I got a 3 quick flights on mine this weekend.

OS 91FX, has more than enough power. 14-4 prop pulls it like MAD. Flys at 1/4 throttle. Very very easy to hover, almost too easy. I have massive throw in the ailerons and at different speeds, I am disappointed in the roll rate. Those wingtips may have to come off. Knife edge is great. A little pull to the belly, but not bad. Someone posted a KE wall. Its true, you can come by at a very low speed, and add a little power and go to full rate rudder and stand that thing UP!!! Best KE looping plane i have ever owned. Very stable plane to fly. Flat spins are flat and controllable with power. Waterfalls were a bit sloppy, but I it may be tail weight, I still have not balanced it yet.

More to come.

what prop shoudl i run if i put a saito 120 on mine?
thx
chris

Someone several posts back, said it wouldnt flat spin. If you notice in Mecam's video his plane doesnt want to either. Do you think this is a balance problem ?

Looking forward to hear how your plane flatspins and how cleanly it can waterfall after you move weight aft .
Also Id appreciate it if you could let me know the best CG measurement you find.

Thanks,
John

Have just bought a Great Planes U-Can-Do-3D and 5 new Hitec digital servos, type HS-5625, date coded March 02, to use in this model. Didn't realise there was a checkered history associated with these servos. I have a JR 3810 transmitter plus 700 Rx. Will this combination work reliably? What size of NiCad/ NiMh should I be considering.
I am imformed that any bugs associated with this servo have been erradicated. Does anybody know to the contary.
Would I be better cutting my loses and buying 5 off coreless servos?

I have decided not to put any more weight in the tail of mine, since it already pitches up when inverted. Mine does the best inverted flat spin on low to no power of anything I've owned or flown. When applying power to try to speed it up and stop the decent, the right stick needs to be jogled, or feathered, or it will tumble or roll out. I enjoy flying this thing in knife edge all over the sky, big figure eights etc.
DKjens

Flew mine for the first time last night. I'm flying it with a TT FS 91 w/ APC 13 x 8 prop and has plenty of power to fly around and bore holes but I'm almost at full throttle in a hover. Would like to change to either a OS 91 two stroke or would prefer a Saito 100.

I have a nose heavy CG mainly because I mounted my battery just aft of the trailing edge of where the wing is. I didn't think this thing would come out nose heavy like it did. I will add more weight to the tail this week.

Flying:
Wow, all other funfly airplanes I have are now history. This thing flies even better than my PRO-TWISTER. And I LOVED.......that airplane. I have never flown a more forgiving airplane since I've started flying. The only thing that I have owned that comes close to it was a Giant Stinger that I gutted and lightened the heck out of and flew w/G62.

The thing floats taking off and coming in for landings. It is the first airplane I've everflown on the first flight and felt like I've been flying it for years. Very relaxing!

My only complaint is that since I'm a builder I wish it would have been a kit. This is only the second ARF I've ever owned and couldn't pass it up. Too bad it had to be in ARF......But it is a great airplane.

I think its the same factory's product as the seducition 90 ??? what say ??
just a bit more than them !! they are priced a little cheaper..OK model that is !

looks the same .............to me

cheers
azuz

I've got a new Saito 100 on mine, and like others have said... this plane is a ball to fly... I have a Morris the Knife and it's darn close to being as fun.

Being bigger it does have slower movement to swing that big ole surface around, snaps are slow and rolls are fair to middlin'...

Hovering is indeed pretty easy and with a Saito 100 (and a 14x8 prop for break-in) will hover around 1/3 to 1/2 thottle... sweet!

Knife edges are too easy...


What I did notice for you guys having trouble with various maneuvers... Try the maneuver with varying throttle... I have found that the plane will quickly dump out of some situations with too much throttle. i.e. Mine seems to knife better at about 1/2 throttle, but has more coupling at higher speeds... might this mean a visit to the the thrust angle issue?

ANywho... great plane, worth the money, seems well built and like was mentioned before... feels comfortable right up front... easy takeoffs and crawlingly slow landings...

(Oh, and I have just basic Futaba 3004 servos... the only hting I changed was to use 4/40 pushrods and metal clevis')

just about to pickup my hitec servos for the ucd and noticed that they are rated different (torque and speed) based on the battery pack used (4.8 v 6.0). I'm new to this so can I just go out and buy a 5 cell NiMH at 6.0 and plug everything in? Or do I need a special receiver etc? I'm using a hitec 7ch receiver and a futaba 9ca tx...

thx

davey_flyer:

You can get a 6 volt battery and shouldn't have any issues... Some people have experienced "jittery" servos because of the extra voltage and some will go the extra expense and purchase a voltage regulator...

However, in most cases where there are servo extensions (like the 5 you will use in the UCD3D, the resulting resistance seems to eliminate servo jitter...

I have several 6 volt packs (without using a VR) and have never experienced a problem.... there IS a noticable speed/torque increase too...

Lastly, depending on the momo you are using, you may still be nose heavy... that extra cell may come in handy to balance it out nicely...

Enjoy that plane... it rocks...

I am one of the unlucky ones to get a damaged wingtip straight out of the bag. I'm contimplating just fixing it if I have to send it back and go thru that hassle. what's the procedure from greatplanes, do I have to pack this thing back up and send it back or do they just send out a new (hopefully undamaged) one?

First step is to contact who you rodered it from and tell them it is damaged...

If the packaging looks damaged, it's the delivery company's problem, and you dealer will have to arrange for them to pick it up from you. (He should then be able to send you another out right away)

If the outside packaging is NOT damaged, then the fault lies with Great Planes... Still yet, your dealer should take the plane back and replace it... then he can return for credit or replacement.

If the dealer isn't helpful, then you can send the wing Hobby Services with a letter describing the problem... they will NOT just send a wing out without first having the broken one...

Sorry to hear of your wing... hope you get it resolved quickly...

Wagas ; Try different props on your TT 91 before giving up on it. Try something with more diameter & less pitch. I hope to have my UCD3D flying this weekend, I'm using a YS 91. Hope the prop info helps. Later

Wagas, as Roadhor said, try a different prop. A 13-8 is more of a pattern prop designed for steady speed. Try an APC 14-6 or 15-4W as these will help with with verticle torque.

I'm hoping fly mine this evening.................Later...........Mark

Moridb:

Thanks for the info. Just so I make sure I understand then, I don't need to get a different recevier for 6.0V?

thx

Not as far as I know... you mihgt check with the receiver manufacturer first, but I'm pretty sure it'll accept 6 volts...

davy_flyer ; I'm using a Hitech receiver with a 6volt pack in my Cap232 , no problems at all. Just faster & stronger servos.

Didn't read that you had said Hitec Davey FLyer...

It and Futaba are what I have run 6 volts on...

have fun!

Thanks Moridb and roadhor for the help, I've just purchased a 2700NiMH 6V from superbatterypacks.com

Regards,

David

Got a few more flight today, however the motor is still in break in mode. Mixed in spoileron, and it waterfalls like a short moment fun fly, fast and straight down. Wingtip spins are fantastic. With the spoileron activated and with the sticks in a inverted flat spin, it did this flipping, corkscrew, flat type of spin, most interesting. Still did not add tail weight, however I think its a tad nose heavy, cause I need to push just a bit to hold inverted. Tank is over the CG so regardless of the fuel level, its equally tricky.

Wanna learn how to hover, get a UCD, almost too ez to hover and torque roll.

I'd say that the plane would be great with the new YS 110 (same weight as 91)

Flew my UCD 3D for the first time this evening. What a neat flying plane. Very smooth at slow speeds. Seems to hover easily. Only got to fly it twice as it seems I have a popular frequency that I need to share. (6 guys at the field tonight, 3 of them on CH 52...guess what channel I'm on ) Can't wait to fly it again. Like someone above said, it feels so comfortable on the first flight that you'd think you were flying it for years. I'm happy

............Mark

roadhor & OnTheEdge: Thanks for the tips guys, I'm using a 13 x 8 prop only because I can't seem to find a 15 x 4w at my LHS yet and I hate to order just one thru the mail. I will get one in time and hope to have some better performance.

OnTheEdge: I know what you mean about channel 52. I have that channel and almost used it in my UCD but decided to go with 46 instead.

I know what you mean. Paying $7 shipping for $8.95 prop. Just have your LHS order it for you. I believe Great Planes stocks/distributes APC props and all hobby shops order from GP.

Where is your UCD balanced at. I know the book says 4 7/8"

I haven't mounted my cowl yet. But I can only get mine at 5 1/2" Battery is mounted all the way forward. I am using a Saito 91 w/ 15x4W and chrome propnut..

I haven't flown it yet. I should have it ready to fly this weekend.. do you think 5 1/2" will be OK on the CG. I don't plan on mounting my cowl untill I know the Saito 91 is going to give me the performance I want.

Also what have you got your rates set on.