RE: U Can Do 3D
 

wow joe , pretty cool. whats the bottom look like, stock? i almost have mine finished and i finally got my tank over cg so i cant wait to try it.by the way , my crash was way more intense. ive some good pics of whats left but i still havent figured how to post pics yet but im trying.cool plane.

RE: U Can Do 3D
 

I know PowerMaster is 23% synth but I did know Cool Power was too!!!

RE: U Can Do 3D
 

Yes, the bottom is still the stock red and white checks, couldn't give up those visuals. Tank on the CG is the way to go, great improvement. My first three were very intense. This one, #4, is actually a 'frankenstien' built from the first three. I swore it would be the last, but this one wasn't bad enough to discard. Good luck with yours. Joe

BTW, these picks are from when I was running the Saito 100 W/ Cline regulator. The battery is now half way down the tail with the YS 110 up front.

RE: U Can Do 3D
 

nice work in the fuselage area. did you gain or loose weight?

I have a salvagable wing from my last one. the fuse is hiss. but good tail. I also have a complete hardware box with gear, pants, even the cowl. I guess if i have the time i will make a homebrew fuse. I would like to loose some of the tail length and make the body a little more harrier style and see it it will blender. But first i have to have time:eek:

RE: U Can Do 3D
 

You got me thinking, so I weighed it. 8#11oz. What a fatty. Gained 5 oz. It was 8#2oz. with the Saito 100. Gained 4 oz. with the YS 110 and now the rebuild added 5 oz. With the rebuild came the 'Hatori' header. Not sure what that weighs, but it did displace the muffler and the threaded pipe to secure it. Its all the tails and spare parts that keep me coming back. I have too much stuff to not rebuild. I said it before, but here goes again, this is the last one!!!!! One thing that I did notice with the additional weight from the YS, it flew and handled better. We will see what the gain brings this time. I know that the YS won't notice. Later, Joe

RE: U Can Do 3D
 

Did you install the 1.20 in the UCD? I have just aquired one of these and was wondering how it went for you.

Regards,
-Jeff

RE: U Can Do 3D
 

yes,,, I still havent got a YS.. Im still flying UCD #2 with a 91 4 stroke 15x4W and 30% [&o]

RE: U Can Do 3D
 

hey guys, i just finished ucd #2 and fired it up and it seemed to run a little uneven on the low end so i was wandering if it might be because i moved the tank back to cg and i dont have a cline yet? seemed to run good at high R'ss. it wont die on me when i get up and go vert will it? just wondering if i can go without the cline or should i put the tank back to stock untill i get it? i know its a lot of questions but you guys are my only source. thanks

RE: U Can Do 3D
 

It will run fine as long as you keep the RPMs high, ensuring proper feed pressure. Its when you throttle back and the pressure drops that it will quit. Prepare for dead stick. I would keep it in stock location until the Cline is installed. What the Cline does is, with the aid of the one way valve in the pressure line, is to hold pressure in the tank. I forget, but its like between 2 to 9 pounds of operating pressure. With that built up pressure, when you throttle up and the carb sucks for fuel, it opens the diaphragm and meters out the fuel needed. Throttle back, suction diminishes and the regulator closes accordingly. The reg is factory set for general atmospheric pressure and if there is a substantial change in the barometer, you will notice it. My Saito 100 worked great with it, but late in the summer evenings, right about when the sun was setting and a dew would form on the grass, the carb settings would go out. The last flight of the night was always like that. Good luck, Joe

RE: U Can Do 3D
 

Anyone flying the 46 sized UCD with a YS 63? Enough power?

RE: U Can Do 3D
 

I would advise checking any potential purchase very carefully. Mine was missing the instructions. The wing was covered upside
down ( The servo holes are now on the top of the wing). The wheels were too large for the wheel pants. and I still have not finished the damn thing. Great planes could not even take the time to reply to my email complaint. unhappy camper.[:'(]

RE: U Can Do 3D
 

could you post a pic of the wing what size were the wheels

RE: U Can Do 3D
 

you can go to tower hobbies website and go to u can do section and they have the manuel there. i have had two and no problems yet.i just maidened #2 today and it was just perfect! mine is a 60 size.

RE: U Can Do 3D
 

In an effort to appease the 'Noise Police' @ the field, I installed my muffler today. Didn't run it up yet, as the weather here is very depressing. Down right nasty. I know it won't have the growl of the open header and dosen't look bad. Joe

RE: U Can Do 3D
 

where can i get one of them thar headers joe? i havent any noise police out here near death valley!!!!. my new ucd came in at 7.3lbs this time (only dif is the tru turn).flew today w/knife edge at 50 ft and didnt even sweat!

RE: U Can Do 3D
 

GJ, Central Hobbies, they offer Hatori headers and Johnson headers with a wide range of tuned pipes as well. You will realise a jump in HP if you run it open. Joe

Forgot the best part, no more goo all over the plane with the exhaust going down the middle.

RE: U Can Do 3D
 

I was wondering if the fuel tank over the CG will require a pump if you're running a 2 stroke (OS 91 FX)? My UCD weighs in at 8.2 lbs but I had to add weight to the tail to get the CG right. My OS 91 suffers from pre-ignition and knocks like the dickens when I'm nose down. I inserted a second head gasket, which reduced it somewhat, but she still knocks. I'm flying 10% nitro. With my current set-up it'll go vertical until I can't see it, but I still would prefer to be able to move the CG back without adding more weight. I'm new to this forum, so hopefully I'm not revisiting issues from older posts.

RE: U Can Do 3D
 

Has anybody used a TT 91 on this plane? If so did it work ok?
It seems cheap enough but is it an ok engine?
Thanks

RE: U Can Do 3D
 

I like what you did with the colors cumn thru. I've been trying 3D stuff with my UCanDo but I can't seem to hold a hover, and am not real good with a harrier either. I attribute some of this to my lack of skill, but I also think moving my CG aft will make it a little easier to perform these maneuvers. One other thing I've noticed is a strong tuck towards the belly in knife edge. I've been able to mix alot of it out and on low rates (which I have set at "high rates" settings in the instructions) it's almost all gone. However, at 3D rates if attempting a knife edge loop or hanger keyhole, she reeeeally tucks toward the belly. The more rudder I give, the more she tucks. If I try to mix to get rid of it at high rates, then it really heads toward the canopy on low rates. Any suggestions? Has anyone else had a similar problem?

RE: U Can Do 3D
 

Seems that this is one bad trait without a solution. I've been trying to figure it out for two years now. Seems like its stalling the plane, but, if that were true, then it wouldn't favor the wheels. I did aleveate the way that it drops the opposite wing when rudder is applied. My stock, 80 sq. in. rudder is chopped down to a respectable 56 sq. in. and that solved it. The rudder was too tall and would twist the plane. You can't notice the missing area in flight. Still has plenty of rudder. Somehow I keep thinking that they went a little overboard on the size of the tail feathers. Even at stall speed, with 3D settings on elevator, it would snap out on a real tight loop. Its got plenty of wash on the surfaces with the 16/6 that the YS 110 swings. For now I just backed off on the throws. It works out good with the elevator slaved to the rudder, I'll have to check it out on high rates and see if it is like yours. Who knows, maybe I will figure it out someday. Maybe someone else has and its just a matter of time for them to speak up. Good luck, Joe

RE: U Can Do 3D
 

both of mine did it. I dont use any mixing. I just fly it trough. using slight aeleron and elevator corrections. when you come out of the KE loop it allways falls the same direction. I know its coming so i start in with the corrections. On this one #2 i have the rudder set up with not enough throw but i learned on #1 that if there is a point on the UCD that when the throws get too far the plane flys terrible. so on this one i went with factory settings. but still needs a shade of rudder. I have not been successfull in harriers with mine. lots of wing rock. I think it was cumn thru that said he did something to make them better. cant remember.

RE: U Can Do 3D
 

man you got your post up while i was typing:D

RE: U Can Do 3D
 

Here is the sequence of rudder mods. First pic is stock, second pic is the first mod, third pic is the second mod and fourth is final. First was a little off the top, Second was removal from the top of the trailing edge, resulting in a tapered effect. The final mod was the addition of some stock to the top, trailing edge which angled the top edge up to the rear. Also the trailing edge received more area at the bottom, enhancing the taper to the back. With the slight additions to the last mod I noticed that less rudder was required for KE. The small amount made a noticeable difference. Again, all this did was stop the way it would drop opposite wing when rudder is applied. It had no effect on the way it dives to the wheels. As some will point out, it could have been done with a radio mix. This is just the way that I chose to approach it.

On harriers you can mix in a little up reflex on the ailerons, slaved to the elevator. I've also read that you can tape two sections of wooden dowel to the top of each wing, about 2 inches back from the leading edge, which, reportedly, ensures that the top of the wing fully stalls by breaking up the air flow. The way that I read it is that the wing rock is due to the wing being caught between lift and stall. Joe

RE: U Can Do 3D
 

Thanks for the suggestions. I have a lot of things to try now. Just wish it wasn't so late in the year. I need more stick time!

RE: U Can Do 3D
 

Has anyone flown the .46 size??

Fun_fly_3D