[REPORTED] Warning pushlights

[-0303-]

I edited in this near top to my largish post.

Ed/add: Think about this. Think about how much current (a lot) the heavy operating hydraulics solenoid coil swallows then 28 V is applied to it. Think about putting a lamp in series with this. Think the lamp would not shine? I don't know what kind of lamp the push lamp is/was but I'm pretty sure it would be current limiting. The lamp would limit the current to not burn up itself. P = U x I. Imagine lamp is 3 W. 3 = 28V x I, I = 107 mA. If the coil was 20 W it would draw 714 mA.

Found the lamp!

 

AN3121-313

Can order it from Walmart ... or Amazon.

• Volts: 28
  
• Watts: 4.76
  
• Amps: 0.170
  
• Bulb Shape: T3.25
  

Googling "AN3121-313" gives lots of aeropart firm hits. Ironically only Amazon and Walmart gives technical info.

 

P = U x I

4.76 = 28 x I

I = 170 mA as Walmart says.

 

From "f-86f illustrated parts breakdown.pdf" page 2-342 & 2-342A (pdf 394-395) (again thanks drPhibes). The hydraulic Transfer Valves must be in there somewhere also. Panel (see 37):

 

 

Se 37 in parts list and note lamp "AN3121-313".

 

Edited June 29, 2019 by -0303-

[-0303-]

Found a DC loading chart.

"Surface control alternate system return and supply valve at 0.7 Ampere" second from top in list, must be the Alternate System Transfer Valve. And no 6 from top is the Normal System Transfer Valve (it shuts off when the alternate open (and vice versa), therefore called "bypass" here?). Everything else on that list has another explanation (that makes sense).

 

So the lamp is 4.76W/170mA and the solenoid is 19.6W/700mA

 

The valve will not move (that would be insane to have the push lamp control the valve *1), but the lamp will shine (I'm pretty sure).

 

Figure 7-4. D-C Loading Chart Sheet (2 of 2) page 467 (pdf 473) "F-86F Flt Manual + perf data"

 

NO. ----------EQUIPMENT-------------MAX---MAX-POWER,

REQ.D--------------------------------AMPS--WATTS

 

The first at 48.5 Amp is the alternate system hydraulics pump of which the flight manual says it'll drain the battery in 6-7 min without functioning generator. So lose the generator and you have 6-7 min of controllable airplane?

 

*1) The schematics say when you push the ALTERNATE TO push-test lamp it will connect in series with the Alternate Transfer valve (with the same polarity as when it's normally operated). It'll get max 170 mA since the lamp limits the current, it needs 700 mA so 170/700, it gets 24 %.

 

 

~

 

 

Ed/add.

Lamp has 165 ohm (28 / 0.17)

Solenoid has 40 ohm (28 / 0.7)

 

 

It'll be voltage dividing. 28 x 165 / (40+165). Lamp gets 22.5 V, current is 137 mA (28 / (40+165)).

Edited July 5, 2019 by -0303-

[-0303-]

A simplified summary I prepared two years ago but never got around to posting. May update with corrections / more information. The solenoid 25386-5 can be bought here. The lamp AN3121-313 can be bought from Amazon or Walmart

Edited December 7, 2021 by -0303-