Model Boat Mayhem

Mess Deck: General Section => Chit-Chat => Topic started by: boatmadman on March 22, 2012, 03:28:21 pm

Title: What I did while Mayhem was away....
Post by: boatmadman on March 22, 2012, 03:28:21 pm
I made a yoke engine to ease the withdrawal symptoms.

All made from scrap, and no eggs were harmed during construction. :-))
Title: Re: What I did while Mayhem was away....
Post by: Mad_Mike on March 22, 2012, 03:49:23 pm
does it work?
Title: Re: What I did while Mayhem was away....
Post by: richald on March 22, 2012, 04:06:32 pm
More like HOW does it work ?

Richard

(working towards his Full Mayhemer badge!)
Title: Re: What I did while Mayhem was away....
Post by: Martin (Admin) on March 22, 2012, 04:09:09 pm

I chewed my nails a lot.... and banged my head.....

Nice engine - is it April 1st already?   ok2
Title: Re: What I did while Mayhem was away....
Post by: boatmadman on March 22, 2012, 04:26:14 pm
It turns ok, a little tight yet with newness, and I havent quite got the timing spot on yet.

Brownie point to anyone who can work out how it works!  :}

Ian
Title: Re: What I did while Mayhem was away....
Post by: davidm1945 on March 22, 2012, 04:34:59 pm
Quote from: boatmadman on March 22, 2012, 04:26:14 pm


Brownie point to anyone who can work out how it works!  :}

Ian

It goes round and round and in and out......but wassit for?

Dave
Title: Re: What I did while Mayhem was away....
Post by: Netleyned on March 22, 2012, 04:48:08 pm
http://www.youtube.com/watch?v=hAhMrAJCXmk

Don't want brownie points I like Donuts

Ned
Title: Re: What I did while Mayhem was away....
Post by: U-33 on March 22, 2012, 04:57:24 pm
Quote from: Netleyned on March 22, 2012, 04:48:08 pm
http://www.youtube.com/watch?v=hAhMrAJCXmk

Don't want brownie points I like Donuts

Ned


Bad for the figure, old chap...
Title: Re: What I did while Mayhem was away....
Post by: rmaddock on March 22, 2012, 05:01:47 pm
I presume the smaller wheel has a pin which engages a vertical slot in the piece which is clamped onto the piston?
Title: Re: What I did while Mayhem was away....
Post by: Netleyned on March 22, 2012, 05:04:41 pm
Quote from: U-33 on March 22, 2012, 04:57:24 pm

Bad for the figure, old chap...

Excuse me Sir
I have a figure like a trawler

Only smaller

Ned
Title: Re: What I did while Mayhem was away....
Post by: Martin (Admin) on March 22, 2012, 05:23:17 pm
High pressure pump?
Title: Re: What I did while Mayhem was away....
Post by: boatmadman on March 22, 2012, 05:32:17 pm
Full points Mr Maddock. :-))

The design is intended to reduce piston skirt wear on the cylinder by doing away with a top end pivot. The piston rod is fixed into the piston.

Its an old design, dont see many of them about now and was origionally a steam engine.

But, whats it for? What is any engine for? Wasting energy, making noise and if you are lucky, doing a bit of work!

Ian
Title: Re: What I did while Mayhem was away....
Post by: Mad_Mike on March 22, 2012, 06:19:05 pm
looks just like this blokes engine:

http://www.youtube.com/watch?v=UL3k2wZvHtk
Title: Re: What I did while Mayhem was away....
Post by: boatmadman on March 22, 2012, 07:24:45 pm
That's where I got the idea from. Did a bit of googling, found some plans and bobs yer auntie!
Title: Re: What I did while Mayhem was away....
Post by: Mad_Mike on March 22, 2012, 08:41:14 pm
how do the valves work?
Title: Re: What I did while Mayhem was away....
Post by: boatmadman on March 22, 2012, 09:35:14 pm
Its a rotary valve incorporated into the crank shaft. The inlet is at the rear between the upright and the flywheel. As the crank rotates, a port is opened to the supply which feeds through drillings in the upright to the top of the cylinder. 180 deg on, the exhaust port opens the drillings in the upright to a vent passing through the centre of the crank to the outside.

Ian
Title: Re: What I did while Mayhem was away....
Post by: irishcarguy on March 23, 2012, 05:46:15 am
I cried a lot but now that I have seen boatmans engine I am crying some more, not for me you fools, for him & his engine. Mick B.