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new to 4-strokes

Old 01-10-2008, 06:41 PM
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Bretd123
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Default new to 4-strokes

i want a fourstroke for a twist 40. any suggestions? Saito or O.S.?
Old 01-10-2008, 06:43 PM
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Default RE: new to 4-strokes

Saitos are more expensive, but are higher in quality. Ofcoarse, O.S. four strokes arent bad either.
Old 01-10-2008, 06:49 PM
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Bretd123
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Default RE: new to 4-strokes

wat size would it take with an o.s.
Old 01-10-2008, 06:57 PM
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Default RE: new to 4-strokes

I don't know the answer to that, I have handled a Saito and a O.S. four stroke, just thought I would tell you.
Old 01-10-2008, 06:58 PM
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Default RE: new to 4-strokes

http://www.rcuniverse.com/forum/m_51...85/key_/tm.htm


A .70 would fly it nicely.
Old 01-10-2008, 07:09 PM
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Default RE: new to 4-strokes

Saito 72 or 82 would be the two I would pick between.

David
Old 01-10-2008, 07:10 PM
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Default RE: new to 4-strokes

Saito 82. You'll love it.
Old 01-10-2008, 07:59 PM
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Default RE: new to 4-strokes

I had a Magnum 70 four stroke in mine swinging an APC 14x4w prop when I had it. Nice combo.
Old 01-10-2008, 08:04 PM
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Default RE: new to 4-strokes

Saito ,72 with a 14x4w in mine. Awesome !
Old 01-10-2008, 09:32 PM
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Bretd123
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Default RE: new to 4-strokes

i am sort of a begginer, flown a pulse xt pnp, typhoon 3d, and avistar select. so i need something that is not too big. are any of these 4-strokes fit? what about this? http://www.horizonhobby.com/Products...ProdID=SAIE056
Old 01-10-2008, 09:50 PM
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Default RE: new to 4-strokes

It really depends on what you want to do. That .56 is a small engine with small power. If you want to fly calm circles and do mild aerobatics, it's just fine.

If you want to do stuff WAY WAY beyond that, get a SAITO .82. This is a light engine for it's power and it may be too much for what you need. Putting this engine on a .46 sized airplane is OVERKILL, but sometimes that is exactly what is desired. I had one on a .46 sized profile Katana and it hovered below 1/4 throttle, had more pull-out than a foamie and was just plain difficult to manage. BUT...it was fun as could be...more power than I ever needed. I hand-launched that thing most of the time....AT 1/2 THROTTLE.

So, that's.... .56 too small, .82 likely too large and the winner is.......up to you.

Good Luck!
Old 01-10-2008, 10:13 PM
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Default RE: new to 4-strokes

Agexpert is right that the 72 would be just about perfect but why not just get the 82. It's only a tad more weight and if you plan on 3d down the road you wil be happy you have the 82. Second I find it hard to believe that an 82 on a profile was hard to control. With proper throttle managment that is an awsome motor for a profile. I personally haven't flown a twist with a fourstroke (only a 46) but I have seen a twist with an 82 and it flew great. What ever you choose have fun.
Dan
Old 01-10-2008, 11:12 PM
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Default RE: new to 4-strokes

You should find a .52 to .56-size 4-stroke engine will provide plenty of power for a 3D airframe designed to fly with a .40 2-stroke. As several other folks have mentioned, however, sometimes too much of something is just the right amount.

The good news is that nobody markets a "bad" 4-stroke engine in North America. All of the readily available brands - YS Engines, Saito, O.S. Max, Thunder Tiger, and Magnum - are all good quality and reliable. They each have their own pluses and minuses, however, and folks will certainly argue over which they like best.

The Magnum XL .52 RFS is a very solid 4-stroke engine and a remarkable value at $129.99. The Magnum XL .70 RFS is also a very solid value at $149.99, but it's generally regarded as a bit more finicky to tune than it's smaller brother.

The Thunder Tiger F-54s and F-75s 4-strokes are also very solid choices, although the F-75s ($169.99) is available for $10 less than the F-54s ($179.99), so the larger engine would actually save you a bit of cash. Thunder Tiger 4-strokes are strong, reliable and a very good value.

The O.S. FL-70 is also a very good value at $179.99. This engine is a bit unusual in that it is non-ringed, uses an air-bleed carburator, and has a plastic backplate on it. It was designed to be an inexpensive but reliable 4-stroke, and O.S. has fit the bill nicely with this design.

Saito engines are very light weight and powerful. The .56, .62A, .72, or .82 would all be at home on a Twist .40 ARF. With prices ranging from $194.99 to $254.99, however, the downside of Saito engines becomes apparent. You have to pay for Saito quality. You will be rewarded with an engine that will serve you well for a very long time, however.

I have not listed the YS .63 because I don't believe it to be a good choice for a first 4-stroke engine. I also can't recommend the O.S. .56 or .81 4-strokes as their current prices are far too high when compared to similar Saito engines. With those three exceptions now noted, I believe you could buy any other 4-stroke engine that I've mentioned in this thread and be very happy with how they fly a Twist .40.

You have to decide between the Magnum XL .52 RFS, the Saito .82, or any engine in between. Good luck and good shopping!
Old 01-11-2008, 12:26 AM
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Default RE: new to 4-strokes

I agree with Ed , I have Saitos from .52 to 1.00 and Magnums 4 stroke from .52 to 1.20 The Magnums are good engines , their not as powerful as the Saitos but still produce good power. Only problem I`ve had , is the HS and LS needle tend to walk on them . The O-rings dont hold the needles well . But that really not a big fix.

The Saitos are my favorite . The .56 pulled my 4* really well and would work well in a Twist . You`ll hoover , but your going to be using most , if not all the throttle. You could try a 13x4 to see if that would help with the hovering type maneuvers .

The Twist with the .72 will roll 10 ft on take off , rotate straight up and out of sight Well hover at 1/2 throttle . Flys on the prop real good . It`s a good combination for the Twist or any .40 sized airframe.

I would recommend going with a .70 4 stroke over a .50 size , because you may want to try another heavier . 40 sized airframe and you`ll already have the engine.
Old 01-15-2008, 12:11 AM
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Default RE: new to 4-strokes

Saitos are awsesome engines and in most cases more powerful and lighter than OS. the saito 82 is great i have a number of them in different models and for their light weight and high output you cannot go past them IMHO

ps dont go 70 get the 82. this motor has a range of applications and is VERY light

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