Welcome to Club SAITO !
09-20-2009, 07:32 AM
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RE: Welcome to Club SAITO !
Mike I had this happen to abrand new unrun Enya 1.55, the rocker split open where the adjusting screw goes through it. I ordered a new set of rockers and got rockers for the .53 on the first try, MRC let me keep the wrong ones and sent the correct ones for the same price.
09-20-2009, 08:21 AM
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RE: Welcome to Club SAITO !
So the general consensus (although not answered directly) is that having the pressure tap is much better than running a straight pipe without a tap.
I was pretty sure that was the case anyway. And I've got the muffler with pressure fitting on it now anyway.
Jim
I was pretty sure that was the case anyway. And I've got the muffler with pressure fitting on it now anyway.
Jim
09-20-2009, 09:49 AM
RE: Welcome to Club SAITO !
ORIGINAL: Hobbsy
Jim a guy ask me to run a Graupner 12.5x7 3 blade on my Saito 1.15, it is a hard turning prop that my Fox .74 Diesel can only swing at 8,400. To my surprise the 1.15 turned it at 9,650 with a fantastic idle at 2,000.
Saito 1.15
Plug==Fox Miracle
Fuel WildCat 15% with 18% 80/20 blend
Stock exhaust==9,650
TurboHeader===9,740
Nothing like a well balanced 3 blade for a smooth idle.
The Graupner 12.5x7 has blades approximately 1/8th inch wider than similar sized two bladers.
Jim a guy ask me to run a Graupner 12.5x7 3 blade on my Saito 1.15, it is a hard turning prop that my Fox .74 Diesel can only swing at 8,400. To my surprise the 1.15 turned it at 9,650 with a fantastic idle at 2,000.
Saito 1.15
Plug==Fox Miracle
Fuel WildCat 15% with 18% 80/20 blend
Stock exhaust==9,650
TurboHeader===9,740
Nothing like a well balanced 3 blade for a smooth idle.
The Graupner 12.5x7 has blades approximately 1/8th inch wider than similar sized two bladers.
09-20-2009, 11:25 AM
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RE: Welcome to Club SAITO !
Jim......
I think you are referring to my post about the Saito 3.00 that has/had a crankcase pressure system. It has a tap on the crankcase which then went to a dedicated needle
valve and then, according to Randy at Saito engines (I think I am quoting him correctly....if not I apologize) it joined the tap from the exhaust pipe (no muffler on these) and then continued to the fuel tank to provide a head of pressure to the fuel flow. Thus........you had basically 5, yes I said FIVE, friggin needle valves all interacting with each other
to produce the resultant mixtures for low and high settings!! That about 3 needle valves too many for me. In my case, for unknown reasons, my extended exhaust flex-pipes did not have any pressure tap, so I was running the crankcase pressure directly to the fuel tank, according to my best interpretation of the sparse instructions/diagrams.
Let me tell you the eng hated this arrangement. In fact, Randy says the fact that the crankcase press was first routed to the exhaust pipe pressure line allowed the pressure
from the crankcase to be mediated, if necessary, so that it didn't provide excess pressure to the tank. I think you can see by now that I was trying to push a 20 ft length of chain from the back end!! ljc
I think you are referring to my post about the Saito 3.00 that has/had a crankcase pressure system. It has a tap on the crankcase which then went to a dedicated needle
valve and then, according to Randy at Saito engines (I think I am quoting him correctly....if not I apologize) it joined the tap from the exhaust pipe (no muffler on these) and then continued to the fuel tank to provide a head of pressure to the fuel flow. Thus........you had basically 5, yes I said FIVE, friggin needle valves all interacting with each other
to produce the resultant mixtures for low and high settings!! That about 3 needle valves too many for me. In my case, for unknown reasons, my extended exhaust flex-pipes did not have any pressure tap, so I was running the crankcase pressure directly to the fuel tank, according to my best interpretation of the sparse instructions/diagrams.
Let me tell you the eng hated this arrangement. In fact, Randy says the fact that the crankcase press was first routed to the exhaust pipe pressure line allowed the pressure
from the crankcase to be mediated, if necessary, so that it didn't provide excess pressure to the tank. I think you can see by now that I was trying to push a 20 ft length of chain from the back end!! ljc
09-20-2009, 01:55 PM
RE: Welcome to Club SAITO !
ORIGINAL: mike early
Can anyone confirm that the exhaust thread on the 90 3-Cylinder Radial: TT is 9mm x .75mm? That is the same thread size on the .30 and .40 Saitos.....
Can anyone confirm that the exhaust thread on the 90 3-Cylinder Radial: TT is 9mm x .75mm? That is the same thread size on the .30 and .40 Saitos.....
09-20-2009, 01:59 PM
RE: Welcome to Club SAITO !
ORIGINAL: TexasSkyPilot
So the general consensus (although not answered directly) is that having the pressure tap is much better than running a straight pipe without a tap.
I was pretty sure that was the case anyway. And I've got the muffler with pressure fitting on it now anyway.
Jim
So the general consensus (although not answered directly) is that having the pressure tap is much better than running a straight pipe without a tap.
I was pretty sure that was the case anyway. And I've got the muffler with pressure fitting on it now anyway.
Jim
It has been problematic at best for Sito owners. There are just too many variables. I might work for a model where the throttle is left in one position?
My advice is to not get involved with one unless you are using a Cline regulator also.
Most Saitos will run fine with no pressure system as long as you are not doing aerobatics
09-20-2009, 02:07 PM
RE: Welcome to Club SAITO !
ORIGINAL: mike109
My Saito 90 TS disgraced its self today. It has been sitting since April so I checked the plane over, checked that the engine would turn freely and that the valve clearances were close to right which they were and went flying.
She started with no problems and I gave the needle a tweak and off we went. About 30 seconds into the flight the engine suddenly cut and I landed (if that is the word for it) in a field of oats which took the ouch out of the landing but stopped the plane very smartly.
Nothing appeared damaged so I prepared to start the engine again when I noticed that it did not feel quite right. So it was put into the vehicle and onto the bench for a look see.
I decided to check to see whether the valves were opening correctly and there was the problem. One of the valve adjusting screws (exhaust) on the left cylinder was broken and the nut and half of it were wandering round inside the tappet cover. The other half had started to unscrew and had reached the point where the valve was not opening.
I have a very early FA-45 so I pulled an adjusting screw out of it and it fits perfectly in the FA-90TS so she is ready to go again. I will buy some spares as soon as I can.
I have heard of pushrods jumping out of the end of the adjusting screws but this one was cleanly fractured.
Anyone else ever had this happen?
Mike in Oz.
My Saito 90 TS disgraced its self today. It has been sitting since April so I checked the plane over, checked that the engine would turn freely and that the valve clearances were close to right which they were and went flying.
She started with no problems and I gave the needle a tweak and off we went. About 30 seconds into the flight the engine suddenly cut and I landed (if that is the word for it) in a field of oats which took the ouch out of the landing but stopped the plane very smartly.
Nothing appeared damaged so I prepared to start the engine again when I noticed that it did not feel quite right. So it was put into the vehicle and onto the bench for a look see.
I decided to check to see whether the valves were opening correctly and there was the problem. One of the valve adjusting screws (exhaust) on the left cylinder was broken and the nut and half of it were wandering round inside the tappet cover. The other half had started to unscrew and had reached the point where the valve was not opening.
I have a very early FA-45 so I pulled an adjusting screw out of it and it fits perfectly in the FA-90TS so she is ready to go again. I will buy some spares as soon as I can.
I have heard of pushrods jumping out of the end of the adjusting screws but this one was cleanly fractured.
Anyone else ever had this happen?
Mike in Oz.
09-20-2009, 03:19 PM
Senior Member
RE: Welcome to Club SAITO !
ORIGINAL: w8ye
The 90R3 has three Saito 30 cylinders and the exhaust is the same size as a Saito 30
ORIGINAL: mike early
Can anyone confirm that the exhaust thread on the 90 3-Cylinder Radial: TT is 9mm x .75mm? That is the same thread size on the .30 and .40 Saitos.....
Can anyone confirm that the exhaust thread on the 90 3-Cylinder Radial: TT is 9mm x .75mm? That is the same thread size on the .30 and .40 Saitos.....
Thanks!
I will try a header pipe with a pressure tap. They are out of stock on the .40 exhaust header.... I wonder how it'll sound? Hopefully 1/3rd as cool as the 903R....
09-20-2009, 05:29 PM
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RE: Welcome to Club SAITO !
G'day W8YE. Seems that it is not all that uncommon as Dave has had the problem too with an Enya. All I can figure is that the person that assembled the engine got a bit carried away with locking the nut or else the material in the adjuster had a flaw in it. Mike
09-20-2009, 08:05 PM
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RE: Welcome to Club SAITO !
I have three Saito's, I am curently useing my 1.20 in gp vENNIUS II. love it ,all the power I neen for verticals or anything else.
Gene
AMA 35661
Gene
AMA 35661
09-21-2009, 12:07 PM
RE: Welcome to Club SAITO !
ORIGINAL: pattern flyer63
I have three Saito's, I am curently useing my 1.20 in gp vENNIUS II. love it ,all the power I neen for verticals or anything else.
Gene
AMA 35661
I have three Saito's, I am curently useing my 1.20 in gp vENNIUS II. love it ,all the power I neen for verticals or anything else.
Gene
AMA 35661
09-21-2009, 12:21 PM
RE: Welcome to Club SAITO !
Hi, are your Triumphs two or four wheel? I have a '66 TR4A waiting restoration. Bid on a Bonneville a friend has a while back, but he would not sell.
Cheers,
Richard
Cheers,
Richard
09-21-2009, 07:18 PM
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09-22-2009, 03:18 PM
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RE: Welcome to Club SAITO !
I purchased a gasket set for the FA80.
what i need to know, is ....
is there a gasket that goes between the block and the jug?
cuz it sure didnt come with one.
have to replace the pushrod tube rubbers....their split and hard.
what i need to know, is ....
is there a gasket that goes between the block and the jug?
cuz it sure didnt come with one.
have to replace the pushrod tube rubbers....their split and hard.
09-22-2009, 09:40 PM
RE: Welcome to Club SAITO !
ORIGINAL: TexasSkyPilot
So the general consensus (although not answered directly) is that having the pressure tap is much better than running a straight pipe without a tap.
I was pretty sure that was the case anyway. And I've got the muffler with pressure fitting on it now anyway.
Jim
So the general consensus (although not answered directly) is that having the pressure tap is much better than running a straight pipe without a tap.
I was pretty sure that was the case anyway. And I've got the muffler with pressure fitting on it now anyway.
Jim
09-22-2009, 09:45 PM
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RE: Welcome to Club SAITO !
Having learned the hard way using the crankcase pressure system (I am told a limited number of engines were sent out with this recommendation) and no muffler or exhaust
pipe tap, I would very much agree.
pipe tap, I would very much agree.
09-23-2009, 03:54 AM
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RE: Welcome to Club SAITO !
G'day Fellas, how do ya's reckon my Saito 1.00 would go hauling a 76" Tiger Moth around with a 15 x 6 ? The aircraft currently has a 1.80 with a 16 x 8 and well , it is a bit overpowered, and I want to stick the 1.80 in my WM 1/4 Clipped Wing Cub!. All it's gotta do is fly like a real 'Moth not go crazy. I reckon she's up to the task as the big bipe don't need a lot get her going but I thought I'd get some other opions. Thanks spud
09-23-2009, 04:22 AM
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RE: Welcome to Club SAITO !
Your Saito 1.00 will be a good match for the Tigermoth. I fly one using a well broken in Magnum .91 and a 14x8 and it's got plenty of power.