Welcome to Club SAITO !
#1152
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RE: Welcome to Club SAITO !
If you are running it on the ground and you have it at full throttle then close it.
Should the idle rpm immediately be established?
If it idles at a higher speed for a few seconds then slows what does that mean?
Thanks!
JLK
Should the idle rpm immediately be established?
If it idles at a higher speed for a few seconds then slows what does that mean?
Thanks!
JLK
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RE: Welcome to Club SAITO !
I'll try it next time we get a break in the weather here in Iowa.
Was beautiful today.
First time I've flown off the playing fields at the city park.
Very nice place to fly.
I forgot my darn transmitter tray though...[sm=crying.gif]
Yeah, I'm one of those but I went ahead and flew two flights anyway.
See I can do it without it after all...
One thing about the UCD 60...it's very easy to land.
JLK
Was beautiful today.
First time I've flown off the playing fields at the city park.
Very nice place to fly.
I forgot my darn transmitter tray though...[sm=crying.gif]
Yeah, I'm one of those but I went ahead and flew two flights anyway.
See I can do it without it after all...
One thing about the UCD 60...it's very easy to land.
JLK
#1157
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RE: Welcome to Club SAITO !
John:
Several ways to check the idle, when all is right the engine should idle indefinitely, stopping only when it runs out of fuel.
Pinch test - with the engine running at idle pinch the fuel hose shut. If the rpm falls immediately it's too lean. A large gain in rpm shows a rich mixture. When right there will be either a slight gain in rpm or no change, after a few seconds the engine will die.
Transition test - done by going to full throttle from idle. If the engine dies it's too Lean, or if the rpm falls momentarily before accelerating it's also too lean. If it stumbles or blubbers before gaining rpm, it's too rich. When right the rpm will follow the throttle.
In general use the pinch to get you in the ball park, then use th transition to refine the setting. This is for all our model engines, not just Saitos and not just four stoke engines. All with the simple carbs without any acceleration enrichment.
-----------------
coveredup:
Use the feeler marked 0.0015" to set the valves. See picture.
Bill.
Several ways to check the idle, when all is right the engine should idle indefinitely, stopping only when it runs out of fuel.
Pinch test - with the engine running at idle pinch the fuel hose shut. If the rpm falls immediately it's too lean. A large gain in rpm shows a rich mixture. When right there will be either a slight gain in rpm or no change, after a few seconds the engine will die.
Transition test - done by going to full throttle from idle. If the engine dies it's too Lean, or if the rpm falls momentarily before accelerating it's also too lean. If it stumbles or blubbers before gaining rpm, it's too rich. When right the rpm will follow the throttle.
In general use the pinch to get you in the ball park, then use th transition to refine the setting. This is for all our model engines, not just Saitos and not just four stoke engines. All with the simple carbs without any acceleration enrichment.
-----------------
coveredup:
Use the feeler marked 0.0015" to set the valves. See picture.
Bill.
#1158
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RE: Welcome to Club SAITO !
Coveredup,
If you need a manual, you can find one on line at http://www.horizonhobby.com/ProdInfo...ER_2005_10.pdf.
Usually this loads pretty fast, but tonight it was awfully slow, so don't give up hope if it takes a while. Only about 1.64MB
Hope this helps
Bob
If you need a manual, you can find one on line at http://www.horizonhobby.com/ProdInfo...ER_2005_10.pdf.
Usually this loads pretty fast, but tonight it was awfully slow, so don't give up hope if it takes a while. Only about 1.64MB
Hope this helps
Bob
#1161
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RE: Welcome to Club SAITO !
At the local flying field the other day another saito user told me my saito's are idling too high...he said they should putter real low around 1000-1500 rpm....mine seem to all idle around 2000-2800 is this actually to high? Also I'm running 15% fuel he told me it's too much drop down to 10% or even 5% that saito don't need all the nitro content...I own (2)150's (4)82's 1(180) and 1(65) the engines in particular we where discussing was my 150 in a Sig 300XS and my 82 in a Hangar 9 Cap232. Also both are well broken in...I've tried idling them down but they seem to just be erratic and stall out...kinda puzzled cause his 82 had such a low steady idle.
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RE: Welcome to Club SAITO !
Just about everything that guy told you is wrong. You can get almost any Saito to idle at 1,500 rpm but 2,200 to 2,300 is much smoother and much better for quick throttle response. It sounds like your LS needle is too rich and what plug are you running.
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RE: Welcome to Club SAITO !
Not a plug issue then. I should have asked if you have a test stand to do the carb setup. If so, peak the HS needle and then turn the LS needle CW 1/8th turn at a time time checking the transition and full throttle perforance after every other LS needle change, after finding the idle and transition that suit you richen the HS needle to you fly setting and go fly. Just don't fly the test stand.
Jim, I swapped these out and kept the one with the smily
Jim, I swapped these out and kept the one with the smily
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RE: Welcome to Club SAITO !
Not a plug issue then. I should have asked if you have a test stand to do the carb setup. If so, peak the HS needle and then turn the LS needle CW 1/8th turn at a time time checking the transition and full throttle performance after every other LS needle change, after finding the idle and transition that suit you richen the HS needle to you fly setting and go fly. Just don't fly the test stand.
#1166
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RE: Welcome to Club SAITO !
Yes I got a test stand..I'm pretty certain I got a good tune on them but I'll recheck them. If weather holds I'll be out flying today hopefully.
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RE: Welcome to Club SAITO !
No I fly at a local field in Syracuse called WAM or on Hill AFB....there's a field in Hooper back near the bird refuge, maybe thats the field he's talking about it's a salt bed field.
#1171
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RE: Welcome to Club SAITO !
That one is nice and clean. A guy at the field has one on a R/C assisted free flight Record Breaker. After take-off he just put-puts around. Another had one on the shelf for 15 years. We got it down, oiled it, and let it set for about a week. Fired up first flip and ran like a top.
Enjoy,
Jim
Enjoy,
Jim
#1172
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RE: Welcome to Club SAITO !
Mr BadZ:
You are on the Saito list as number 152.
Any Saito will idle at 1000-1500 rpm with a big enough (heavy) prop on it, but it probably wont have enough effective power to make you happy. As Jim said, most of what that fellow told you is, while not necessarily wrong, it mostly goes against common proven practices.
The correct idle rpm is where you're happy with it. I like the plane to stop rolling at idle without using brakes, on pavement. Beyond that I don't worry about what rpm it's actually running. If you check the prop on his FA-82, it's probably a large diameter and low pitch. The FA-82 is not known for a low idle speed.
The Saitos will run, and run well on low nitro, but they get happy at 15%, many people feed them on 20% or higher. Some of the older ABC engines don't like to go higher than 15%, but all the AAC engines run fine with the higher percentages.
Bill.
You are on the Saito list as number 152.
Any Saito will idle at 1000-1500 rpm with a big enough (heavy) prop on it, but it probably wont have enough effective power to make you happy. As Jim said, most of what that fellow told you is, while not necessarily wrong, it mostly goes against common proven practices.
The correct idle rpm is where you're happy with it. I like the plane to stop rolling at idle without using brakes, on pavement. Beyond that I don't worry about what rpm it's actually running. If you check the prop on his FA-82, it's probably a large diameter and low pitch. The FA-82 is not known for a low idle speed.
The Saitos will run, and run well on low nitro, but they get happy at 15%, many people feed them on 20% or higher. Some of the older ABC engines don't like to go higher than 15%, but all the AAC engines run fine with the higher percentages.
Bill.