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Hi Everyone, the current situation in the world and work has afforded me a bunch of much needed extra time in the shop. I finally sourced the remaining neck casting I needed to start making the frame.
IMG_2700.jpg
Here is what I started with, a badly cut up '25 frame and a few castings. The piece of large OD pipe was originally going to be my new neck casting and about 6 hours into lathe work not shown I found an original. The I had this motor just waiting in the bark for this day.
IMG_2705.jpg
I was able to borrow this original frame (not the same year) to take some rough measurements from. In the background, on the frame, you can see the original tank tube casting showing how much taller the chief motor is. I added approximately 2' to the seat tube this raising the tank bar up the same and after fitting it up had to lean the seat tube back a few degrees as well. This did two fold as i will use that area between the seat tube and motor for the generator.
IMG_2767.jpg
Here you can see the pattern I made from the original top tube on the borrowed frame traced on the bench. I Filled the tube with sand and heated to bend. It is clamped in a V-block on one end and resting in a V-block on the other. When I bent it the other block was used a sliding guide to keep the tube and table co-planer
IMG_2804.jpg
I use self leveling lasers at work (carpenter) often and this is a fine use for them too! this allows me to reference all tubes against each other for a dead straight end product, as long as your initial datum is perfect. This frame took a pretty good hit in the floorboard at one point requiring some strightining of the sub assembly to get to this point. The New tubes going into the neck appear long but are only 2' longer than original, I had to cut to some bad tubing
IMG_2784.jpg
Here are the two frames next to each other, This was my final proportions check before brazing the castings. The modified frame looks a lot bigger in this photo but its mostly the angle of the shot. I will be back later today with more photos
Dan
IMG_2700.jpg
Here is what I started with, a badly cut up '25 frame and a few castings. The piece of large OD pipe was originally going to be my new neck casting and about 6 hours into lathe work not shown I found an original. The I had this motor just waiting in the bark for this day.
IMG_2705.jpg
I was able to borrow this original frame (not the same year) to take some rough measurements from. In the background, on the frame, you can see the original tank tube casting showing how much taller the chief motor is. I added approximately 2' to the seat tube this raising the tank bar up the same and after fitting it up had to lean the seat tube back a few degrees as well. This did two fold as i will use that area between the seat tube and motor for the generator.
IMG_2767.jpg
Here you can see the pattern I made from the original top tube on the borrowed frame traced on the bench. I Filled the tube with sand and heated to bend. It is clamped in a V-block on one end and resting in a V-block on the other. When I bent it the other block was used a sliding guide to keep the tube and table co-planer
IMG_2804.jpg
I use self leveling lasers at work (carpenter) often and this is a fine use for them too! this allows me to reference all tubes against each other for a dead straight end product, as long as your initial datum is perfect. This frame took a pretty good hit in the floorboard at one point requiring some strightining of the sub assembly to get to this point. The New tubes going into the neck appear long but are only 2' longer than original, I had to cut to some bad tubing
IMG_2784.jpg
Here are the two frames next to each other, This was my final proportions check before brazing the castings. The modified frame looks a lot bigger in this photo but its mostly the angle of the shot. I will be back later today with more photos
Dan
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