Guys,

I've posted on a few boards and have not gotten pictures or drawings of the 1949 Red glow head for the Drone diesel. My understanding is it was anodized red. Several suggested that I just take a standard diesel head and have a flat spot mill in the center and tap it for a glow plug. This I have seen but what I would really like to see is pictures of a factory unit from the top and bottom to see if they changed the volume (and thus the compression ratio) for glow use. If someone has one and could post some pictures and a sketch I would appreciate it.

As a side bar I think Leon Shulman is still flying R/C if someone can get in touch with him he could provide the details, that would be great.

Best,          DennisT

Guys,

Got the heads set up for glow am now working on getting a good seal on the head gasket. Seems the Drone head hold down bolts holes are tapered not flat and as you tighten down the head moves and can distort the cylinder. I plan on making them flat so the bolts don't cause any shifting.

All looks good there is enough meat on the head for a short reach plug or a long with a thick gasket. I did put a little hemi into the bottom of the head to reduce the compression and get a little smoother burn. The hemi is only about 1/16" deep, used a 5/8" round ball mill bit in a drill press, then smoothed it out with sand paper.

Best,          DennisT