i am looking for a 1.20/25% edge in arf that will go well with a saito1.80.

I run the Saito 180 on my DP ultimate. Not satisfied. I know a lot of guys are reporting that it is more than enough power, but I disagree. I would not consider any thing less than an OS 1.60. Prefer a Moki 1.8 or the 2.1 for ultimate experience. The Saito (IMO) will produce great scale power, but cant pull off the 3D. At least not mine.

How much does your DP ultimate weigh?

several here have stated a 120-140 YS powers it quite well, even unlimited IIRC. the 140 is similar to the 1.80 in listed power..

depends too on your wieght as previously asked....

I have experience with both moki's and YS and based on this experience I wouldn't favor the installation of my 1.8 into my DP Ultimate. You would sure have power though! However, I think the weight thing would be a disadvantage. In fact, I like the flying characteristics of my DP Ult with my 1.20 better than my YS 1.40. I have my battery pack mounted aft of the former which is located aft of the bottom wing saddle. I think with the 1.2 and the battery in this location my CG is a bit more aft and that's the reason for my preferrence. The power between the two engines is fairly close...I turn a 16x8 @ ~9000 on the 1.2 and 17x8 @~9000 on the 1.4.

I'm not sure you would have enough clearence for the 18x8+ prop required for the moki?

By the way my DP Ultimate has virtual unlimited verticle and it will pull out of a hover, all be it, not with authority. But, remember you have a low low wing loading of about 18oz/sq ft so you can essentially recover from any attitude --- but NOT altitude. LOL

Just a few thoughts based on my experience.

Take care.

Mike

I'm not a saito fan either. I had one on my H9 edge...it sucked

I have a smoke set up (TME) which add a bit, I weigh in dry at about 13.25.

Carden and AeroWorks!!!!!

Unless you get a H9 Edge, I don't know of another good ARF that size. If you want to go larger, the 31% Aeroworks would be a prime candidate.