UK Stationary Engine Forum
 

Go Back   UK Stationary Engine Forum > Main Engine Section > Engine-Only Stuff > Ignition Systems

Reply
 
Thread Tools Display Modes
Old 06-12-17, 11:44 AM   #1
Dan_pt
Forum Supporter 2011
 
Dan_pt's Avatar
 
Join Date: Nov 2009
Location: wickford
Posts: 2,904
Default Ruston 6 AP Timing.

Hi, can someone advise me of the correct timing for the spark on a 6 AP with a BTH magneto. (How many inches BTDC on the flywheel?)

Many thanks Dan.
Dan_pt is offline   Reply With Quote
Old 06-12-17, 11:59 AM   #2
listerdiesel
Admin Team
Forum Supporter
 
listerdiesel's Avatar
 
Join Date: Feb 2008
Posts: 15,838
Default

Timing marks on the magneto gears and on the sideshaft gears, Dan.

Peter
listerdiesel is offline   Reply With Quote
Old 06-12-17, 12:10 PM   #3
Dan_pt
Forum Supporter 2011
 
Dan_pt's Avatar
 
Join Date: Nov 2009
Location: wickford
Posts: 2,904
Default

Quote:
Originally Posted by listerdiesel View Post
Timing marks on the magneto gears and on the sideshaft gears, Dan.

Peter
Thanks Peter.they are in line but the gear can be fitted in any position on the mag shaft. It runs but is a little noisy from the exhaust suggesting it may be a bit retarded. I guess some experimentation is in order.

Dan
Dan_pt is offline   Reply With Quote
Old 06-12-17, 12:11 PM   #4
listerdiesel
Admin Team
Forum Supporter
 
listerdiesel's Avatar
 
Join Date: Feb 2008
Posts: 15,838
Default

If I can find the AP booklet on my desk, I'll see if there is any timing info.

Peter
listerdiesel is offline   Reply With Quote
Old 06-12-17, 12:16 PM   #5
listerdiesel
Admin Team
Forum Supporter
 
listerdiesel's Avatar
 
Join Date: Feb 2008
Posts: 15,838
Default

Found the AP 'Useful Information' booklet, nothing at all on magneto timing I'm afraid.

Looked through the other AP literature that Ray Hooley sent me, nothing there either.

Peter
listerdiesel is offline   Reply With Quote
Old 06-12-17, 12:21 PM   #6
Dan_pt
Forum Supporter 2011
 
Dan_pt's Avatar
 
Join Date: Nov 2009
Location: wickford
Posts: 2,904
Default

Thanks for looking Peter. I'll give it a couple of degrees extra and see how it goes.

Dan.
Dan_pt is offline   Reply With Quote
Old 06-12-17, 01:38 PM   #7
Paul_Sterling
Senior Member
 
Paul_Sterling's Avatar
 
Join Date: Sep 2007
Location: County Durham
Posts: 7,002
Default

Quote:
Originally Posted by Dan_pt View Post
Thanks for looking Peter. I'll give it a couple of degrees extra and see how it goes.

Dan.
A strobe light might work Dan.

Paul.
__________________
Paul Sterling A Stationary Engine Obsessionist
Locomotion 2017 29th, 30th July, PM for details
Paul_Sterling is offline   Reply With Quote
Old 06-12-17, 03:19 PM   #8
martinpaff
Admin Team
Forum Supporter
 
martinpaff's Avatar
 
Join Date: Mar 2007
Location: Lincoln, UK
Posts: 11,259
Default

I've tried it on a BPR Paul - it's hopeless. The magneto HT will trigger the strobe, and it can be powered from a seperate supply, but the strobes were all over the place. I suspect too low rpm, governing, and the vageries of the magneto all contributed.

The Wico EK Ruston AP has a small advantage, because you can vary the timing whilst running. It was interesting, and I discovered a very small change made a real audible difference to the exhaust note. I think it's worth continuing to play...

MP
martinpaff is offline   Reply With Quote
Old 06-12-17, 04:33 PM   #9
Paul_Sterling
Senior Member
 
Paul_Sterling's Avatar
 
Join Date: Sep 2007
Location: County Durham
Posts: 7,002
Default

Quote:
Originally Posted by martinpaff View Post
I've tried it on a BPR Paul - it's hopeless. The magneto HT will trigger the strobe, and it can be powered from a seperate supply, but the strobes were all over the place. I suspect too low rpm, governing, and the vageries of the magneto all contributed.

The Wico EK Ruston AP has a small advantage, because you can vary the timing whilst running. It was interesting, and I discovered a very small change made a real audible difference to the exhaust note. I think it's worth continuing to play...

MP
I suspected so Martin, the Strobe is aimed for a 1000rpm running speed.

Paul.
__________________
Paul Sterling A Stationary Engine Obsessionist
Locomotion 2017 29th, 30th July, PM for details
Paul_Sterling is offline   Reply With Quote
Old 06-12-17, 05:04 PM   #10
Appletop
Senior Member
 
Appletop's Avatar
 
Join Date: Aug 2008
Location: Just outside Diss
Posts: 8,348
Default

Probably 20 BTDC, Or maybe 18

Not that it's the same but I can measure the CPR at the weekend, mag gear on that is keyed.
__________________


Potest non melior Petter. milia passuum melius quam Lister
Appletop is online now   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 02:00 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.