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Author Topic: New M92 not running  (Read 693 times)

eec1910

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Re: New M92 not running
« Reply #15 on: August 14, 2020, 01:45:22 pm »
Finally got the engine to run by using a stiffer spring on the exhaust valve, thanks for the
Suggestion Ade. The engine moves about a lot due to the sloppy fit of the wood the engine sits on
Will have to make a new box. It still runs a bit fast but can,t slow it down anymore as the governor spring
Has been trimmed, still spits out a lot of fuel and runs for about 5 minutes could do with a tank much bigger,
Has anyone else noticed the short running time ?.

Thanks Trevor.

yozhek

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  • Location: Somerset, England
Re: New M92 not running
« Reply #16 on: August 14, 2020, 03:39:07 pm »
Hi Trevor,

Good news you got it running :D

I have a M90 box that is unused if you want it, i found running a bead of epoxy around on the inside to fix the top sheet to the sides really firmed it up and stopped the oil etc. from getting inside.  Mind you, to stop them hopping around takes a ton of weight, that M90 with the PM research dynamo i posted the video of ages back has two 15mm thick brass plates, one on top and the other underneath with lead filling all the free space inside and that just about held it still...

Best regards
Ade

RedRyder

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Re: New M92 not running
« Reply #17 on: August 15, 2020, 01:37:35 pm »
Hi Trevor, Watch this and try similar with yours.


Gil


https://youtu.be/mY-rgVnZiKU

eec1910

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Re: New M92 not running
« Reply #18 on: August 19, 2020, 02:35:17 pm »
Thanks for the ideas Gil ,had already trimmed the governor spring and the linkages on my engine
don't move as much as yours but it still runs a bit quick compared to your engine .Just one question,
how far retarded have you made the timing on your engine ?.

Ade the suggestion of running some epoxy round the inside of the box has cured the movement
problem thanks for that.

Cheers Trevor.

RedRyder

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Re: New M92 not running
« Reply #19 on: August 19, 2020, 03:47:53 pm »
My M92 is set to fire just a hair after top dead center.

eec1910

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Re: New M92 not running
« Reply #20 on: September 03, 2020, 10:38:31 am »
Here's a video of my M92 engine running finally, the exhaust has been extended and the sensor wiring
hidden, i've also retarded the timing and cut 1 1/2 turns off the governor spring.

Thanks for all the help in getting it to run.

Trevor.

https://youtu.be/DLQFoW83Cps

yozhek

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Re: New M92 not running
« Reply #21 on: September 03, 2020, 11:50:12 am »
That sounds good Trevor, i like the idea of the wood around the box to stop it wandering off.

Best wishes
Ade

RedRyder

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Re: New M92 not running
« Reply #22 on: September 03, 2020, 10:32:46 pm »
Hi Trevor, Good to see you have it running. Now you need to make the governor allow it to hit and miss.

Steam Technology

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Re: New M92 not running
« Reply #23 on: September 04, 2020, 02:53:52 am »
Is it running comtinois rather than hitting and missing?
ALWAYS WORKING TO FIND A CURE FOR CENOSILLICAPHOBIA
Cheers. Dave.

RedRyder

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Re: New M92 not running
« Reply #24 on: September 04, 2020, 03:11:12 pm »
Yes, that is what is happening

RedRyder

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Re: New M92 not running
« Reply #25 on: September 04, 2020, 09:00:25 pm »
Trevor, by the looks of things you can straighten it out by stretching the tiny spring in the governor fineal.
(a little at a time until you have the desired result)


Gil

70Rcode

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Re: New M92 not running
« Reply #26 on: September 13, 2020, 06:29:48 am »
Now that's unique you don't see every day..... Consistent Hits (no percectable misses) at such a strangely pleasantly low rpm speed !!  Please revealed the secret ....I've got the "hit, miss miss miss miss" down good but still a bit overall, too fast rpm....I could deff use some of that action to make my M90 run very realistically scale slow speed......tom.

 

September EOTM Winner:

Trevor’s "Bassett-Lowke Steam Generating Plant c1934"