Quote:
Originally Posted by schwarze-man
Hi Peter,
The 3355.1 is the metal specification and, the symbol is the metal makers trademark. The slight "starry" ribbing of the diaphram is to add stiffness to it. The "bakelit" ring is a support ring that fits tightly onto the front of the propellor hub (Nabe) to hold the Haube steady and prevent it distorting in flight. That ring is described as gummi in the manual. It would be a hard rubber. Many other support rings like that are made in Tufnol, which is a reinforced resin. Cheers
SM
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Hi SM
Now all make sence . Thanks for clarifying these issues
Greetings
Peter