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+--- Forum: HP-41C Software Library (/forum-11.html)
+--- Thread: (41CV) Helicopter SH-3 NATOPS (/thread-13735.html)
(41CV) Helicopter SH-3 NATOPS - SlideRule - 09-30-2019 06:05 PM
An extract from Development of NATOPS Performance Software for the SH-3D and SH-3H Helicopters, John Thomas Curtis (LtCmdr USN), Naval Postgraduate School, Master's Thesis, MAR 1985, 106 pgs.
"ABSTRACT
This thesis generates closed form equations for significant and frequently used NATOPS performance charts for the SH-3D and SH-3H helicopters. These equations are developed into interactive software for the Hewlett-Packard HP-41CV hand-held programmable calculator. With this software installed in the calculator the user is able to calculate numerous NATOPS performance parameters (expeditiously, with reduced risk of error) both prior to and in flight;
…
APPENDIX A: NATOPS PERFORMANCE SOFTWARE USER'S GUIDE … 21
_A. BASIC USE … 21
_B. SUPPLEMENTARY PROGRAMS … 24
_C. GENERAL USER INFORMATION … 24
_D. INITIAL CALCULATOR PREPARATION … 25
_E. CALCULATOR FLAGS … 26
_F. CALCULATOR MEMORY REGISTERS … 27
APPENDIX B: REGRESSION EQUATIONS AND SOFTWARE DOCUMENTATION … 28
_A. ENGINE PERFORMANCE - TOPPING (721°C T5) … 29
_B. LOW PITCH AUTO RPM … 34
_C. SINGLE ENGINE WATER TAKEOFF … 37
_D. AIRSPEED CALIBRATION … 40
_E. TEMPERATURE CONVERSION … 41
_F. DENSITY ALTITUDE … 44
_G. BLADE STALL … 47
_H. ENGINE PERFORMANCE - MILITARY (696°C T5) … 52
_I. ENGINE PERFORMANCE - NORMAL (660°C T5) … 55
_J. TORQUE TO HOVER IN GROUND EFFECT … 59
_K. TORQUE TO HOVER OUT OF GROUND EFFECT … 62
_L. MAXIMUM RANGE - TWO ENGINES … 65
_M. MAXIMUM ENDURANCE - TWO ENGINES … 70
_N. ABILITY TO MAINTAIN FLIGHT - ONE ENGINE … 75
_0. MAXIMUM RANGE - ONE ENGINE … 81
_P. MAXIMUM ENDURANCE - ONE ENGINE … 86
_Q. GROUND ROLL - POWER OFF … 91
_R. MASTER PROGRAM … 94
_S. PRINT PROGRAM … 102
…
A similar software development for the H-46D helicopter was conducted at the same time as this development … Because of the nature and complexity of the problem, the initial stages of these investigations were a joint effort. As a result, the approach to the problem … and the basic method of Solution … of this work … are very similar."
BEST!
SlideRule
RE: (41CV) Helicopter SH-3 NATOPS - Ángel Martin - 10-01-2019 02:32 PM
you're really outdoing yourself - I can't keep up ! ;-)
Keep them coming !
RE: (41CV) Helicopter SH-3 NATOPS - Ángel Martin - 10-01-2019 02:33 PM
(10-01-2019 02:32 PM)Ángel Martin Wrote: you're really outdoing yourself - I can't keep up ! ;-)
Pls. keep them coming !
RE: (41CV) Helicopter SH-3 NATOPS - SlideRule - 10-01-2019 03:18 PM
I 'lumped' these links together to facilitate your efforts for the 41CL. I'll glean my files for any 'strays'.
BEST!
SlideRule
ps: check the 'helicopter' threads in HP-65/67/97 & General Software Library threads.