Thanks, have had them for years and never noticed that the underside drawing shows that right side fill hooked to the Aux pipe. Thanks for pointing it out!
Love this drawing because it has the original OM tender that it used up until 1962. cool how they used two tender frames stacked on top of each other to reach the height of the rotary apron. This was done on OM, ON and the the RGS rotaries. He includes some great drawings of the current tender and the 0471 water car. He does a nice side profile drawing of the ex tender water car but doesn't include the wheel set. Wish he had information on the underside of that car. That is my missing piece. Not horribly concerned on the HOn3 models I have made of OM. I ran the piping under the car coming out under the end sill across from the tender aux pipe. But I'm building a 1:20.3 scale OM with this aux car. In that scale it is a little more noticeable.
I have a great pic of D&RGW SG 071 with an ex tender water car. It is very early as D&RG 017. The aux is modified as a permanent aux car and running backwards. I can't see the lettering on the aux though.
The CNW used aux water cars on their rotaries early on also. Rotaries are incredibly thirsty. The Great Northern handled this problem completely differently
tenders with a 15,000 gallon capy. The SP did this to a lesser degree.