OS 40 Surpass C 17400rpm  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Tachometer Readings >> OS 40 Surpass C 17400rpm
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OS 40 Surpass C 17400rpm - 7/26/2003 10:21:38 PM   
futaba1024


 

Posts: 155
Joined: 1/21/2003
From: staffordshire, UNITED KINGDOM
Status: offline 		HI.
This one is a bit of a laugh! Os 40 Surpass C 10% nitro 16% syn oil.
Graupner 8x6 16000

Master 8x4 17400.

< Message edited by futaba1024 -- Jul 30 2003 7:17PM >
       Post #: 1

OS 40 Surpass C 17400rpm - 8/8/2003 2:47:04 PM   
dany_maia



Posts: 318
Joined: 8/22/2002
From: Porto, PORTUGAL
Status: offline 		Hi.
Are you trying to damage your engine?

(in reply to futaba1024)
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OS 40 Surpass C 17400rpm - 8/8/2003 5:25:12 PM   
sandal


 

Posts: 398
Joined: 12/9/2002
From: Dokka, NORWAY
Status: offline 		dany_maia;
the FS-C engines are designed for high rpm use. 17.000 is no problem.

(in reply to futaba1024)
       Post #: 3

OS 40 Surpass C 17400rpm - 8/8/2003 5:52:08 PM   
dany_maia



Posts: 318
Joined: 8/22/2002
From: Porto, PORTUGAL
Status: offline 		OK.
Sorry, I didnīt know.

Daniel Maia

(in reply to futaba1024)
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OS 40 Surpass C 17400rpm - 8/8/2003 8:21:38 PM   
futaba1024


 

Posts: 155
Joined: 1/21/2003
From: staffordshire, UNITED KINGDOM
Status: offline 		In actual fact the 40fs-c is rated at .9hp@17500rpm, max rpm 21000.
cheers

(in reply to futaba1024)
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OS 40 Surpass C 17400rpm - 8/9/2003 1:48:23 AM   
sandal


 

Posts: 398
Joined: 12/9/2002
From: Dokka, NORWAY
Status: offline 		I'd LOVE to hear one of those engines, the sound must be fantastic. I have a .30 and a .52 four stroke airplane engine, and thinking about what they would sound like at almost twice the rpm...

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OS 40 Surpass C 17400rpm - 8/9/2003 1:50:05 PM   
futaba1024


 

Posts: 155
Joined: 1/21/2003
From: staffordshire, UNITED KINGDOM
Status: offline 		Sandal.
At those sort of rpm, it sounds a bit like a YS63 at full chat, as it happens we are running a YS63 silencer ! It fits a treat.
Cheers

(in reply to futaba1024)
       Post #: 7

OS 40 Surpass C 17400rpm - 8/9/2003 2:07:14 PM   
sandal


 

Posts: 398
Joined: 12/9/2002
From: Dokka, NORWAY
Status: offline 		*goosebumps*

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RE: OS 40 Surpass C 17400rpm - 10/30/2005 5:18:28 PM   
futaba1024


 

Posts: 155
Joined: 1/21/2003
From: staffordshire, UNITED KINGDOM
Status: offline 		Just dug this one out again, the motor has changed owner and we have done some more prop testing on 10% fuel.

15000rpm on an APC 10x3 with an idle of around 3000rpm and suberb transition, the new owner is very pleased!

(in reply to sandal)
       Post #: 9

RE: OS 40 Surpass C 17400rpm - 10/30/2005 9:50:36 PM   
Motorboy



Posts: 1715
Joined: 2/7/2004
From: Bergen, NORWAY
Status: offline
quote:

ORIGINAL: sandal

dany_maia;
the FS-C engines are designed for high rpm use. 17.000 is no problem.


C means car, also designed for modelcar...

10x3 15000 = 0.723 (better effect)

Graupner 8x6 16000 = 0.719 HP

Master 8x4 17400 = 0.617 HP

Jens Eirik

< Message edited by Motorboy -- 10/30/2005 9:57:33 PM >

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RE: OS 40 Surpass C 17400rpm - 11/9/2005 8:47:54 PM   
derferic


 

Posts: 59
Joined: 4/4/2003
From: San Diego, CA,
Status: offline 		Futaba1024,

Can you provide a picture of the engine? I have the aero version but the 'C' model is obviously different.

Can someone say what is different internally to allow such high RPMs?

(in reply to Motorboy)
       Post #: 11

RE: OS 40 Surpass C 17400rpm - 11/10/2005 6:48:05 PM   
More HP



Posts: 241
Joined: 11/8/2002
From: Bandon, OR, USA
Status: offline 		Really stiff valve springs, larger exhaust port and different cam profile. The straight intake manifold helps too, rather than the 90 degree updraft airplane type.

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(in reply to derferic)
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RE: OS 40 Surpass C 17400rpm - 11/12/2005 5:33:57 PM   
futaba1024


 

Posts: 155
Joined: 1/21/2003
From: staffordshire, UNITED KINGDOM
Status: offline 		got it wrong.

< Message edited by futaba1024 -- 11/12/2005 5:37:11 PM >

(in reply to More HP)
       Post #: 13

RE: OS 40 Surpass C 17400rpm - 11/12/2005 5:38:31 PM   
futaba1024


 

Posts: 155
Joined: 1/21/2003
From: staffordshire, UNITED KINGDOM
Status: offline 		The 40c also has OS52 valves, here is a photo of the CX which has the recoil starter, the model we used was the C, same motor but with standard backplat



Cheers


Attachments
Click to see fullsize image.
Click for fullsize


< Message edited by futaba1024 -- 11/12/2005 5:39:21 PM >

(in reply to futaba1024)
       Post #: 14

RE: OS 40 Surpass C 17400rpm - 2/8/2008 6:52:41 PM   
futaba1024


 

Posts: 155
Joined: 1/21/2003
From: staffordshire, UNITED KINGDOM
Status: offline 		Had originally built this motor fro a pal of mine, by swapping out the car crankshaft for the aircraft type with prop driver.

Subsiquently it has had one more owner and a twin needle carb fitted, have just bought it back from the last owner, still in mint condition!

Think they are out of production now.......... May be worth quite a bit on Ebay or I could find a plane for it.

Cheers

(in reply to futaba1024)
       Post #: 15

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