About 800 ft of altitude. Note that I failed math twice in middle school. Tom
On Sun, Jul 19, 2020, 20:16 Rob Thompson <[email protected]> wrote: > G'day Everyone, > As many of you will know I am OCD about sealing every tiny air leak in the > Limbach engine bay compartment with silicone, aluminium tape and rubber > cowl seals. > > I have previously rigged up a water manometer in the cockpit with the > tubes running to the top and bottom of the engine. It told me I was getting > very good pressure difference but I didn't take much notice of the actual > measurements. I think it was somewhere around 30cm. > > As well as the ram air going into the front of the engine the lower cowl > is designed to "suck". We fitted a big scoop type bottom cowl which seems > to suck pretty well.... particularly with the baffles tightly sealed with > silicon. > > What I am wondering now is..... What is the effect of this extra suction > at the back of the engine on the carbs and mixture? > > Maybe it is not much different to flying at altitude and the SU carbs > altitude compensating ability can deal with it. > > Any fluid dynamics physics experts in this Dog group who can enlighten me? > > regards > Rob > > Rob Thompson > 0429 493 828 > >
