U-CAN- DO 3D engine
 

hi everyone.
i want to buy the GP UCD 3D and i need help in choosing the engine.(only 2 stroke engines)
what should i go in the ucd?
O.S 91FX
O.S 1.08 FSR (BX-1)
SUPER TIGRE 90
any recommends on the muffler?
what prop should i use? apc 15x4 or 16x4?

U-CAN- DO 3D engine
 

we got one we about to put a OS 91 heli motor in. hoping it works better there than it did in the heli. no it is not the new cspec.

U-CAN- DO 3D engine
 

i had a 108 on mine and id was way to much but it flew perfict

3d

U-CAN- DO 3D engine
 

HI TOOLY!!!

why not to buy saito 100 ???

maybe i get it in good price.

u can come to the field and to see my UCD with the saito 100.

U-CAN- DO 3D engine
 

My UCD has a ST 90. It has good power, but it also has throttling and reliability problems.......which gives you an uneasy feeling when flying near the ground.

The OS 108 is way too heavy for a UCD. It's still too nose heavy with the ST 90.

The OS 91FX has a mixed reputation in the UCD threads. Some liked it.......some cussed it.

I would suspect the OS 91 heli engine would be one of the best choices for a UCD due to the better carb, and the lack of a remote needle valve. But this is only a guess since no one around here has one yet.

I'd like to see how a Saito 100 performed in a UCD, but I'm not willing to spend $300 just to test it against my ST 90. :(

U-CAN- DO 3D engine
 

hi meeko.
i sent you a message in the FLYHI forum.

U-CAN- DO 3D engine
 

I have a 91 FX for sale. Includes tru-turn spinner a props. PM if interested!

U-CAN- DO 3D engine
 

well, i think i will buy the 91 fx but new.
i don't think that will want to sell it to me, i'm from israel.

U-CAN- DO 3D engine
 

91 FX all the way

U-CAN- DO 3D engine
 

what prop to use on fx91?
apc 15x4 or 16x4???
also, shat HITEC or futaba servos to use?
i want to put in my 6V pack.

U-CAN- DO 3D engine
 

I use a 14 x 6 APC on mine with a 91fx, and it pulls great. I tried a 15 x 4 W, but it was too much for the engine. It was very slow to spool up with that prop.

servo
 

what servo hitec i should use?
should i use micro on throttle?

U-CAN- DO 3D engine
 

Saw one today at the field and it had an RCS 1.40 gas......Awesome! Hovered at 1/4 throttle, 2 foot take offs, and still floats like a profile fun fly.

Re: servo
 

I used the new Hitec 5475 (digital) on my ailerons and elevator. I used a Hitec 5645 on the rudder.

As for the throttle I used a small hobbico CS12MG (similar to Hitec HS81MG). The metal gear isn't really needed but I had one laying around.

The servos perform very well and they center A LOT better then the 605s I had in the UCD before.

Hope this helps.............Mark

U-CAN- DO 3D engine
 

thanks for the info mark!
the hitec digital servo are too expensive to me.
i'm planning to use my home made 6V 1800MA nimh in it.
i thought to use these:

HS-81 - throttle
HS-525MG - ailerons
HS-605BB or HS-77BB - elevator
HS-645MG - rudder

should i use 4-40 rods ?

U-CAN- DO 3D engine
 

Yes.......definately use 4-40 rods and ends. Throw all the 2-56 stuff in your spare parts drawer. Also keep the slop as little as possible on the control surfaces to reduce the chance of flutter. I used ballinks on the servo arm on all my controls.

Also the new 5475 digital servos are "value priced digitals" they're only about $5 more than the HS525MGs and $8 more than the 605BB's.

Best of luck...............Mark

U-CAN- DO 3D engine
 

tooly- where do you fly

U-CAN- DO 3D engine
 

hi
my frienf who have the flip with saito 72 fly it in rishon.

U-CAN- DO 3D engine
 

yep we know the place. we used to fly at enshemmer and hod ha sharon but now will go to the new field at ha hogen,