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

Builds, Repairs, Show Your Machines! => Videos The Office of Steam Cinema => Topic started by: Tony Bird on May 08, 2020, 03:43:30 am

Title: Re: Arnot 'V' four marine steam engine.
Post by: txlabman on June 01, 2020, 10:35:55 pm

I am very interested in how you tackle this one?

Looking forward to hearing more Tony.

I believe Bruce made a Quad Cylinder from two PM Research twin cylinders.

Title: Re: Arnot 'V' four marine steam engine.
Post by: Stoker on May 08, 2020, 11:43:01 pm

Perhaps the cam is not very eccentric, so there is not much displacement of the piston involved and thus a low volume per stroke. I have a couple of engines that do have significant gear reduction driving the pump, but those pumps do offer a fair displacement on each stroke.

Title: Re: Arnot 'V' four marine steam engine.
Post by: Steam Technology on May 08, 2020, 11:37:36 pm

What a great engine, I thought these were a bit of a gimmick, but they are definately the real deal.

Title: Re: Arnot 'V' four marine steam engine.
Post by: Scorpion2nz on May 08, 2020, 11:08:45 pm

That should pump some power out when running at full steam .
As for the direct drive water pump i think gearing down would be a waste of time as
there  are 4 cylinders to feed so direct drive would probably be about right .

Cheers
Dennis

Title: Re: Arnot 'V' four marine steam engine.
Post by: Tony Bird on May 08, 2020, 11:43:44 am

Hi Daniel,

Very interesting looking engine, but I'm rather surprised that the pump has no reduction gearing, and is simply crammed right of the crankshaft.

I agree, but I believe a lot have been made and fitted in boats maybe you close the bypass after the engine is started?

Take care.

Stay safe.

Tony.

Title: Re: Arnot 'V' four marine steam engine.
Post by: Stoker on May 08, 2020, 09:53:51 am

Very interesting looking engine, but I'm rather surprised that the pump has no reduction gearing, and is simply cammed right off the crankshaft.

Title: Re: Arnot 'V' four marine steam engine.
Post by: Nick on May 08, 2020, 09:29:50 am

A lot of moving parts on that one. Good luck with it, I know you have the skills.

Title: Arnot 'V' four marine steam engine.
Post by: Tony Bird on May 08, 2020, 03:43:30 am

Hi,

Yesterday I had a delivery from a friend of a steam engine he would like fixing.  It will be a little time before I can get around to working on it but I did run it on air to see its problems.

https://youtu.be/QG4ZMJ8q4Ek

Take care stay safe.

Tony.