Ernst Plank Hot air trolley / tram ... 65mm / 8 gauge 1900 + -

Neat find! 

Hi Carey , what an amazing find !

While not having Stirling Locomotive experience I do have a bit of a fiddle with normal Stirling stationary engines

The key to these are a few main points , most of which you have covered in your initial post , but I will restate them anyway...

Stirling engines are by their very nature very inefficient so the key to running them is to maximise heat transferrence and minimise friction loads .. so yep light oil everything and clean and reapply the minute it becomes tacky. Ensure all the rods are as straight as possible and running true, a little slop is better than being "bindy"

Next you will want to aid heat uptake as best you can using a good quality fuel and I use either fibreglass wicks , or cotton rope ones , I have heard of sisal being used as well . The key to the wick is not so much absorbancy of the wick material , but more the delivery of fresh fuel to the burn site by capilliary action .

Temperature differential is what makes this little bugger hum and finding the sweet spot can take some experimentation , but in short you are wanting the fire side piston to uptake the heat from the burner and then expand the air inside the cylinder ( driving the piston) until it completes the expansion stroke and intakes more cold air from the displacement piston assembly . Yours appears to be the normal 90 degrees between the two , so make sure when you do fire it , you are rotating it the right way , they CAN run backwards ( but poorly)

I would probably look at cleaning the heat side cylinder and espescially the finned area , you want to get rid of as much heat from outside the expansion area as much as you want that expansion area to uptake the heat as efficiently as you can ... Some people even put a small block of ice on the displacement cylinder to further increase the differential between the hot and cool air ...

Cylinder clearances are also critical in maintaining the expansion of the air on the hot side and transferring as much cool side air to the cylinder ... if just slightly worn through use you can put a smidge of fine oil inside the bore/onto walls from below to help improve the seal and efficiency .

Running Stirlings without a load isnt that hard , but it might take a bit of experimentation with them under load as that really stresses their capabilities ... Always keep in mind it is the temerature differential and ability to harness it ( good tolerances,low friction) that will determine how it runs

I am a little bit jealous ( lol ) but then again I always am when you post your amazing early stuff!

Oh and a good site for info ...  http://www.stirlingbuilder.com/troubleshooting-tips

As a complete aside you also have the opposite end of the scale with a Flame Licker Engine... where it intakes hot air from a flame source and then it cooling in the cylinder causes the piston to move UP due to the CONTRACTION of the cooling air ... I have thought about making a train with one I have , but its on the "to do" list which seems to get longer as I get older

What a find!

I found some information on a Plank hot air tram here: 

https://www.historytoy.com/pla...-red-green-gauge-III

Regards

Fred

Carey - all original condition? Exceptionally nice. Congrats!

Jim

CAREY: I would respectfully suggest you lose the 70% denatured alcohol and get some PGA (pure grain alcohol - 95%!) at your local liquor store, which will provide much-added BTU's or heating calories! GOOD LUCK with that treasured find!

PS: Although liquor store PGA is consumable, keep in mind it is 190 Proof, and will likely knock you on your gluteous maximus fairly quickly! CAUTION is in order here! LOL!

Hello all ....thank you for all your in put ...and suggestions ....

You may enjoy a video by Danny Jannssen from the Netherlands    who is  running a lovely Schoenner   live steamer ...but also on the table is a hot air  Ernst Plank tram    please see link '

https://www.facebook.com/10000...eos/976159059251088/

I'll order some new wicks and give it a go again before   kicking in the high power BTU 's ...

Can you use pure grain in lamps ? misc burners ? ...  cheers Carey

GOOD LUCK, and be safe!  ☺

Beautiful find, Carey! A Stirling engine - how cool is that?

Carey Williams posted:

 

Can you use pure grain in lamps ? misc burners ? ...  cheers Carey

 

 

 

 

Ahhhh I keep forgetting you Yanks dont necesarily have the good stuff ... yep the purer the better as oposed to denatured ... if you can source it you can also go the pure Isopropanol route ... which is basicaly the purest you are gonna get commonly sold @99.8 or higher % but it can burn with a sooty flame if the burner is not situated properly . Pure Methanol is also good if you can source .

Pure Grain is your best bet but Iso/methanol will give more heat .

Hello all.....I've been having fun testing various liquids ... Heet, and Ever clear appear the best so far ...but still not enough to pull the trolley on the track ...run the motor yes ..but dies once on the track ...new fiberglass wick  no better then old cotton one ...looks like ordering some Methanol ..is the next step ....  here is a video of the motor running ... there is some wear in the shaft with the fly wheel ...so the slop may not help the situation ...   unique sound ....Cheers Carey 

This is mistakenly wrong information:

The flame is very blue and should be more yellow; I assume it is caused by the type of spirit. Here a picture of a 95% spirit flame testing:

Regards

Fred

Hello Fred ...thank you for you help ....ok what exactly are you burning for the yellow flames ? ...is it available in the good old USA ? ...  are you using cotton or fiber glass wicks ?   Thank you   Cheers Carey 

Be VERY careful with methyl alcohol, as it is toxic and poisonous, and can also pass through the skin. Also, do not inhale the vapors! Better PGA (ethyl alcohol) or isopropyl alcohol. Better to err on the side of CAUTION!

Denatured alcohol from the Home Depot comes in quarts, is not drinkable, but full strength.  Might actually be more pure than Everclear.

Another thought - is the piston tight in the cylinder (little or no blow by?). That will dramatically reduce the power.

Jim

Maybe a little high-temperature steam oil used by the live steam folks for those pistons? 

Just looking at the video , thats probably about half the speed or less than I would expect it to run at unladen, it seems like there is some binding somewhere? I am wondering if perhaps there is some build up of old lubrication in the displacement or main cylinders, leading to an overtight clearance? I would run it for as long as you can with the current burner and see if it runs a bit better over time , if not then it might be time for a pull down and clean? I think your heat source is ok as it is def providing enough heat to expand the gases ...

my gut kinda tells me the power side of things is trying its best but its being foiled somewhere... is the flywheel loose/wobbly enough that it wanders sideways a teeny bit and fouls on the crankhousing , and/or the crank itself rubbing inside ? it wants to run , but it really looks like something its holding it up ? (frictionwise)

I can see in the video the flywheel assembly itself has some both horizontal and vertical slop? or is it just a bit out of true ?