Hobbsy

My Feedback: (102)

When you open the throttle it will quit instantly if its too lean and will smoke and stumble if it is too rich.

jlkonn

My Feedback: (1)

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

Hobbsy

My Feedback: (102)

Most likely it is rich and cooling the glow plug down, it probably gets shaky before it quits, correct.

jlkonn

My Feedback: (1)

no, it will just slowly idle down and quit running...

Hobbsy

My Feedback: (102)

If takes acceleration pretty well I'd say it's rich, I'll bet an 1/8th turn CW on the LS needle will speed up the idle.

jlkonn

My Feedback: (1)

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

William Robison

My Feedback: (3)

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.

N1EDM

My Feedback: (2)

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

Kimhoff

My Feedback: (22)

Does anyone know anything about the Saito 120 DP? It has 2 glow plugs. Are they any good and how old are they?

w8ye

My Feedback: (16)

10 or 15 years ago


They were OK but were much bigger & heavier than the current 120S that's soon to be dropped and replaced by the even smaller 125

badz

My Feedback: (1)

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.

Hobbsy

My Feedback: (102)

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.

badz

My Feedback: (1)

OS Max F glow plugs.

Hobbsy

My Feedback: (102)

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

Hobbsy

My Feedback: (102)

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.

badz

My Feedback: (1)

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.

w8ye

My Feedback: (16)

Do you fly out by the salt company's lagons? I have a friend "Cliff" that lives in Clinton.

badz

My Feedback: (1)

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.

w8ye

My Feedback: (16)

You are probably correct. I was looking through old E-mails and found where he was talking about it but there was no name.

Thanks,

Jim

canadagoose

My Feedback: (2)

My newest addition, an older MK2 FA-45 NIB, looking for another now.

w8ye

My Feedback: (16)

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

William Robison

My Feedback: (3)

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.

Kmot

My Feedback: (24)

Looks kinda plain!

j/k

Bipe Flyer

Ooooh, nice![8D]

What type of paint did you use?

canadagoose

My Feedback: (2)

I see that mine does look very plain now. Red, my favorite color too!