Heinkel Engines have a fan screwed onto the armature that provides cooling across the cylinder fins on the engine. If you get something caught in the fan it is possible to break blades. A high speed spinning fan that’s off balance could vibrate excessively.
How do you fix a fan blade? I decided to try using epoxy and then try a test to see if it would hold .
Here’s the fan. I’m lucky only one blade was broken. If I had a lot of broken pieces I’d consider buying a new fan, although there are supposedly 5 or 6 different fans and none of them are reproduced by the club.
|Heinkel Fan with Broken Blase at Bottom|
Here’s my fan. The bottom blade is broken off. My first step was to clean this up so the epoxy fan would stick to it.
|Two Part Epoxy in Cross Section|
I decided to use a semi-solid epoxy roll that I would mold into shape. You cut a section of glue off of a roll and roll it out to activate the hardening process. After rolling it out I used the existing fan blades to mold the replacement blade to the proper shape.
|Molded Blade in Place on Fan|
|Heinkel Fan Repair from Top|
|Testing Fan Repair on a Wood Lathe|
The Result: Passed with flying colors! I think it’s a good solution. It’s slightly softer and a bit flexible, is more or less the same color as the rest of the fan, and it’s pretty easy to do. I recommend it.