Welcome aboard Scott. So you decided on he UCD. This is a much more tame airplane than the Giles by a long shot. You are going to absolutely love this bird. This thing is the most enjoyable airplane to fly in my hanger. Just palin fun at all speeds. Cumn thru ( Joe ) is our inhouse UCD expert. He is upgrading to a YS 110 to pull tree stumps out while doing TR's.

He is the Q&A guy by a long shot on this bird. But hey, we all chime in and provide our 2 cents even when not asked...... Good bunch of guys on this thread and we have all been here from just about the get go. So welcome! We tend toi hit all and any ssubjects so no one is going to balst you if you ask somethignthats not specifically about the UCD, but we try to keep it close to the UCD 60 as the main focus of the thread.

To answer your questions, I have the 91 Surpass, one of the earlier version without a pump. I can take off in about 10 maybe 20 feet and go vertical unlimited. Mine hovers very well and does a nice KE. I'm still working on the TR thing and think I need more throw or to upgrade to a 6 volt pack for more speed and power in my servos. For the overall weight vs power I am very happy with my engine. Now some of these guys have put pure beast engines on their's so we will let them chime in with their 2 cents.

Joe, what do you mean about regular maintenance schedule on the O ring? What do you do to keep them working properly. I have used the Dubro fuel valves forever and only had one failure. It was a fairly new valve on my DA. Per DA and others, fuel valves are not a good idea on gassers. The vibration just eat up the O ring and causes air leaks. Mine did it after about 75 flights and I was flying it a good bit and used the plastic cap over the valve end to help keep it clean. No crashes or dirt issues but it sure failed.