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Which 4 Stroke Engine to get for a 81" Top Flite Cessna 182 ?

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Ayesha Abdullah

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Dec 21, 1999, 3:00:00 AM12/21/99
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I am planning to build a 81" span Top Flight Cessna 182 which require a .91
to 1.2 4 Stroke Engine or a .6 to .9 2 stroke.


For the 4 stroke engines, there are so many Choices, Saito FA-91S, OS
FS-91SII, Magnum 0.91RFS.
Does anybody have any suggestions on which is the best engine?
The Magnum brand is much cheaper than the other two. Is it of comparable
quality ?
There are some posts on the web on liner peeling problems with OS. Is Saito
better?
I have an OS 0.26 and it seems to be ok for the last 6 months that I have
owned it.

The other option would be to go with a 2 stroke.

Since I am new to the hobby, I do not know if I should go with a 2 stroke
or a 4 stroke. What are the pros and cons and what are the suggestions?

Thanks

Zia


Ivo

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Dec 22, 1999, 3:00:00 AM12/22/99
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In article <83psp6$3b5$1...@news02.arb1.te.uudial.us.uu.net>,

"Ayesha Abdullah" <a...@dellnet.com> wrote:
> I am planning to build a 81" span Top Flight Cessna 182 which require
a .91
> to 1.2 4 Stroke Engine or a .6 to .9 2 stroke.
>
> For the 4 stroke engines, there are so many Choices, Saito FA-91S, OS
> FS-91SII, Magnum 0.91RFS.
> Does anybody have any suggestions on which is the best engine?
> The Magnum brand is much cheaper than the other two. Is it of
comparable
> quality ?
> There are some posts on the web on liner peeling problems with OS.
Is Saito
> better?

There have been no liner peeling problems that I'm aware of with OS
FOUR-stroke engines. For a plane that size, I'd go with either the OS
or Saito 120.


> I have an OS 0.26 and it seems to be ok for the last 6 months that I
have
> owned it.
>
> The other option would be to go with a 2 stroke.
>
> Since I am new to the hobby, I do not know if I should go with a 2
stroke
> or a 4 stroke. What are the pros and cons and what are the
suggestions?
>
> Thanks
>
> Zia
>
>


Sent via Deja.com http://www.deja.com/
Before you buy.

David Houston

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Dec 22, 1999, 3:00:00 AM12/22/99
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Ayesha,

A four-stroke seems like a great choice for a scale Cessna. It is probably
easier to fit the four-stroke in the cowl then it is a two-stroke (unless
you get some sort of after-market muffler, and that will raise the cost of
the two-stroke up to the cost of the four). The sound of the four-stroke
will add to the realism when it is in flight. And the four-stroke will more
easily turn a prop that is scale size.

I have only owned the Saito 91. I have 60+ flights on it (plus an hour of
break-in time) and am very pleased with it. People at the field have equally
good luck with the OS four-strokes. The peeling problem is specific to the
.46 FX two-stroke, so don't worry about that. Regarding the Magnum, it seems
there was some discussion of that on this newsgroup recently - check
www.dejanews.com. Seems the opinions were mixed.

Best of luck on your project.
David


Learjet35x

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Dec 22, 1999, 3:00:00 AM12/22/99
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>I am planning to build a 81" span Top Flight Cessna 182 which require a .91
>to 1.2 4 Stroke Engine or a .6 to .9 2 stroke.

Go with the Saito 150.... same size and weight as the 120 but more powerful and
versatile... you can always throttle back a big engine, but if the little
engine doesn't do the trick you are stuck with it...


LearJ...@NO-SPAMaol.com

<remove NO-SPAM from email address to respond>

Greg Evans

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Dec 22, 1999, 3:00:00 AM12/22/99
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hi,

no matter what engine you choose it will fly very well.

you said that you were new, right? i hope you have a lot of building
experience! this plane isn't one of your normal slap togethor kits! it
is for experienced builders and will take a very long time to build! it
has a lot of detail and a lot of work to go into it.

but when it is done, it will look like a masterpiece and fly very
well... but don't expect it to fly very aerobatically. it flies very
scale like.

greg


John Lever

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Dec 22, 1999, 3:00:00 AM12/22/99
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Oh, I disagree here. Too often you feel the need to throttle up and the
power of that 150, or now, 180, would rip the poor plane apart. It really
wasn't designed for that power. And as has been previously said, it is not
an aerobatic airplane, so why put an aerobatic powerplant in it. My Cessna
182 (painted, no less), flies very scale-like with a simple, non-pumped, OS
.91 Surpass. It weighs 13.5lbs. It won't leap off the ground, and no, it
won't do a loop without diving for airspeed, but how many full-scale
Cessna's can? If you want a scale airplane, build it and fly it like a scale
airplane. Just my opinion of course. I have other planes for aerobatics.

In addition, you'll definitely want to build the wing with flaps. I built my
first Cessna without it and regretted it. I purchased a second wing kit and
added the flaps. What a pleasurable experience. A little more building, but
when you put this much time into a model, a little more won't hurt.

I'll be happy to answer any specifics about the construction, if you like.

John

Learjet35x <learj...@aol.comno-spam> wrote in message
news:19991222165447...@ng-cm1.aol.com...

kir...@zagnut.rochester.rr.com

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Dec 23, 1999, 3:00:00 AM12/23/99
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Ayesha Abdullah <a...@dellnet.com> wrote:
> I am planning to build a 81" span Top Flight Cessna 182 which require a .91
> to 1.2 4 Stroke Engine or a .6 to .9 2 stroke.

> For the 4 stroke engines, there are so many Choices, Saito FA-91S, OS
> FS-91SII, Magnum 0.91RFS.
> Does anybody have any suggestions on which is the best engine?
> The Magnum brand is much cheaper than the other two. Is it of comparable
> quality ?

Remember that you get what you pay for.
The Magnum isn't as powerful as the other two, but many people like the
for the value. Horsepower per dollar, it's hard to beat. From readin this
group for a while, and experience, I'd rate the Magnum "very good", the
Saito "excellent" and the OS "stellar." You did not mention the YS91
engines, which are off the top of my scale :)

> There are some posts on the web on liner peeling problems with OS. Is Saito
> better?

The liner peeling problem only occurrs on the FX series 2-strokes. Even
then it happens almost exclusively to the 46FX series. The FS-91 is
a ringed engine, like most other 4-strokers.

> Since I am new to the hobby, I do not know if I should go with a 2 stroke
> or a 4 stroke. What are the pros and cons and what are the suggestions?

Stroke selection is a matter of personal preference and the application
in which the engine will be installed. 2-strokes work better in speed
applications, or for carefree sport flying. 4-strokes have more torque
and tend to show up in the noses of aerobatic airplanes or scale models
where a larger, slower-turning prop looks more scale. 4-strokes sound
neat too.

If you're completely new to the hobby, might I suggest that this not be
the first plane you fly, even if it is the first you build. Get an ARF
trainer setup and master it first. No self-respecting instructor will
teach you to fly with a beautifully finished Cessna scale model. I think
they'd cry more than you would if it crashed :)

JS

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Dec 28, 1999, 3:00:00 AM12/28/99
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The OS FS cannot peel because there is nothing in to peel.
The liner is not coated

Jens

On Wed, 22 Dec 1999 13:16:22 GMT, Ivo <luvb...@my-deja.com> wrote:

>There have been no liner peeling problems that I'm aware of with OS
>FOUR-stroke engines. For a plane that size, I'd go with either the OS

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