The Museum of HP Calculators


MANN METRIC (Mannings formula) for the HP 42S

This program is by Ken Delsnider and is used here by permission.

This program is supplied without representation or warranty of any kind. Ken Delsnider and The Museum of HP Calculators therefore assume no responsibility and shall have no liability, consequential or otherwise, of any kind arising from the use of this program material or any part thereof.

Overview

Program Name MANN METRIC
Function Use to solve for any parameter using Mannings formula.
Where:
N = Manning Coefficient
Q = Flow in cubic metres per sec
D = Diameter in mm
L = Length in metres
HL = Headloss/HGL in meters

Listing

00 { 79-Byte Prgm }
01>LBL "MANN"
02 MVAR "n"
03 MVAR "Q"
04 MVAR "D-mm"
05 MVAR "LEN"
06 MVAR "HL"
07 RCL "Q"
08 RCL "n"
09 
10 3.20836
11 
12 RCL "D-mm"
13 1E3
14 
15 2.6667
16 Y^X
17 
18 2
19 Y^X
20 RCL "LEN"
21 
22 RCL "HL"
23 -
24 END

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