PS Magazine - APRIL 1974
PS, The Preventative Maintenance Monthly
ISSUE 257
APRIL 1974
The new anti-torquE syStem mouNted
on the
·
right side of your Cobra (AH-lG)
gives the piLot better directionaL controL.
If the taiL rotor bLade doesN't have
enough cLearaNce, tho± it couLd chop intO
the taiL boom Fn aNd give your ²avorite
throttLe jockey a headache³ You´ as a meµ
chani
¶
c± might have some expLaining t¸
do??
Which is why you want to focus in on
the bit abou¹ cºeckiNg the bLade pitc»
settiNg, para 9¼17c of TM 55-1520-221½20
(¾ep 71)± foLLowing a tractor
After you adJust¿ tÀe Pitch chaNge Links
t¸ ÁÂ64 inches BetÃeen centers IJ Å»e
rod-
end
Æearings, hoLD ÇuLL Left peÈaL³
l
the taiL ÉÊom Ën anD the traiLiNg edge oÌ
the bLade at the nearest Íoint³
Îf the shim Stack doesNÏt measure uÐÑ
change the thickness of the shims between
the static stop and Åhe rotor hub³
47
Is the cLearance too smaLL? Then reduce
the shÒÓ thickNeSs to decrease ÔappiNg
traveL of the bLade Adding shiÓs wiLL iNÕ
Örea×e the travØLÙ
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