Hi All,
I figured I would add my 2cents worth since I have finally gotten my 7-77 in the air. I have read the entire forum and followed Toms advice on limiting the throttle travel on the stock carb to about 70% and have had no problems achieving proper needle settings.
I am using a McDaniels on board glow driver that is set to come on just above idle. I have a very reliable 1200 rpm idle with good response from the engine and am getting about 4800/5000 WOT .
I have run both regular glow fuel with up to 20% oil and run the alcohol blended 50-50 with 5% cool power.
I actually seem to get a better run using regular glow fuel over the blended . The high speed is backed down 2 to 3hundred rpm from max and the idle was adjusted for a good transition . I am running a 22" x 12pitch prop and it pulls the plane with authority .
These engines are definitely different to run than a regular glow engine ! But are really worth the effort when you hear them fly and idling back to the pits is a real treat .
I have also noticed that they seem to like flying over being run on a test stand .
Just my 2cents worth and YMMV .
CzDaveC