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Old 06-05-2006, 01:30 PM   #1
Rod Bender
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4cy Engine Comparisons

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Hey Guys,

I have a YS 110, and am looking at getting a 91 and a 120-140 also. Since power\thrust\perfromance is not the underlined demand for me, I wanted to know your input(s) on Saito, OS, Magnum, Thunder Tiger etc ... The guys that fly warbirds in my area fly YS for balls out power, but they themselves claim that for sport or aerobatic style flying, a Saito, OS or other is just fine. Wanted some input from more minds ... Thanks, Greg
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Old 06-06-2006, 08:15 AM   #2
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I'd stick with an OS or Saito.

IMO, they're the best. Though I lean to the Saitos. I've got 3 of them, a 56, an 80 and a 120 (I sold the 120 and missed it, so I bought it back a couple years later!!) They are great engines! I've hung them upside down and they don't seem to care which way they're mounted.
Chris Rebidoux
Gravity works. I've tested it......often!!!
Building: Jerry Bates 1/4 Chipmunk
Vancouver Vanguard 1/6 Fairey Firefly
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Old 06-06-2006, 09:36 AM   #3
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Yup, that 1.20 was a great engine Chris.

I kinda regret selling it back to you!
Ron Mattiuz

Flying Tigers RC Club
"Flying an airplane is just like riding a bike...except it's harder to put cards in the spokes"
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Old 06-06-2006, 10:57 AM   #4
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Maybe you can SHARE!
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Old 06-06-2006, 12:36 PM   #5
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Enya 1.20R or better yet the 1.55R has my vote.

Lots of power, uses FAI or 5% Nitro, 10% TOPS, and sips fuel.. not like Saitos. I also like how clean the front end of the Enya is compared to OS or Saito. In the unlikely event of a crash... jeeze that sounds like an airline safety briefing, all the important and expensive parts are protected by the cylinder. They do take a weeeee bit longer to break in. But they last forever.

What size of Sport Aerobat were you looking at. Funny the YS 1.10 has been a favorite of IMAC/3D flyers in the 68 - 72 wingspan category but yes the 30% Nitro Heli fuel required to get the performance really does dent the old pocketbook.
Jim Daly
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Old 06-08-2006, 05:40 PM   #6
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I can only comment on Saitos. I love them. Under 1.20 and they don't burn a lot of fuel, 1.20, 1.50 and 1.80 have a reputation for being guzzlers but frankly I don't have a problem with them, use good throttle management. I have 2 1.50's and a 1.80 with CH electronic ignition and I left them on glow. Great low idle, super transition and big power. Just love that first flip start with no kickback.

I am just getting a Balsa USA 1/3 Sopwith Pup ready to fly. Put in a Saito 300 twin using CH electronic ignition. Got it fired up yesterday and about 1.5 hrs on it in the garage. So far I am turning a 24x10 at 5300 and I can idle it at 900 real steady. Hard not to like it. Wait till it's broken in.

I fly 50's, 72's etc and they all run great. Inverted, sideways, right side - it just doesn't matter. Break them in wet, run a tad rich (peak needle valve rpm on a tach and then back down about 300 rpm) and they will run perfect forever.
John Kovats

aka Johnny Versatile

MAAC 65460

Hespeler Model Aviators Inc.
Cambridge Float Flyers

I don't have the answers, but I have a personal relationship with the Guy that does.
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