Projects 1917/1928/1938 American Lafrance Plymouth V12 Speedster

Some snap shots off vids from Goodwood of their “chain guards”. Lol! These guys have balls of steel to race those machines.

 

A 40 tooth front sprocket would be doable. I planned on using idlers to set chain tension but now im thinking of making slots where the ubolts for the rear leaf springs go which would allow the axle to be adjusted fore and aft.

Love the rigs at goodwood. I hope i can afford sprockets that look as cool as the lower one.

Today I was contemplating sending the 3d printed gears to a foundry instead of a machine shop. Ill look into pros vs cons of casting.

 

Would a cast sprocket have to be quite a bit thicker than a machined steel one to withstand the stresses?

 

Just read the whole post. I don't have enough adjectives to express the ideas and craftsmanship.
Awesome.
Keep up the great work in 21.

 

Just watched an old Top Gear short vid where Jeremy Clarkson says this of the chain drive on the Brutus Bomber:

“...the chain drive from a machine the devil uses to rotissaire those who displease him..”. Lol!

It was built on a 1907 NY city fire engine chassis.

I would think a simple disc of the appropriate thickness using a water jet would suffice. I remember seeing a lot of sprockets at a farm machinery dealer when I was thinking of a chain drive trans.

 

Pretty good selection here it seems.
https://www.usarollerchain.com/100-Roller-Chain-Sprockets-For-ANSI-100-Roller-Chain-s/2612.htm

 

Those numbers look better!
Nothing says you couldn't have a manufactured sprocket water jetted with holes in your own pattern, unless the maker says no.
Only concern with cast is strength/hardness of the teeth. This can be planned out to work, of course.
Depending on what you can find/buy, you could use old stuff and machine the inner and outer to accept new sprocket teeth.
https://www.etsy.com/listing/917920...2663&msclkid=267c98671c3815d7b388c79516c5aeaa



Even use the pictured parts and bolt it to new outer sprockets like old BMX sprockets

 

The front 40 tooth sprocket is available for $189 from usa roller chain. Ill still have to bore out the center and drill bolt holes but atleast its available.
My rear sprocket will have to be the custom one.


Anyways I started getting the cockpit together.
The 28 plymouth Master cylinder im using needs a remote reservoir and I always thought an oiler would be perfect for it. So i scored one this weekend and it got me energized to figure out my steering column mount and gas pedal so I could see it in place.
I toyed with a bunch of gas pedal designs in my head before I finally settled on this one and I love it. It's simple and comfy. I may put a slight bend in it but not much else.

 

This thing is so badass, whats the plan for intake / exhaust?

 

Thanks
Intake will remain factory. I may do individual stainless exhaust around 10" long or duel lake pipe style. Still chewing it over

 

Got my steering column extended and the steering wheel mounted!

 

Sheer, unadulterated madness. I love it!

 

Nice wheel, about 18 inches?

 

Thanks
She's a 17" wheel. Its absolutely perfect for this rig

 

In case it matters those cast pieces in the iron anarchy picture are seed plates from an old corn planter, you can read - this side away from seed- on the plate on the left. Newer one were made out of plastic. Not sure that is anything you want to incorporate into a drivetrain.

 

Sumbitch, I knew I saw them before. They take a flat chain like a manure spreader too don't they?

 

Seeder plates will definitely not be used on my rig

 

Anyone got recomendations for the sprockets Alloy?

Also started on the gas tank.

 

Steel, could be hot rolled.

 

I personally wouldnt know what to recommend, but if it was me, id look at motorcycle spocket metals. Might be an avenue there??

 

Case hardened steel....

LynnW

 

Got the tank tacked together tonight.

 

That looks great. Wish I had those kind of fab skills.

 

Thanks a ton man. I've made a ton of scrap to learn my trade

 

I dug into the engine today and found a cracked piston. On the plus side of the day I blocked off the second outlet on the water pump.
And really it is time to start teardown to complete welding and to get ready for paint. Ill keep the rear chassis together untill I figure out the chains

 

Now, where do you get a piston?

 

I got a line on a set.

 

Heres alittle update.
Pulled both heads and found nothing else to be concerned about. The bearings miced out in spec and the cylinder walls look damn good so im just gonna hone the cylinders of the 2 pistons I removed and reassemble when I find my new piston.

 

Interesting rocker arm setup. How about some pictures of the cylinder heads, top sides and combustion chambers?