Glow Engines Discuss RC glow engines

OS FS40

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Old 09-24-2012, 06:19 PM
  #1
whoopee
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Default OS FS40

Is the OS FS40S really discontinued because that is hard to believe they been making a FS40 since around 1981 and now cant get them. Dont make sense
The fs40 is like their trade mark engine in my opinion.

Well sorry for the rant

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Old 09-25-2012, 03:02 PM
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Default RE: OS FS40

Try a Saito FA40, mine is awesome.
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Old 09-25-2012, 03:51 PM
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Default RE: OS FS40

G'day

I agree about the Saito 40a. I have two of them and they are great little engines. Light, powerful and reliable.

I have had some OS four strokes as well including the FS 40 Surpass but it was one engine which did not inspire me so I sold it. My 48 was much better and I still have a 52. More recently I bought an OS 62V which is a very impressive engine. But then again, I have three Saito 62 engines and like them even more.

My oldest OS is a 40FS. One of the really early ones. It is a very pleasant engine to use but makes very little power. It is best in large light floaty planes.

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Old 09-25-2012, 04:32 PM
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Default RE: OS FS40

My OS26 is a nice little engine but wants a lot of nitro to be reliable.
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Old 09-28-2012, 03:51 AM
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Default RE: OS FS40

My OS FS-20 ran perfectly on 5% nitro fuel and an OS Type F glow plug. I can see where using other brands of glow plugs could push the nitro requirement up some.


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Old 09-28-2012, 04:48 AM
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Default RE: OS FS40

G'day

I had two OS FS26 Surpass engines. The first was my first four stroke and I found it totally reliable on 10% nitro and a 10 x 4 prop with an F plug. I had it in a Dynaflite Butterfly which it suited perfectly.

I eventually sold the plane and the engine but about 10 years later I bought the engine back and it was still as good as ever.

The second one I bought NIB on a certain auction site. It had not been run. I ran it in but it was never quite as good as the first one. I suspect it simply needed more running. It was quite reliable though.

Later I had a Surpass 30 but I sold it to fund a Saito 30 which I still have. It is in my latest Butterfly but it really is a little too powerful for the Butterfly at full power. Great little engine.

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Old 09-28-2012, 11:20 AM
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Default RE: OS FS40

I have quite a few Saito engines in addition to OS, Enya, YS, Magnum, Thunder Tiger, etc. The point being that I'm not a fellow that has had only one small four-stroke as his only experience. I really loved the OS FS-20. Why I sold it I'll never know. I have two NIB OS FS-40 engines, which I'm told run similarly to the FS-20. If so, what a treat to look forward to. I forget why I didn't end up with a Saito FA-30 and 40. I "think" they stopped importing them into the US for a while. Anyone?


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Old 09-28-2012, 03:57 PM
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Default RE: OS FS40

Not sure why my 26 prefers the high nitro to be reliable, could be that it isnt broke in yet, or Iam just getting lazy in my old age. Anyway Ican get the 30% pretty cheap now so it was an easy fix. Oh and I use the finest plugs money can buy.
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Old 09-28-2012, 04:29 PM
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Default RE: OS FS40

But you didn't say that you were using OS Type F plugs. That is the finest plug that money can buy for an OS four-stroke engine.


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Old 09-28-2012, 04:31 PM
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Default RE: OS FS40

Maybe
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Old 10-02-2012, 06:00 PM
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Default RE: OS FS40

Jeffie is partiial to Merlin 4 stroke plugs. I have used them. They are very nice plugs.
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Old 10-02-2012, 08:01 PM
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Default RE: OS FS40

Guilty (in a high pitched falsetto voice).

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