Saito 72 vs 80 vs 82

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Saito 72 vs 80 vs 82

PostPosted: Fri Jan 30, 2009 8:57 pm

I'm thinking ahead.

I have a saito 82 and it's turning a bit over 10K peak (10,200, IIRC) with a apc 14x4W on 15% cool power and omega mix with a little extra castor added.

What kind of power do the 72 and 80 make? Is the 72 or 80 (older design) more powerful? I think the 80 is heavier?
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PostPosted: Fri Jan 30, 2009 8:59 pm

whats IIRC?
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PostPosted: Fri Jan 30, 2009 9:06 pm

IIRC: If I Recall Correctly
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PostPosted: Fri Jan 30, 2009 9:31 pm

Sotos wrote:IIRC: If I Recall Correctly


Right. And I'm getting my numbers from a globee intellitach, FWIW (For What It's Worth :angelic: )

I'm considering less expensive powerplants for possible future profiles. I wondering if the 82 is really that great. They seem to have gotten rather expensive.

Also, I seem to recall reading somewhere - rcgroups maybe that someone was getting about 11k rpm with heli fuel and a turbo muffler (whatever that is) with the same prop as me. What are expected 82 figures with my prop?

Thanks,
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PostPosted: Fri Jan 30, 2009 9:43 pm

Older 80 heavier and less power. http://saito-engines.info/index.html Check out the comparison of the three.
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PostPosted: Fri Jan 30, 2009 11:50 pm

The 72 and 82 are the same weight. The 80 is heavier.
Even if it's fifty bucks more, get the 82.

Try a 14x6 on that 82, you'll like it more than the 14x4, at least I do.
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PostPosted: Sat Jan 31, 2009 1:10 am

Is the 14x6 a wide prop like the 14x4W? What about its performance do you prefer? And you're talking about an apc, right?

Thanks
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PostPosted: Sat Jan 31, 2009 1:51 am

14-6 scimitar. http://www3.towerhobbies.com/cgi-bin/wt ... LXNGU4&P=7
don't confuse rpm with useable thrust. prop it in the 9500 range.

the 80's a good runner. less power thasn the 72 from the several I've flown on other peoples junk.

my 72 turns like 9500-9800 on a 13-6 scimitar. yanks my 4 lb. stuff all over the place, and they are cheap since the 82's popular now.

I've had a couple 82's, sold them. great power, shakers though. and that was before the 14-6 scimitar came out, I couldn't find a prop I liked. too many rpm for me on 13-6, tried several 14" props, wasn't satisfied.
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PostPosted: Sat Jan 31, 2009 3:01 am

last few saitos ive bought have been the 72's had the 82's and 72's and just really loved how smooth my 72's have been....and I know it will be said that my 82 must not have been tuned right and others will say that their 82's were as smooth as any 72 but I find the 72 is perfectly adequate for my 40 size slabs and have been smoother for me than the 82's so thats what I went with
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PostPosted: Sat Jan 31, 2009 6:45 am

same here i like the 72 much better than the 82,a lot smoother.
and they are a lot cheaper now when you buy them used sense the 82 is what everyone wants.
there is one now on FG for 160.00.
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PostPosted: Sat Jan 31, 2009 7:55 am

Oh, the S2. I've run an S2 11x5 on a couple of 46s. It turns much faster than an apc 11x5. I like the apc a better on my high wing trainer but I like S2 on my mustang pts.

I'll give the s2 14x6 a try.
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PostPosted: Sat Jan 31, 2009 9:12 am

Wild Fred wrote:don't confuse rpm with useable thrust. prop it in the 9500 range.



:exactly:

Unless you are going on a warbird or speed plane, then peak RPMs is not a concern. We don't do much flying at full throttle anyway. With my Saito's I'm hardly ever at full except for verticals. With the 2 cycles on 4 1/2 pound planes I find myself using full a lot more compared to a Saito on the same plane.
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PostPosted: Sat Jan 31, 2009 9:41 am

The 80 is a good scale engine as I recall....its is heavy.
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PostPosted: Sat Jan 31, 2009 9:51 am

rodneygt wrote:Oh, the S2. I've run an S2 11x5 on a couple of 46s. It turns much faster than an apc 11x5. I like the apc a better on my high wing trainer but I like S2 on my mustang pts.

I'll give the s2 14x6 a try.



rodneygt,You will like the "Dorkability" of the S-2 also! I routinely crash 'em on my 4d, they put up with much more abuse than APC!
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PostPosted: Sat Jan 31, 2009 10:25 am

Pecanman wrote:The 80 is a good scale engine as I recall....its is heavy.


Same size an weight as the .91 and 1.00 with a lot less power. Would make a sweet moter for a .60 sized trainer.
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PostPosted: Sat Jan 31, 2009 11:11 am

rodneygt wrote:Is the 14x6 a wide prop like the 14x4W? What about its performance do you prefer? And you're talking about an apc, right?


I like wood. I's rather break wood than bend a crank and they spool up faster. 14x6-anything that is NOT APC. They suck for 3D IMO because they are heavy. The S2 is good, even the Mas-K isn't bad if you want plastic.

Use ?x6 pitch for four strokes and ?x4 pitch for 2-strokes.
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PostPosted: Sat Jan 31, 2009 11:29 am

ThumbSkull wrote:
rodneygt wrote:Is the 14x6 a wide prop like the 14x4W? What about its performance do you prefer? And you're talking about an apc, right?


I like wood. I's rather break wood than bend a crank and they spool up faster. 14x6-anything that is NOT APC. They suck for 3D IMO because they are heavy. The S2 is good, even the Mas-K isn't bad if you want plastic.

Use ?x6 pitch for four strokes and ?x4 pitch for 2-strokes.


I like wood? :gay: :P
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PostPosted: Sat Jan 31, 2009 11:38 am

I like 6 pitch for about everything anymore, though I will us a 5 pitch on a 2 stroke to fine tune throttle response.
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PostPosted: Sat Jan 31, 2009 12:33 pm

14x6 scimitar is an awesome prop for an .82
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