Timothy,
> Excuse my ignorance but what are 'Phenolic Pads' for the aileron
> bellcranks. I presume we were not issued with them. Never heard of
> them,
> however thats not surprising. Is 'phenolic' a UK trade name or from
> the
> dictionary, a Greek word for substances derived from coal-tar.
> Please enlighten me, and tell me what to ask for from the shop
> assistant.
> Many thanks and Merry Christmas.
>
>
I don't know about trade names; in my experience, "phenolic" has
been a generic term to to refer to the substance. A phenolic block is a
composite with a cloth or fiber matrix and an orange/brownish resin.
Phenolic blacks a usually used as a rub strip or other application where
the phenolic block wears and not the part that contacts it. For example,
I've seen them on the underside of a wing. When the flaps are fully
retracted, the last bit of flap travel causes the flaps to snug up to
the phenolic blocks, so there is no metal-to-metal contact.
Depending on the application, you could also use blocks of
teflon or nylon. I'm not quite sure how they are used on the bellcranks.
I hope this helps.
Andrew
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