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All Forums >> RC Airplanes >> Kit Building >> Kit Manufacturer Direct Support Forum >> Great Planes, TopFlite, Duraplane, US Aircore >> Header TOPQ7925/6
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Header TOPQ7925/6 - 2/21/2012 2:55 PM   
edbu1


 

Posts: 87
Score: 100
Joined: 2/5/2007
Last Login: 5/20/2013
From: Sanford, FL, USA
Status: offline 		Bax: I've been told that this item is no longer available. Is this correct? I also understand that the TOPQ7925 and TOPQ7926 will both work for the G series Suepertigre 75. Is this correct? If discontinued, any replacment headers available?

Ed

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RE: Header TOPQ7925/6 - 2/22/2012 3:27 PM   
Bax


 

Posts: 17291
Score: 169
Joined: 4/26/2002
Last Login: 5/20/2013
From: Champaign, IL, USA
Status: offline 		They're different sizes and won't work for both engines. The O.S. is 43.8 mm between the mounting holes and the ST is 47 mm between the mounting holes.

_____________________________

Bill Baxter, Manager Hobby Services/Futaba Service/North America
3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
Service Phone: 217 398-0007
Email: hobbyservices@hobbico.com

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RE: Header TOPQ7925/6 - 2/22/2012 3:31 PM   
edbu1


 

Posts: 87
Score: 100
Joined: 2/5/2007
Last Login: 5/20/2013
From: Sanford, FL, USA
Status: offline 		Bax: My understanding is that TOPQ 7925 and 7926 are both for Supertigre engines. The 7920 is for OS engines. I have a ST G-75 engine.
Are the 7925 and 7926 both discontinued with no replacment by Top Flite?

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RE: Header TOPQ7925/6 - 2/23/2012 12:53 PM   
edbu1


 

Posts: 87
Score: 100
Joined: 2/5/2007
Last Login: 5/20/2013
From: Sanford, FL, USA
Status: offline 		With further investigation, it appears that the 7925 header is made for the S series of Supertigre engines, which means that the mounting bolts pass through the header and screw into the engine crankcase. The 7926 header is made for the G series of Supertigre engines, which means that the mounting bolts pass through the engine crankcase and screw into the header. I believe that both have the same, proper dimension from mounting bolt to mounting bolt. So I should be able to use the 7925 on my G series of Supertigre engine. Using the 7925 on the G series will require longer bolts that will pass through the header and be held on with locknuts.

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RE: Header TOPQ7925/6 - 2/23/2012 3:43 PM   
Bax


 

Posts: 17291
Score: 169
Joined: 4/26/2002
Last Login: 5/20/2013
From: Champaign, IL, USA
Status: offline 		I made a bad lookup. I compared the OS header to the ST header. Please note that the ST headers are discontinued and no longer available.

_____________________________

Bill Baxter, Manager Hobby Services/Futaba Service/North America
3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
Service Phone: 217 398-0007
Email: hobbyservices@hobbico.com

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       Post #: 5

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