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@GreenTwin. Thanks for posting those. I could look at them for hours. I have a book on machine sketching from the time period. I'll see if I can find it tomorrow. Thanks again!!

Agreed on all counts. Kozo is the master of clarity. .....and I'm pretty sure he's still producing drawings by hand at 2X the scale in the magazine. For that, I can't even come close. Line widths add a huge amount of legibility to the drawing. I usually use one weight for solid lines and a...

When I take on a previously-designed / kitted engine I tend to rethink the entire design as I go through it, refining it as what I imagine would be the next step the original designer of the kit would have done anyway. For the 1/4-scale NH, I narrowed the hopper walls, added a bead around the...

At this point we're probably in the "maybe next year" mode on the Black Hills Show. We had intended on going, but at this point it's more of a trip than we can really afford. :(:(

I did a similar, lower-volume method by taking urethane rubber molds off of the original matchplates for the Parsell & Weed model and then using these and Freeman Repro urethane to produce multiples of the same piece. These were mounted to 3/4" baltic birch matchplates. This method is probably...

@Jasonb This is spot on. Our core boxes are sand-cast aluminum, machined and polished smooth. These are set up for a hot-process, shell core (blown) coremaking machine at the foundry we work with in Hanover, PA -- another reason to work closely with your foundryman. The patterns for the core...

@GreenTwin That bottle engine would be a bear to mold. The cores would be real head scratchers. Nice engine tho, and definitely worth the extra effort. Thanks for sharing. Todd.

@GreenTwin , I like the look of your drawings and enjoyed them in LSOR as well. They are excellent. I follow some basic rules when I'm drafting for model engineering. None of these are hard and fast, but may give some insight into how someone else "does it" 1) Assume the person reading the...

Lots of good insight and conversation here. THANK YOU!! The NH base casting is the most-difficult rendering I've done in the 35+ years working with CADD and 20+ years of 3D modeling engine designs. Jason is spot-on. This thing is a beast and has pushed me and my CAD system (TurboCAD...

@GreenTwin, we agree that the available casting kits on the market have been dwindling; however, rest assured that Joy and I have no intention of slowing up in doing our part toward adding to the market, and continuing to support the Hobby with our little business. We purchased a long-extinct...

I was looking something up this evening and found a video of the winding process. This was done on an Atlas 10" at about 27rpm. Enjoy, Todd.

@stang86efi I usually order my springs from MSCDirect.com. They have thousands of different ones, and some that are close to what you're calling for. By going with a little larger in diameter, you can handle a slightly heavier wire and still maintain a light spring rate. The page below has...

@cheepo45, GREAT JOB on the build! @minh-thanh, That's the inertia governor arm. It latches with a catch on the exhaust rocker to hold the exhaust valve open for the idle strokes. For the horizontal version of the engine, gravity helps to hold the arm down as a roller descends into a divot in...

Hello Scott, Excellent job on your engine. There's nothing like the first time the engine springs to life. Enjoy! Todd.

Very nicely done and a nice running engine. Nice Job, Todd.

I will have two sets of these castings at Cabin Fever this weekend if anyone else is interested.

Joy and I will be there in our usual spot. :) :cool: Long-range weather is looking great for Friday (37-degrees / mostly cloudy), and not bad for Saturday with temps around 40 with a 45% chance of rain/snow mix. Mild weather usually helps to make a great show. Last year's Covid protocols...

This is the info on the 2022 show posted elsewhere on HMEM. (Black Hills Show 2022) Show is September 24-25 Central States Fairgrounds, Fine Arts Bldg, Rapid City SD. Contact Mike Stutz 970-690-0012 or [email protected]. Guessing the 2023 show will most-likely be September 23-24...

Hearing that NAMES is not on again this year, Joy and I are hoping to make it to the Black Hills Show in SD.

We've found the same thing regarding purchasing supplies, etc. The foundry we use in Hanover, PA actually has the same issue even though they cast 6-days/week. They have agreements with a larger foundry and purchase from them. We mostly use C873 Everdur bronze for our castings. I called an...