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Saito 1.80. tach readings

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Old 10-17-2002, 04:17 PM
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TD1
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Default Saito 1.80. tach readings

20% synthetic oil, 20% nitro, APC 16x8 9700 rpm, I want to try the Mejzlik 17x10 and the APC 18x6w during the weekend
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Old 10-18-2002, 12:15 AM
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Default What plane

This engine has always been in the back of my mind. Let me know how you make out and what you think. What kind of break in does it need?
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Old 10-18-2002, 08:25 AM
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Default Saito 1.80. tach readings

I love my Saito, I'm thinking in buying another one. This is a great engine with loads of power, and character specially the GK version. You just have to be patient with the running in procedure takes about 3 gallons after that runs flawless. Never had to change any of the factory preset settings for idles and middle range you get an instant throttle response all the way to full power.
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Old 10-18-2002, 09:08 AM
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Default GK Version

What is that?
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Old 10-18-2002, 11:26 AM
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Default Saito 1.80. tach readings

My Saito 180 turns a Mejzlik 20/6 to 7900 rpm running 15% Red Max Syn. It's mounted on a GP Giles 202, and flys it very well, not 3D though.
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Old 10-18-2002, 01:31 PM
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Default Re: GK Version

Originally posted by bob_nj
What is that?
GK = Golden Knight version, think it is just black annodized.
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Old 10-22-2002, 05:39 PM
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Default Saito 1.80. tach readings

I use Wildcat 4cycle 15% fuel. APC 16X8 prop @9500RPM. Motor has about 8 tanks through it.
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Old 10-22-2002, 05:47 PM
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Default Saito 1.80. tach readings

I have a "new" GK (less than 1 gallon of 10%) I am getting 8000 turning a pro-singer 18x6.
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Old 10-28-2002, 01:13 AM
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Default Saito 1.80. tach readings

Only one for you guys today.

90F, just about sea level (Florida), Wildcat 10%, engine has 3-4 gallons through it, Schimtar (sp?) 17x8 wood was spinning at 8200 conservatively tuned. I will try more later in week.
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Old 11-18-2002, 03:28 AM
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Default Saito 1.80. tach readings

Originally posted by Daleroger
My Saito 180 turns a Mejzlik 20/6 to 7900 rpm running 15% Red Max Syn. It's mounted on a GP Giles 202, and flys it very well, not 3D though.
a 20" prop is way too big for this engine, no wonder you are only getting 7,900 RPM's...

Try an 18x6 and you will be much happier... you will gain about 1,000 RPM's and a lot more thrust!
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Old 11-18-2002, 03:30 AM
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Default Saito 180c

Ok, heres mine:

RPM's: 9,000
Version: C
Prop: APC 17x8
Fuel: Wildcat 15% nitro/18% all synthetic oil fuel (w/4 oz. of Klotz all synthetic added to each gallon)
Glow Plug: O.S. Type "F"
Other: Field elevation 750 ft. MSL, temp 35-85 F
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Old 11-18-2002, 01:04 PM
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Default Saito 1.80. tach readings

My theory on the 20/6 Mejzlik / Saito 180 is;
It's quiet, it mades for great brakes on a downrun,and it keeps the unloaded rpm's under 9,000, anything above which is asking for trouble,as least on my "A" stamped engine. As for the thrust, I have never checked it, but it is substantial . The 12 1/2 lb Giles is off in about 20 feet and pulls straight up. I do have an 18/8 though, and will give it a try.
Thanks,
Dale
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Old 11-18-2002, 09:49 PM
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Default Saito 1.80. tach readings

The largest diameter prop Saito recommends is a 17"

Using a larger prop is like having the manifold pressure too high and the RPM's too low on an engine with a constant speed prop... Basically you could cause more harm than good... kinda like driving your car in 5th gear at 30mph... it works, just not really well and your engine doesn't like it...

I would say if you want to stay big, I wouldn't go any larger than an 18x6 (MAYBE an 18x8 max)...

BTW on my 12 lb. Edge 540 about the only time I use full power is take-off and vertical maneuvers... and in those situations the prop loading is such I don't think it is unloading to any great degree....

Actually Saito seems to push the APC 16x8 prop for this engine... that turns an extra 500 RPM's MORE than the 17x8... go figure!
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Old 11-26-2002, 02:04 AM
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Default Saito 1.80. tach readings

9300 rpm. APC 16-8. 15% Byron Fuel. Still quite new. I only have about 1.5 gallons of fuel ran thru it so far.
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Old 11-26-2002, 02:45 AM
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Default Saito 1.80. tach readings

Temp was about 60 on Saturday morning, I'm near sea level in Florida. Broke my 17x8 wood so threw on the Master Airscrew "classic series" 18x6. Running 10% Wildcat (18% synthetic blend) I was at 8860RPM stable and 5-6 clicks below peak.
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Old 12-11-2002, 03:24 PM
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Default Saito 1.80. tach readings

I get 9300 on mine with a 17/8N APC, and 30% Wildcat Synthetic, with 2ozs. of Castor added. It`s in my DP Ultimate. Hovers at 2/3 throttle, and flys out with authority. I`ve been doing some informal testing with narrow blade props. So far my 180 likes them them a lot.
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