Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

The Regular Stuff: Chat, Buy, Sell, Off Topic, etc. => General Discussion - Scale Model Gas Engines - Hit & Miss - Throttle Governed - Non-Compression – etc => Topic started by: Jim on October 24, 2020, 09:01:36 pm

Title: Re: Got the M90 down to around 48 hits a minute with softer springs
Post by: Jim on November 07, 2020, 04:23:36 pm
These little engines are ridiculously addictive, a few months ago I could never have imagined myself mucking around with petrol engines.

What's that old saying "Never say never" !
Title: Re: Got the M90 down to around 48 hits a minute with softer springs
Post by: tony1951 on November 06, 2020, 02:23:50 am
That engine is running nicely there Jim. I need to send for some suitable springs to test like that. I currently have one of the original springs slightly over stretched, connected across the centre of the governor.

That lubricant might find a use on my motorcycle chains. I lube them now with 90 weight gear oil applied every tank of petrol (about 200 miles) with a small paint brush. I apply it sparingly since more will be thrown off, and I don't want it on the rear tyre for obvious reasons....
Title: Re: Got the M90 down to around 48 hits a minute with softer springs
Post by: Jim on October 27, 2020, 08:35:20 pm
Quote from: St Paul Steam on October 27, 2020, 08:08:27 pm
you have that running Sweet Jim , now the curios side of me wants to know how you got all those springs in the vice at one time without 3 other ones falling out before you got the vise closed again...lol

LOL Bruce, there was some frustration (and a little cursing) to get those all standing up, I was determined that they would be though :)

There was just enough slop in the vice jaws that I could pull it out just a touch and squeeze each one down, took a long time to get them all up and then tightened the vice.
Title: Re: Got the M90 down to around 48 hits a minute with softer springs
Post by: St Paul Steam on October 27, 2020, 08:08:27 pm
you have that running Sweet Jim , now the curios side of me wants to know how you got all those springs in the vice at one time without 3 other ones falling out before you got the vise closed again...lol
Title: Re: Got the M90 down to around 48 hits a minute with softer springs
Post by: Jim on October 27, 2020, 07:56:33 pm
Quote from: RedRyder on October 27, 2020, 07:52:25 pm
Nice work, Jim!


I love your spring research department!

Thanks Gil, lot of effort went into the SRD :)
Title: Re: Got the M90 down to around 48 hits a minute with softer springs
Post by: RedRyder on October 27, 2020, 07:52:25 pm
Nice work, Jim!


I love your spring research department!
Title: Re: Got the M90 down to around 48 hits a minute with softer springs
Post by: Jim on October 24, 2020, 11:38:16 pm
Quote from: Stoker on October 24, 2020, 11:32:30 pm
Nice work Jim ..... keep after it and keep reporting back mate!!!

Thanks Daniel, can't believe what time wasters these are... boy oh boy am I having fun. Now I know why everyone else's posts/threads sounded so happy when they were talking about these little gas (I mean petrol - see you guys are rubbing off on me :) ) engines.
Title: Re: Got the M90 down to around 48 hits a minute with softer springs
Post by: Stoker on October 24, 2020, 11:32:30 pm
Nice work Jim ..... keep after it and keep reporting back mate!!!
Title: Re: Got the M90 down to around 48 hits a minute with softer springs
Post by: Jim on October 24, 2020, 09:48:18 pm
Quote from: Nick on October 24, 2020, 09:43:36 pm
That lube sure looks to be some good stuff

So what’s the next mod to the engine?  ;)

Nick to be honest mate, it makes me a little nervous to take one of these apart too much and muck up how good they are running.

I really did like what @odu50 did to his in this thread though -

https://www.officeofsteamforum.com/general-discussion-scale-model-gas-engines-hit-miss-throttle-governed-non-compression-etc/m-90-modification/
Title: Re: Got the M90 down to around 48 hits a minute with softer springs
Post by: Nick on October 24, 2020, 09:43:36 pm
That lube sure looks to be some good stuff

So what’s the next mod to the engine?  ;)
Title: Got the M90 down to around 48 hits a minute with softer springs
Post by: Jim on October 24, 2020, 09:01:36 pm
Got the M90 down to around 48 hits a minute with softer springs.

https://youtu.be/LDhDwSAnTns