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OS 200 - 7/2/2007 10:51:01 PM   
flatspin1b


 

Posts: 23
Joined: 10/24/2005
From: Kenosha, WI, USA
Status: offline 		Just wondering if anyone has any "on-hand" experience with the new OS 200 Surpass......not the FI version?
       Post #: 1

RE: OS 200 - 7/3/2007 4:17:53 PM   
w8ye



Posts: 17021
Joined: 12/11/2001
From: Taylortown, OH, USA
Status: offline 		According to Model Airplane News it looks like a APC 18-8 is the sweet spot?

Top Flite 16 X 8 ----8700
APC 16 X 8 --------9000
17 X 8 ------------8600
17 X 8N -----------8000
Top Flite 18 X 6 ---8100
18 X 8 ------------7900
APC 18 X 8 --------8400
Zinger 18 X 8-14 --7000
Top Flite 20 X 8 ---6400

Apparently 9,000 static rpm is considered too fast for this engine?

< Message edited by w8ye -- 7/3/2007 4:21:55 PM >

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Original AMA #31261

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       Post #: 2

RE: OS 200 - 7/3/2007 6:41:09 PM   
rainedave



Posts: 4710
Joined: 7/21/2005
From: Greensboro, NC, USA
Status: online 		I read in the RCU Pattern forum last year that Jason Shulman was given one to test. He posted some photos of the one he received, but I don't remember the follow-up posts. This was way back last year sometime. You could try to search the Pattern forum, I guess, and see what he thought of it.

David

edited to add link (post #8)

http://www.rcuniverse.com/forum/m_5004679/anchors_5004679/mpage_1/key_os200/anchor/tm.htm#5004679

< Message edited by rainedave -- 7/3/2007 6:48:09 PM >

(in reply to w8ye)
       Post #: 3

RE: OS 200 - 7/3/2007 11:18:54 PM   
Don M.



Posts: 1724
Joined: 3/2/2004
From: Halifax, NS, CANADA
Status: offline 		The power figures I'm seeing seem very poor for an engine of this size. My old tired YS 140FZ will match those #'s .

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       Post #: 4

RE: OS 200 - 7/3/2007 11:40:02 PM   
Hobbsy



Posts: 10408
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		Don, I read a test of this engine on another site, my Saito 1.50 has more power than the 2.00 tested there has. I think that other test was bogus. I like my 1.50 but there's no way it should be stronger than anybodies 2.00.

_____________________________

Giant Saito, 73.2 Cu. In., 70.5HP @ 5,800 rpm, 79 ft. lbs torque @ 3,500 rpm, 57 mpg, 3.50 bore, 3.81 stroke. 563 lbs.

(in reply to Don M.)
       Post #: 5

RE: OS 200 - 7/3/2007 11:56:21 PM   
bigedmustafa



Posts: 2317
Joined: 6/19/2005
From: Omaha, NE, USA
Status: offline 		How long would a ringed engine of this size likely need to run before really breaking in and producing nearly all of its potential horsepower?

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       Post #: 6

RE: OS 200 - 7/4/2007 12:09:03 AM   
w8ye



Posts: 17021
Joined: 12/11/2001
From: Taylortown, OH, USA
Status: offline 		The HP peak is at 9,000.

The torque peak is probably more likely below 7,000?

It would unlikely be very good above 9000?

It should be propped with a 20 X 8 to 18 X 8 ?

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Attended the CutFinger Institute of DirtNap University for years but never did graduate....

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Original AMA #31261

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       Post #: 7

RE: OS 200 - 7/4/2007 12:28:46 AM   
ajcoholic



Posts: 4023
Joined: 6/22/2002
From: Kirkland Lake, ON, CANADA
Status: offline
quote:

ORIGINAL: Hobbsy

Don, I read a test of this engine on another site, my Saito 1.50 has more power than the 2.00 tested there has. I think that other test was bogus. I like my 1.50 but there's no way it should be stronger than anybodies 2.00.


Hey Hobbsy,
I have recently bench run my OS 200, and it is awaiting some better weather for test flying in my big Stinger. I normally dont like to say much here for various reasons, but I cant keep quiet on this one....

I will say this - the OS 200 I ran, on the same props (18, 20, 22" in various pitches) and fuels (10, 15 and 30% nitro, 18% oil), just under or equal to my Saito 2.20. And, it is 3/4 pound lighter. The Saito 2.20 is a sweet engine. I have no bias to any brand, but I generally prefer Saito's for my own planes. But the 200 from OS has to be, in my honest opinion one of the nicest running engines I have EVER ran. Very, very smooth, easy handling and powerful. A real gem in every respect and the build quality leaves nothing to be desired. My full review will be out soon in the mag - thats all I can say for now.

Thats my story and I'm sticking to it!

AJC



_____________________________

Andrew J. Coholic
Engine reviewer for FLY RC Magazine - andrewc@flyrc.com

(in reply to Hobbsy)
       Post #: 8

RE: OS 200 - 7/4/2007 1:34:11 AM   
Don M.



Posts: 1724
Joined: 3/2/2004
From: Halifax, NS, CANADA
Status: offline 		Andrew, what mag is that ? I would like to see some more #'s. I actually had my heart set on this engine but first impressions are not that inviting.

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       Post #: 9

RE: OS 200 - 7/4/2007 2:09:53 AM   
PlaneKrazee



Posts: 3515
Joined: 5/15/2002
From: Westerly, RI, USA
Status: online 		Smooth running and 12 oz lighter? That sounds like a winner if it can make power on 5% nitro.

w8ye,

what % nitro were those figures run on and do you know if that was the APC 18X8W or regular N? That makes a huge difference. If it is the wide 18X8 that is excellent considering you don't need a two stroke size muffler.

Is this engine available now?

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       Post #: 10

RE: OS 200 - 7/4/2007 2:38:15 AM   
w8ye



Posts: 17021
Joined: 12/11/2001
From: Taylortown, OH, USA
Status: offline 		The MAN test was done with 20% nitro
18 X 8W

< Message edited by w8ye -- 7/4/2007 2:40:15 AM >

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Attended the CutFinger Institute of DirtNap University for years but never did graduate....

Club Saito Member #7
Original AMA #31261

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       Post #: 11

RE: OS 200 - 7/4/2007 3:40:01 AM   
Hobbsy



Posts: 10408
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		That's good news AJ, that other test is on a site we ain't allowed to mention here.

_____________________________

Giant Saito, 73.2 Cu. In., 70.5HP @ 5,800 rpm, 79 ft. lbs torque @ 3,500 rpm, 57 mpg, 3.50 bore, 3.81 stroke. 563 lbs.

(in reply to ajcoholic)
       Post #: 12

RE: OS 200 - 7/4/2007 6:32:22 AM   
PlaneKrazee



Posts: 3515
Joined: 5/15/2002
From: Westerly, RI, USA
Status: online 		That's a good rpm for the 18X8W blade. I wonder how it would do on 5% with that prop. If it still got 8100 I think it would be good.

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       Post #: 13

RE: OS 200 - 7/5/2007 3:47:12 PM   
Hobbsy



Posts: 10408
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		AJ, since I have a Saito 2.20, this became my next two engines. My good friend Bobby is going to get an OS 2.00 soon. A Martin D3R

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< Message edited by Hobbsy -- 7/5/2007 3:48:16 PM >

_____________________________

Giant Saito, 73.2 Cu. In., 70.5HP @ 5,800 rpm, 79 ft. lbs torque @ 3,500 rpm, 57 mpg, 3.50 bore, 3.81 stroke. 563 lbs.

(in reply to ajcoholic)
       Post #: 14

RE: OS 200 - 7/5/2007 5:33:15 PM   
Ken6PPC


 

Posts: 622
Joined: 6/20/2006
From: Hamilton, OH, USA
Status: offline
quote:

ORIGINAL: Hobbsy

AJ, since I have a Saito 2.20, this became my next two engines. My good friend Bobby is going to get an OS 2.00 soon. A Martin D3R

Hobbsy, what % nitro do you run in that?

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       Post #: 15

RE: OS 200 - 7/5/2007 6:41:56 PM   
Hobbsy



Posts: 10408
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		Ken, its been known to run on a little New York Port, no castor.

_____________________________

Giant Saito, 73.2 Cu. In., 70.5HP @ 5,800 rpm, 79 ft. lbs torque @ 3,500 rpm, 57 mpg, 3.50 bore, 3.81 stroke. 563 lbs.

(in reply to Ken6PPC)