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Old 09-25-2019, 06:59 AM
  #42451  
acdii
 
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I never had issues with the fuel tank position on the FG-11. I had it inverted, and the tank was above the carb. Never flooded, was easy to start and ran great. I now have it in an LT-40 and the tank is below the carb.
Old 09-25-2019, 07:17 AM
  #42452  
Jesse Open
 
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Originally Posted by Glowgeek
That makes sense. Perhaps the low crankcase pressure differential of 4 strokes is insufficient to drive the mechanicals of a fuel inlet needle/seat setup.
The Saito crankcase check valves can make fine pressure. By throttling the outlet check, the pulse can be made stronger.
Old 09-25-2019, 07:35 AM
  #42453  
harrythor
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Originally Posted by acdii
I never had issues with the fuel tank position on the FG-11. I had it inverted, and the tank was above the carb. Never flooded, was easy to start and ran great. I now have it in an LT-40 and the tank is below the carb.
I know with the valiant factory tank the carb level was almost at the bottom of the tank . in order to get the low tuned in properly you had to adjust the needle way past the factory recommendations to achieve a proper tune. Then in flight the tune would change when you went inverted with the plane. The engine would also flood in transport . I have a bad habit of not emptying the tank at the end of the day and doing it later in my garage . After lowering the tank i was able to achieve my low settings within the factory recommendations. The motor now holds tune when flying inverted regardless of my tank fuel level, and the motor does not flood in transport any more .
Old 09-25-2019, 12:06 PM
  #42454  
Hobbsy
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Originally Posted by acdii
I never had issues with the fuel tank position on the FG-11. I had it inverted, and the tank was above the carb. Never flooded, was easy to start and ran great. I now have it in an LT-40 and the tank is below the carb.

Same set up I referred to above, I just forgot to say LT 40, wonderful fliers.
Old 09-25-2019, 12:10 PM
  #42455  
Hobbsy
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Originally Posted by tashley
Looking for a blowed up or broke 72 to complete mine what's missing parts.
Carb, exhaust, rocker covers etc.
Anyone out there have one?
Thanks

The Saito engine code is RR for the plain engine and SS for the GK, here are some parts: https://www.horizonhobby.com/SearchD...ain=&pageView=


Macgregor/Hobby Plastic has 72 parts scattered over many pages: https://www.hobbyplastic.co.uk/index...5ktv8mhao8q8s5

Click, Return to Product List to see more.

Last edited by Hobbsy; 09-25-2019 at 12:21 PM.
Old 09-25-2019, 05:44 PM
  #42456  
the Wasp
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if this helps with the Regulator talk,
my manuals for my OS Heli regulators show that a one way valve is used on the engine's back plate to pressurize the fuel tank, but of course these are 2 St engines. so if some one says they are using a regulator on an engine without a pressurized fuel tank, or without a fuel pump and they can not get a rich enough setting, I can see where the problem just may be.

edited, I forgot, I have a fuel pump for my Saito 115

Jim

Last edited by the Wasp; 09-25-2019 at 05:47 PM.
Old 09-27-2019, 12:52 AM
  #42457  
Rudolph Hart
 
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I've never run a fuel pump on any of my saito's, although there may be some installations that would benefit from an accessory pump?? someone say so if you use them and they work well for you. My personal experience at a flying field is the guys running accessory fuel pumps like perry etc spend a lot of time on the ground,
Old 09-27-2019, 01:49 AM
  #42458  
Jesse Open
 
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Aside from the crankcase pressure system on the Saito 120 dual plug, pumped, never found a need for a pump or regulator since day one. This includes several inverted installations. The Saito 120 pump system worked fine but there was a bit of a learning curve. The trick was not trying to run with high pressure. It used a needle controlled vent valve to relive excess pressure.
After one season, that pump was removed after relocating the tank. Ran very well without the pump.

Aside from that lone venture, no pump or regulators, thank you

Parts that aren't there never fail or go out of adjustment.
Old 09-27-2019, 02:57 AM
  #42459  
Rudolph Hart
 
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Hey it's not all bad down under, it's the queens birthday long weekend and three whole days off woo hoo! riding the duke down south to a classic bike racing meet where they burn heaps of methanol and castrol R

Try telling that to jet pilots
Old 09-27-2019, 03:08 AM
  #42460  
Jesse Open
 
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Great on top too.


Have a nice day . Hopefully the steam boiler and water pump on the Duc hold up. Better take along a spare radiator hose too.

Or is yours the turbine powered Ducati?

Last edited by Jesse Open; 09-27-2019 at 05:03 AM.
Old 09-27-2019, 03:13 AM
  #42461  
Hobbsy
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One nice thing I like about a regulator is that you can run the engine very near the peak, the mixture will not change from full tank to empty tank. Economy is considerably better also.
Old 09-27-2019, 04:57 AM
  #42462  
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That is not usually a problem here. I seldom use or rely on the last 100 RPM for my particular flying style.
Back in the "All the horsepower, all the time" days, I usually employed YS engines in that case.

Every now and then, when the mood strikes, I still fire up a YS powered favorite. Not only great, steady top end, wonderful steady idle and unbeatable transition to boot.

It is indeed all for fun.
Old 09-27-2019, 06:43 AM
  #42463  
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If the FG-11 floods, it is possible the carb is damaged. It has a pump in it with check valves, and there may be some debris that is keeping one of them from fully closing, and that will cause it to leak and run poorly. I have never has gas leak out of it regardless of tank position. Might want to consider rebuilding with new gaskets. According to the manual, there is no limitation to where the tank is positioned in relation to the carb with the exception of distance, 200mm Center of tank to center of engine.
Old 09-27-2019, 10:59 AM
  #42464  
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Originally Posted by Captcrunch44
The 182 is the same way Single throw crank That’s why the funny ignition set up. With two different magnets

Cap, I just ran the 50-a that you passed on to me, it's a live one; and smooth as silk with the perfectly balanced Bolly 11.5 x 6.

Engine=====Saito 50-a early model
Fuel=======Wildcat 10% with 18% full synthetic
Prop=======Bolly 11.5" x 6"
Plug=======Glow Devil 4c for Saito and Enya
Exhaust====Stock for this engine
Idle=======Per picture
Max RPM==Per Picture

Photo's by Samsung Super 8

Early Saito 50 with A on the right lug


Rock steady and smooth, I did not move it from where Captain Crunch had it.


Speaks for itself
Old 09-27-2019, 12:16 PM
  #42465  
Jesse Open
 
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Congrats. Great music they make too.
Old 09-27-2019, 12:34 PM
  #42466  
Captcrunch44
 
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Boy Hobbs that is awesome
Old 09-27-2019, 12:50 PM
  #42467  
Jesse Open
 
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Cap44
Sure hope those mounts arrived by now(?)
Old 09-27-2019, 12:58 PM
  #42468  
Captcrunch44
 
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Originally Posted by Jesse Open
Cap44
Sure hope those mounts arrived by now(?)
oh shoot
yes they did I have been a little side tracked this last week.
They look great and will for great thanks
Old 09-27-2019, 12:59 PM
  #42469  
acdii
 
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Hey Mike, guess what I picked up a little over a week ago.
Old 09-27-2019, 01:37 PM
  #42470  
Glowgeek
 
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Originally Posted by acdii
According to the manual, there is no limitation to where the tank is positioned in relation to the carb with the exception of distance, 200mm Center of tank to center of engine.
Well that's not very far, 200mm = 7-7/8". Add half the length of the engine including firewall clearance to half the length of the tank and what your left with is the front of the tank maybe 2" - 2-1/2" behind the firewall. Better than glow though.

Last edited by Glowgeek; 09-27-2019 at 02:19 PM.
Old 09-27-2019, 03:13 PM
  #42471  
Jesse Open
 
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Seen YS glow tanks on a seaplane nearly 15 inches away.
Old 09-27-2019, 03:31 PM
  #42472  
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OK, I'll rephrase. Better than a non pumped conventional Saito glow carb. Better?

Last edited by Glowgeek; 09-27-2019 at 03:33 PM.
Old 09-27-2019, 04:29 PM
  #42473  
Jesse Open
 
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Well, actually it was a bit unfair. This being a Saito gathering.
Looks like a winner there acdii.
Old 09-27-2019, 04:53 PM
  #42474  
harrythor
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[QUOTE=acdii;12552927]If the FG-11 floods, it is possible the carb is damaged. It has a pump in it with check valves, and there may be some debris that is keeping one of them from fully closing, and that will cause it to leak and run poorly. I have never has gas leak out of it regardless of tank position. Might want to consider rebuilding with new gaskets. According to the there is no limitation to where the tank is positioned in relation to the carb with the exception of distance, 200mm Center of tank to center of engine.[/QU

the motor ran great . The only problem was the low adjustment changed considerable with fuel height. once the tank was down below half or more and the pumped had to pull instead of having the pressure of the fuel above the carb height the mixture would run leaner ,and need a readjustment. The motor would flood after sitting a hour or more after the motor shut down . break the siphon on the tank and it could sit with a full tank for ever. My motor was not the only one with the same conditions. Two other fg motors in the same air frame a 14c and another fg 11 were experiencing the same results. since i have lowered the tank to the center line all of the above conditions have stopped and the motor holds the same adjustments no matter the fuel level. so maybe i am compensating for a faulty carb but it runs like a swiss watch now .
Old 09-27-2019, 05:31 PM
  #42475  
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Originally Posted by acdii
Hey Mike, guess what I picked up a little over a week ago.
another Rascal 168.
I just bought another 300 twin

Last edited by Captcrunch44; 09-27-2019 at 05:38 PM.

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