Alyn Foundry RLE hit and miss stationary engine: take 2. 

It's hit and miss governed, so the governor holds the exhaust valve open so the engine "free wheels" until the rpm drops and the latch releases closing the exhaust valve. This allows the 4 stroke cycle to take place and the exhaust will latch again after the engine fires. Highly popular turn of the century until the 1940s, while power inefficient they are highly fuel efficient.

@@skankingiant I love the sound of the old hit and miss engines. - nice model

It's a type of governor, to stop the engine from over-revving. Without it the engine would rev much too high and blow up. All stationary engines have a governor of some type to control the engine speed when it's not under load. Most common governors now are a centrifugal type that controls the throttle opening to keep the speed constant. Absolutely vital.

@@brucerogermorgan2388 wow, I didn't get even the least bit of what it was. Thanks for the answer.

​@@brucerogermorgan2388not strictly true, there are quite a few old engines without a governor and you can control the speed with the air fuel mixture. My old Tom Senior simplex and the little unknown 2 stroke I have are examples of engines like this.

Give us a chance, only just put it back together 😅. Got an Adept lathe here it will power.

@@skankingiant Sweet, last Hit&miss I saw in person was powering a wood shop's fans. "They aren't show pieces, they are tools"

@@MWB2Bleachfan well this one is a just a model designed in the 1980s and sold as casting sts, so technically a toy for home machinists.

@@skankingiant one I saw was a 11hp beast like 3 foot long