Tri Gauge - Yak 52
Working when removed.
All tanks, pipes and gauges related to oil in the Yak 52, 50, 55 and 18-T are colored Dark brown. The top arc of the three indicators displays Oil temperature, denoted by the brown dot with the Celcius units mark.
Oil pressure is to the lower right.
Everything that contains, controls or indicates fuel in these aircraft is painted Yellow. The left hand gauge with the Yellow dot is Fuel pressure.
A different scheme is found on the connectors at the rear, but since both the receptacle on the gauge and the mating Cannon plug are color coded, it's easy to reconnect them properly.
All Electrical Items are sold without warranty and cannot be returned. All sales are final.
Thanks for your understanding.
Voltage / Charge meter - Yak 52
The white numbers on the larger scale are Amperes, discharge to the left of zero and positive charge upto 60 Amps.
Depressing the button below the scale switches the readout to Volts, which can be read on the inner yellow scale.
All Electrical Items are sold without warranty and cannot be returned. All sales are final. Thanks for your understanding.
Manifold Pressure meter - Yak 52
Working when removed.
The Yak's M14-P motor is lightly supercharged so it's possible to see overboost at sea level on takeoff.
The metric units of pressure were unfamiliar to US Pilots, so somebody decided that the Russian word below the needle (starting with a Cyrillic character that looks like an H) should be pronounced 'Potatoes'.
Ever since then Yak pilots can be heard discussing power settings as '7 potatoes and 70 percent' - or something like that.
In unmodified, factory-equipped Yak 52's, this Manifold pressure instrument only appears in the front cockpit, it being assumed that any Russian Instructor worth his salt would be able to know the manifold pressure without needing a gauge.
Clock, АЧС-1, Yak 52
Turning he left knob anticlockwise winds the spring.
Pulling it out allows you to set the hands. Push the knob to start the second hand, a subsequent push stops it. The third push resets. Minutes duration are recorded on the 60 minute subdial.
The right knob can be rotated to the right to stop the clock, preserving the spring energy, and also controls the stopwatch.
Vertical Speed Indicator, Yak 52
Carburetor Temp gauge, Yak 52
Ice formation in the carburetor is indicated by resistance when the Power Control lever (that moves the butterfly throttle) is operated. The Yellow Carburetor Heat lever, available on this site, combats the formation of Carburetor Ice by redirecting warm air from the cylinders to the Carburetor entry.