Max continues to make great progress on the Otto & Langen
Attached are some photos to document the progress to-date.
The two shafts were next to be made; here the eccentric shaft is in the lathe being machined.
Test fitting the eccentric shaft; a couple small tweaks were required to position the slide valve rod in the center of the slot. Machined to the print it was ~.02” off center.
Next the flywheel shaft was machined and here it’s being checked for proper fit. The gears mesh very well.
Next the rack assembly was made; pictured here standing beside the engine.
The rack was made form a section of stock rack material. After it was brought to proper thickness and width extra material was silver soldered to each end. This allowed the details on each end to be machined.
If you look close you can see the lap joint where the extra material was added. Max said that if he were to do it again that he probably try to machine it from one piece. He had never cut a rack and had some reservations on how successful he would have been.
The rack and clutch gear also mesh very well.
As you can see the upper rack guide has also been made and added to the growing assembly. Also in this picture you can see the small bracket that holds the two arms. One arm operates the pawl and the other one serves to lift the rack assembly to pull the next charge into the cylinder.
The arms are fussy little parts that require many operations and some bending to make them work.
Here the arms have been installed along with the flat spring for the pawl arm. The stud will hold a limiting bracket that will act as a stop to limit the upward travel of the pawl arm.
One last shot of the current assembly; the Phillips head screws will be replaced with proper hardware in the future.
Thanks for checking in,
Dave & Max
