Java, I had hitech 605s with a 645 on the rudder. Switched to JR and before long I started experiencing servo drift. With evey stick input the servos would stop slightly off center. I was constanly re trimming the control surfaces before I realized what was going on. Flip the sticks 2 dozen times and the elevators would be off by 1/16" 2 dozen more reps and they would be off by 1/8" etc. Switched to JR digitals. These things are sick. You can not appreciate digi's until you try them. As far as carbon vs 4/40 rods my choice was determined by the weight that I needed on the tail to compensate for the Saito 100. I go for useable weight when balencing. No "lead sleds" in the hanger. Joe

Morning guys,

I used Hitec 475's all the way around on mine. Set throws at 50% on ailerons and 60% on the elevators with 90% on the rudder. This of course would vary depending on control arm set-up. This past weekend I found out something that I had missed. I usually use a Y-harness on the ailerons on most of my planes. So, when resetting the ailerons back from 100% to 50% I changed ch-1. Needless to say, the other aileron on ch-6 wasn't changed. I flew it maybe two or three times before I realized the error. No big deal, but the plane did respond a bit squirrelly. Then I realized the error and made the correction. This calmed things down a good bit. I then added 5% more to both ailerons for 55% on both. First time using Hitec servos and very pleased so far. I usually use Futaba on everything. The value on these was hard to pass up. I have heard a good bit of concern about the landing gear block. Guys, it's hard to imagine setting this airplane down with a hard landing. On final it's very responsive to the elevators, which will hold the nose up and allow the plane to land much slower than a trainer. It floats down almost in a harrier to the ground. Conversely if you are using a grass field I could see a potential problem. Remind me that I said this when I bust the gear out.

Kro, 5 cell 1700 mih. You already know the torque advantages. On top of that it will fly all day on a charge. Its not too big, I'd like ly-po's but would probably have to tape it to the rudder to balance. 5 cells are better in the colder weather as well. Joe

Roger, You got that right. You can run this bird the length of the runway just on its tail wheel. It floats like two feathers taped together. Joe

The 3mm clevis's should be just fine.....JW

I ordered Hobbico 4.8v 2000mah hydromax battery's ,I'll post the report after I get them....
RFW1953...I set my throw's @50% on all surface's (low rate ) and 140% on all surface's (high rate) except rudder It stay's @ 100% all the time...at 140% they look like barn door's swinging in the wind.....U-can-Do box corner's ...LOL...JW

Joe ... What causes this servo drift ...any ideas... got me worried now ! !
Dave.

Ken ...Bet you've got a better selection available to you over there in the carbon rod stakes ...i stumbled accros the irvine ones by accident ..they really are nice though..i'll definately send photo tomorrow.... if you lik the looks ..and cant get any... hard to imagine... I'll send ya some ...free gratis..

Dave, I don't know. They were fine all season on the Futaba radio gear. I switched to JR. TX 8103 and RX R945 duel conversion PCM. I thought I'd use the Hitechs until I got some money. It didn't last long. As time went by I had to re-trim the plane. It eventually got worse. I thought I was going nuts. It got so bad in the end that I couldn't get a tank through it without adjustments. Compatability, old servos, who knows. From what I understand the Hitechs are sloppy when it comes to centering. The 605s I used are discontinued. Joe

i thought you said the JR's were drifting in the post higher up. Im worrying now to i just ordered hitechs at my lhs but i can always cancel it they told me.

*what model JR servos are you using?

another question i have is about the 8103PCM radio. I have a older JR 6 chan right now but i really want to upgrade in radios. Does the 8103 PCM come with higher end servos other than the standard 537 or whatever they are. and if it does would they work for the UCD?

Joe ..I'll go see some of the ' Grey beards ' & boffins at work today....theres a reason for this i'm sure..

Java, JR is now offering "Flex Equip" customized radio packages that you can choose what servos you want. I went with standard on the throttle, DS811 for ail. and elv. and a DS8231 on the rudder. Joe

OK sinners, I've been thinking. I know its dangerous, but I can't help it. Donations at the "Ministry of Aviation" have been stark to say the least and considering how faithfull my Saito 100 has been, as well as the fact that it is a good power to weight ratio, I will stay with the 100 and use a regulator. Forgive me for not sinning. Before I peel any of those pressed and stacked bills out of the collection boxes, I think the money would be better used on something different. For another $100.00 over the price of a YS110 I could finally get into a small gas engine. Also I've been looking at the 28% Extra 300XL from Wild Hare as well. At the moment its a "wet dream" that will not immediatly divert my fascination of the UCD but still, it is a goal. Still in thought, I've also wondered how the UCD would fair with an electric conversion. Brushless moters have come a long way in competing with the nitro market. I gotta stop thinking. Joe

I realize this is getting bit off the UCD subject, but wanted to help Joe in his sinful sate.

I have a DA-50 in a Pitts BIPE and love it. I also have the WM Giant Extra 300. Used a 160FX in this one. I have seen it fly with a gasser and the 160. Flies very well with a 160, but not a 3-D machine with this power. Based on your 3-D desires, I would think gas would be the way to go. I had thought real hard about putting a DA-50 in this one as well, but the price of the 160 bit me. Seeing that I had just replaced the Pitts after losing the first one, including the engine, I just couldn't get myself to purchase two gassers at the same time. I haven't flown the Extra yet, but just about finished with it. I've included pictures of both the Bipe and the Extra. WM did a fantastic job on this ARF kit. The best I have seen to date in ARF's. Cowling and wheel pants are superior. Very well constructed airplane and everything fits together nicely.

just FYI for those who care [>:]

my servos on my UCANDO are:

Rudder- Hitec 5645mg
Ailerons- Futaba 9202's
Elevator- Futaba 9202's
Throttle- Futaba 3004

think they are sufficient [8D]

RF, theres not much left to be said about the Pitts, its one of those "gotta haves". My friend Tom, scratch builds and competes with the "Weeks Solution" bipe. Sells them too. WWW.simodels.com Here he is with two models. The larger has a 150 twin. Check em out, Joe

Here is another on that he built for a club member. This one has an onboard air speed indicator for setting your stall speed with a remote receiver. He low passed this bad boy at over 100 mph down the strip without *****g the throttle. Joe

You are forgivin .....As long as the Ministry of Aviation get's a Extra 300 Some day......JW

Tom has 2 and i'm sure he won't mind you keeping one at your house.....For safe keepin's.....JW

Joe, Wow! Nice looking Bipes.......You either love-em or hate-em. I just had to have one and really enjoy mine. It can be a bit squirrelly on take off if you get throttle and rudder happy. Once in the air it flies very well with no bad habits. Lands better than the Giles. This is my second Pitts. I was sick when I lost the first one due to my own stupidity. Immediately went out and got back in the saddle with another one. So far so good, though I haven't been flying it much due to the weather, and messing around with the UCD. I used the UCD to get my wings back after not having flown for a good while with all this cold, wet windy weather. Tomorrow is looking pretty good and the weekend looks like it will be great for flying. I will probably get the Giles and the UCD out for the weekend. Hopefully the Extra will be ready to maiden next week and then I will get the Pitts back in the air. Engine still isn't completely broken in yet, but the DA-50 is simply a wonderful engine in this class. Shoot, pick any of the 50 cc engine out there and you can't go wrong.

Matt, I think you are fine with the servo selection. Should do well with those. How soon before you are finished?

Roger, those bipes that Tom builds are very well mannerd. He handles that thing better than I could walk. If the 42% has lets say a 90" wing span, on take off he does a snap roll at 48" off the ground. When that bipe is in the air all other planes land, no matter where he is flying. Schweet. Joe

Roger..Joe ..JW et all...
ARRRGGGHHHH...she's had me fitting bloody curtains all day ( drapes..? ) ...cords , pullys...switches.. it would be easier to fix something up to open/close..raise or lower London Bridge...![:@]..
Anyway, anybody know what the thread size is on the YS exhaust...Dia X pitch..?
Next .whats the (v.latest) general concesus on the .46 UCD..? what Motors..? ..I noted that its wing loading is even less than it's big brother...i 'm aware ther's a seperate thread on this....thought i'd ask here first.
Finally ( UCD .60)..what do you think to a pull/pull rudder with the servo inboard (30" further forward)..? how did you guys do for c of g .....YS is 5oz heavier than O.S.,
O.K few things to nail down , ele servo wires in tubes, pull/pull cable runs through fuze sides & formers...new servo mount...but would the benifits outweigh the trouble..?was intending to put tank over c of g... i've not actually cut the covering from the fuze over the servo holes yet...regards..Dave.

sorry to hear that you had to do house work /honey doo's.......... I'll see if the thread pitch and diameter is in the owner's manual ....As far as the UCD3d-40 The only problem Iv'e heard about is the stab's not holing up ,I don't have one so I can't speak first hand ,Just what Iv'e read in this forum....but you can put 91's in them..... maybe even a ys 110fz ....BWHAHAHAHA ...I my have to look into that....as far as the CG I have mine just behind the stock #'s in the manual...If you use the YS I would put the rudder servo in the rear like Father Joe has done .... this should keep you from adding Penalty weight to you'r plane......No lead in the ass....I'll go look in the manual for diam&thread....Well it isn't in the manual....Anyone else have the info LL is asking for....?????....JW

Dave, now that you are finished adding a touch of the sublime to wifey's windows, have a beer and think about what your asking. With a 21 oz. Saito up front its about balanced with servos in the rear. I'm at 5 3/8" to 5 1/2" With a YS 110 at 26 oz. up front you now want to put the rudder servo to within 10" behind the CG. Put the fabric swatches down and give yourself a good shake. Wifey has got you whacked. This is not "Better Homes and Gardens" This is serious airplane stuff. A simple wayward thought about soft pastel colors or the correct distance a drape should be off the floor, could result in disasterous consequences at the field. Are we not men? Get back to the shop and pray that you can mentaly crush the demonic decorator invading your innermost thoughts. The Ministry may have to set up an intervention hotline. Good luck, Joe