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Phoenix Tiger 3 Twin Conversion

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Old 10-24-2018, 05:04 AM
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thailazer
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Default Phoenix Tiger 3 Twin Conversion

Phoenix Models makes a quality Tiger copy in a few sizes, and I decided to make the 71 inch 15cc version into a twin. Running two OS 46AX engines, it is a fast plane to fly! Those ARFs out there make good platforms for all kinds of conversions. The plane actually flew on a single OS 46AX on the nose but it had anemic performance for aerobatics as one would expect, and it was floater on landing.

https://www.youtube.com/watch?v=TCiR...ature=youtu.be
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Old 01-24-2019, 04:59 PM
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What size fuel tanks are you using and what is the flight time? I have a pair of 46 AX engines waiting to go into something.
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Old 01-24-2019, 05:38 PM
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Thailazer,

Awesome job! Years ago I put three 46LA's on an Uproar 60. I think the wingspan was around 61". It was a real bear to land, with all three engines at idle it still wanted to fly. Eventually I pulled the center engine and flew it as a twin, much easier to land. I crashed the twin after many enjoyable flights and had thought this tomfoolery was out of my system, but 15 seconds into your video I realized I wasn't.

Damn, should I scratch build another Uproar 60? or bash an ARF like you did? I still have the three 46LA's, decisions, decisions, decisions...
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Old 01-24-2019, 10:26 PM
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Originally Posted by CLBAKER View Post
What size fuel tanks are you using and what is the flight time? I have a pair of 46 AX engines waiting to go into something.
I used 8 oz tanks and normally fly about 9 minutes or so. Normally have plenty of fuel left so no issues. The Tiger is over powered as a Twin so the engines are not at full throttle much of the time. You can hear the throttle coming back often in the video. Those 46AXs are great engines so best of luck with your project!
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Old 01-24-2019, 10:30 PM
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Originally Posted by Corsairacobra View Post
Thailazer,

Awesome job! Years ago I put three 46LA's on an Uproar 60. I think the wingspan was around 61". It was a real bear to land, with all three engines at idle it still wanted to fly. Eventually I pulled the center engine and flew it as a twin, much easier to land. I crashed the twin after many enjoyable flights and had thought this tomfoolery was out of my system, but 15 seconds into your video I realized I wasn't.

Damn, should I scratch build another Uproar 60? or bash an ARF like you did? I still have the three 46LA's, decisions, decisions, decisions...
THREE? Wow, that is unreal! I can only imagine what that was like. And yeah.... Twins or Tris are hard to get out of your system once you have been there. I was going to put a single 90AX on this ship but can't do it..... It has to stay a twin. So the bottom line.... Get on with it and build a Twin!
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Old 01-25-2019, 01:05 PM
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What is the wing cord on the Tiger 3, should have asked on the first post. This will be my third twin. Looking forward to this build.
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Old 01-25-2019, 04:59 PM
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The chord is 12.25 inches including the ailerons. Here are some photos of the nacelles. I mounted the tanks sideways so that their width allowed maple beams to be used for the motor mounts. The nacelles would have been too wide if I had used them in their normal orientation.





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