u can do 46 wing problem
 

as far as i have researched the 9202 has 90+ oz in of torque at 6 volts, but is a little slow, thats why i went the extra 10 bucks route for the MG 9405. i was actually thinking of going with a carbon fibre wing dowell or using a bit of alum. tube with a dowell epoxied inside it. ill be using a new OS 70 surpass 1 14x4w apc, i also used a 10 ounce sullivan tank and lowered it closer to the carb center line. i wanted to put the tank on the CG but found it impossible without using a pump or eliminating the top center section sheeting of the wing. also im making my own servo extensions from wire and connectors they use on robotics equipment at intel, should be bulletproof as well. i just dont trust wimpy 5 dollar extensions. you would think with all of the technology in our radio systems they would have come up with a better aftermarket D-sub connector to use, similiar to the futaba digital connectors, which are very nice.


Dylan

u can do 46 wing problem
 

doh, that's Dylwad's plane! well nice looking Dylwad! I know your elevator is going to be quite strong after seeing your construction method.

If the 3010 is like the 3004, I'd be happy. I flew 3004's on all surfaces on a HOB Extra 300L for a year and they continually centered great. It was about the best small precision plane I've flown...

u can do 46 wing problem
 

I actually had a 9202 on the rudder and 3001's on the ailerons. The actual torque on the 9202s has been a mystery for years as it keeps changing. It was not happy on the rudder,it would oscillate upon centering . They were originally rated at 55 oz at 4.8.

The tank height has not been a problem with the OS 70 much to my surprise I personally would use a smaller tank.(6oz) That little 70 sips fuel if you're doing 3D not high speed laps. It will affect the CG less, the CG does change with full fuel but not a big deal on this plane

The extra wing dowel would prevent the wing from rocking in the front saddle area

OS is going to be releasing a pumped, light weight version of the 70 in the near future

u can do 46 wing problem
 

I may have a bead on an OS 70FSII. We'll see how it pans out...

I've also not had too much issue with tank location yet. I do end up running the engine rich, but I'm ok with that as rich engines run cooler.

Dylwad, I got some nice extensions from Central Hobbies. They were pricey, but for the 24" ones I don't mind. They're JR and I think 18 guage wire. Tested them with my meter at the connectors, very minimal voltage drop.

u can do 46 wing problem
 

The OS 70 is not a light engine. You can get by with both elevators servos.With the battery in the nose it will balance in the 5.25" - 5.5" a good CG for everything but waterfalls and improving flat spins a bit. However a lighter plane is always better.

It appears that the 3010 Futabas are not ball bearing servos. 90 oz servo and no bearings? Strange. The Hitec 545bb and 525bb are soild performers, nylon gears, 5 pole motors. I use a 545 for my Flip elevator ,it is not a fast servo but it will snap the Flip upside down almost instantly with full rate elevator, no blow back issues, good centering

u can do 46 wing problem
 

hitec 645 mg, not the fastest but solid at 133 oz at 6 volt, i think around 118 at 4.8 all around on my ucd great holding power oh yeah i have 2 for my elevator. And cheap at 38 bucks each




flutter what a thing
ray

u can do 46 wing problem
 

well, after all my talk of the wing problems probably caused by abuse, my wing fails!! although it wasn't the same problem as others have had, the wing is still fully intact in my case. The small piece of wood that the wing bolts into simply came unglued. The plane is completely destroyed from the back of the canopy forwards. From what it looks like the electronics, engine, and wing are fine though. (the score at our field is 4 crashes and 4 planes flying today!!! some days you just shouldn't fly! Only 1 pilot error, the rest were various random equipment failures)

the details of what happened... was out flying for about 30 minutes, it was flying great and I was being somewhat conservative, just having a relaxing evening... I was starting to make my way to the end of the field for landing, pulled up and was going to immelman over and land. The only problem was that as I started coming over the top, the wing slowed while the plane kept going up! The plane continued on a nice arc right into the ground. I at least did have the presense of mind to both shut the engine down immediately and also hold full up and left rudder, which did quite a bit to slow the decent. The wing continued for another minute or two until finally touching down about 300 feet from the plane.

u can do 46 wing problem
 

rkramer

I'm sorry to hear about your incident.That is a lousy way to end the weekend. The wing hold down plate should never fail under any circumstances. I know I will reinforce mine before I fly it again.

How many flights do you have on it?
What engine are you using? Call HobbyServices and see if they will replace it.

u can do 46 wing problem
 

Probably 30-40 flights, saito .72, 13x6 prop. Flutter wasn't an issue, speed was kept low. (I've had other 3d planes and know how to keep them flying...) I'll get some pics posted but it appears the hold down came unglued on one side, broke in half, then came unglued from the other side.

u can do 46 wing problem
 

I understand that your plane didn't flutter. The flutter comments were not directed at you, my fault.

The wing mount plate does not look like it is very secure. I'll be reinforcing mine before I fly it again.

Take the time and call to see if they will replace it. In my opinion it should not have failed.

u can do 46 wing problem
 

no prob, it was a really unusual crash. I even had a family of spectators that knew I was going to be out flying and came to the field to watch... All great flights for the evening, and the wing departs right before landing!

anyway, emailed GP. They said send it in and they will see if it is covered. Unfortunately a hassle, I may end up buying a second one, the flying season up north is too short to wait for planes in shipping!

u can do 46 wing problem
 

Sorry about you losing your plane rkramer. I know how it feels :(.

But to good news: Finally got the first flights on my UCD46 #2 today. Only 3, but I figured I wouldn't push things, didn't have a ton of time. Flew great, of course no flutter with the CF rods, etc. Nice thing is, I was actually able to climb out of hovers! Now, if you've followed this thread, I only have an OS46FX in it. But I do spin a 12.25x3.75 prop, no baffle in the muffler, plus drilled it out a little on the exhaust end. Getting right about 12000 rpm with this combo. Now, I'm not saying I muscle out of hovers, but I feel great about doing that - especially since I'm at about 4500 feet! I may be biased, but I like its looks in the air much better than the razzle 3d and the diablotin at our field today. (Too bad I don't fly as well as those guys do ;) )

u can do 46 wing problem
 

talked to gp the other day and they told me I will be getting a replacement wing for my plane as mine broke in flight but I was able to land to save the plane

RE: flutter
 

edgey thanks for advice on flutter

RE: flutter
 

edgey pm's off

RE: flutter
 

Used the advice on the Faggyan plane. Thanks

RE: u can do 46 wing problem
 

Is there a way to prevent the tail section from breaking? Was it due to flutter? Im am going to maiden mine next sunday. Now is the time to let me know what i can do to make it a sucessfull flight:) Thanks a bunch

Santi

RE: u can do 46 wing problem
 

santi on my ucd the tail broke right under ther stab, so I wanted to beef that area up so I took 2 pieces of carbon fiber and put it from the bottom of the fuse to the tips of the stab and now it is strong as a rock, it looks exactly like the tail supports on the funtana

RE: u can do 46 wing problem
 

Well I lost my ucando as well due to wing flutter after the first flight. It fluttered for ~1 second and the wing separated.

I was using 120oz JR 4721 servos and 4-40 rods with metal clevises. It fluttered at 1/2 throttle with a 61fx running a 12x5 prop I know I was under proping it but I was afraid of flutter but guess what it fluttered and half the wing went one way and the rest came crashing down.

I flew my dazzler full speed at 100mph that has large control surfaces on the wing and never fluttered.

Why does this specific plane flutter so much and so unpredictably ?

RE: u can do 46 wing problem
 

Please, anyone, everyone! Please tell me what I can do. I have asked very nicely to get the UCD 3D for Christmas. I know, I know, a grown man asking for airplanes, but, yea, it happens. Please tell me what I can do BEFORE I take this thing out of the box. I have had the plane in the house for about a month now, but my wife will not let me have it until Chrismas!!!
I do not know what to do! I have read good reviews and I have seen bad reviews. What am I to do? I already have a Tower .61 for it. I know it seems to be overkill, but there is a guy at the field that swears by his, with the same configuration. Is there anything I can do, outside of putting better linkages in? I will check for good bonds in the glue points. I will make sure that there are no gaps in the flight surfaces and so on. But, aside from that, what can I do?
You guys have gotten me scared! I fly a beaten up old trainer (Tower trainer .40) and a predator 500 from Lanier. The trainer, I can do just about all I can do. I have crashed it so many times and rebuilt it so many times that I am fearless when flying. The Predator flies like it is going to commit suicide at any minute! It keeps me focused at all times. Apart from rolling a little slow, it climbs and drops like a bee on steroids. I lowered the powerplant, as I had a .46 on it and it was just insane for me to keep track of because it is all yellow and flies like stink! Anyway, I am losing the point.

Can you all please tell me what to do before I get it to the flying field? Thanks in advance.

Red

RE: u can do 46 wing problem
 

A tower .61 is far from overkill. Many people are having a lot of luck with the O.S. .91 on the UCD .46. As far as flutter goes due to speed, thats what they make a throttle for. There is a guy at the field that has one with a saito .91 and its a great bird. The .91 will do everything that one with a .72 will do but the .91 will do it better. Just watch your down lines and full throttle blenders [:@]. The only problems he has had was a few of the cheap CA hinges included in the kit.
Dont let these guys get you worried just keep in mind that its 100% different than your predator. Use the power to you advantage and only go full throttle when vert. You should have 0 problems.

RE: u can do 46 wing problem
 

Dylwad :
Dylwad or somebody please help me make my u can do flutter free. I would like for someone to help me out putting ball links on the control surfaces of my u can do. What do I need? I can only buy from tower hobbies.

RE: u can do 46 wing problem
 

Big control surfaces and high speed do not mix. Flutter-the only way to really prevent it to limit your speed. Sealing the hinge gaps, good mechanical linkage setup, strong servos can help, but ultimately too much speed will get you. Yes, I am speaking from experience.

RE: u can do 46 wing problem
 

Ab_jose1 , What exactly are you referring to when you mention flutter? Are the ailerons fluttering? Is the wing drumming?

RE: u can do 46 wing problem
 

i use these Jose, they have worked great;), just click on the link below!!

http://www2.towerhobbies.com/cgi-bin...?&I=LXD912&P=7