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Please post Saito 125 rpms..

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Old 09-28-2009, 09:26 PM
  #76  
w8ye
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Default RE: Please post Saito 125 rpms..


ORIGINAL: ton2di

Hello Tcraft, w8ye

I have tried a mejzlik 16-8 earlier and the rpm is only about 8,100 ( motor seems to be running hotter because of the load). It doesn't seem to make my p-51 faster. (maybe because is was too windy here in the east coast today). I think I like the apc 15-8 at around 8,700 - 8,900 because of the thrust and speed that it gives. My other option is an apc 14-10 with around 9k rpm , but the pull at take off is noticeably less and the top end is only a little faster. (We can't have it all I guess)
This goes along with my experience

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Old 09-29-2009, 11:01 AM
  #77  
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Default RE: Please post Saito 125 rpms..

Hey Tony,
Good to hear you're still using your 1.25. I've pretty much settled on the MA15-8 for my Edge. Seems to give me the most pull at take off and for hovering which I'm still trying to improve on.I checked the valve/tappet clearance this morning and found it to be .0065 to .007 on both intake and exhaust so Iset them both to .003 clearance. I have no idea what, if any, difference this might make in the motors performance. I am wondering what difference there might be between APC 15-8 and MA 15-8. I guess I'm not willing to spend the money on test props since I already have several that don't meet my needs.Good Luck!
Dave
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Old 10-04-2009, 12:50 AM
  #78  
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Default RE: Please post Saito 125 rpms..

I run 16 X 6 and 17 X 4W depending on the plane

my 125's when new I ran a 15 X 6 on them for the first couple gallons. They wanted to run hot at first on a 15 X 8

I have three 125's and two FG-20's

I have some planes that I may have to use a 14 X 10 or 15 X 8 on though in the future

Saito 125 old and new compared








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Old 06-12-2010, 10:12 PM
  #79  
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Default RE: Please post Saito 125 rpms..

I'm starting to doubt my saito 125. I have been running an apc 15x8/14x10 on my h-9 p-51 and my friend flying his new h-9 p-47 with an OS 110FS-a with the same prop/fuel combo. (15x8 apc) with 15% omega is a bit faster than mine. For some reason even if our rpms on the ground are almost identical (8,700 on the ground- because of humidity) his engine will slightly unload more in the air ... I don't know the reason for this, but I'm thinking that his OS FSA110 engine has more power than my saito 125.
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Old 06-15-2010, 12:15 PM
  #80  
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Default RE: Please post Saito 125 rpms..

ton2di are you running the muffler on the saito? Also you cant compare speed on a different plane. With no muffler you can expect about 300-400 more rpm on the Saito. All saito engines respond best with more nitro. I usualy run 35-45% in mine. 20% nitro is the lower limit to me for the Saito's. My Saito 125 on 45% is very close in power to the OS120AX with muffler both will spin a 13x11 APC at 11,300

Also run the 15% powermaster fuel i dont think omega is that great of a fuel could be wrong if your going to run 15%.
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Old 06-16-2010, 10:42 PM
  #81  
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Default RE: Please post Saito 125 rpms..

Thanks for the advice airraptor. I will try a 30% fuel this weekend and see if there's a speed improvement... or if I could fly faster than the os 110 with a 15x8.

thanks,
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Old 09-12-2011, 08:05 PM
  #82  
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Default RE: Please post Saito 125 rpms..

Going to maiden my H9 p-47 with APC 15x8 (Omega 15%). Engine has about 5 tanks through it on the ground. Any prop advise? Would a 15x7 be better for its first flight?
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Old 09-12-2011, 08:13 PM
  #83  
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Default RE: Please post Saito 125 rpms..

Jriley1974,

Apc 15x8 should be fine. THat plane is very forgiving and is fun to fly. MAke sure you lean the low end needle after break-in because it will consume a lot of glow fuel at the original setting.

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Old 09-12-2011, 08:31 PM
  #84  
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Default RE: Please post Saito 125 rpms..

I really like the 14x9 3-blade with my 125 on warbirds....
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Old 09-29-2012, 12:50 PM
  #85  
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Default RE: Please post Saito 125 rpms..


ORIGINAL: w8ye

I have three Saito 125's and two Saito FG-20's

The APC 15 X 8 runs less RPM than a APC 16 X 6 on a 125

A 15 X 10 or 16 X 8 is too much prop for a 125

I realize this thread is old, but I found the results interesting and thought others might be interested in the results I had with the Saito 125. 65 degrees, 1450 feet asl, 15% nitro Wildcat Premium with 16% oil, after 80 ounces and about 90 minutes breakin. All readings rounded down to nearest 100; Static testing.

Zinger wood 16 x 6, 8500 rpm
Master Airscrew 4 cycle 16 x 6, 8500
Master Airscrew 4 cycle 16 x 8, 8400
APC 16 x 8, 8500
Zinger wood 16 x 6-10, 7300
Zinger wood 16 x 4 three blade, 8500

I did not expect the engine to do so well on 16-8's; Like W8ye I thought they would have been too much. (I calculate that the load of a 16 x 8 to be 133% the load of a 16 x 6 of the same design).
I want to run three bladers on a scale model, and 17inch diameter would be scale. Looks to me like I can go to a 16 x 5 or 17 x 4 three blade and still be within the engine's comfort zone.

I'm impressed with the Saito 125.

Reliable idle was 2100 except APC @ 1900. I have not touched the low speed setting; transition was flawless
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Old 09-29-2012, 01:27 PM
  #86  
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Default RE: Please post Saito 125 rpms..

Hello,

What pane do you intend to put it in?

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Old 09-29-2012, 07:53 PM
  #87  
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Default RE: Please post Saito 125 rpms..

Twin Otter, 1/6th scale by John LaBelle, 132" wingspan, about 38 pounds.
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Old 11-01-2012, 08:27 PM
  #88  
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Default RE: Please post Saito 125 rpms..

Reactor bipe
20/20 YS fuel..
Master Airscrew 15x7 3-Blade don't have Rpms....
Pleased to say, the prop performed almost as my MA smintor 16x6 2-blade....
I had broke my other prop and wanted to fly...so I placed the 3 blade on it...
The MA 3 blade instructions says to NOT do violen snaps ect... with this prop on the engine...
I did some anyway....no issues.... ran out of gas and the gear needs reapair....
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Old 11-02-2012, 08:03 AM
  #89  
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Default RE: Please post Saito 125 rpms..

I ran the second Saito 125, on 15%, at 49 degrees, with same props as first engine turning about 100 rpms less than first engine at 65 degrees. Also ran the following:
17 x 6 Xoar wood two blade, 8200 rpm
15 x 7 MAS three blade, 8700 rpm
16 x 8 Zinger wood two blade, 7600 rpm

(Aside: the Xoar prop was a thing of beauty; it is the only prop I have ever had that came balanced, both tip to tip and hub to hub, out of the box.)
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Old 07-14-2019, 06:22 PM
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Default

Originally Posted by Hobbsy View Post
J, you're using a very poor choice of fuel, get some decent fuel with an 80/20 syn/castor blend and you see about 9,200.
Two thumbs up!
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