RE: U Can Do 3D
 

msouth, Much obliged!

RE: U Can Do 3D
 

After just about completeing my 3rd & last Do, I remembered how many modifications I had to make to get them strong enough and fly right. I had a lot of trouble figuring out where to mount the throttle servo,I ended up putting it where the last Do had it,up front under the nose on the long,angled ply bottom, at least this makes the push rod short but requires much bending which is where the frustration comes from. The Ny-rod types dont work because of permanent bends required. The X100 goes together with very few changes and doesnt have any of the Do bad habits flying. It will be interesting to see if I can match the 3-D part with this one,seems the set-ups are critical to get it to hover,harrier,T/R well. Great Planes better come up with something to match the X100 or they are in trouble with the U-Can-Dos. They dont seem to keep up with the pack, it still would be a good first plane for the 3-D beginner, provided they get some help with building tips.

RE: U Can Do 3D
 

finished my DO today, the radio problem was due to a bad RX which also explains my TF-P51 unexplained demise. Thanks for the help on this group. I tried to upload a photo hope it took. I plan to fly in the morning and will report my thoughts.
Later,
Brad

RE: U Can Do 3D
 

:)Brad SD...

Good looking plane. Hope you enjoy it as much as I do mine.

My only comments would be that I think you need to cut the cowl for more air flow. It doesn't look like you have enough to me. You may get overheating problems the way it is.

Thanks
Barry

PS: Here's a picture of mine.

RE: U Can Do 3D
 

Brad, Barry is giving some good advice and I bet its from some hard earned experience. Gotta get all the air flow that you can. I look at it this way, cut the front as big as the cylinder and head and then get all you can from the back. Good luck, Joe

RE: U Can Do 3D
 

I rushed to get my 3rd UCD together for the weekend,didnt bother with the cowl, I did add tri stock and hardwood blocks to the gear blocks and it still tore out!! I did a harrier landing to test everything and was kind of shocked to see it fail. After looking at the block attached to the gear,there was almost no glue at all,seems GP is still missing the point. Now I can see all those posts that complained about a good landing and the gear came out like butter was used for glue. The beefing up I did required at least some glue to hold the main block in. After fixing that I found out how hard it is to get 3 of the same planes with same setup to 3-D exacltly alike. I need upthrust,more right thrust,have to dial in the throws for the "sweet spot" for harriers. The maiden was just about perfect,only needed 2 clicks of elevator, the weight was 8.2 lbs,close to the last one. I used offset to elevator mix as a temporary thrust line adjustment,it works but I think it slows down the torque rolling,will have to use washers to see. My engine was "sagging" and losing power in hovers,temp was about 85 and the new props I cut seem to be pulling too much,will cut another 1/4 " off and narrow the tips to a point. Just about at sunset,the engine came back to life,would pull out better. One important note: I found out something about the Futaba 8 & 9 series radios. If you use the ATV for throttle High & low end point , you can end up with a weird expo-like mix. It only happens if you use a lot of ATV to make the carb fully open & close. I checked throttle expo,thinking it must be set to on, but it was off & set to 0%. My transition was way out of wack,with the first half of stick motion,almost no movement to the carb,then the carb would fully open with the upper half stick movement. I started thinking my servo went bad,even tried my old 8UAF and it did the same. After making the pushrod longer, I found out its something the radio does. I ve had the 8 UAF and 9C for years and never noticed that little quirk? You can get this " default expo" to varying degrees,depending on how much ATV used. It might not be so obvious if a little is "induced"(for lack of a better term)Now I need to go back to my other planes and check them,there might be some expo in them too.
I didnt touch the tail in a hover, but I think I'll be able to do it again with a little more tweaking.

RE: U Can Do 3D
 

The 60 Do is extremely responsive to upthrust washers,I added 2 and now it pulls to the canopy very bad in hover. Other planes I've had didnt seem to matter if 1 or 2 was added (Yak for instance). I ended up removing 1 and added a little more right thrust. It never ceases to amaze me how crooked it looks with the engine leaning to the right,but it needs it to fly straight up and harrier well. I ended up making a harrier landing but it wasnt planned,the epoxy&hardwood I added held up but the tail wheel bent some,its a GP scale tail wheel for 20-25lb planes and it still bent. Guess I better re-think the harrier landing thing,either I have to change the way I do it or forget it. All I want to do is get back to hovering,T/R tail touches!!! That was sooo much fun.

RE: U Can Do 3D
 

MIX MASTER SAID :I use nothing but Cline,they work well from a .40 up to 1.60.

I AGREE WITH HIM,,,,, IT HAS SUPPORTED ANY MOTOR, DOES NOT EXIST ON MOTORIZATION OR OVER MOTORIZATION.
ONLY MOVE THE CG, FLY SLOW AND DO ANITHING.... ( IF YOU FLY FAST, MMMMMMMMM DON'T DO THAT.)

RE: U Can Do 3D
 

Si!

RE: U Can Do 3D
 

I,M BACK!!! After a dozen or so flights and some up-thrust & right thrust changes,I finally got back DOD this weekend with my 3rd U-Can-Do 60. It takes a few flights for me to "warm up" ,there always seems to be something off or different the first attempt, but after a few tries I settled down and got another hovering tail touch. I guess it must be me,not the plane,I have to really focus on the planes attitude or else it gets too far out. The "sweet spot" in a hover is really quite small. Its weird,I cut my prop just 1/4 " shorter and tapered the tips a little more and now the plane will slide down a whole lot in a hurry,I swear I'm dropping 10-15 ft. sometimes without losing control. I have to be real careful not to slam the rudder in,which the next flight I did with the whole plane! It was humid and about 85 deg.,my engine must have overheated when I was 5 feet up,I let it drop to 2 feet,then I went to full and it still came down and I ran out of space to the fence(which I was lower than),I had to roll since it came out sideways but I had no control & & hit the ground at the wing tip,then nosed in. The only damage was the prop and a little crack in the aileron tip,it only had 2 feet to fall,with a little luck I could have had a hover landing! I also tried some rolling harrier elevators into the wind,it actually works,just a little less throttle and it starts coming down and moving just a little bit forward,I got to about 20 ft. and bailed out. If I practice this some more,I can see getting even lower,that would be so cool,rolling harriers down to 10 ,5 ft??? The Do rocks on-right Barry?

RE: U Can Do 3D
 

:)mixmaster...

The UCD60 is my favorite plane. But I don't go as low as you. A 10-15' hover is as low as I will go. Inverted flying I'll go to under 5' but the Harriers, rolling stuff, I keep it up there. To easy to just get a "wind slap" or make a small mistake. Not worth it to me.

But you sound like you are having a great time. Keep it up. And yes, I don't ever invision the day that I won't have at least one UCD. I think I'll get rid of my Giant but the other two are keepers.

Thanks
Barry

RE: U Can Do 3D
 

I hear you,thats why for the most part I dont do the tail touching unless its calm. The wind will definately knock the Do out of hovers& harriers. That is one of the draw backs to small planes,I think 30-40% will handle wind and 3-D better. I say if you can hover/harrier 10ft., you can do it lower,its just a matter of how much risk you are willing to take. I've paid a price to get DOD,lost several planes and banged up many other times. I will say it was worth it only if it stops at some point,hope I'm there now.
Thats another good point for the Do,fairly low pucker considering the price.

RE: U Can Do 3D
 

Have to get my planes ready for the weekend,another annual fly-in,camp out,pig-out. I would sure love to do a hovering tail touch with everybody there but it depends a lot on wind for me,I've tried to move it around in a hover and can just barely manage that when its calm,cant imagine pulling that off in any kind of wind. The rolling harriers are really slow compared to some videos I've seen but I've done them down to about 20 ft,that slow pace makes it easier,safer to get lower. I dont think I'll ever try to do'em like Kyle does,one tiny mistake at that speed& height-its all over.

RE: U Can Do 3D
 

I went out last night to practice some TR,hovers,& rolling harriers which are coming along nicely,I'm getting much lower with the RH's since they are pretty slow,no problem keeping up at that pace. I want to put on a good "show" during the fly-in this weekend. Only problem I had was an aileron servo decided to act up when I wanted to show a friend how far I've progressed,instead I looked like a moron flopping around like a wounded duck. When I landed I noticed the right ail sticking almost all the way up,then would drop later after going to neutral,no wonder!!! Thats the first Hitec 635 thats failed on me but it was 3 yrs old and in the 3rd plane so I'm not very upset,at least I got the plane back. It was most likely a "pot" failure,it wasnt a gear. Whats weird about it is the last time a Hitec servo took a dump on me was an old HS605 on the right ail of a Goldberg Sukhoi, it failed the same way?

RE: U Can Do 3D
 

Hey Mix, You're making me jealous with the Fly-in, camp out, pig-out stuff. I wish I could do that........[>:] I let a guy at our club fly my Do sometimes and I'll have to say it does some fine rolling harriers. I'll have to practice so I can do them myself.

RE: U Can Do 3D
 

I really enjoy that stuff when the weather cooperates,good friends,planes,food,beer,campfires,wives at home so we can talk about them(imagine what they are saying bout us?). I dont know if its just me or my servos, but with the Do and the X100 my rolling harriers are quite slower than what you see in videos. I dont really mind at this point,they still look like RH's,pretty high alpha so I cant complain,I just imagine its a 40%. My 3-d really came around this summer,just increased my flying time and voila!!

RE: U Can Do 3D
 

I fly mine with YS110, 17x4w, tank over cg, cg on 6" and I like this set up in every maneuver. I even have 2+oz lead on the tail and it´s a no problem for the U.

Link to one of mine videos ftp://rcheli:[email protected]/Film..._Tuochdown.wmv


http://i66.photobucket.com/albums/h2...8020b_1024.jpg

Torbjörn Olofsson
Sweden

RE: U Can Do 3D
 

Olle, you have a fantastic and beautiful flying field!

RE: U Can Do 3D
 

Rajul!

It´s two ordinary Swedish football field that we have access to, but it is a 13 foot high fence between the two fields and that could be a problem some times.

T Olofsson
Sweden

RE: U Can Do 3D
 

OK, I can see those fences in your video. Try not to score any "goal" with your planes :D All the best!

RE: U Can Do 3D
 

You've got it dialed in,nice hoovering! I did another tail touch Friday evening with my Do but on Sunday the engine flamed out just after going vertical in a wall,was up about 4-5ft.. I did something I've never done before,I just let it fall since I figured it was done anyway. It did a stall turn(sort of) on its own and went straight down in. Lucky the ground was soft from rain,no damage to engine,firewall,mounts or anything except a cracked cowl,tail wheel tore out and fuel tank former broke loose. I cleaned out the hunk of turf from the cowl,flushed out the carb and started it with a new prop,still runs good! Guess I better lean it or something,it sounded a little rich on transition. Just another minor mishap to me,worse has happened, 3-D down low is definately higher risk. The lower I get does seem to minimize the damage when things go bad,I use that thought to help "allow" myself to hover below the 3ft. level, I figure if you can hover well at 10 ft,you might as well try for lower, it will have less impact if it goes in.

RE: U Can Do 3D
 

special take of - special landing

http://www.aeromodelismo****co.cl/gale14.htm

RE: U Can Do 3D
 

Ouchhh! The engine died on the upline?

RE: U Can Do 3D
 

yes, it died up line but now its ok, i'm flying it.

Sergio

RE: U Can Do 3D
 

[sm=thumbup.gif] What engine do you have on it?