18 



3. ROLL AND PITCH ANGLE TRANSDUCERS 



a . Amplitude Range 



Roll ± 4-5 degrees 



Pitch ± 15 degrees 



b. Frequency Range to 3 cps 



c . Linearity 



Roll ± 1 degree 



Pitch ±1/4 degree 



4. AMPLIFIER AND RECORDER 



a. There will be a total of 5 channels. 



b. The frequency response of the accelerometer channels should be such 

 as to give at least 95~percent attenuation at 5 cps and less than 10-percent 

 attenuation at 1 cps. The frequency response of strain-gage channels shall 

 be such as to give less than 5-percent attenuation at 5 cps. 



c. Paper speed of recorder is to be l/2 inch and 1 inch per minute. A 

 record is to be obtained by scribing on pressure-sensitized paper or the equiv- 

 alent thereof. Provision is to be made for a chart rewind mechanism. 



d. Power supply to the recorder will be 110-v a-c 60-cycle at normal 

 regulation (±10 percent). 



e. Accelerometer channels - Sensitivity 



The amplifiers are to have the same sensitivity as for all other 

 channels, but attenuators shall be provided to give over-all sensitivities of: 



1 inch and 3 inches per g for linear accelerometer 



1 inch and 3 inches per radian/sec 2 for angular accelerometers 



The tolerances for the over-all sensitivities shall be the same as specified 

 for the linearity of the accelerometers (Item 2d). 



5. ADDITIONAL REQUIREMENTS 



a. The equipment should be rugged and not require attention for sev- 

 eral weeks. 



b. The equipment is to withstand salty, humid atmospheres. 



