paulsen

My Feedback: (2)

Hello, I have a new Saito 1.50 to put in my Ultimate ARF. My primary concern is prop size, I have a master air screw scimitar 16-8, and 4-stroke "K" 15-10 , and APC 15-12W. Any suggestions on break in prop and or flying prop.

I plan on doing away with the provided 16oz tank and mounting a 21oz on CG of the model. I am using a RAM 1300ma on board ignition, Cline fuel regulator (comes with one way pressure valve for (positive only) pressure), and all standard BB servos powered by a 6v 1400ma NMHD which Is another issue I would like advice on, I'm not sure if the standard servo would produce enough torque for the rudder and elevator. Any advice, tip's, or suggestions would be greatly appreciated.

Ike

cstevec

My Feedback: (1)

I have 2 of 'em. One is set up with a Saito 100 (& a ton of lead in the nose), & the other has a Webra 1.20 under the hood. Both have Futaba 3003 servos in them. They are plenty for the plane. The one with the 1.20 in it has been heavily modded with pull-pull on rudder, dual elevator servo's in the tail, and dual aileron servos, with pushrods driving the upper ailerons. 16oz. fuel tank in the stock location. I built a hatch behind the wing saddle and have the battery mounted under that hatch. Prop for that one is a Zinger 15/6-10.

The best prop for a Saito 1.50 on that plane should be either a 17X6 or 16X8, depending on whether you are looking for prop hanging or just good clean flying. I don't think I would even consider the 15X12 on the Ultimate. The 16 oz. tank is fine for that engine but I would leave it in the stock location and forget the regulator & on board ignition. If you add all that stuff to your plane (plus the extra fuel) you are going to wind up with a lead sled, tip stalling plane I think. Built reasonably light the Goldberg Ultimate is a *****cat to land & fly, built heavy it will bite you.

paulsen

My Feedback: (2)

The over all weight of the on board igniter and fuel regulator is 3.2oz so I'm not to concerned as long as the model stays under 10 lb's. I thought the APC 15x12W was out of the picture thank's for the head's up. I guess I will look for a 17x6 and just see which one she likes.

Where do you balance your CG and what is your all up weight? I am planing on 2-7/8" aft of LE for the snap roll's and knife edge loop quality's.


Ike

gunfighterII

forget the 15-12 it will be to much speed for this plane, stick with the 16-8 it will fly more like scale and give you more vertical preformance

Not24

My Feedback: (1)

I would rather see an AUW of under 9 lbs for this model. That's what mine weighed with an ASP 1.08, and was just about right. My buddy has one with the 150, and it's a tad heavier, and flew heavier. It needed much more speed on landing. He was running a 15-8 APC with a forward cg that made the plane track like none other I have ever flown. I was not into 3D when I flew these two, so I can't give much advice. The arf will be heavier than a lightly built kit, so your options are limited. The power will be there, but the wing loading may bite you.

Not24

My Feedback: (1)

I was thinking about building another one of these this winter and perhaps putting the 100 on it. I think it would be plenty of power if you could get the plane down to 8 lbs. My original one was a tittle tail heavy with the ASP 1.08, an had lead in the nose. My question is, do you think it's possible to get one to balance with the 100 and very little ballast? If not, I can stick my OS 1.08 on her and use that for balast.

bubbagates

My Feedback: (32)

Ike,

I had one of these and it was one of the best planes I ever had.

I think a 16X6 would be better on that engine. It will give you allo the pull you need and allow you to stilll land really slow. I had a YS110 in mine and with an APC 16X6 what a match, perfect combo. The Saito 150 is just about as powerful as the YS110. If you prop it much higher on pitch then you will have a hard time landing this thing as it loves to float about 6 inches from the ground.

Putting the tank on the CG is good for that plane. It will work out really well, there is definitely room to do it

Now for the servos.

I used Hitech HS-225MG mini's all around (ailerons,elevator,throttle) except for the rudder and on 6 volts they will be plenty of torque if you do what I did. With the Saito 150 you are going to need tail weight. Back on the tail, just in front of the stab there are cutouts under the covering for mini servos for the elevators. If you use a seperate servo for each elevator then balance will not be a problem and you will have better control then the carbon fiber rod they have you use. Then use pull pull on the rudder with a 100oz servo, The hitech 645 will work nicely here. That plane has a huge rudder and a standard servo, even on 6 volts will be stripped on the first knife edge pass you do or even if you have to compensate for a good crosswind. If you do decide to stay with a single servo for the elevators, then the 645 will work well here also. Remeber, you are going to have a pretty good load on the servos. Standards will be fine on 6 volts for the ailerons

Once I had this completed mine flew extremely well, was very predictable, would do the willdest inverted flat spin you have ever seen, would tumble like crazy. Basically any maneuver you would do that required rotation around the CG would end up really fast and really tight on high rate.

BUT, turn the throws down and it was a puddy tat to fly.

easton24

My Feedback: (1)

Hey bubba gates the ys 110 is not near as powerful as a saito 150. On the Central hobbies website it states it will only turn about 500-700 more rpm than a 91 . A 16-6 is too small a prop for the 150. The smallest listed for the 150 is a 16-8. A 17-6 apc works well on the saito 150.

tukkus

My Feedback: (2)

I'll spare you the grief of letting the YS boys know you speak of this blasphemy, for they shall get mid-evil on ur tukkus if they find out

bubbagates

My Feedback: (32)

That's strange, 2 of the exact same planes (Funtana 90) one with a Satio 150, the other with a YS110, The YS110 is mine and both using 30% Cool power. Saito with a 17X6 and my YS110 with a 17X4W and would easily out pull the Saito and with the Saito turning more RPM's .

One cannot argue with the specs and I will not attempt to do that. BUT, I know what my eyes see. I fly formation with this other pilot allot so we are usually pretty much in sync when we fly.

But, if that really is the case, the 150 may be a tad too much for the CG Ultimate so care will need to be taken

easton24

My Feedback: (1)

lol Sorry did not mean to upset anyone, especialy the ys devoted. I know how much they love those supercharged engines.

bubbagates

My Feedback: (32)

NAh, not upset at all.

I have a few Saitos both 100's in a H9 P51 Miss America and a H9 P-40, a couple of YS's, a 110 in a Funtana90 (came out of my CG Ultimate) and a 140 in a CG Sukhoi, 2 OS160FX's, one in a Gene Soucy Extra and one in an Extreme Aircraft Cap232, a couple of RCIgnition G26 Zenoahs, one in another CG Sukhoi and the other in a GP Super Stearman and a DA-50 in a Wildhare Ultimate so I'm not married to any one brand of engine. I just go with what I feel is best for a given application.

It's all good either way

CJKling

My Feedback: (1)

So overall, the Saito 1.20 will be a pretty decent fit in this plane? I'm building the kit and will be trying to keep it nice and light. Was considering the 1.20 or the 1.50, pretty good advice in this thread guys, thanks.

cstevec

My Feedback: (1)

Not24, Yes, if you are building the kit version it can be built to balance with a 1.00 & NO LEAD in the nose. The one I have with a Saito 1.00 in it was purchased off of RC Universe ready to fly with the lead already in it. It has about 6 oz. of lead in it but it flies a little nose heavy and With just an evenings worth of work I bet I could balance it with no lead at all. The rudder is intended for pull pull as designed & iff you were to put a pull-pull setup on the elevators, use the wire (not aluminum) landing gear, mount the battery & reciever under the tank (tank in stock location) aluminum spinner for the front & you should balance. If you are building/assembling the ARF, I can't help you there.

CJKling

My Feedback: (1)

Two elevator servos or one? Any guys had problems with just mounting one?

cstevec

My Feedback: (1)

I have one elevator servo in one of 'em & 2 elevator servo's in the other. Both fly well. If you use only one I suggest a minimum of 60 oz. torque.

LSP972

My Feedback: (13)

Aside from making sure the split pushrod doesn't introduce differential in one or both of the elevator halves, no issues at all. Both of mine, one built from the kit and one ARF, have one servo and do just fine.

Not24

My Feedback: (1)

Mine had one standard servo for the elevator, built like the plans. It would be better to use nyrods for the elevator. A good way is to make a splitter block with three threaded holes in it for the 2-56 studs. There's plenty of length back there to align the rods to remove any differential throws. I used a piece of delrin for this piece. It's best to do all this plumbing before the turtle deck goes on.

tukkus

My Feedback: (2)

can the Goldberg Ultimate hover?....a guy in my club has one for sale with a satio 1.20 in it and i'm thinking about getting it...i was also wondering if it will harrier?

CJKling

My Feedback: (1)

Plenty of torque in my servo, thanks for all the info. Saito 1.20 or 1.50?

cstevec

My Feedback: (1)

The one I have with a Saito 1.00 in it will hover just fine so I guess either of those engines will do just fine. The Webra 1.20 is Godawful power in that plane. And yes tukkus, the plane will harrier too but it will keep you on your toes.

cstevec

My Feedback: (1)

Here's a pic to wett your appetite

prop wash

Bubba,I have had a CG ultimate for about 5 years with a Saito 180 in it.No glow driver on board or pump.She runs like a top and starts with one or two flips with a chicken stick.Balance is a little nose heavy.She flies great lands the same.This is my favorite plane.I'm a purist so I never use an electric starter.I don't understand why you all have to move all your equipment around to balance.If you are going to buy a Saito 150 why not go with the 180,same size except the head is a little longer.I use a Master Airscrew 16/8.Tom

bubbagates

My Feedback: (32)

I did not move things around to balance mine, I wanted to have dual elevator servos with no slop at all in the linkages. Again, just my preference

here was the one I had

CJKling

My Feedback: (1)

Thanks guys, probably will be going with the 1.50. Nice pictures btw.