Chapter 3 — WIND EQUIPMENT 



by another component, do not discard this unit 

 either until its condition has been proved 

 unsatisfactory by a requisitioned replacement. 



4. Wind vane. — Minor defects and dents are 

 not cause for replacement. If twisted parts affect 

 the accuracy, try to straighten them. If the 

 vane is not repairable, the spare wind vane 

 from the case should be installed (See technical 

 manual (NA50-PMQ3C-1) for detailed pro- 

 cedure.) and another wind vane requisitioned 

 from stock spares. 



No lubrication or cleaning is required by 

 the operator, except that the wind speed trans- 

 mitter should be lubricated every 6 months 

 or at any time the turbine appears to be running 

 sluggishly. 



Check with your supervisor as to how to 

 lubricate the transmitter; or in the absence of 

 a supervisor, consult the handbook for the 

 instrument. 



WIND MEASURING SET 

 AN/UMQ-5( ) 



Wind Measuring Set AN/UMQ-5( ) (fig. 3-2) 

 is the standard equipment designed to provide a 

 visual indication and/or printed record of wind 

 direction and speed values. Various options of 

 the system are provided to permit continuous 

 recording of wind direction and speed values 

 at several measuring sites. 



COMPONENTS 



A set includes a minimum of one transmitter, 

 one support, and one recorder or indicator. 

 A maximum of six recorders and/or indicators 

 can be used with each transmitter. 



Mounting Options 



Although the complete wind measuring set 

 is illustrated in figure 3-2, various options 

 in mounting the display components of the 

 set are shown in figure 3-3. 



Transmitter ML-400( )/UMQ-5 



The transmitter (fig. 3-2 (A)) is a vane 

 mounted on a vertical support. The tail of the 

 vane brings the nose into the wind. The nose 

 consists primarily of a screw-type impeller 



directly coupled to a tachometer-magneto. The 

 magneto voltage output is directly proportional 

 to the wind speed and is connected to the 

 plug in the transmitter's vertical support 

 through brushes and sliprings, then down to 

 the indicator or recorder whose voltmeter auto- 

 matically indicates or records the voltage in 

 knots. Motion of the vane is transmitted 

 mechanically to a synchro located inside the 

 enlarged section of the vertical support. 



The transmitter is placed on top of a con- 

 nector housing. The electrical cable, leading 

 from the housing through the support, goes to 

 any one or all of any combination of six 

 repeaters, whether all indicators or all 

 recorders, or a combination of them. A follower 

 synchro then converts the electrical energy into 

 wind direction indication or recording. The 

 transmitter is designed to carry six repeaters. 



Support MT-535/UMQ-5 



The support (fig. 3-2(B)) is of the tripod- 

 type design, having a tubular upright mast and 

 three legs constructed of tubular steel tubing. 

 Each leg is equipped with a mounting foot. 

 The top of the support is provided with a clamp 

 to hold the transmitter securely in place when 

 mounted. Wires may be run through the center 

 of the mast into the transmitter connector 

 housing. The support may be tilted for servicing 

 the transmitter. A guy plate is provided for 

 the attachment of guy wires, if necessary. 



Another support may also be used with this 

 system. It is very similar to the support 

 shown in figure 3- 2(B) with only minor changes 

 in fittings and provisions for conduit built 

 into it. 



Indicator ID-300( )/UMQ-5 



The ID-300( ) indicator (fig. 3-2(C)) consists 

 of two units: the panel assembly and the 

 mounting case which holds the panel assembly. 

 The panel assembly contains the wind direction 

 indicator and the wind speed indicator positioned 

 in two 4-inch dials, the lighting circuits, and 

 the double- range switch for the speed section. 

 The wind direction indicator consists of 

 a synchro follower on whose rotor shaft is 

 mounted a pointer that indicates wind direction 

 values on a 360°-circular scale. The dial is 

 graduated at the cardinal and intercardinal 

 compass points as well as every 5° from north. 



39 



