I personally cannot recommed the YS line of motors...
They are indeed powerful for their "size" but can be VERY finicky in srtting up and running. They PREFER according to YS Performance 20/20 blend fuel. We have seen them to be even finicky about brand of fuel.
I have 3 (2 91's and a 120) and I'll NEVER buy another... EVER.
I had on eon the nose of my U3D and it had plenty of power... next day? The momo decided not to run at all... FOR NO REASON!
I went out and bought my first Saito... the 100.... Absolutely the BEST engine for this plane... GOBS of power, lightweight, runs perfect (and it's not even broke in yet).
I can't imagine ANYONE putting an O.S. 160fx or a YS 120 in this plane... WHY would you want to burn that much extra fuel when unlimited vertical is available in a smaller package (and less money)
Again... in my experience, the Saito 100 is an "overpowering power plant" for this plane without "feeling" like it's too much motor....
Originally posted by Dennis Tampa FL
What do we know about an up comming YS 110 ??
Can I ask what is the idea engine for the UCD 3D? , for me it will be the most powerful yet lightest that can be possible to put the fuel tank close to the CG so which one would that be.
I was thing ing the YS 91 but someone said it could use a little more power?
I am going to get the UCD 3D as a 3rd to 4th plane.
Thanks, Dennis