Needle Valve Setting problems - Page 3 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 07-22-2011, 08:56 PM   #21
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I am: peter,P
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Location: toronto,ontario

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Re: Needle Valve Setting problems

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hey rene;

just wondering is your engine a 61 fsr or 61 sf?
also wondering what your airplane is ?
prop size?
muffler or tuned pipe?
which perry pump are you using ? regulator or oscillating type?

the oscillating type works best on 4 strks but can work on 2 strks,
however the regulator type is BEST for 2 strks.
with the regulator perry pump there is a pressure regulator adjustment screw which should be turned out if fuel volume/ pressure is excessive

always loved the pattern discipline

good luck
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Old 07-23-2011, 06:24 AM   #22
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I am: Rene W
Join Date: Dec 2004
Location: Red Deer Alberta
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JR 622, Spektrum DX8
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Re: Needle Valve Setting problems

Hi Peter;
The engine is a 61SF, the plane is a "Merlin" pattern ship, the muffler is pit style, the prop is 13x6 and the pump is a regulating type. I have played with the regulating screw but still ran into the problem, too rich in level flight or excessive leaning out in vertical. I did eliminate the pump and totally rebuilt the fuel system which improved the situation considerably.

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