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Gearbox "window"

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richard.goode(at)russiana
Guest

Posted: Tue Oct 04, 2011 7:30 am Post subject: Gearbox "window"

To set the record straight:  

   

<![if !supportLists]>Ø  <![endif]>The idea of the “window” was not to be able to inspect the gearbox in use, but was developed by Sergio Dallan in Italy as part of his oil shut-off system.   

<![if !supportLists]>Ø  <![endif]>So there was a valve on the oil supply preventing oil coming down to the engine, controlled through a small door in the cowling, with a safety back-up in the form of a “barbers pole” and a light in the cockpit.    

<![if !supportLists]>Ø  <![endif]>Then, in order to stop any oil that might be in the crank shaft draining down to the cylinders, there was a white mark in the gearbox, visible through the “window” and when the mark lined up, then the crank shaft was in its highest position, and so oil would not drain down into it and then into the cylinders.    

<![if !supportLists]>Ø  <![endif]>Sergio made a few, and indeed we fitted them to several Sukhois.   Generally worked well.     

<![if !supportLists]>Ø  <![endif]>As I recollect it was simply a thick Perspex disc, with a metal reinforcement around the rim, using the same three bolt holes as the existing metal cover.   

<![if !supportLists]>Ø  <![endif]>In passing the existence of the cover is an easy way to identify a Series 2 engine.   

   

Richard Goode   

Richard Goode Aerobatics  

Rhodds Farm  

Lyonshall  

Herefordshire  

HR5 3LW  

United Kingdom  

   

Tel:  +44 (0) 1544 340120  

Fax: +44 (0) 1544 340129  

www.russianaeros.com  

   

       [quote][b]

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dsavarese0812(at)bellsout
Guest

Posted: Tue Oct 04, 2011 7:51 am Post subject: Gearbox "window"

Thanks for clearing things up Richard.

Dennis



A. Dennis Savarese

334-285-6263

334-546-8182 (cell)

Skype: Yakguy1

www.yak-52.com

On 10/4/2011 10:26 AM, Richard Goode wrote:

 	  Quote: 	
		  

 To set the record straight:



 ØThe idea of the “window” was not to be able to inspect the gearbox in 

 use, but was developed by Sergio Dallan in Italy as part of his oil 

 shut-off system.



 ØSo there was a valve on the oil supply preventing oil coming down to 

 the engine, controlled through a small door in the cowling, with a 

 safety back-up in the form of a “barbers pole” and a light in the 

 cockpit.



 ØThen, in order to stop any oil that might be in the crank shaft 

 draining down to the cylinders, there was a white mark in the gearbox, 

 visible through the “window” and when the mark lined up, then the 

 crank shaft was in its highest position, and so oil would not drain 

 down into it and then into the cylinders.



 ØSergio made a few, and indeed we fitted them to several Sukhois. 

 Generally worked well.



 ØAs I recollect it was simply a thick Perspex disc, with a metal 

 reinforcement around the rim, using the same three bolt holes as the 

 existing metal cover.



 ØIn passing the existence of the cover is an easy way to identify a 

 Series 2 engine.



 Richard Goode



 Richard Goode Aerobatics



 Rhodds Farm



 Lyonshall



 Herefordshire



 HR5 3LW



 United Kingdom



 Tel: +44 (0) 1544 340120



 Fax: +44 (0) 1544 340129



 www.russianaeros.com <http://www.russianaeros.com>



 *

 *

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