ORIGINAL: MTK
The velo stack appears to be just as I thought...smoke and mirrors. Maybe there is some advantage on large engines but it doesn't amount to much on the 180. It mutes the reed sound some because it is located inside the fuse
One thing about choking the carb using the finger, it is much more effective than the baffle. Rocking the prop 15-16 times with finger choke, promptly flooded the thing.
I think it may only need 3 or 4 cycles and would be ready to fire.
At the contest this weekend I found I needed to open the canopy to access the velo stack practically every time I needed to start the engine. It needed one choke cycle and it would fire up pretty much immedietaly, but then I had to re-install the canopy....it was inconvenient.
With the regular choke baffle on the engine, it seemed that I didn't have to re-choke the engine but that could be because it was not idle for a couple hours between flights. Even if it needed choking, it was much simpler to actually do.
In my opinion, the velo stack just isn't worth the hassle as it is set-up today. If it also had some means of choking without opening the fuse up, then it would work fine. I think I will return to Todd's baffle set-up.
There was considerable interest in my set-up and Bob Moulder's. Several guys asked questions. A couple of them actually own the SAP180 but have not run it as yet.