The link for the tech notes does not work on the servo page, hindering my evaluation of what they are offering. I used to use HiTec. 605s with a 645 on rudder @ 6 volts. They are good for the price. I know this is a replacement for the discontinued 605s. I hope they improved this model. The center points were a little wide on the 605s, they were strong, but I ran into a problem with servo drift. Don't know if it was due to age, incompatability with JR or what. Thats my only experience with them. Joe

2 hour response time, not bad considering the low pay for research.

Lord, dosn't look windy in the pic. I can't see any vegitation moving. Joe

Oups ...sorry..! O.S. master...

Pre -occupied with the UCD.......after all the work and preperation...i wanted to run this thing up ...MAJOR PROBLEM...[&o]....cant find an allen key to fit the bloody Tru-Turn spinner..Bo***c*s......bet she's hidden it...!.......not to worry trivia really....

Right ...I looked at these new Hitec thingies ...like you say not a bad price ...Tower aint got any at the mo though...Servo city have.... But ...a tad on the heavy side...? what motor are you going to run ?..... not to many two strokes about.... you need that torque to swing a big prop that a four stroke gives ..got any plans on your rods and clevises..?. keeping the stock tank ..? muffler...? loads a stuff to toss up in the air, way before you start...

Hi Guys,
Never fear sooner or later I'll give you guys an evaluation. I am going to set mine up on my Hitec Eclipse 7 transmitter, QPCM receiver, Hitec HS 635HB sevos on the elevators and ailerons, an HS- 425BB on the throttle and a HS-645MG on the rudder. I think you guys will agree that will be enough!! Who wants to get silly and spend $50.00 each minumum for digitals?? That stuff in my opinion is for guys who want to fly competition (Or Wildhare Guys, Right Joe??), not sport fun fliers. I know one idiot who has four digital servos on a $100.00 ARF fun fly just because he thinks it gives him an edge. Joe, I'm still confused about how to drill the Ernst thrust plate. Can you e-mail me directly?? No rush, I'm sending the 91 back and swapping it out for a 100. Lucan, how about I just ship this whole thing to England so you could do a similarly "smashing" job on mine?? If you guys are interested in Hitec Servos and stuff, try donalds-hobbies. He treats people right and will better some prices if you ask him. Free shipping on orders over $100.00.

Joe. Joe. Joe...
The vegitation IS very still...Im not... It's turning into a beautiful afternoon.... Ted's just phoned..."Are we going then..." Go away.
Problem #1 solved ....problem #2 appears..... .91FSIIP...fired up perfectly.... but with needle valve for .91FX fitted..... cant lean it out enough to run below 1/2 throttle without the glow attatched.... the correct needle is in my desk at work...i think...still turning the house upside down...!

Stoney, I agree, these are not for the everyday sport flyers. In all applications you can overkill anything. I too was of that same mindset until........I got some digi's. Don't knock them until you have tried them, in the right application of coarse. They are sick. The centering is is like .01 with almost no deadband. They also boast a more consistant torque range within a full 60 degree of travel. Lightning fast and strong. I find myself constantly upping the bar in this sport of continuess upgrades yet, remain realistic in the amount of models that I own. Three. Joe

Just to comment on Joe's comments on servo choice for this bird here is my setup:

All surfaces have Futaba 9202's and a Hitec 95645mg on the rudder. I think its a decent setup and once I get done with this bird I can move to another plane and move up in size and not have to worry about buying new servo's Thats the logic I used when buying them

now I need to go back and re-read the posts regarding pumps and regulators. ahhh!! the work never ends. [:@]

also want to ask if anyone knows a cheap supplier of a remote glow setup? want to install on this bird

We think alike. With the pcm reciever and the digitals I'm a quarter of the way to a larger gasser. Here is a pic of my assistant hovering at the front of the UCD plant. Joe

On the digital subject,
I just couldn't justify that kind of money for this kind of aircraft and right now I can get a deal four Hitec digitals from Tom at Wildhare for $200.00. Then if I understand correctly, one must purchase a digital servo programmer and I think that's another $125.00 or so. I just didn't believe that guy put $250.00 worth of servos on a $100.00 ARF!! Now in a few months when I have the funds for the Wildhare Edge 540T, Watch Out!! That will be another story. Joe, my e-mail is [email protected]. Need to get with you more specifically on that engine setup. Other than deciding if I'm going to move the fuel tank back or not and going with the Cline regulator or not, I should pretty much be home free. Have a good afternoon all. Brian...

Stoney, here is a pic of the thrust plates drilled for the mounting bolts. I did not drill the center. For my application the fuel lines come out below the engine mount. Its a simple matter of "cypherin" to quote the greatest mind of all times, Jethro Bodine. Find the center lines and distribute the holes equally. If in doubt try it on paper or light cardboard first. Let me know how you make out. Joe

O.K. Joe,
So to simplify this then it would seem that if I transfer the template from the GP 91-120 motor mount (I had a spare from my 4* 120), to the thrust plate I should be in business? Thanks..

Lucan may I ask where you placed your fuel tank? I forgot if you did post it earlier [sm=stupid.gif]

Joe I like the pic of your assistant flying in front of the UCD factory.

All of you wheres the cheapest place to get a remote glow unit? hmm..a remote glow unit..that means its a G-Unit...nevermind..

Yes, thats Jack, faithfull assistant and aerodynamical wizz. Don't know if the pics went thru on the PM so here they are. Joe

Matt... Here we go .....three easy stages...#1..offer tank up....#2..nail it in....#3.. fit fueler...

....a walk in the park...!....found needle for .91FSIIP....motor spot on now....panic over..!

Joe thanks for the pics! makes sense to me now.

Lord Lucan cheers on the pics mate. Your not using a pump? Motor has no problems with the longer fuel lines?

What kind of remote glow is that? I have never seen one like that, it is kind of nice..

As I have been watching this I had to wonder about a bit of overkill. I have Hitec 475's throughout with the exception of the throttle which is a Futaba S-148. Using a 4.8 volt system. I'm normally a Futaba die-hard, but thought I would give Hitec a try since the price was very attractive and I had heard good things about these servos.

Some will say my engine mount is an overkill and heavy. In the end it's all about what you feel comfortable with and how the airplane flies. I just read a thread tonight about a guy with a stock tank in a UCD who had the stopper come out, and fuel soaked his airplane. I always upgrade the tank.

It's hard for me to compare whats right or wrong since this is my first UCD. Joe, having had three of these is by far better informed than any of us on this airplane. I feel this way about my Giles. I have had 3 of these myself and then helped my son with his, so we have had as many as four in the family. No better teacher than experience. I have about 50 flights on my UCD now and the original prop with not one ding in it. Now watch me bust the snot out of the prop this weekend [X(]

Joe, Dave have you guys weighed your birds yet? Mine came in at 7 lbs 14 ounces which I think will be on the heavy side compared to what you guys should get. Will be interested in hearing about this.

I'm not using a pump on my Surpass 91 FS, but then my tank is well forward of the CG in the nose. I tried moving my battery back, and for the life of me end up quickly becoming tail-heavy. I am right on the hairy edge as I have it set up at 4 7/8 from the LE. If I move it back even just a tab the plane shifts to TH. I think the shorter engine mount may have contributed to this because my engine is not as far forward as yours with the stock mount.

Dave, your bird looks just beautiful. Very nice work. You assembled a great looking airplane that's clean and neat.

Matt...
Had a NIB O.S .91FSII, sort of ...well ....spare.. and a new .65LA wich i new i would never use realy, so i spoke to Paul @ " Just engines " gave him a load of O.S Part #'s And he ordered me all the bits to convert the .91FS to the 'Pumped' version in exchange for the LA...bit of ' Open crankcase surgery [8D] and...voila....91FSIIP ...ran this in the UCD last night ...marvelous....Expecting the 1.20 FSIIIP from Tower ...for the "Cyclone".....anyday now....

Nova,
It' the Pukka O.S. one ...real nice quality stuff.... as usual from O.S....! only $16.99....fit and forget ....

Roger
Thanks for praise on UCD...i'm well pleased too...It all went together v.well...thanks to Yourself, Joe, JW...where is he again, has he still got snow..?..! and all the others on RCU ...

I think this is what RCU is about...it allows you to toss all your ideas into the air, discus all the pro's and cons ...then settle on what's good for you, people will allways have slightly different approaches to things ...but hell..thats what life's about yeah..? ( Thanks to RCU and all the threads i've read on this subject, i've developed a paranoia about pressurised fuel tanks........if it was'nt for the pumped versions of the O.S. .91 & 1.20 FS...i wouldnt sleep...period..)

I got the same servo's as you ....cept on rudder,and the low profile version for ailerons, i'm sure there's no overkill there, your ally mount ..got on of those too, thier actually lighter than the GP ' stock ' one.. moving the tank has been good... this UCD balanced perfectly... adjustable by moveing the pilot for or aft, or changing the prop...i'm going to get an APC...15x6 today, as opposed to the wood Zinger thats fitted ...1oz difference @ 10 + inch from the C of G

She came out finally @ 7lb 12oz ..stock wheels though..you upgraded yours yeah.. ?

Better go for now ... were of " Tadpole hunting" this morning.... Why not...the UCD's finished.. the suns supposed to shine ....i've Just put the ailerons on the " Cyclone "...

This is the best....

Just when you thought it was all over....." New 1.20 UCD released for christmas...."..Ho.!Ho.! Ho.! Merry christmas ...

Weighed my UCD.............. I'm not talking! I need a second opinion from another scale. And if I don't like those results, I'm going to the post office. If the first scale is right, I'm going to need some prozac.

David, David, David, You sound as though your mind is made up as to maidening this much labored project, with a 6" CG. If it works, good for you, you won't have to go through the hassle of moving it back later. If it dosn't, did you consider how the degree of hassle spikes through the roof? That is 1 1/8" beyond the recomended on a .60 size craft. At 5 5/8" aft is about where you begin needing to land with down elevator. After that you flat out need to force it down. Its not a comfortable situation to be in on a plane that you have never flown. Its not easy to get used to on a plane that you are very familiar with. Just food for thought. Good luck, we're in your corner. I usually maiden mine on my buddies full scale air strip. Its so long that in the event of imediate trouble you can set it down without any turns involved. Joe

OMG JOE!!

Full scale airstrip? Hook a brother with some driving directions to where you fly!!!!

Whoa....Joe..
I'm upset...[].. I was skipping throu all UCD related stuff and saw in post 2067 that " Striker " had said HIS C of G was ".. right on the button @ 6".. in that little itsy bitsy line of mine i mearly tried to ask him if ...well, that was right ... should be 4 7/8" yeah..?...
Trust me .... after all we've been through..! Now say sorry...

My C of G is set @ 1/64 forward of 4 7/8.....

Ah, com on Joe. I want to hear how much Frankenstein weighs. So, The banner baring dead weight hater as finally found lead in his boots. Just kidding. What was the final verdict as is? Could it be that it weighs more than my flying tank? LOL

Dave Ole chap, the tiger by the tail is going to bite you with the CG so far back. I wouldn't go there. Talk about the wild thing. Don't say you weren't well advised before taking this most assuredly final step toward full time drape hanger.

I can hear it already. Took off most bountifully straight as an arrow until me bum dropped. I had to force me will on the eleva'tors to get me bum up and me crown down. As me crown waggled up and then down - up and then down- over and over until, me crown smartly made impact in the glen creating an enormous commotion. To my absolute astonishment, those darling little wheel pants were now magnificent bumper bullets on me wing topsides. Sent in the spirit of international admiration from one RC'r to another. Let me know when we should show up for the drape knighting ceremony.

Matt, It is a great place to fly. His dad, who is 73 and an avid flyer of a full scale "Citabria" who thinks nothing of a flyby at about three feet just to wave to us, also has a "Cherokee". My buddy keeps the strip open all winter for a few of us. Its our testing grounds. You would like it.
Lordy, It took "Striker" many air miles to get to that CG. Again, I've got some hours on a couple of these and just got to 5 1/2". Regardless of my familiarity with the UCD, this one, as well, will maiden with suggested throws and CG. Since they came out I built five, one was for a friend. My four came out predictable. His, out of no where, needed the 5 cell battery under the tank to balance. Same model, different plane, go figure.
Roger, the tests are not complete, but I do have a pic of right after we took it off the truck scale. Joe