Tire hammer question

[2Tim215]

Hi all

 

Was hoping someone would know the hammer (and person) in below pic.

 

 

I am planning to build another hammer in the next few months and am perticularly interested in his use of a shock absorber instead of the normal spring arrangement usually used. My first was based on the little giant and I don't like it so am either going for the leaf spring or something else.

 

Any info on how this hammer worked etc would be appreciated

 

 

Thanks

 

Tim

[ThomasPowers]

The home built hammers using shock absorbers that I have knowledge of were not considered as good as other linkages; the absorber absorbing quite a bit of power from the system.  You might ask Jock over at anvilfire.com about his experiences with the one he built.

[Geoff Keyes]

I built a #50 hammer after the first JYH 's were built.  We used a spring package from a truck, re-bent to keep the width down.  The shock absorber hammers were an early try.  The shocks were too slow to respond and they stole energy from the system.

 

I used a Champion as a model and came up with this.  With very few mods it's been in operation since 2000

 

 

One thing you might consider is a tire drive version of a Rusty.

 

Geoff

[macbruce]

I think it could be done with a passive air cylinder better than a shock absorber....But the R&D could get oppressive and expensive. Hackney hammers worked very well. I've only seen one mechanical/air hammer operate and I was impressed.

[2Tim215]

Thanks Thomas, thought that would be the case.

 

Thanks Geoff - what you have there is what I have in mind but with a tire at the bottom driving a pully system. Tried the pully drive on its own and found a tire driven system far more responsive.

 

Thanks macbruce, what I originally had in mind for the hammer was a truck coil spring in a cylinder with a 50mm centering shaft - would work like a shock without losing any energy. Might just give it a go just to see if it would work.