The flying monkeys got me...

Helis and fixed wing

AMA 957918
IRCHA 4345
AMA Intro Pilot Instructor

Pirate Kid Skeleton by RadDezigns.

Monday, February 18, 2019

Eureka! Stik is up for flight!


Yes!!!!  Success! The clue was that the engine was flooding at idle, fuel just spraying from the muffler. I suspected the metering side of the carb, so today reviewed a Walbro Diaphragm Carb video and confirmed that on the metering side I have the gasket in the wrong order. The gasket goes against the carb and the metering diaphragm over that. On the pump side the diaphragm goes against the carb and the gasket over that. I fixed the metering side and reinstalled the engine. Started on the first try!   The meter side is the lower one in the diagram below, which is pretty much the carb for the RCGF 10 and 15 cc engines. 

It's very cold outside, but I spent a few minutes tuning the engine. I didn't spend too much time, just got a decent albeit fast idle, smooth transition to full power and a decent high RPM. I had also read that the carb is too big for the 10cc motor, and fast throttle changes can cause loss of vacuum. This was solved by slowing the servo speed, like on landing gear and flaps. For starters I slowed it to 0.2s, and may slow it more once I get it tuned. I am going to wait for warmer weather before tuning it further. Right now I am just thrilled to have it back, occasional four cycling to boot!  Can't wait to rest that "Days Since Our Last Crash" Clock!

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