I put a Brisson 2.4 in mine at 3lb 10oz with battery,ignition and muffler. With that I had to put about 1oz of lead on the tail.
Watch your weight. The 2.4 has enough power.

The weight of 3lb 10 oz is with ignition, exhaust, and battery?
Because I'm thinking in buying one and using the zdz 50 weighs around 3.37lbs I believe that is with battery and ignition. What is the total weight of your plane with that engine?

Sorry I didn't answer earlyer. I've done alot of researchon the ZDZ 50 and decided to order one for my plane. The 2.4 works good,but I think the ZDZ 50 will work great at no extra weight.

I ordered mine from a German web site. They have them cheaper at $425, The prop drill jig is only $26 and they don't charge any shipping right now.
Click the small icon in the lower left corner to choose English and US currency. Shipping time is approx. 3 weeks, but they have them IN STOCK and ready to ship. Mine shipped a few days ago.
Bisson has mufflers now at $98.
I hope this helps. Good luck. :thumbup

Amelung Modellbau ZDZ,Moki
www.zdz-motor.de/index.html?lang=en-us

im puttin a taurus 3.2 in mine only weighs 3.3 lbs and has awesome power i hear. im also running hitec 5625MG and a 5945MG on the rudder

p.s. finally a forum about this awesome airplane

I hope you are running a Hitec Radio. I've heard or problems with the hitec digitals and other Radio brands. I am running JR coreless servos 4131 and 4127.
I had a 2.4 in mine and it had almost unlimited vertical. I like everyone else has been bitten by the power bug. The ZDZ50 turns a 22X10 at 7000 rpm.

im running a jr radio and they work fine with a pcm rx and all kinds of other backup systems so it should be fine