the pope

Go with the the bigger engine . While others may dis agree I look upon the 82 as for a 46size 2stroke plane . For a sixty plane a 90 -100 and even up to a 125 4st is in order . Your old engine if its leaking out the front bearing that would be why its not tuning well . Its probably sucking in air .I dont know if I have mentioned this here or somewhere else recently but if you use a sealed bearing this can help . Does it shut down ok or does it want to continue to run ? Thats a sure sign . Cheers

the Wasp

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yee-up it does, and that is just why I'm pee'd off about it

Jim

rafeeki

My Feedback: (11)

I have a Saito FA 180 that I have been using for the last 2 seasons, Runs well with tons of power turning an APC 18x6 until last week when the muffler loosened twice causing the engine to cough in flight. Brought it down to try and diagnose it after I tightened the muffler it just wouldt start as it was flooded, big time.
To make a long story short turns out the pressure nipple on the muffler got clogged so as I was using it to pressurize the tank the fuel system could not vent pushing/flooding fuel into the carb every time I tried to fill up the tank.

Check the nipple for any obstruction.

the Wasp

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it is sealed, it's the stock part number, yet new and linking

there's a joke in there somewhere !!

Jim

the pope

theres some points in there as well

the Wasp

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LOL , and that my Saito friends is a joke LOL

the Wasp

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wow, now we have Bean adds on a RC Forum, I wonder if those Beans had anything to do with the nipple obstruction

Jim

Hobbsy

My Feedback: (102)

Jim, here is a side by side of an early .80 and an .82, the early on the left has 15.5 to 1 compression and now wears C&H Ignition set at 32 btdc, 35 degrees was not quite doable with the high compression. I don't remember the .82 numbers and don't currently have an .82. The .80 is from the late 80's and is still all stock with many hours.

Rudolph Hart

Damn sure there is but when you older it gets harder..if that makes sense.

No jim the baked beans was blazing saddles around the campfire,thank god you don't own a 125

the Wasp

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Old Fart,, I looked at some Prop Size/RPM numbers for the Saito 100 last night on the Tack Readings Page, and I was impressed,, it made me feel pretty stupid for passing up on that one new in the box for only $230,, yes I want my plane to be fast, but not overly fast, so after seeing those 100 numbers I figured the 125 would be more than what I really need for my VQ P-40,, after all it only has a 62" span,,, so even thO the 125 is only $5 more I have come to think the 115 would be the better choice,,, I'm sure she will really zip around with a 115..

as for Blazing Saddles, my son (27), loves that movie as much as Space Balls

BTW, thanks Hobbsy for the photos

Jim

Rudolph Hart

Jim not sure if i said this to you on another thread re your p40 and what size saito engine you should run.I have a cmpro midget mustang 55" wingspan and scales in a bit over nine pounds no fuel.It absolutely hammers along with a 115 and just about any prop you like the look of.I agree with popo on 82's being ideal for 46 size two stroke model my decathlon 46 size has an 82,awesome vertical performance and it's green..meaning no lead required to balance it.The 115 is very light (and saito 91 size) for the horsepower and no lead is required to balance the midget mustang either,hope this helps,if you choose the 115 you can throttle back a bit,it's a gem.I set the idle for 1700 when i fly it but it will happily idle at 1200 to 1400 and responds quickly to full throttle.I'd recommend a 15x8 mas for the p40 nice scale speeds just over half throttle.

blw

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I have to agree that too much OS talk is going on. But to that comment about OS having a good union for the workers I would disagree with that description. It's more of a cradle to grave care system than a union. Not knocking the Japanese system. My neighbor married his Japanese wife during the Korean war and there's certainly a lot to admire about their society and mindset.

About the FA-82 for 46 sized planes the FA-72 is no slouch after a few gallons of fuel. More power is always a good solution, of course but thought I would stick in a plug for the 72. It's gets a lot of bad press at times.

Hobbsy

My Feedback: (102)

Yes, the .72 was a fine engine, it was a tweener engine between the .62 and the .82 having no real place or need, same situation as the 1.15 between the 1.00 and the 1.25, no real need for the 1.15 either. The .72's bad press came from it's plastic back plate, for some reason the .82 never got that bad press even though it too had a plastic back plate. Not all of us are single brand owners. I mentioned before that I have an empty .82 crankcase and a crankshaft and cam. If I go on a parts buying binge, I'll have a complete .82.

the pope

I dont think they make a 72 anymore so with changing the backplate to a metal one and at some stage maybe a shortage of spares , so unless its cheap get the 82 . I think its a smidge lighter as well .

Rudolph Hart

Dave the 115 is no tweener and you know it.The 115 is lighter and smaller than the 125 and makes a smidge less power,having flown both i can assure you no difference in performance is noticable,except that the 115 likes to giddyup early on.Now..a bit of humour.My dog saito can't read your post so i've just told him you are insulting 115's and he's gone berserk and rushed out to the back yard...if he digs that 125 up and does weird things to it it's on your head pard

I liked your comments barry

Hobbsy

My Feedback: (102)

Saito 1.25 16x6 @ 9,000 rpm
Saito 1.15 15x6 @ 8,800 rpm
Saito 1.25 weight 24.69 oz
Saito 1.15 weight 23.49 oz
Difference===1.2oz

The 1.25 power way outweighs the weight difference.

Rudolph Hart

Well lets see what props we are talking here.With a couple of hours run time on the 115 i maxed the rpm out at 8850/8900 with a mas 15x8 and richened it to 8500 before flying the 115 in a midget mustang straight after that.No onboard flight data available but this is the combo that would rip the prop tips and make a nice boom over the field that onlookers initially thought was a backfire from the engine but later realized it was to loud,got a few free beers in the clubhouse out of that one.I've just looked up the horsepower figures for the 125 at 2.2 and the 115 at 2.1..not a big difference.

the Wasp

My Feedback: (1)

yeeaa, but OS got nothing over Club Saito or on those that know Saito

Jim

the Wasp

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after taking an hour looking at Saito's weights, I said screw it, come Monday I will transfer the money and order the 125, because, my God the 125 only weighs 2oz more than my OS 61fx, and in the end, if sometime I crash and smash and split my P-40 open, I will have a 125 for my next plane,,,, besides, a 62"span P-40 has more drag than a 55" span Mustang LOL

oh yeeaa, only $5 more

Jim

Hobbsy

My Feedback: (102)

Pete, if the 2.2 hp engine was a YS and the 2.1 hp engine was a Saito the YS guy would claim his engine could reverse the Earth's rotation.

Hobbsy

My Feedback: (102)

Jim, you'll love the 1.25, about 50 minutes break in will bring it to life, set the needles at about the 40 minute mark and they won't change much from there.

Rudolph Hart

Jim you ever been invited to a strangers house party and once you step on the front lawn the front door opens and you get charged by a small furry terrier type ankle biter who does laps around your feet? they got that high pitched yapping sound that makes you feel like picking it up and giving it a lazy drop kick over the fence into the next door neighbours yard,that's how two strokes sound to me and i'm glad you made your mind up and chose the 125.If this helps i flew one in a big h9 taylorcraft,it did everything you would want and more i also fly my 182 in the same plane but lets not quibble about horsepower please send some pics when it all comes together i'm interested to see how you go.

Hobbsy

My Feedback: (102)

Pete, I have sold off most of my two strokes, I kept the ones a lot of people would say I should sell, namely 5 OS LA's, a .10, two .25's, a .46 and a .65 I run as a Diesel. If there were a Saito .10 it would be sitting here.

Hobbsy

My Feedback: (102)

10 X 4 prop at 10,500 rpm

• Smaller case design for lighter weight
• Nearly the same case size as a .30, but packs more power
• As far as modelers are concerned, there’s no sound like the sweet sound of a Saito engine. Saito’s latest wonder is the FA-40a, which shares nearly the same case size as the FA-30, but packs a whole lot more punch. All this power coupled with solid Saito craftsmanship and the standard 3-year warranty is sure to make this potent little 4-stroke one of the year’s most anticipated engines.DisplacementBore/StrokeMuffler0.40 cu in (6.6cc)22mm / 17.4mmIncludedRPMWeightRecommended Propeller Sizes2,000 - 12,000301g2 Blade: 10x7 - 11x6

Read the first line of that AD. and then the last, interesting.
Re, Saito FA .40a

acdii

OMG, OF said something nice about a 125!! he must have found some happy pills!!!

On my Somethin Xtra I have a 72 and broke the 13x6 APC on it and put a 12x6 on that I had. It flew the plane, but what prop should I put on it to get more thrust for knife edge and vertical? The 72 is almost broke in, still needs a few more tanks still.

I Broke my Ultimate Bipe Friday, the Gemini quit right after taking off. I had throttled back a bit and engine wound down and quit, and since its a bipe and flying with the wind it immediately dropped nose and plunged. Turns out the stupid screw that holds the throttle arm to the barrel loosened up. Grrr, I prefer the way Saito attached the arm, with a set screw.