RE: OS 200

RE: OS 200
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RE: OS 200 - 7/31/2007 6:39:19 PM

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From: Schoonhoven, NETHERLANDS
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Today bench run 10% nitro
APC 16*12 7900
APC 16*13 7700
Engel 18*11 7500 (Engel 18*11 is a narrow bladed carbon prop)

Conclusion for now. Not such a great engine.
My laser 200 V-twin did on the same day with the same fuel on these props 200rpm more.

(in reply to alfredbmor)

RE: OS 200 - 7/31/2007 6:42:04 PM

Rate1

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Hans,

What is the weight and price of the Laser 200 V-twin?

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RE: OS 200 - 7/31/2007 6:47:52 PM

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quote:

ORIGINAL: Rate1
What is the weight and price of the Laser 200 V-twin?

460 pounds and 1230gr mufflers included.

(in reply to Rate1)

RE: OS 200 - 7/31/2007 6:59:57 PM

Rate1

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that is about US$950... Then I rather go for the OS 200FI instead...

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RE: OS 200 - 7/31/2007 7:19:52 PM

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quote:

ORIGINAL: Rate1
that is about US$950... Then I rather go for the OS 200FI instead...

Sorry, but that is not the point. It is not that the laser is a better buy.
I only expected a single to do better (power-wise) then a v-twin with the same displacement.
It did not, and that is my disappointment. I hoped this engine would be a inexpensive alternative for a engien in a pattern ship, but it is not up to that task.

(in reply to Rate1)

RE: OS 200 - 7/31/2007 7:25:24 PM

Rate1

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Hans,

Myself are looking for an engine to my 25% Extra, flying weight guestimate 11 lbs. It's Laniers old full build kit so it is not a 3D plane. However I have made several weight reduction steps and are looking for an engine that is low on nitro (expensive in Europe as you know) and will give it rocket performance.
You have this all new engine at hands, do you think it is a good choise for my application, or do you recomend me to go for YS 160/170 instead?

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RE: OS 200 - 7/31/2007 7:30:47 PM

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Sorry hit the wrong key. And now the door-bell rings. Be back soon

This one I expect.
http://www.lanierrc.com/lrcprivate/rcairplanes/extra25percent.htm

Rocket & low on nitro & low weight to keep it flying well. I think the saito180 and this OS200 are still the best options.
YS will be more rocket like, but if this will be your more ten ten fligths per weekend ship the fuel costs will be not what you like.

< Message edited by Hans Meij -- 7/31/2007 8:54:30 PM >

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RE: OS 200 - 7/31/2007 10:11:43 PM

blw

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Or maybe the Saito 2.20. It will probably run fine on 5% fuel like the other Saitos.

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RE: OS 200 - 7/31/2007 10:57:25 PM

Rate1

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Thanks for the advice.
Yes that is the kit I am building.
High nitro fuel is both a hustle as I would need to mix it myself as well as it is expensive in Europe. This is the reason why I am hoping for good reviews on the OS 200. Obviously the OS200FI would be great but I will never pay that price.
The Saito 220 is too heavy. I am trying to keep the wing load light.

< Message edited by Rate1 -- 7/31/2007 11:00:01 PM >

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RE: OS 200 - 8/1/2007 1:36:06 PM

RadarController

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i'm in the same boat as you. about 11 pound plane. like the sound/torque of a four. wieghs 1.5lbs less then the gas. more torque then the 1.60. but not near the hp as a gas. its just that weight. with the glow i can put redundancy stuff in my plane and not worry about weight. wouldn't be talking about this if i would have got the yak. wing loading is rated a lot higher. so i'm in a dilema.

(in reply to Rate1)

RE: OS 200 - 8/1/2007 2:02:44 PM

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Saito220, 180 or OS200 should all give excellent performance for that size and weight but must be used with the correct prop size.

They dont like to be loaded down to 7500rpm at peak like a 50cc gasser. At +8500rpm and they should pull these planes like rockets.

These are the props I would use for good performance with that size fourstroke glow engines 17x8, 18x6, 18x8 or 19x8 for the 220.

(in reply to RadarController)

RE: OS 200 - 8/2/2007 2:03:55 PM

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Hans,

How does the OS160FX compare on those APC props you ran? I am only familiar with APC 18X6W and 18X8W rpm values. I am looking to get an idea of the power comparision between those two engines.

There was a website dedicated to pattern engine setups, props, pipes, and rpm data but I have either lost the website or it has been deleted.

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RE: OS 200 - 8/2/2007 2:56:20 PM

RadarController

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from what i've read.. they're very close. however.. i would think the two stroke needs to spool up to get the horsepower. midrange power might suffer briefly. the four stroke can throw larger props. the tachs taken on the 200 show that it can throw an 18x8 at the same rpm as what the 1.60 thows a 16x8. the tachs also show... if you throw a 16x8 on the 200.. it gets up close to 9000rpm. 8400's with an 18x8. 1.60 plus a pitts costs 330. and weighs 32.8 without muffler. probably about 35.8ish with. the 200 weighs 30.7 with stock muffler. which seems to be very manipulative. and you get four stroke sound.. ease of use after break in. usually no needle valve adjustments etc. i'm leaning towards the 200 if i don't go with a gas.

< Message edited by RadarController -- 8/2/2007 3:25:29 PM >

(in reply to PlaneKrazee)

RE: OS 200 - 8/2/2007 5:09:20 PM

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quote:

Hans, How does the OS160FX compare on those APC props you ran?

I have a well piped (KS1025) 160FX on a pattern ship too. The two stroke does about the same as the laser on the ground, but can handle a bigger (in this case a 17*12 APC) better than the laser can. The laser does a bit better in rpm with the 16 inch APC's.

In horizontal flight the 160FX speeds up very wel and there I like the characteristics of the piped 2 stroke better. The dynamics of the plane look better. However if the climb rate is more than 45 degrees the Laser is performing better because there is never a rpm change up or down. Downlines with a 4 stroke are a lot better because of the breaking.

The OS200 I only tried it bench running. To me the power was disappointing however it only has seen two tanks of fuel. A well piped FX160 will do better then the OS200. A muffled FX160 will not do better then the OS200

< Message edited by Hans Meij -- 8/2/2007 5:11:23 PM >

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RE: OS 200 - 8/2/2007 5:53:26 PM

RadarController

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if i used the 160 i would be using a pitts. i want hover and pull out performance. what's your thoughts.

(in reply to Hans Meij)

RE: OS 200 - 8/3/2007 3:30:09 PM

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Hans,

Thank you for the reply. It sounds like the 200 is a winner if it can spin a 18X6W or 18X8W at a higher rpm than the 160FX especially considering the weight reduction compared to the much heavier Saito 2.20.

I'm still very interested in the fuel consumption of the 200 compared to the 160FX, one of the most fuel effecient engines I have ever used.

If the 200 can spin a APC 17X8W @ 9200 rpm on 5% nitro and run for 5 minutes 20 seconds it will be on par.

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(in reply to RadarController)

RE: OS 200 - 8/14/2007 1:56:16 AM