U-Can-Do with ST-90
 

Anyone out there flying the UCD 60 with the pre-chinese ST-90?
Would like to get some prop, fuel, plug choices to tweak mine for better performance. Thank you in advance for any information you might share!

U-Can-Do with ST-90
 

I think Tavis has had bad experiences with his UCD, not that you would have the same PeteJoMan. I havent seen anyone with that combo, but it may be a bit heavy. The popular engine is the Saito 100. I have flown the plane with this engine and it performs really well.

Tavis
 

The legend himself. :D

Tavis sometimes comes off as rough and abrasive, but he is a pretty good pilot and half way likeable............

You just have to put up with his ramblings from time to time!

Todd

U-Can-Do with ST-90
 

I agree with Todd. Tavis comes off like a 'flower child' (a bloomin idiot) but he's really a pretty good guy and a good flier. In a year he's gone from very basic flying to hovering, flat spins, low loops (it comes out so low he bends the gear, lol) etc. Jon

ST 90 w/MCP in a UCD
 

Yep! My UCD has a pre-Chinese ST 90 with a MCP spinning an APC 15x4w at 11,400 peak RPM. (The MCP cured the ragged mid range, and boosted the power by over 1100 RPM.) Plug is a Hangar 9 for ducted fans, but the OS #8 works good too. Fuel is 15% Mach 7 castor/synthetic blend.

m.gramling also tried a ST 90 in his UCD, but later gave up on getting his ST 90 to run reliably enough for a UCD. (I think he switched to an OS 91FX?)

Here's a link to a short movie of my UCD doing some hovering, an outside waterfall, and a low level wall into a hover. It's not much, but it shows that the ST 90 has adequate power for the UCD.
(note: for some reason the engine sound in this movie is very unrealistic. It does not sound nearly that loud in real life.)

http://www.eldonmo.com/video/ucando.wmv
(it's a 10 meg file so allow time to download)

And here's a photo of the UCD hovering.

U-Can-Do with ST-90
 

No I don't.

Tavis...dude..put down the crack pipe for a few, and maybe try to brush up your hovering skills on a simulator. Or do they have computers yet in in your neck of the woods..? Just because your planes fall out of the sky doesn't give you the right to bash others' choices for planes and motors.

There ought to be a Jerry Springer recruiter somewhere calling you soon.

Rick

U-Can-Do with ST-90
 

Thanks for the info folks, and Tavis, thanks for the good laugh.I'm having problems in the midrange on my 90 also, Dave, what pipe are you running on your 90?

U-Can-Do with ST-90
 

I'm using a mousse can pipe built from a Macs header and a 2"x10" aluminum hairspray can. It cured the mid range and flame out problems I was having with the stock muffler and made the ST 90 run good enough for use in the UCD. But it took a lot of experimenting and tinkering to get to this point.

Here's the URL of a thread I started about a year ago about using a MCP on a ST 90. Only m.gramling persued using a MCP on his ST 90, but he gave up after awhile.

http://www.rcuniverse.com/showthread...435&forumid=21]

HOLD THAT HOVER,STAY STILL NOW...thaaats it
 

:eek: Oh, That wasent my plane.I showed up at the feild one day and saw a U Can DO hoverin verry low over the run way.So,I walked right up and grabed it out of its hover and broke the little U CAN DO over my knee with it still runnin.It tried to get away at the last minute but I grabed its tail before it pulled out of the hover.I tore that freekin litle U CAN DO to pices!!![noding head with a smug look]the piolot ran to his car and took off,be cause he knows.
If any body'l showum, Ill SHOWUM!!!!!!
If any bobys ever gona showum ,ILL SHOWUM!!!
YEA!!!!!YEA!!!!!!!!!!!!!![jumpin up and doun rootin verry agressively] :boxing:

U-Can-Do with ST-90
 

sorry, i just cant get into that type of humor. I know he didnt break that plane himself (cept for stuffing it while flying) but even joking about stepping on planes and stuff like that is just not funny to me. Its like abusing children, theres no need to.

U-Can-Do with ST-90
 

Set the crack pipe down and back away, Tavis.

Your planes, others' planes , and the rest of us on RCU, will be better off if you do.

Rick

U-Can-Do with ST-90
 

Tavis,
Have you been drinking again? Jon

U-Can-Do with ST-90
 

Tavis is only funny in the Beavis & Butthead obnoxious kinda funny. I like watching B&B, but its kind has no place in forums like this.

Sorry, Beavis... uh, I mean, Tavis... let's be nice while we're playing in this here sandbox.

U-Can-Do with ST-90
 

Did he ever stop? :stupid:

Todd

U-Can-Do with ST-90
 

He never stuffed that plane. To my knowledge, his UCD is still intact. He took that one out of the garbage can and posed for that pic....

U-Can-Do with ST-90
 

I'm sure most of us figured as much. The humor wasn't lost, just inappropriate.

U-Can-Do with ST-90
 

What recommended prop should I run on the UCAN DO .60 with a Super Tigre .75? I just installed this engine yesterday and took it out for some flights with a 12x7. I don't have a lot of experiance in this engine size range nor with 3d type stuff so please excuse the ignorance. But The aircraft flies very well, but falls out of the hover. I'm thinking prop is an issue as the engine should be able to do it. I may be underpowered? I had a 91 fx with 14 by 6 but the 91 fx never ran correctly mounted upside down so I off loaded it to a right side up application.

U-Can-Do with ST-90
 

I'm running an APC 15x4w on my ST 90 w/MCP.

My nephew is runnng a TT Pro 61 w/MCP on his UCD spinning an APC 13x4w. It hovers and pulls out vertically at full throttle.

So with a ST 75 powered UCD, I'd suggest starting with an APC 14x4w.

U-Can-Do with ST-90
 

My ST .75 runs very well with a 13x6 for sport flying on another plane. For 3D stuff you'd probably better with a lower pitch prop. I would think either 14x4W or 15x4W would be a good choice.

U-Can-Do with ST-90
 

Dave, saw your video, great clip! Went flying yesterday with the UCD yesterday and really tried to ring it out. Still have the stock muffler and enjoyed some short duration hovering (still learning)at 1/2 to 5/8 throttle, but it will not pull out with authority. I really appreciate your input as far as the engine performance issue is concerned, (I'm gathering materials for the MCP this week) However, I would like to ask you one more question. When in high alpha flight, such as harriers, elevators etc.. do you switch in to flaps, spoilerons ? And if so, how much? Again, Thank you in advance for any assistance as I really enjoy this plane. It is truly a blast to fly!!!

U-Can-Do with ST-90
 

Although I have both flapperons and spoilerons programmed into my UCD, I hardly ever use them. The flapperons help tighten up loops and inside waterfalls, and the spoilerons improve elevators and outside waterfalls. But these mixes can get you into trouble in a vertical hover, so I rarely activate them.

So far nothing I've tried has stabilized the UCD in harrier flight.....except full left aileron to keep it rolling. :)