Topic: U Can Do 3D .46

Thinking about getting one of these for Christmas (i hope - droped a hint at the missus, my LMS has one in stock).
Anyways has anyone had one of these here in the  UK, what do you think and most importantly what engines have you used on it.

I have read the RCU string on this aircraft and i really cant decide what the best way to go on the engine side of things.

If anyone is keen and it has not been done i can do a step by step for the forum... (If i get it, fingers crossed)

Cheers
Squid

Hi squid,

I'm putting together a UCD 60 at the moment, obviously a little bigger but similar construction. I also read the review on RCU and I think he used an OS70Surpass. I'd probably recommend a West 50T1 if you want to go 2 stroke, I've got one in my capiche 50 and its great! If you wanted to go a little cheaper then I'd go ASP 52S, which I've aslo got in a freestyle 3d again very nice powerful motor. If you wanted to go 4 stroke, I'd say YS63 or Saito 72 (or 91 if you're feeling brave!) I must say i've not yet seen a UCD 46 (I'm the only person I know with a UCD60) but assuming you want lots of power for 3d all those engines should do the job well.

Whilst building mine I've made a few mods mainly based around what people on RCU said but also based a bit on experience. I've done or will do:
1. Tank on CG as I'm using YS91FZ
2. Reinforced undercarrige plate.
3. Reinforced Firewall
4. Flying wires on the tail.
5. 3 degrees of sidethrust with washers
6. Upgraded all pushrods to 3mm carbon tube
7. Improved the geometry of the 2x ele servos
8. Made a hatch at the rear to accomate the battery for rearward CG

I don't know if any of these will help you with the 46 but in my opinion will make the UCD60 a better model. Hope this helps......

Andy

Hi Andy
Thanks for the inputs.
My choice on engines are a little limited at the moment in this capacity range.
I have the choice of the following:

OS Max SF 46
OS Max SX 50
OS Max FX 46
OS Max 70 FS Surpass series 1

I am considering either the SX50 or the four stroker.  I have an FS91 as well but unlike a lot of the fellows on RCU i think that is OTT.

Will be looking at the mods because i think it is far too soft.

I have seen a UCD60 at Warwick racecourse two weeks ago - amazing aeroplane

I would agree the 91 is OTT for the UCD46! I reckon if your series 1 OS70 surpass is going well and reliable use that. And if you prop it with an APC 14x4w it should be a brilliant combo. I think you might be a bit disappointed with the 46 2 strokes as they're a bit lacking for good 3d, whilest the 4 stroker will swing a bigger prop and have been throttle response.

Were you quite impressed with the 60 size then? Mines a good week or so from flying yet, hopefully I'll get to finish it over the holiday. I'm going to buy the servos tomorrow, Futaba 3010s on elevators and ailerons, 3001 on throttle and Hitec 5945 digi on rudder! And all that just before Xmas!

I was very impressed with it, the guy had a OS 91 FX on the front end and the proformance was mind boggeling, only hope the little one can do the same.
I was inclined to try and get the bigger UCD and use a Webra 90 two stroke i have holed up but beggars cant be choosers.
Ran the 70 FS up today and test run, only on 0% but it turned a good whack with the 13*8 i had on the front end, i will need to get a 14*4W and see how that goes, it was turning around 8k on the 13*8 Master, so should be fine.
Cheers
Squid

Out of interest any ideas on how to get my paws on some APC 14*4W, check a couple of hobbies stores and i cannot source them.
Thanks Squid

Sent you an IM re APC props.

Thanks got it  

Archie at Island Hobbies has got them, well leastways he did have last week till I bought some off him. Maybe I bought all his stock. Cheaper than UK shop prices too (£10.25 + possible VAT if you get caught, as against £12.50 in UK shops if you can find them) and come by post a couple of days after ordering.

www.islandhobbies.co.uk

You tried Just Engines?

keith  8)

Archie at Island Hobbies has got them

Thats who I suggested! 10-1 he'll have them. Is anyone else other than Squid or myself flying/constructing either of the U-Can-Dos? It would be interesting to find out what people make of them, which motors people are using etc?

Andy

Try http://modelairplanenews.com there's an article there on the 46 sized version, it uses an OS 50 SX.

Hi
I tried the JE website, not actually calling them and the web does not show any of the more "exotic" props 14*6 is the lowest pitch.
I will give them a call and see what they can do, i need to get some other bits from them anyways.

Cheers
Squid

HI
I have the Model Airplane News with that article in, article says it worked well with the 50 in it, just i have heard some sad stories about the OS 50.
I have a new 50 to hand just wondering which way to go with the UCD - 4 strokes or 2's
Cheers
Squid

Squid

The UCD 46 that's reviewed on RCUniverse uses an OS70 Surpass. I think the reviewer said that it really suited the model well. Theres plenty to read on it and there's even some videos to download too. If you can find the 14x4w then I reckon there's no other way to go!

Andy

That's it then, UCD46 with the OS70 - should be a laugh.

Let you know how it goes - I have been given strict instructions i not allowed to start on it until the 27th -  

Cheers
Squid

oh well, nevermind! At least the weathers Carp, just think if it was nice!Any joy from Archie with those props?

UCD has been delayed for a couple of days due to unforseen problems - hopefully have it in my mits next week.
Have not got hold of Archie - will do that next week as well.

Squid,

made any progress on the UCD 46 yet? Did you have to modify any parts of the build?

I now have 3 digi servos (5945 for rudder and 2x5925 for the elevators, so knife edge walls and very rapid upright and inverted walls should be possible!) which I'll be fitting this weekend to my UCD 60. Should see the first flight end of January....

Andy

HI Hercmate
Had some delay in the delivery process, Santa must have thought i was a naughty boy last year, expect it too arrive end of next week, be a rapid build and i hope to have it up by the end of Jan as well.
On the servo side of things i will be using Hitec 422 for now on ail and ele and a 9303 on the rudder, first plan will be to swap out the aile servo higher spec (standard digi's) and then the ele servos.

Well my UCD finally arrived today , just unpacked and getting ready to start putting it together.

You've unpacked, but are still only getting ready to start it! I thought I was slow when it took me 1.5 hours to start  

Well finally starting to get things together on it, got to go down to my LMS and get some servo extension (thought i had some in the cupboard).
Debating weather to use my aging Surpass 70v1 or purchase an all new v2 or Saito,
Looks like a pretty good kit, goes together nicely, spinner and push rods are rubbish though - they will go.
Also thought about putting on flying wires on the tail due to some of the reports on the RCU site.

With the dollar at $1.80 odd to the pound, the Saitos seem a bit more reasonable. Wish I had bought one instead of an OS70FSII, as it is a lot lighter, but I bought it last June when the Saitos were around £200 and I got the OS for £150. If you are choosing now, I'd go with the Saito.

I am going over to the US next month, $ price of the Saito is 249 whereas the OS is 220 for the S2 and 299 for the Ultimate.
Think i will pick on the Saito

Are you talking about the Saito 72? If I were you I'd the whole hog and go for the Saito 91   Not much more weight but loads more power!

Thought about overpowering it with a 91, only problem is i have heard too many problems about the UCD lossing its tail section, hence the reason i want to put on some flying wires.

May be getting a U can do 60, do you realy need to use digi servos or could you get away with 3001s.

May be getting a U can do 60, do you realy need to use digi servos or could you get away with 3001s.

Zagi,

3001s are only ever going to be 'adequate'. At the very least 3001s on ele, and aileron, and a torquey servo on the rudder as it's huge!

Much better even if you're on a tight budget then go for 3010s all round or if you can stretch a little further the 3050s which are the 3010s digital equivalent.

Andy

PS See post 2 in this thread for the mods I made to the airframe whilst building