U-Can_Do 46 Size - RCCanada - Canada Radio Controlled Hobby Forum
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Old 08-14-2004, 06:03 PM   #1
Steven Dew
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U-Can_Do 46 Size

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Just wondering what engine to put on the
Great Planes U-Can_Do 46.
I have a new Webra Speed 50, but am considering
buying OS FS-70 Ultimate Pump, 4 stroke.
Never had a 4 Stroke, but maybe this would be the
time to start.
What prop should I use with either of these engines? : :

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Old 08-14-2004, 07:27 PM   #2
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hey I have the 40 size UCD I'm using a saito 91 for power with a 15x4w prop, this is the perfect compination, I would not have ANY less motor if you have any intention of doing 3d type maneuvers...and you know it is a big plane when you get right down to it. Thats me two bits

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Old 08-14-2004, 10:44 PM   #3
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Do you already have the UCD? Because if you don't I would seriously look at the Hangar 9 Funtana 40 size. I've had both the UCD 46 and the Hangar 9 Funtana and I must say that I like the Funtana more. I like the Funtana more because it's more of a 3D plane whereas the UCD is more of a funfly plane. The build quality of the UCD, I felt, was somewhat lacking. It is a rather flimsy aircraft whereas the Funtana looks much nicer and seems to built a bit sturdier.

I have flown both with a Saito 100 with a APC 15x4W prop. I could never get the Saito to run right on the UCD and I believe it is because of the pathetic tank placement. What was Great Planes thinking? I think the tank is way too high which was causing the engine to continually flood and stall. I first had the Saito in the UCD but I now have it in my Funtana and it works really well. It's got more than enough power for ANY 3D type maneuver you may want to attempt. It is surging slightly at an idle but I think it may be due to an airleak somewhere's around the carb.

As far as engine choices go you've got to ask yourself what you want to do with the plane. If all you want to do is basic aerobatics (loops and rolls, stalls) then you'd be ok with using the Webra 50. If you want to do some basic 3D stuff then the OS Ultimate 70, Saito 72/82, YS 63 would all work great. If you want to get into the advanced 3D aerobatics then you would be wise to go with a Saito 91 or the Saito 100. I myself wouldn't go with anything less than a Saito 91 but I'm trying to get into the advanced 3D stuff. In my opinion the OS 70 Ultimate is a bit overpriced. I have a Saito 72 on a Hangar 9 Twist and it is the sweetest glow engine i have ever owned. It is working so good that I wouldn't trade it for anything! I'd buy another one in a heartbeat.

I'm doing a review for RC Canada on the 40 size Funtana. I'll have a full write up with some pics and some videos in the near future so if you want to see how the engine and airframe performs you should check it out.

You'll get all sorts of different opinions about airframe/engine combos but youv'e got to choose whatever works for you. Hope this helps!
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Old 08-16-2004, 05:53 AM   #4
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Morning Steven

Here is a product review of the UCANDO .46


I am installing a new OS .70 4 stk in mine.

Don Dow
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Old 08-17-2004, 07:54 AM   #5
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Good Morning Chris/Treecutter

Just noticed that you live in Sask.

How many feet above sea level do you live?

I learned to fly full scale in Lethbridge, Alberta at 3,000 feet above sea level. When I joined the navy and moved to Esquimalt/Victoria/Pat Bay. We were flying at sea level. What a difference or should I say what an improvement in performance.

I suspect that out on the prairies you guys need much more power.

I would suggest that Steven go with what he has, a .70 4 stroke. My nephew in Missassauga Ont. and a friend of his fly the UCANDO 90 with the Saito 100 and both are very happy with that combination.

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Old 08-18-2004, 11:45 AM   #6
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I had never had a 4-stroke untill I bought a Saito 100 for my FuntanaS 40 and it is a great engine. Very reliable and powerful for unlimited 3D aerobatics. The extra power is good for situations where you need to blast your way out of trouble (which I get into alot )
I run an APC 15X4 W and it works great!
"The only way of discovering the limits of the possible is to venture a little way past them into the impossible." - Arthur C. Clarke
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Old 08-18-2004, 11:30 PM   #7
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UCan Do 3D .46

I am in process of assembling mine

engine GMS .76 with a 14 x 4w APC prop
Tru-turn spinner
and a Sullivan 12 oz flex tank
Hitec 605 bb servos except for rudder 645
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Old 08-18-2004, 11:41 PM   #8
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Hey Dondow, we're at 1653 asl here in saskatoon, There is a little difference, but I KNOW I would rather have a saito 100 on my plane than the 91 that is currently there, sure mine hovers great with the 91, and pulls out pretty good, even on days with a high density altitude, no problem. There is no doubt that the .72 will fly the plane well, I just think that it will leave him wishing for more power. By the way a 4-stroke is THE way to go, they just work so much better for this style of flying and are really easy on fuel to boot. Have fun!
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