YS 140 DZ going lean in -ve g maneuvers

[Marty King]

I was told by a former national team member that the Polish team, along with several other teams at the Worlds, were putting a check valve in the fuel feed line from the supply to the injector. It seems that at low throttle and some other maneuvers this has helped. Anyone else tried this?
 
Marty King
NSRCA 2551

"Lees,John W" <jlees at mwdh2o.com> wrote:

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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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