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Best prop for Saito 180

Old 08-08-2003, 05:46 PM
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john316
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Default Best prop for Saito 180

I am currently running an APC 17x6 prop on my Saito 180 in a GP G-202 ( 73 inch wingspan). I don't seem to be getting enough speed to carry me through the verticals. Thrust is good but I lose too much speed and the response gets a tad mushy at the top. What are you guys running on this engine in similar sized airframes?

JMW
Old 08-12-2003, 07:22 PM
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john316
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Default Best prop for Saito 180

A gentleman on another forum says he is running a 17x10 Bolly and 30% nitro fuel at 9400 rpm on his 180, anybody else pulling this much prop? I'm only getting about 9200 on a 17x6 APC on 15%.

JMW
Old 08-13-2003, 12:01 AM
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mndbndr3d
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Default Best prop for Saito 180

I'm using 17x6 APC on my saito 180GK and running 30% fuel w/ 9800 rpm. unlimited vertical!
Old 08-13-2003, 12:15 PM
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Default Best prop for Saito 180

What airframe is that and how much does it weigh?

JMW
Old 08-13-2003, 11:17 PM
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mndbndr3d
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Default Best prop for Saito 180

It's on a ohio rc extra 300L 74" wingspan w/ a weight of 11.5 pounds.
Old 08-20-2003, 04:37 PM
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Default Best prop for Saito 180

I tried the 16x8 APC yesterday and it's a mixed bag, more speed but of course less low speed thrust so the jury is still out on which one I like best. I was carrying a little more speed on the uplines which kept the controls tight and crisp but the downline braking was non-existent. I'm getting 9000 on the 16x8 versus 9200 on the 17x6 (both leaned for flight). I can't imagine this engine pulling a 16x10 prop.

JMW
Old 08-20-2003, 10:28 PM
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mndbndr3d
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Default Best prop for Saito 180

I just broke my 17x6 prop and my local hobby shop does not have this size. Do you guys think that a 18x6 wood prop would be too much for this engine? It's definitely lighter than my previous APC17x6, so I figure it's not too much for the engine.
Old 08-21-2003, 12:00 PM
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john316
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Default Best prop for Saito 180

I tried the APC 18x6W and it was way too much for this engine!
I would stick with either APC or Mezjlik 16x8 or 17x6. Some folks say they have tried the APC 17x8N with good results. A lot of it depends upon how much nitro your willing to burn i.e. 30% and you can pull a 17x8 easily but on 15% the engine seems to struggle too much. Also the weight and type of airframe as well as type of flying you are doing is going to make a lot of difference as well. I fly the IMAC manuevers and I need a good balance of speed and vertical penetration. I just haven't found that perfect combination yet that will work with the 180 and my airframe. What airpalne are you flying and what is the weight and type of flying you are doing? Also, what nitro content do you run.

JMW
Old 08-21-2003, 12:31 PM
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P-51B
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Default Best prop for Saito 180

I have been using a pro-zinger 18x6 and getting around 8800-9000 rpm. Others have told me that the Mejzlik 18x6 is the way to go, but I haven't been able to get my grubby little hands on one yet.
Old 08-21-2003, 11:17 PM
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mndbndr3d
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Default Best prop for Saito 180

I have a mejzlik 17x10 on my plane (temporary) right now and comparing it to my previous prop (apc 17x6) it is a little slow. I just have to run it a little lean.

P-51, I'll sell my mejzlik 17x10 if you want $25. I got it for $40 and it's been used to brake-in my saito 180 plus a couple of flights. no damage! it has a 11mm hole for my saito. let me know if you want it.

Harold.
Old 09-17-2003, 05:37 PM
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Geistware
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Default RE: Best prop for Saito 180

With a Saito 180, you should get over 9500 rpm with that propeller.
What RPM are you getting? I had a gas engine in that plane turing a 20x10 at 7300rpm and I still didn't have unlimited vertical.

ORIGINAL: John Weber

I am currently running an APC 17x6 prop on my Saito 180 in a GP G-202 ( 73 inch wingspan). I don't seem to be getting enough speed to carry me through the verticals. Thrust is good but I lose too much speed and the response gets a tad mushy at the top. What are you guys running on this engine in similar sized airframes?

JMW
Old 09-18-2003, 08:07 AM
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john316
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Default RE: Best prop for Saito 180

Geistware, I am turning right at 9400 leaned to the max with the 17x6 APC. I fly it richened up for a 200 rpm drop i.e. 9200. This is on Omega 15% fuel. The airplane goes up pretty good when I push the loud handle forward. A lot of the control mush I was talking about I have been able to eliminate by increasing my control rates with the ATV feature on my radio. Part of the control softness I believe is coming from the Hitec 605 servos I am using, they seem a tad loose around neutral. If I could do it over I would not use these servos on an aerobatic aircraft! Anyway my only complaint with the 17x6 is a notable lack of downline braking action. I tried the APC 16x8 and had more speed but lost a lot of vertical and the downline braking was dismal. I probably would not purchase another Saito 180 for this size aircraft, compared to a Moki 180 or even an OS 160 FX, it comes up lacking and is way expensive. Just my two cents.

jmw[:@]

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