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RE: Welcome to Club SAITO ! - 9/17/2011 3:19 AM   
Clancy Arnold



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Status: offline 		I have a technical question on a Saito 150.
A friend bought a Saito 150 with a known bad cam.  He ordered the new cam and asked me to reassemble the engine.  It was disassembled when he bought it.  There are two steel spacers on the Cam Gear Shaft. One is thin and one is thick.  Which one goes in front and which goes to the rear?

Clancy


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RE: Welcome to Club SAITO ! - 9/17/2011 4:50 AM   
w8ye



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Status: online 		It is not too important. Some have two thin ones and I've seen them with no shims and also two thick ones.

I was going to say for you to try to center the cam lobes underneath the cam followers? The crankshaft gear has enough space for the cam gear to be anywhere within reason as long as it is in the front of the box.




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RE: Welcome to Club SAITO ! - 9/17/2011 5:00 AM   
hsukaria


 

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Status: offline 		Today has been a good learning day by reading this forum. Super helpful, thanks guys.

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RE: Welcome to Club SAITO ! - 9/17/2011 1:08 PM   
Hobbsy



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Status: offline 		The Cline system will make a considerable amount of pressure even with a straight pipe as the check valve traps the "peaks" of the exhaust pressure waves. Even the little Saito .30 will put a bulge in one of those stiff walled Sullivan tanks.

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RE: Welcome to Club SAITO ! - 9/17/2011 2:12 PM   
Clancy Arnold



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I put the thick one in back and the thin one in front to center the gear in the space in the casting.

How do you like my Avatar?  I am 5 Ft 8 In, the Taube is 7 Ft 4 In  WS, I fly it in Control Line Sport Scale.
Clancy


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RE: Welcome to Club SAITO ! - 9/17/2011 4:31 PM   
rcdude7


 

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I just bought a new/old saito fa-150, it has the choke plate, old style NV assy w/blunt needle, fire nozzle type muffler and short crankshaft.

This engine has a "B" stamped on the engine mounting lug. Would this be the 14:1 compression ratio engine? How can I tell without tearing it down? Should I replace the NV assy with the new style assy?

I know a little about saitos, but I'm no expert.

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RE: Welcome to Club SAITO ! - 9/17/2011 4:55 PM   
w8ye



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Status: online 		I would just use it.

The high compression ones do fine as long as you don't let the mixture get lean.


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RE: Welcome to Club SAITO ! - 9/17/2011 11:59 PM   
flyingagin



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How hard does that bird pull? About 20 years ago I built a os .61 rear exhaust piped cl. It about pulled my arm off when it came onto the pipe.
Like the avatar


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RE: Welcome to Club SAITO ! - 9/18/2011 12:43 AM   
Clancy Arnold



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It is easy to fly because it is equipped with one of my U/Tronics Control 4 channel systems.  Channel 1 is Throttle, channel 2 is Wing Warp, channel 3 is Rudders and channel 4 is unused.  The Elevator, Wing Warp and Rudder are all controlled by scale cables.  I adjust the Rudders for line tension and the Wing Warp to level the wings.There are 92 Scale Cables on the model.  At 1/3 Throttle is is doing 7.5 second laps on 65 Ft lines for 37 MPH.  The Jeannin Stahltaube is powered by an OS FS91 and weighs 10 Lb 2 Oz.

I have attached the access to my build log.  Reply # 25 includes a 30 second clip of it's first flight.  The Taube did not crash, the photographer fell down. LOL
Clancy


http://www.rcgroups.com/forums/showthread.php?t=1319950

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RE: Welcome to Club SAITO ! - 9/18/2011 1:30 AM   
flyingagin



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Status: offline 		Thanks Clancy Arnold
Since pull is a function of model wight, line length and the square of the speed, 37 mph is going to make an incredible difference. I don't remember my speed but I bet it was like 110 - 130 so it pulled real hard. I flew it two handed. No throttle.


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RE: Welcome to Club SAITO ! - 9/18/2011 1:40 AM   
Clancy Arnold



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Status: offline 		I have a friend Joey Mathison that flies CL Speed.  He holds the model with one hand while doing over 200 MPH.  You want to see Mass in Motion!  Joey weighs about 320 Lbs and the model Class B, D or Jet are doing 1.4 second laps.  I asked Joey several years ago how he gets in shape to hold the Speed Models and he said he does one arm curls at 95 LBS.
Clancy



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RE: Welcome to Club SAITO ! - 9/18/2011 2:01 AM   
Old Fart


 

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Status: offline 		Hey welcome clancy,when i read your first post and saw the size of the model and it being control line well,i thought you must be pretty brave thanks for the interesting explanation.

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RE: Welcome to Club SAITO ! - 9/18/2011 2:09 AM   
Old Fart


 

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quote:

ORIGINAL: Hobbsy

The Cline system will make a considerable amount of pressure even with a straight pipe as the check valve traps the ''peaks'' of the exhaust pressure waves. Even the little Saito .30 will put a bulge in one of those stiff walled Sullivan tanks.

Hi dave do you think this subject needs a bit of clarification for the not so expert members of the forum such as me "this veeger requires the information"

There seems to be much confusion here and elsewhere,your comments on the little 30 bulging a sullivan tank lead me to believe that you ran a pressure line back to the fuel tank which i did'nt think was necessary if you use the cline.If i've just got that back to front it still makes a point..this subject could do with an airing do you think? perhaps a couple of diagrams too as there are people who don't like to run pressure lines back into good fuel.

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RE: Welcome to Club SAITO ! - 9/18/2011 2:34 AM   
rcdude7


 

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The cline reg works much like a YS fuel system, however on a fourcycle it uses muffler pressure instead of crankcase press. Yes, it does send exhaust gasses to the fuel tank.

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RE: Welcome to Club SAITO ! - 9/18/2011 2:51 AM   
Clancy Arnold



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Status: offline 		Basically you have 4 choices to get fuel to the engine:
a.  Venturi Vacuum
b.  Exhaust pressure
c.  Crank case pressure
d.  Pump

Clancy

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RE: Welcome to Club SAITO ! - 9/18/2011 12:37 PM   
Hobbsy



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Status: offline 		http://www.billsroom.com/pcfs/fuelsystemdesc.html

The Cline regulator is the equivalent of the regulator side of a Walbro carburetor, the thing I like most is that your engine will run the same from full tank to empty and it doesn't matter where you put the tank. The check valve goes in the pressure line right at the pressure tap on the muffler.

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RE: Welcome to Club SAITO ! - 9/18/2011 5:32 PM   
NM2K


 

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Status: online 		How does one go about buying new Cline Regulators these days, Hobbsy? TIA


Ed Cregger


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RE: Welcome to Club SAITO ! - 9/18/2011 6:38 PM   
KenD



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Status: offline 		Ed look at the previous post!



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RE: Welcome to Club SAITO ! - 9/18/2011 9:36 PM   
Nikolas K


 

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Status: offline 		So, Cline regulator is in reality a fuel injection system...???

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RE: Welcome to Club SAITO ! - 9/18/2011 10:31 PM   
NM2K


 

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quote:

ORIGINAL: KenD

Ed look at the previous post!





.

< Message edited by NM2K -- 9/19/2011 3:28 PM >


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RE: Welcome to Club SAITO ! - 9/18/2011 10:32 PM   
w8ye



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It is just a demand regulator.

It keeps fuel available to the carb at a constant pressure.

This fuel is supplied (on demand) by the vacuum signal supplied to it by the carb venturi.

On the tank side of the Cline regulator, fuel is presented under pressure typically by running bleed pressure from the engine through a check valve.


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RE: Welcome to Club SAITO ! - 9/18/2011 11:19 PM   
triumphman49


 

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Status: offline 		Hi all,

Believe I read where someone was using a perry pump and cline regulator with a Saito gas conversion and stock carburetor. Does anyone know if the Cline or IronBay regulators are compatible with gas?

Thanx much
T-man49
Club Saito #723

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RE: Welcome to Club SAITO ! - 9/18/2011 11:41 PM   
w8ye



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Status: online 		I don't know about the Iron Bay but the diaphragm in the Cline is a standard Walbro D10-WAT


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RE: Welcome to Club SAITO ! - 9/18/2011 11:49 PM   
triumphman49


 

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Status: offline 		Hey THANX ,

T-man49

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RE: Welcome to Club SAITO ! - 9/19/2011 10:26 AM   
Nikolas K


 

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quote:

ORIGINAL: w8ye

No!

It is just a demand regulator.

It keeps fuel available to the carb at a constant pressure.

This fuel is supplied (on demand) by the vacuum signal supplied to it by the carb venturi.

On the tank side of the Cline regulator, fuel is presented under pressure typically by running bleed pressure from the engine through a check valve.




So, the fuel metering is not provided immediately by suction, but by the regulator. Suction only helps to adjust the amount of fuel needed and the fuel is provided under positive pressure. Then, its principle is like the pressure carburetor invented by Bendix ( http://en.wikipedia.org/wiki/Pressure_carburetor) for the large piston aero engines. I copy a sentence from the article here:"The fact that a pressure carburetor operates on the principle of fuel under positive pressure makes it a form of fuel injection." In fact, even using only exhaust pressure to pressurise the tank, makes our model glow engines carbs act like pressure carburettors.


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