Long Range Tanks?

[jimmuse]

Thanks for all of the responses.

The serial number is 1665.

According to the POH diagrams, if it is a standard system, then it should have the sump tank, like on my '67 337B, with a quick drain plug in the boom.... and if long range, then it would not have the sump with quick drain in the boom, but two quick drains next to the fuselage.

Thats the way this one is, which begged the question.

I will call Cessna on Monday and see if I can get the original weight and balance documents. And also take a look in the ships documents and logs.

There is a w&b from '91 that derived the empty weight by subtracting the 888 lbs. The latest w&b ('02) derived its numbers from the '91 version.

I have the aux tanks on my '67, and never really worried about fuel, because I rarely flew over 4 hours... even on a couple of legs. This is really making me think about duration... especially down into Mexico.