ORIGINAL: cmoulder
Matt,
Something else I did - which concerns the issue of erratic running/sagging when doing an outside loop - is to put a ''static line'' (if that is the right term) on the little ambient pressue plate (if THAT is the right term) to counter the pressure changes in the cowl that I suspect cause the erratic running. This worked before when similar issues were encountered with aerobatic models.
Depending on conditions tomorrow, if it isn't too windy and one of the fields where I fly is clear of snow, I will try to get in some more flights. At the very least I'll run the engine some more.
My soldering isn't the best (use one of those little butane torches from Radio Shack) but it is solid and clean.
Also I noticed that the header bolts were loosening up, so I drilled through the bolt heads and made a little ''clip'' from 5/64'' piano. Don't know if this will work either, but it's winter and I am trying to do this since I'm not flying much!
Testing. My first response went no where
OKAY THEN!!! That time it worked
Bob,
I've read the static line help before from Don Lowe if I recall. It apparently helped one of his set-ups. If I remember correctly, it settles down the reference pressure that the pump "sees". It allows for steadier pumping I think, but I am not certain and I am not an expert in gasoline engine function. It shouldn't hurt anything and I may do this some time too.
In the limited flying runs I've made, i haven't noticed erratic running on outsides in the test bed but that may be due to lack of flights.
I know my field is still snowed in but possibly with temps in the 40's today, we can get most of that to disappear. I am sure the CA and FLA crowd is laughing at our snowed in woes. I know I did when I lived in FLA (BG). Tables have turned.
Anyway, planning to do some bench running today on the 18x12. Here're a couple photos