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philgower(at)rappsystems.
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 Posted: Wed Jul 28, 2010 1:02 am Post subject: M14P cold starting |
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Hello, following on from my inability to get the engine started on my Yak18t recently in outback Australia where I was confronted by extremely cold overnight temperatures, I have done some research into the problem and if interested you can read about it by clicking on the link below.
To get a final working procedure I left my aircraft out overnight and left it to 'soak' in the low overnight temperatures we have had recently here in Toowoomba.
http://rappsystemscomau.melbourneitwebsites.com/auth/main/sb/preview/stage/files/starting_the_m14p_from_cold.pdf
Cheers, Phil (Gent from Australia - for Mark).
p.s. Next write up I am intending to do on the 'shower of sparks' with hopefully meaningful test data to go with it.
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psb777
Joined: 12 Aug 2009
Posts: 34
Location: UK
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| Posted: Wed Jul 28, 2010 9:08 am Post subject: Re: M14P cold starting |
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Phil, if the crankshaft is turned 720 degrees every piston has gone through each of the 4 cycles of a 4-stroke engine. OK, in various orders, so double it, if you really must. 1440 degrees, or 4 full rotations of the crankshaft. How many (2-bladed prop) propeller blades is that? 4 * .6 = 2.4 prob rotations or 4.8 blades. Call it five. In what way have you improved the priming of the engine past the fifth blade? I wouldn't bother pulling 16 blades for priming, as you suggest in your notes, as all that fuel-air mixture blown out the exhaust valves cannot help do anything but start an (external to the engine) engine fire.
| | - The Matronics Yak-List Email Forum - | | | 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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_________________
Paul Beardsell
G-PYAK http://beardsell.com/flying/g-pyak
Yak-18T http://beardsell.com/flying/yak18t |
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