Rear Exhaust motor from Thunder Tiger

[Mike Hester]

Hi John,

I had one, and I liked it a lot. The only thing I didn't like was the bottom end. It transitioned fine, but I never could get the idle as low as I wanted. I suppose playing with different props and such would yeild good results. 

The exhaust system seems to be more picky on this engine than most large 2 cycles. I ran it with a macs header and a CD Cannister system I got from Lamar Blair, and it ran well. It was a tad on the heavy side though.

I did have to play with the pump pressure a little to get it right, and change plugs a lot until I finally installed an OS F. 

It doesn't quite have the power of an OS 140, but more than a YS 120 (any flavor). About the same power as the YS 140L, if propped and piped right.

Would I use one again? Yes, if I had a plane that was light and needed some punch, but an OS 140 would be too much. I wouldn't use it on a 2 meter plane unless it was one of the older skinny designs. But one of the current 90-110 sized models, yep.

Not sure if that helped or confused you. It has it's little quirks, but it can be a good engine.

-Mike

  ----- Original Message ----- 
  From: John Pavlick 
  To: discussion at nsrca.org 
  Sent: Tuesday, December 21, 2004 10:23 PM
  Subject: Rear Exhaust motor from Thunder Tiger


  guys,
   I just found out that Thunder Tiger (Ace R/C) makes a REAR EXHAUST 1.20 with a pump for about $200.00. Has anyone ever seen one of these? One of the guys I fly with is an Ace dealer so I can get one and give it a try. They also sell a pipe and header for it. It's either very new or discontinued because the only place I've seen it on the web is Quantum Models. This might be worth investigating unless someone has already tried it. Let me know.

  John Pavlick
  http://www.idseng.com
    
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