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oil pressure switch for engine hour meter

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Rowland_Carson

Joined: 04 Jul 2008
Posts: 155
Location: Cheltenham, England

Posted: Thu Jan 14, 2010 10:50 am Post subject: oil pressure switch for engine hour meter

Has anyone in UK fitted an oil-pressure switch to control when an 

engine hours meter runs? If so, where did you get it?



A discussion with Skydrive indicates that the obvious place to mount 

it is in place of part number 641733, the 10mm x 1mm plug screw which 

covers the port on the oil pump that would feed a hydraulic governor. 

However, Skydrive are not sure that it will be easy to find an oil 

pressure switch with that thread.



I have spotted one on an Australian supplier's website but can't find 

anything similar in UK.



It's also important to note that what I want is a "normally-open" 

switch - that is the opposite of the usual type which is 

"normally-closed" and opens with increasing pressure to extinguish 

the oil-pressure warning light.



I'd like to avoid the need to turn up an adaptor for a BSP or NPT 

thread switch.



regards



Rowland

-- 

| Rowland Carson          ... that's Rowland with a 'w' ...

| <rowil(at)clara.net>            http://home.clara.net/rowil/

| Skype, Twitter: rowland_carson      Facebook: Rowland Carson

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Ivor Phillips

Joined: 16 Jan 2006
Posts: 253
Location: London UK

Posted: Thu Jan 14, 2010 12:37 pm Post subject: oil pressure switch for engine hour meter

Hi Rowland

If you are fitting a constant speed propeller then using Mark Burton's constant speed controller will give you total engine time,

Or alternately if you have a vacuum system fitted a simple vac switch will work, also there is a two terminal VDO unit http://www.coolairvw.co.uk/ca/mia/d/vdo+oil+pressure+gauge+sender+twin+terminal/pid/6554640?afid=88888

that would work for you,



Ivor

 	  Quote: 	
		   Has anyone in UK fitted an oil-pressure switch to control when an 

 engine hours meter runs? If so, where did you get it?

 

 A discussion with Skydrive indicates that the obvious place to mount 

 it is in place of part number 641733, the 10mm x 1mm plug screw which 

 covers the port on the oil pump that would feed a hydraulic governor. 

 However, Skydrive are not sure that it will be easy to find an oil 

 pressure switch with that thread.

 

 I have spotted one on an Australian supplier's website but can't find 

 anything similar in UK.

 

 It's also important to note that what I want is a "normally-open" 

 switch - that is the opposite of the usual type which is 

 "normally-closed" and opens with increasing pressure to extinguish 

 the oil-pressure warning light.

 

 I'd like to avoid the need to turn up an adaptor for a BSP or NPT 

 thread switch.

 

 regards

 

 Rowland

 -- 

 | Rowland Carson          ... that's Rowland with a 'w' ...

 | <rowil(at)clara.net>            http://home.clara.net/rowil/

 | Skype, Twitter: rowland_carson      Facebook: Rowland Carson

 | pictures: http://picasaweb.google.com/rowlandcarson

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Roger.Mills(at)btinternet
Guest

Posted: Fri Jan 15, 2010 1:24 am Post subject: oil pressure switch for engine hour meter

Rowland

An alternative idea is to use a fuel pressure switch (Bosch do a  

suitable part). It fits in your fuel line easily and also provides  

warning of fuel pressure problems - something you need unless you've  

already installed a guage!

Roger Mills

Europa 141

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riddon(at)sent.com
Guest

Posted: Fri Jan 15, 2010 1:56 am Post subject: oil pressure switch for engine hour meter

Rowand,



I used a Sunpro digital hours meter, wired so that it only starts counting

when the alternator is switched on. Has worked well for the last 6 years.

Can't remember where I bought it but I think it was a marine store.



Richard Iddon G-RIXS

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mp.gamble(at)tiscali.co.u
Guest

Posted: Fri Jan 15, 2010 9:43 am Post subject: oil pressure switch for engine hour meter

Roger, did you fit this pressure switch? If so please let me have part

number and method of attachment to fuel line.

Thanks

Mike Gamble

XS 440 912S

An alternative idea is to use a fuel pressure switch (Bosch do a  

suitable part). It fits in your fuel line easily and also provides  

warning of fuel pressure problems - something you need unless you've  

already installed a guage!

Roger Mills

Europa 141

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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hurstkr(at)redzone.com.au
Guest

Posted: Fri Jan 15, 2010 5:48 pm Post subject: oil pressure switch for engine hour meter

 	  Quote: 	
		  

 Has anyone in UK fitted an oil-pressure switch to control when an engine 

 hours meter runs? If so, where did you get it?




	


Rowland,



In the Europa Flyer Issue 62 Sept.2009 Page 7, Jonathan Milbank wrote an 

interesting article called "Logging Hours"



I cannot vouch for the accuracy of it, but it would appear you may waste 

good engine hours by recording every moment the engine is running.



According to his article, for the purpose of technical logs, engine and 

airframe hours are the elapsed times between applying full power for the 

purpose of taking off until after the landing roll is completed.



Just a bit of food for thought ?



Cheers

Kingsley

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Rowland_Carson

Joined: 04 Jul 2008
Posts: 155
Location: Cheltenham, England

Posted: Mon Jan 18, 2010 12:27 pm Post subject: oil pressure switch for engine hour meter

At 2010-01-15 09:17 +0000 Roger Mills wrote:



 	  Quote: 	
		  An alternative idea is to use a fuel pressure switch (Bosch do a 

suitable part). It fits in your fuel line easily and also provides 

warning of fuel pressure problems - something you need unless you've 

already installed a guage


	


Roger - thanks for the thought. I do have a fuel pressure sensor & 

gauge in the pile of panel goodies, but am a bit away from installing 

it yet.



regards



Rowland

-- 

| Rowland Carson          ... that's Rowland with a 'w' ...

| <rowil(at)clara.net>            http://home.clara.net/rowil/

| Skype, Twitter: rowland_carson      Facebook: Rowland Carson

| pictures: http://picasaweb.google.com/rowlandcarson

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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