RE: U Can Do 3D
 

Rogue, did you try mixing in some up aileron with the elevator? Problem is its very difficult to stall this wing. Crayzc-rcu taped a thin dowel to the top of each wing, about 2" back from the leading edge, to ensure stall and it harriers great. Good luck, Joe

Beaulac, a flying buddy has a sign business and he made it for me. Joe

RE: U Can Do 3D
 

I think this is amazing how you can start a thread, I don't know how many years ago, and then have 80 pages worth of posts, this on will be the 2377th post when I get done.......I think i said before, but it is so interesting to go back to like the first post and see what people were talking about even before the UCD came out.....what engine they were going to put in it, the servos, and stuff like that....

RE: U Can Do 3D
 

You can spend some time reading this one. Its interesting to see the contributors come and go. I wonder how many of the first flyers still have their UCDs. I got mine when they first came out and am still the only UCD in our club. Joe

RE: U Can Do 3D
 

I still have mine. I will say sense I bought the EF Edge 540 It has been getting dust on it. I am now building the Funtana 90. I think the Saito 100 I am installing will not have enough power for what kind of flying I like. After getting the wings Done. What a nice ARF Hangar 9 my hats off and only $209. I sold one of my 40 size to pay for it. Not a bad trade. SL

RE: U Can Do 3D
 

Joe if I remember correctly somewhere in this thread you quoted your RPM numbers from your Saito 100 and from what I can remember they were way off of what mine were and what other Saito 100 users were. Are you basing this 75% number on your below average Saito numbers? Because if that the case I think 75% could be resonable. But with a properly sunning Saito 100 I don't believe that number would be nearly that high.

You stated that the YS 110 had 8% more power than the YS 91. Well it was widely known that the YS 91 and the Saito 100 were pretty close in power. Maybe a slight edge to the 91, but not much maybe a couple of percent (especially on the same fuel). So logic would state that the YS 110 would have close to 8% more power than the Saito 100. In all honest I do believe it is more than 8% and I'll even go on record as saying the YS 110 quite handily beats a Saito 120 in power. But 75%? I just don't believe it.

I'm not bashing YS at all. I feel they are the best 4-strokes made. I just feel your experience with your Saito is not representative of what most people have run into.

RE: U Can Do 3D
 

Coo, as far as performance goes on the Saito 100, its two years old. If something regresses over a two year period, it is hard to notice. I do remember being very happy with it in the beginning and over the two years of use it has been very reliable. That was on my 7 1/2 lb. UCD. My latest came out to 8+lbs. All I have to compare right now is the old Saito, swinging a 15" prop which needed 3/4 to full throttle to hang, with only the ability to fly out of a hover. The new YS swings a 16" prop and will hover at 1/4 throttle and climb to the clouds. This 8+lb. UCD is now an additional 6 oz. heavier with the YS. Weight, throttle settings and prop size is how I came up with an estimated 75% more power. Not a very technical aproach, I must admit, but seems realistic to me. BTW, the Saito was rebuilt twice, including bearings and cam gear and both times recieved approval from the techs, who had the green light to replace anything that was needed. As far as the YS 91 goes with 8% less power than the 110, I cannot verify that and it is the reason why I said 'do not quote me on that, I could be wrong'. Perhaps I was using the figures from the comparison of the Saito .72 to the .82 Thanks for pointing that out, so as no one else gets misled. Joe

RE: U Can Do 3D
 

I'll take it...........Seriously......good to have another plane when You're 15 and have to wait to save up...if ya don't want it.......send it to me......e-mail and s/n at the bottom....:D

RE: U Can Do 3D
 

I too, still have my UCD. Saito 1.00. I flew it last season. Loved it, as it was my first 3-D plane. But, I started this season with the EF 540 and a Saito .72. What a differance! I have not even taken my UCD out of the moth balls. I have been thinking about bringing it back out just to see if I can do more with it then I did before.

Richard

RE: U Can Do 3D
 

Hi, I have a question...
what is the best prop for 3d to the u can do 3d 60??? (i have the saito 100)

RE: U Can Do 3D
 

I ran a 16/4 APC. Quick spool up, a bit more wash over the tail with the larger diameter and really slowed down on the down lines. Joe

RE: U Can Do 3D
 

16*4w????

RE: U Can Do 3D
 

EVEN, yes, 16/4W APC. I forgot to mention before that the 15/4W APC worked very well.

COO, curiosity got the best of me so I did a controlled bench reading this morning as opposed to a field reading. This is what I got: 15/4 APC 1010 RPM, 15/6 Top Flite wood 8700 RPM, 16/4 APC 9000 RPM. I'm curious to see what others are getting, as that would be indicative to the state my Saito is in. Joe

RE: U Can Do 3D
 

o.k thanks, I will buy 15\4w APC

RE: U Can Do 3D
 

Yesterday we took our first flight in the .60 version. The plane took off and only needed a little of down trim but other than that it was flying perfectly! We were so satisfied that my dad went into a 3d move (on the first flight!) and it stayed. My dad came for a touch and go and it was perfect, so he left it up to me and i flew for about 10 minutes and i brought it in with no problem. our engine is an OS.91S2. and to surprise it cranked right up when we broke it in. We went home took it apart and checked for any leaks or to see if the enigine had moved or something, but nothing was wrong. today were going back out to try some more.

Kendon Townsel
14, Atlanta,GA

RE: U Can Do 3D
 

Joe thanks for the numbers. I have a 16x4W sitting here, but I've actually never used it. Your numbers are peak RPM's correct? For reference I perfer the APC 15x6 prop with my Saito 100. I get 9900 rpms with the APC. I've also used Zinger 15x6 wood props and I can turn 9600 with those. They are consistantly about 300 rpm lower than the apc. They only weigh half as much but they are not as efficient. I wish I could find APC props that weigh the same as wood :) Never tried the 15x4W but have considered trying it just to see how different it makes the UCD fly.

I've always heard that the 16x4w was a little much for the 100 and that it was a slow spooler. I will have to try mine soon and find out what kind of rpm I turn with it.

RE: U Can Do 3D
 

Coo, yes, peak numbers. It is wood to APC, but I see that you are getting considerably more RPMs when comparing the 15/6 size. Witholding 300 RPM for the difference between wood and APC, you are still getting 800 RPM more than me. Will altitude effect my readings? I'm at 1000 feet ASL. Perhaps my trusty old Saito has too many hours on it. Joe

RE: U Can Do 3D
 

Joe I'm at about ~2100'. Like I said, I can't really referance the other props, but I've used the 15X6 in wood and in APC. Your numbers seem low.

RE: U Can Do 3D
 

this question is for Saito 100 users: did you have to put in any down thrust? Mine likes to lean back in a hover.


matt

RE: U Can Do 3D
 

Check the celarance in for your valves. Mine were just 1/8 of a turn off and it effected my engine performance greatly. I picked up nearly 1000 RPM or more by getting them correctly set. It made my engine come alive again.




Neo

RE: U Can Do 3D
 

I dont understand, what is the best prop for saito 100 for 3d for this planes in your opnion
1. 15/4w(APC)
2. 16/4 (zinger)
3. 16/4w(APC)

RE: U Can Do 3D
 

I love the performance of the 15x6 on my Saito 100. Personally I like the APC props myself. They provide better performance. Really it's just what you like. All the props listed above are good for 3d. They will all feel a bit different in the air.




Neo

RE: U Can Do 3D
 

I use a 15x4W APC. Great performance in my opinion

RE: U Can Do 3D
 

Finally broke down and bought a scale. Ready for this? 8lb 8.6 oz with a YS 110 and a 16/6 APC. Holy crap!!! The YS put another 6oz. on it over the Saito. With the Saito it was 8lb. 2.6 oz. Out of all the props for the Saito 100, I liked the 15/4 APC.

Gatorboy, good to hear another success story. You will not tire of this plane. Good luck and enjoy your UCD.

Neo, the valve rocker clearance is dead on, always part of my general maintenance. Joe

RE: U Can Do 3D
 

Dear Coo,
Your bent con rod is probably due to electrically starting the engine, while it had some fuel flooding the cylinder causing an hydraulic lock - very common with up-side-down engines. Always try to flip the engine manually before applying an electrical starter to it. If it goes to hard, remove the glow plug and drain the cylinder.

Good luck with the rebuilt engine

Yaron

RE: U Can Do 3D
 

After fueling I would just rotate the prop a few times, by hand, with the throttle open. That was always enough to clear the cylinder before starting. Joe