Update guys

just got mine in the mail today! very excited about it!

several issues I need to deal with:

- I got it cheap, only thing is it doesnt come with a cowl, Tower has them back ordered until later this month anyone know where I can get one now?
- I have a saito 91 but from what I have read its gonna need a 100 or the YS. Any ideas where to get the YS cheap?

Looks like I will be searching the classifieds here

matt

try chief Aricraft. you have to enter your e-mail address on the home page and they will send you the specials, I think the Saito and YS are on special

John

thanks for the info John, any idea as where to get a replacement cowl?

any of you guys have a used one you want to get rid of?

I am not planning to get another UCD at least for a while. I may wait for the Extreme Flight profile Edge and put the Saito 100 there, or build a Ohio Model profile Yak. Or I may get a WM Zero.

I later found that the cause of engine quitting is indeed low on fuel: there was like 3 CC left in the tank. Also, the clunk pick-up in the tank broke off from the fuel line, that's why it didn't pick up the last 3 CC I guess.

I think to avoid this situation in the future, profiles come in handy because we can see the fuel level with the exposed fuel tanks.

Hey UCD'ers. How many and what length servo ext's do I need?

For stock setup you'll need five servos for control surfaces plus one for the throttle.

I believe that I used three x 24" and two x 18" servo extensions

i have bot u can do's and the 46 balanced by adjusting the batery. the 60 took a little tail weight.

checkerboard on both

IRON BAY FUEL REGULATOR - someone mentioned this regulator in an earlier message. Where can I order one and what is the approximate price? THANKS

http://www.ironbaymodelcompany.com

I believe they are about 43 dollars, very nice quality, I was impressed

JOhn

Nosram, I knew I saw the picture of your rudder someplace. Could you please explain the rudder mod. as opposed to coupling? I'm not sure if I understand coupling but I do know when attempting KE with left rudder input the plane dives to the deck and to the left. The size of this rudder almost seems like it stalls the plane. Saito 100 W / CG @ 5.5 - 15 X 6 prop. Thanks to radio trouble I have two on the bench right now and thought that I might try chopping the rudder on one of them. Thank You for your time. Joe

Steve, I have a question regarding the ease of KE. My UCD dives terribly on KE. How are your ailerons set? Mine are neutral as is all other control surfaces. i don't think that each ARF builds so differently that one will and one won't (KE) Thanks for your time.

It depends where your cg is. The more aft, the more rudder coupling. The fuel tank position matters too - the "effective cg" during flight with the fuel tank behind the firewall is less than if the tank is at cg. My tank is at cg and my cg (with empty fuel tank) is at 5 1/2". I guess that you have to experiment with the cg position and see what you like best....

Thanks Rajul, I'm not afraid of expermenting but always want to check with the ones that have been there and dealt with it already. !00 Saito-15x6 prop. Tank at firewall W/CG at 5 3/4" I just felt that compared to other models the inputs required were a bit extreme to KE. I do realize the comparison is apples to oranges (against other models). What piqued my interest was reading some reports that hardly any coupling was experienced in KE on other UCD's yet, there is another of cutting the rudder down due to this. This plane is neutral, inverted requires a whisper of down elv. it tracks straight. It dosn't seem like I could ask for more. Thanks for the response. Joe

Cum'n thru,
Its not clear on how you get your UCD to !QUOT!dive to the deck!QUOT! during knife edge flight. Do you use enough rudder deflection and speed to maintain knife edge flight? The UCD will go into a knife edge loop with lots of rudder. Do you use your ailerons to keep the wings vertical and elevator to keep the plane going straight?

I have two UCD 60's and a UCD 46. The UCD 60's do have severe coupling that varies with the amount of rudder deflection and speed. You either have to fly it out with your ailerons and elevator or mix it out with your computer radio.

This "coupling" is characteristic of models that have no dihedral (flat wings) or too little dihedral. It seems that no one is addressing this and are concentrating on the rudder. In the past I've redesigned fins and rudders on other flat wing models but there was no significant change in flight characteristics. Pattern fliers used to get rid of this problem by sawing their foam wings in half on a band saw then re-gluing the wings together at a different dihedral angle. The correct dihedral will also help correct the tendency of the model to pitch to its top or bottom while in knife edge flight.

Since we're not going to modify the wings on our UCD's we'll just have to live with coupling and enjoy the other great flight characteristics of this airplane.

I have my tank on the CG and ballanced at 6 1/4. it's real touchy to fly, but the flat spins, torquerolling, hovering, and waterfalls, oh and blenders are great. I'm thinking of moving the Cg foreword, anybody else doing these stunts at say 5 3/4 to 5 1/2?

Rocketman. I can compensate with ail. & elv. but just thought the huge inputs were a little abnormal especially after reading some posts about little or no corrections. I've got #3 in the shakedown stages but weather is not optimal lately. Its snowing today! #4 is still on the bench and at this point in time I wanted to make any mods that might help. My radio gear is computerized but I still like to fly with the sticks. This will KE loop tighter than some planes inside or outside loops. I havn't tried KE at higher rpms to much. Rudder turns end up with the same results. The only other plane I've owned that had coupling problems was a Stinger .60 and I never figured that one out either. Thanks for your time in this. Good flying, Joe

Does anyone have the recipe for the UCD to do a respectable elevator? I don't like putting reflex on a switch. I'd rather have it linked to the elevator on a switch if that makes any sense. Haven't flown mine enough to do any thorough testing_bob

I don't know what you mean by reflex but, with a little throttle mngt. there not bad w/ my basic ability. One way to improve is to mix in some up ailerons with the elevator. Is that reflex?

Yes, that's reflex. I guess I'm looking for the magic amounts of elevator vs up ailerons...

3D rates on elevator and low rates on ailerons. Mix in on these settings about half travel of up ailerons. Best case scenerio is to start with a low mix and check the results. Gradually work up to performance/comfort level. Keep in mind all planes respond differently. Go slow and good luck. Joe

Roger that! I'll give it a try_bob

some fresh tr pics[:-]

Who makes the 13 x 4W prop?

Hi Adrian, I remember seeing a pic of your wing tips removed ? Did you put them back ?