YS 140 DZ going lean in -ve g maneuvers

[Lees,John W]

 I thought DZ's were crap, had several different tanks, clunk's, ect. Not
until I went to a Bladder tank{no air in media} did the engine run flawless.
Since then it has never even hick-upped. 
It is of my opinion that the DZ will not tolerate any air in the fuel
delivery system. --john
-----Original Message-----
From: PENNISI Peter [mailto:Peter.Pennisi at publicworks.qld.gov.au]
Sent: Wednesday, May 12, 2004 5:29 PM
To: discussion at nsrca.org
Subject: YS 140 DZ going lean in -ve g manoeuvres


Hi all,
 
 
My DZ has only returned from holidays in Japan were it was repaired by YS
from another cam failure.
 
 
The engine is running absolutely superb except when you pull high negative g
manoeuvres like the reverse humpty bump it gets a little lean for a few
seconds put it does come good.
 
I have re-plumbed the model put the problem is still there. 
 
Running
 
APC 16 x 12
OS F plug
Tetra 20 oz tank with OS sintered(Spelling) bubble less pickup.(Yes the
expensive one)
Hatori exhaust (698 pipe)
Coolpower 30% heli blend
Model is ZN-LINE Alliance.
 
Any suggestions
 
 
Peter
 
 
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