Welcome to Club SAITO !
12-26-2020, 07:03 PM
Lonnie, you know what WW11 fighter would be nice ? the VQ Hellcat, a Saito 72 or 82 would make it a monster.
Jim
F6F_46size - VINH QUANG RC MODELS
Jim
F6F_46size - VINH QUANG RC MODELS
12-27-2020, 03:57 AM
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Join Date: Dec 2001
Location: Colonial Beach, VA
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Glad to see y'all kept the place chatted up, I was sick for two weeks and then went out of town for 3 days.
My Merry Christmas is late but sincere, it's in the 20's here, I'll get back to the glow plugs in a day or two.
Lonnie, do you really need to lower that tank with the FG 21 having a pump carb. Thanks
PS, I'll pull the 150 rod again today.
My Merry Christmas is late but sincere, it's in the 20's here, I'll get back to the glow plugs in a day or two.
Lonnie, do you really need to lower that tank with the FG 21 having a pump carb. Thanks
PS, I'll pull the 150 rod again today.
12-27-2020, 04:27 AM
Dave, glad you're feeling better and safely home.
I believe it's important to locate the fuel tank for an FG just as you would for an FA. From the Saito FG manual:
"This new carb features a pump function designed to provide the correct amount of fuel to the needle valve assemblies to correctly operate the engines. It is not designed as a fuel pump to draw fuel from a tank mounted in the middle of your airplane. The fuel tank needs to be mounted as close to the centerline of the Carb assembly as possible; the same as we have had to do for all these years with our glow engine installations. If you stray very far from this rule, the engine will run differently upright and inverted. This usually leads to comments that an engine doesn’t like to run inverted, etc., when in reality, the fuel delivery system needs to be optimized for the engine installation being used. The pump is actuated by the negative pressure pulses when the intake valves are open and the engine is drawing fuel into the cylinder. On the latest version of the carburetor, we enlarged the area of the hole that delivers these pulses to the pump assembly. It has greatly improved the pumping action and has much more tolerance of ‘less than optimum’ fuel tank locations. But it is still not a Walbro carb and will not draw fuel from any long distance."
I believe it's important to locate the fuel tank for an FG just as you would for an FA. From the Saito FG manual:
"This new carb features a pump function designed to provide the correct amount of fuel to the needle valve assemblies to correctly operate the engines. It is not designed as a fuel pump to draw fuel from a tank mounted in the middle of your airplane. The fuel tank needs to be mounted as close to the centerline of the Carb assembly as possible; the same as we have had to do for all these years with our glow engine installations. If you stray very far from this rule, the engine will run differently upright and inverted. This usually leads to comments that an engine doesn’t like to run inverted, etc., when in reality, the fuel delivery system needs to be optimized for the engine installation being used. The pump is actuated by the negative pressure pulses when the intake valves are open and the engine is drawing fuel into the cylinder. On the latest version of the carburetor, we enlarged the area of the hole that delivers these pulses to the pump assembly. It has greatly improved the pumping action and has much more tolerance of ‘less than optimum’ fuel tank locations. But it is still not a Walbro carb and will not draw fuel from any long distance."
12-27-2020, 05:20 AM
If it's not too much trouble that would be great. Here's why:
In Mike Billington's review of the later 150 he came up with a CR of 9.9:1 using a combustion volume (CV) of 2.83cc. Using that CV and recalculating for CR using your piston pin to piston top measurement (.25 mm taller than the later 150) yields a CR of 11.93:1 for the early 150. Clarence Lee spec'd the early 150 at 11.24:1.
In Mike Billington's review of the later 150 he came up with a CR of 9.9:1 using a combustion volume (CV) of 2.83cc. Using that CV and recalculating for CR using your piston pin to piston top measurement (.25 mm taller than the later 150) yields a CR of 11.93:1 for the early 150. Clarence Lee spec'd the early 150 at 11.24:1.
Last edited by Glowgeek; 12-27-2020 at 05:22 AM.
12-27-2020, 05:28 AM
Swarf in my 150!
Having torn down my later version 150 for measurements I have found metal flakes in the crankcase. I overhauled this engine with new bearings a couple of months ago so I know it was spotless when reassembled. It ran fine with about 48 oz of fuel back then and oiled it up for storage. Pics later.
Update: Front bearing seal popped out. The engine ingested about 25% of it.
Update: Front bearing seal popped out. The engine ingested about 25% of it.
Last edited by Glowgeek; 12-27-2020 at 07:25 AM.
12-27-2020, 08:28 PM
Maybe Pete can slip him a can of Emu to settle him down?
12-27-2020, 11:12 PM
lonnie it's not just gary who see's those pics, i'm feeling gutted...saito has spent the last two hours excavating the back yard for some of the neighbourhoods long buried tomcats and bringing the bones to the outdoor patio as i sit here with my laptop and write this. He seems to be dropping them in a pattern you can read,,,so far i've got fa125 saito's suck and he's off digging another hole so more to come 
ps did you damage the rudder on the yak54 ( which i like to fly ) dangling it over asphalt ?
pps merry xmas all can't wait to get 2020 done and dusted
ps did you damage the rudder on the yak54 ( which i like to fly ) dangling it over asphalt ?
pps merry xmas all can't wait to get 2020 done and dusted
12-28-2020, 05:53 AM
lonnie it's not just gary who see's those pics, i'm feeling gutted...saito has spent the last two hours excavating the back yard for some of the neighbourhoods long buried tomcats and bringing the bones to the outdoor patio as i sit here with my laptop and write this. He seems to be dropping them in a pattern you can read,,,so far i've got fa125 saito's suck and he's off digging another hole so more to come
ps did you damage the rudder on the yak54 ( which i like to fly ) dangling it over asphalt ?
pps merry xmas all can't wait to get 2020 done and dusted
ps did you damage the rudder on the yak54 ( which i like to fly ) dangling it over asphalt ?
pps merry xmas all can't wait to get 2020 done and dusted
haha thought so.
12-28-2020, 04:56 PM
