Waterline measurements

[morrow39]

We have a question about measurements in a 170A. Does anyone have an answer to this.

Hello gents,

The question that we are looking to answer is - Does any one have waterline dimensions for the Cessna 170A ?

Station numbers are dimensions measured from the vertical datum of an aircraft. In the case of the 170A, the datum is the firewall.
All stations forward of the firewall have a negative value. All stations aft of the firewall have a positive value. The firewall is 0 (zero).
Fuselage bulkheads all have positive values carried out to 2 (two) decimal places. (i.e. bulkhead 117.38 is one hundred seventeen and thirty eight hundredths inch aft of the firewall)

Waterline dimensions are needed to complete the equation. With the aircraft level to Cessna specs, the dimension from the wing spar attach points to the wing strut attach point is what?
A line which passes through the wing attach points and extends aft to the tail is parallel to a line which passes through the horizontal stabilizer attach point. What is the dimension between those two lines?
The same type of information is need to ensure correct location of all critical components.

Either confirmation from two sources. or factory blueprints. or engineering notes are desirable.

Robert
pending A&P

Dave Morrow
morrow39

[n2582d]

On my 170B the measurement is roughly 51.5". With the strut attach point being recessed in the fuselage it is difficult to get an extremely accurate measurement.