GhostLine06 Posted April 23, 2015 Posted April 23, 2015 My question is simple (and I am almost embarrassed to ask but there is no such thing as a stupid question, right guys )... How are these gauges meant to be read exactly. Maybe I am over-thinking this, maybe I am under-thinking it, or maybe I have been so used to digital read outs all my life that I just can't get into the head-space required to figure this out to a point where I can actually trust my conclusions. I don't know. What I do know is that I have a hard time hitting the RPM and MP numbers provided in numerous CEM guides without feeling like I am doing damage my Russian planes. So I am not going to say anything further, as I am probably off when it comes to what I think I know about these gauges, and I will hopefully have the community here show me what's what (Google was no help to me btw, but maybe my Google-Fu was just too weak).
reve_etrange Posted April 23, 2015 Posted April 23, 2015 My question is simple (and I am almost embarrassed to ask but there is no such thing as a stupid question, right guys )... How are these gauges meant to be read exactly. The tach is like a clock - short hand is the thousands place, long hand is hundreds. The tick marks are in increments of 20. So in the first picture, the gauge reads ~610 rpm, in the second ~2010 rpm. The manifold pressure gauges only have one hand indicating hundreds place, with the same tick spacing, giving ~640 mm Hg in the second picture (gauge is between zero and 300 in the first picture, as the dial starts at 300). The temperature gauge is straightforward and marked in Celsius. Sorry if I didn't understand your question properly. 1
JimTM Posted April 23, 2015 Posted April 23, 2015 (edited) For the Tachometer: - Large marks are hundreds of rpms for the large hand and thousands of rpms for the small hand. - Small marks are 20 rpm intervals for the large hand and 200 rpm intervals for the small hand (but the small marks aren't important for the small hand). Read the small hand first to get thousands of rpms and then read the large hand to get hundreds of rpms. In the first picture, ignore the small hand, since it's not at the 1 mark (1000 rpm) yet. The large hand indicates about 610 rpm. In the second picture, the small hand indicates 2000 rpm and the large hand indicates about 10 rpm. So the reading is 2010 rpm. For the Manifold Pressure gauge: - Large marks are hundreds of mm of Hg (Mercury). - Small marks are 20 mm of Hg intervals. In the second picture, the reading is about 645 mm Hg. Hope that helps. Jim Edited April 23, 2015 by JimTM 1
GhostLine06 Posted April 23, 2015 Author Posted April 23, 2015 Great guys, thank you both very much. I was almost correct, but the tach had me confused, I guess I wasn't sure of the long hand being the 100s, but it makes completer sense now.
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