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:bow: The Wallaby is really starting to come together well now Pete - Good going! Kind regards, Arnold

Hi Stan Yes, the cam is an approximation of a spiral - Elmer used three circle arcs to approximate it, though he does not refer explicitly to its construction in the text. The process he describes is basically an exercise in "milling to the line. I did a quick exaggerated drawing construction...

Congratulations Chuck - well deserved recognition for an innovative and inspiring build :bow: Kind regards, Arnold

;D It's good to hear you're kicking high Carl - watch that tutu - just in case there's a bit of Scottish influence ;) Been missing the references to that Jelly Jar :big: Kind regards, Arnold

Hi Stan. It is the steam/air connector. The hole on the side of the cylinder block is the exhaust. Edited to add: If I recall correctly, the Grasshopper's plans does not actually show a drawing for making the air/steam connector; you have to make that to suit your own needs. This is how I...

Jim, thanks my friend :) This one's a bit slow - once it's done it'll join the others on the side-board in the lounge to trap unwary visitors :big:: There's some missing there; I've given away a couple, and others are paperweights in my office. The office ones might join this crowd at home soon...

Looks great so far Bob :bow: ??? I cant see from your drawing how you're going to easily get to clean ash/crud out from below the grate if you're going to use solid fuel. Kind regards, Arnold

Thanks for checking in Pete. Oakspring, thanks; they are nice engines, especially to see running for real. Thanks Jim - it was a bit of a challenge to build, but somehow I'm finding my current build of Elmer's Kimble a bit harder. Good luck Chris - its a fun build, and from people's reactions...

;D Thanks for the video Mick Thm: It runs well on air - I like the slow-speed running. ;D Keep us updated on your progress - the bits visible from the boat itself looks great as well! Kind regards, Arnold

Hi shearwater Welcome to HMEM! That's quality-looking engine and boiler building you show in the video Thm: Do you have a video of the engine running under steam ? - that would be great! Kind regards, Arnold

:bow: Thanks Jo - I like the little machine! ;D Ok, now I understand just why your shoulder aches and you have a blister to boot - I was wondering how the shaper was operated! Kind regards, Arnold

Thm: That IS a nice score Holt ;D Guess you'll have to bring out the elbow grease soon to clean it up! Kind regards, Arnold

That's good going Jo :) I'm intrigued by that hand-powered shaper of yours; do you have any more photos of it ? Kind regards, Arnold

Congratulations Wayne - that's a nice Scotty :bow: ;D I agree; it is a nice engine to build! Kind regards, Arnold

Very nice engine Dave Thm: Well Done! Kind regards, Arnold

Hi Holt. I'm not sure what gears that specific lathe would use. Myford change gears are 20 DP (diametral pitch) which is 1.27 Module - and they have a pressure angle of 14.5 degrees. Kind regards, Arnold

Good going Jeroen Thm: If you want to temper the silver steel after hardening it, it must not get anywhere near red hot again; that will just anneal it and lose nearly all hardness. After hardening and grinding it, gently heat it on the shank side with a torch, and keep a close eye on the...

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Hello Harvinder Yes, we do have members from India on HMEM. Could you post a bit more detail on your interests in engine building and home engineering? - it would be really nice to read which parts you are interested in and enjoy doing Kind regards, Arnold

I second Ken on that :) - Thanks gents! Kind regards, Arnold