Model Engine Maker

Help! => Mistakes, muckups, and dangerous behaviour => Topic started by: Mainer on November 08, 2012, 01:29:46 AM

Title: Places not to put your "Miser" engine
Post by: Mainer on November 08, 2012, 01:29:46 AM: Do not put your "Miser" engine on a woodstove. Although it will run flat out in grand fashion for a while, the foam displacer piston may melt:
Title: Re: Places not to put your "Miser" engine
Post by: black85vette on November 08, 2012, 02:35:17 AM: Arrrrrrrrrgh! :wallbang: Sad to hear about that.
Title: Re: Places not to put your "Miser" engine
Post by: Jo on November 08, 2012, 07:11:10 AM: Oh dear :facepalm:, Am I correct in thinking the miser is was a low temperature differential engine?

Jo
Title: Re: Places not to put your "Miser" engine
Post by: tel on November 08, 2012, 08:12:41 AM: BUGGER! :hammerbash:
Title: Re: Places not to put your "Miser" engine
Post by: steamer on November 08, 2012, 10:06:21 AM: Bugger is right! I would appear the displacer piston is now a mere carbon footprint!.. :( :(

Sorry to see that bud!

Dave
Title: Re: Places not to put your "Miser" engine
Post by: b.lindsey on November 08, 2012, 11:22:02 AM: Oh man...sad to see...but as long as the acrylic displacer cylinder is ok, it should be repairable with some new foam. Had a similar incident with Jerry Howell's mini stirling fan last week which required making a new displacer stem and crank rod and the pesky little clevis joint connecting them...so I feel your pain. It was time for some maintenance anyway :embarassed:

Bill
Title: Re: Places not to put your "Miser" engine
Post by: rleete on November 08, 2012, 02:18:50 PM: Make a new displacer out of balsa wood. Nearly the same weight, no melting.
Title: Re: Places not to put your "Miser" engine
Post by: NickG on November 08, 2012, 09:01:38 PM: Quote from: Jo on November 08, 2012, 07:11:10 AM
Oh dear :facepalm:, Am I correct in thinking the miser is was a low temperature differential engine?

Jo

Yep - is a complicated finger engine now
Title: Re: Places not to put your "Miser" engine
Post by: Don1966 on November 08, 2012, 11:24:10 PM: I did the same thing a few years ago. I had purchased a differential engine and it was suppose to run on 20 degree temperature different. Well it didn't so I place it on the stove to get more heat, bad mistake I hadn't realized the displaced was foam and melted. I had purchased it from scisupply.com and called and the owner sent me another. When I matched the two together they were different. The one that was on my engine had a slot Across one side of it, where the new one had a second layer to cover the slot. Yea, no wonder it wouldn't run.now it run with a cold PAC.

Don