UCD -46
 

Greetings all, I hope everyone is having a great holiday season. I got a U Can Do -46 for xmass, and I have been hearing that these planes build tail heavy. Could anyone here shed some light on this for me? If it does build tail heavy I was considering going with a Magnum 80 RFS as it weighs 22.2oz the OS 70 is lighter, and the Saito 72 is really light at 16.7 oz. but if my info is wrong and the UCD builds fine I will prbably go with the Saito. Any comments would be great.

Happy holidays

RE: UCD -46
 

I am planning on getting the UCD 60 in the next couple of months and have been doing some reading on the 60 size plane and have read a few posts about it being built on the recomended CG and the plane would have a better 3D performance with a more aft. infact under the product guide here on RC Universe is where I read about the CG being more AFT for a more 3D experance check it out here

http://www.rcuniverse.com/magazine/a...?article_id=44

just copy and paste to your address bar
read about it its god reading and there is some vid on it there too.
great Flying
Rick;)

RE: UCD -46
 

I think, after building mine and flying it, that the tail heavy planes were trying to balance about 5" back. the UCD flies fine at 6" back. But, the extra power you'd get from the Magnum would be worth using. I've got a Saito .91 in mine and I think it's perfect. I originally mounted the rudder servo in the wing opening and used pull pulls, but after flying it, I moved it back to the tail. Inverted is much better at the rearward CG. The UCD comes in between 5.5-6lbs, so the larger motor would be a benefit.

RE: UCD -46
 

I have a UCD 46 and I have a few question I was wondering if anyone could help me with. I was wondering whats the advantage of having a push-pull system on the rudder and do I need one on the .46 UCD. Will this make the plane more nose heavy since the rudder servo is being moved further to the front of the plane. What is the best way of strengthening the landing gear before it breaks away. Any comments will be very appreciated.

RE: UCD -46
 

I had my rudder on pull pull when I first built mine, but moved it back to the rear after flying it a few times. I needed the CG further back anyway. So, unless you're really tail heavy now, I'd suggest leaving the rudder servo in the tail.

RE: UCD -46
 

What engine were you running at the time and how much did your plane weigh. I'm going with a saito .72. Overall, is there an advantage of having the pull-push on othe rudder, or not. I was planning on mounting the rudder servo to the bottom of the fuse and rig the pull-push as well.

RE: UCD -46
 

I'm running a Saito .91, which is more than enough. I think the .72 would probably do well. I got a good deal on the .91 so I used it. Not sure if there would be any advantage to using pull pull or not. I think it's easier to set up a regular pushrod linkage, but the pull pull has a more positive feel to it. There isn't as much slop in the linkage. As I said earlier, if you need the nose weight, then use pull pull with the servo up front. Otherwise, use a pushrod (4-40, not the 2-56 supplied. It's too weak and will bend) with the servo in the tail.

46 UCD
 

Thanks for the info.