Author Topic: Rail Road Pump Trolley on tracks (Read 12428 times)

flyingtractors1 · « **on:** February 04, 2012, 10:56:05 PM »

This is a 1/32 scale Rail Road Pump Trolley I've been working on. Now I'm training the Guinea Pigs to work it.

Ralph

Bernd · « **Reply #1 on:** February 05, 2012, 08:48:39 AM »

Neat.

You must be into the model railroading hobby?

Me too. I work (play) in the HO, HOn3, On30 & O scales.

Bernd

Stilldrillin · « **Reply #2 on:** February 05, 2012, 10:32:33 AM »

That's really nice!

David D

wd · « **Reply #3 on:** February 05, 2012, 12:00:51 PM »

Great looking model Ralph wonder if you could offer a snap shot of the under side.Looks mechanistic.

Thanks
wd

Rob.Wilson · « **Reply #4 on:** February 05, 2012, 12:33:46 PM »

Nice one Ralph

Rob

flyingtractors1 · « **Reply #5 on:** February 05, 2012, 02:21:40 PM »

? ?

Sorry. Try again. Ralph

flyingtractors1 · « **Reply #6 on:** February 05, 2012, 02:50:58 PM »

Another view of the platform and mechanism. I'll try to post an action video soon as I can figure out how.

Ralph

wd · « **Reply #7 on:** February 06, 2012, 11:36:50 AM »

Ralph

I'm a bit confuse how are the axles attach to the frame? Would like to make one myself.Is the model made from a plan?Or was it made off the cuff kinda thing .

Thanks
wd

flyingtractors1 · « **Reply #8 on:** February 06, 2012, 06:18:04 PM »

Hi WD. Thanks for your inrerest in the trolley. Sorry, I don't have any plans for this model. I just built it as I went along using simple tools. The axle that you see in the picture is a hollow tube soldered onto the rails, and the wheel shaft rides in the tube which was notched to accomodete axle and drive gear. Same with the crank and the other set of wheels. I'll try to draw up and post a sketch. It was a fun and simple build. Ralph

flyingtractors1 · « **Reply #9 on:** February 06, 2012, 07:54:24 PM »

Hi All. We've got the trolley in motion on a short track.

Ralph

Stilldrillin · « **Reply #10 on:** February 07, 2012, 02:26:25 AM »

That's great Ralph!

Short, (very), but sufficient for the grin factor....... Well done!

David D

Divided he ad · « **Reply #11 on:** February 08, 2012, 01:28:25 PM »

Blink and you missed it! That thing is fast!!!

Very nice looking model Ralph

I have just one thought. Not trying to learn all your secwets but.... How does the crank mechanism ratchet?

I'm just guessing it has to pump then freewheel? Never really thought about it till I saw your model!

I have some small needle roller clutches that would work that way. But they're 1/2" far too large for such a machine.

Ralph.

flyingtractors1 · « **Reply #12 on:** February 08, 2012, 08:04:43 PM »

Thanks. It really isn't that fast -it's a product of the video host. Just play the "previous" frame then play "next" again and it slows down some. I'll try to post a more worthy video. Yes, it pumps half of the cycle then freewheels the other 180degrees. A racheting mechanism would be ideal, interesting and challenging. Ralph

DaveH · « **Reply #13 on:** February 08, 2012, 08:36:30 PM »

Great stuff Ralph

DaveH

Bernd · « **Reply #14 on:** February 09, 2012, 09:51:49 AM »

Hey Ralph, it works on the same priciple as the "finger machine" Bog's built, except it (pump trolley - intersting name) has no flywheel.

Here's a video. It's hard work.

Bernd

flyingtractors1 · « **Reply #15 on:** February 09, 2012, 01:42:53 PM »

Thanks Bernd. Yes, it is the same principle as the "finger machine", but the wheels of the cart serve the purpose of the flywheel and allow it to scoot along as they turn. Ralph

Divided he ad · « **Reply #16 on:** February 09, 2012, 05:08:42 PM »

Ahh! A crank I see

I see it a bit slower now Ralph. looks fun with the little guy on there too

Ralph.

MadModder

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