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Discussion Starter · #1 ·
Saito 72, 82, 91 rpms please????

I've looked at the 82, and can't tell from the info how much better it is than the 72. The ads say 20% more power than a 70. They don't say which one. Is the 82 more of a 72 or closer to the 91?

A 20% increase in power over my Saito 72 would be like a 600 rpm increase on a 14x4W. That equals about a pound more thrust, on paper at least.

The prop recommendations are pretty much the same for the 72.

Anybody able to shed some factual light on this for me?
 

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I've got two Saito 72's. I recently ran both on the new Master Airscrew K series 13x6. One peaked at almost 10,500 and the other at 10,100. I am flying the one that peaked at 10.5 on my OMP Edge. It is set for about 9800 flying condition with that prop. The other one is going on my next profile.

BTW: For the money, the new K series props aren't bad at all. Just a little less pull than the APC's but I feel the throttle is more managable, IMHO.

And I was using Wildcat 20/20 fuel at about 70 deg F.
 

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I just bought a Saito .82... Got a gallon thru it already. Ran 30 / 20 powermaster.

I tried these props:

13x6 MAS
13x6 APC
14x4 Wood Zinger
14x4w APC

I liked the 14x4w the best... I still can't get that really clean throttle response that I'm used to with my 2 strokes.... The power is awesome... But in a hover or low power, stalled manuever... it loads up in the mid range... Can find a way to clean that up...

So far I'm not convinced that this 4 banger is better than it's 2 stroke cousin.....
 

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Discussion Starter · #4 ·
My 72 runs about what Jim gets.

Paul, you do have an OS Type F plug, right? Otherwise, the H9 4 Stroke plug is OK too. 4 strokes are very touchy about plugs.

Put the tach on that 14x4W, and let us all hear the good news...

Also, I got a new Pro Zinger 14x4. I'll give it a try this Saturday.
 

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PaulSwany said:
I just bought a Saito .82... Got a gallon thru it already. Ran 30 / 20 powermaster.

I tried these props:

13x6 MAS
13x6 APC
14x4 Wood Zinger
14x4w APC

I liked the 14x4w the best... I still can't get that really clean throttle response that I'm used to with my 2 strokes.... The power is awesome... But in a hover or low power, stalled manuever... it loads up in the mid range... Can find a way to clean that up...

So far I'm not convinced that this 4 banger is better than it's 2 stroke cousin.....
Believe it or not, a gallon doesn't get these engines fully broken in. I have one with 2 gallons through it and it keeps getting better on throttle response and midrange. I have one with 8+ gallons and it idles and transistions noticably better than the newer one. I know other club members have experienced the same type of long break in with 91's, 100's and the big saitos as well (150/180).
 

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TailTwister said:
My 72 runs about what Jim gets.

Paul, you do have an OS Type F plug, right? Otherwise, the H9 4 Stroke plug is OK too. 4 strokes are very touchy about plugs.

Put the tach on that 14x4W, and let us all hear the good news...

Also, I got a new Pro Zinger 14x4. I'll give it a try this Saturday.
I'm using the stock Saito plug right now... I'll tac it next time I'm out... I'll have it at the Memphis Pro Bro if you wanna fly it..
 

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Jim D said:
Believe it or not, a gallon doesn't get these engines fully broken in. I have one with 2 gallons through it and it keeps getting better on throttle response and midrange. I have one with 8+ gallons and it idles and transistions noticably better than the newer one. I know other club members have experienced the same type of long break in with 91's, 100's and the big saitos as well (150/180).
I'm not giving up yet Jim... I have a Saito .91 on my Funtana and it totally rocks!! But I bought it used and it's well broke in... I just hope it cleans up soon... I hate dicking with the throttle when I'm trying to TR in my face!!!
 

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PaulSwany said:
I'm not giving up yet Jim... I have a Saito .91 on my Funtana and it totally rocks!! But I bought it used and it's well broke in... I just hope it cleans up soon... I hate dicking with the throttle when I'm trying to TR in my face!!!
I do understand. The newer one is on my OMP Edge and there has been a couple of times I entered a hover and it blurbled around in the mid and cause a good case of pucker.
 

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Here's my story. After the awsome experience I had with the Saito .91 on my Sledge (I've had the engine for years, never thought to put it on a 4 1/2 pound plane) I bought a .72 for my Burrito. I installed and broke it in at Houston. I run the same props on it as the .91. The .91 could run a bigger prop obviously, but the raw power I get is fantastic, and I really don't need anymore thrust!

The .72 is now on my EF Edge. It has plenty of power.

But, for my money and the 2 oz (Or there abouts) penalty, I'll take the .91. I'm real spoiled with the instant throttle, pure power, and OH that sound. The throttle response and power/torque are like the little electrics too me. I prefer the .91 to the .72.
 

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Discussion Starter · #10 ·
I'm looking at this for my Funtana. The 72 is marginal for power, and the 82 looks like a drop in boost.

3Dn'4Life has a 91 in his Funtana, and except for a complex cowl install, it looks good. For the difference in $$$, I might want to move my battery back a bit, and go 91. I flew his twice, and the power was great. It's hard to hover, because it just wants to climb out. I was flying at 1/3, and 1/2 pulled it from a hover. I never saw power above about 2/3, even on take off. The Funtana did not "feel" heavy with the 91 up front.

Then I have a good light weight engine when the OMP 65'er comes to pass... :D
 

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Yes, i love my 91 on my funtana its awsome!! :twisted:

I think mine will go in a OMP 65" yak too( when im done with the funtana and i have some more money :D)
 

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My Saito .82 really took a long time to break-in. I had over an hour on it on the test stand using what turned out to be a poor choice for fuel. I had to keep it so rich, I didn't think I could fly it. When I switched to Red Max 15%, it steadied right out, so I put it in the air on a 6 pound 2 oz. Ultrastick. It still had to be quite rich to avoid over-heating, so I babied at least another gallon through it. It improved slowly and steadily, so I checked the valve clearance, tweaked the low-speed needle, and dialed it in about 500 rpm below max. The throttle response was now crisp. It would take-off, downwind, in 2 revolutions of the wheels and would pull vertical until it was literally a dot in the sky. It was now my favorite engine on my least favorite plane, but for the next gallon of fuel, it would turn an APC 14x4W at 10,400 to 10,800 and was extremely responsive and reliable. It's now on my Mojo 60, awaiting for the Wisconsin glaciers to recede.
 

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I was reading it thinking funtanas? huh? :lol: :lol: :lol:
 

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Hey, Funtana's are great! Once you've mastered harriers and hovering with the U-Conned-Me 3D, you can progress to rolling harrier circles with the Funtana! The Ultimate 3D machine! :roll:
 

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I can harrier, Hover, TR, rolling harrier my Funtana 40. Its no Sledge or Kat but it will still do it....
 

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3Dn'4Life said:
I can harrier, Hover, TR, rolling harrier my Funtana 40. Its no Sledge or Kat but it will still do it....
:p
 

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