 AM by jolyboy

The new flybarless module finally arrived yesterday - a new MSH Brain. I spent the last few hours setting it up, and it looks pretty promising so far.

Also, I have the new flybarless heads installed. Below is a picture of how the tandem looks with one of the 450DFC heads installed.



The initial flight was scary due to major pitch oscillations, which were expected. After fiddling...
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Flybarless Twinn Rexx

Posted 08-01-2012 at 07:00 AM by jolyboy

I'm now in the process of upgrading my twinn rexx to flybarless . Reasons for doing so are:
  1. Simplified set-up
  2. Mechanically better (less "slop")
  3. Lighter
  4. Better for use with autopilots in the future
  5. More crash resistent
  6. Ability to run an ultra-low headpeed for FPV flying (no flybar requiring inertia to operate)

I'll be running 2 x Tarot 450DFC heads, with one Tarot ZYX-S flybarless unit fed into a TH-2 tandem mixer. The tandem mixer settings will be the...
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First Flyable Config

Posted 07-21-2012 at 06:52 AM by jolyboy

This is the first flyable configuration I did. I have done revised versions of this for better CoG, but now I'm in the process of upgrading to flybarless due to the horrible quality of the blue rotors (bearings jamming, screws breaking ). The new rotors will be Tarot 450DFC heads, which allow better pitch range than the flybarred heads and much less slop.

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Trial fit of components

Posted 07-06-2012 at 09:18 PM by jolyboy

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Modified Twinn Rexx with rear-mounted motor

Posted 07-04-2012 at 06:59 PM by jolyboy
Updated 07-04-2012 at 07:22 PM by jolyboy (Add photos)

This blog is to keep track of my progress on the Twinn Rexx build I undertook a few months ago. There have been many issues from the lack of the availability of parts, so I have modified the design as a work-around. The only part sourced from Tech-MP is the TH-2 tandem controller, since all other parts are no longer available.

So far, the chassis has been the most challenging part of the build, but luckily I have access to laser cutting and water-jet cutting for free. I have cut...
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