power loss in flight

Hi

The springs are there to make the carb stay at full throttle in case of a broken actuator cable so if you don´t have enough friction on the lever to compensate the force produced by the springs the engine starts to accelerate.

You have to adjust the friction to a point that you achieve a little beat more oposite side force than the one of the spring.   It is a mater of trying and testing.

Most aircraft carburetors are sprung to full throttle, my S6S has the throttles beside the seats on the left side and are sprung to idle. I will be installing a McFarlane throttle in the center sprung to open at a later date..... a lot easier to balance the carbs 

all right , I agree with the reasoning. can't believe I never loosened the friction knob enough to notice it before.

 now if positioning the vent tube correctly changes anything for the better, life will be good.

Will fly as soon weather permits.    

thanks for responses 

woohoo... so far.

flew for over an hour this morning (over the airport) 45 min at 3000' and several touch and go's. With no hiccups.

It's hard for my non-mechanic brain to think that moving the end of the carb vent tube a few inches could make all the differance. I also drained the low point fuel drain before and after a short warm up three days in a row. Never saw any water or debris. 

Hopefully problem running is cured.

Looking to learn everything about 912 and Rans S6

Thanks for all the inputs. Especially the video about the vent lines position. If anyone wants to talk S-6's or 912's

Dan Dawson, patndandawson@aol.com, 563-349-4059

Read this link before you touch the radiator on the S6, 

http://www.ransclan.com/forums/showthread.php?5475-S-6-engine-cooling-with-radiator-on-top-of-cowling&highlight=S6+radiator