I am a U.S. citizen. I earned a BSME degree, due to my childhood interest in hovercars. I worked in the aerospace industry for over eleven years, prior to retiring in 2008. I worked for the following aerospace companies:

• Hamilton Standard
• Pratt & Whitney
• McCauley Propeller Systems
• Atlantic Inertial Systems

I contributed to the success of many notable products, some of which include:

• Xian MA60 regional airliners
• General Atomics Predator B (aka Altair and MQ-9 Reaper) UAVs
• Raytheon AMRAAM air-to-air missiles
• Boeing Peackeeper ICBMs
• Boeing Minuteman III ICBMs

I also contributed to the success of some notable services:

• First stage turbine blade testing and analysis
• Transonic compressor rotor (known as an IBR or Blisk) R&D for the AFRL CARL
• ICBM inertial sensor R&D

Highlights of my involvement with these products and services are listed below:

• Assisted with the FAA vibration certification of the Xian MA60 composite aircraft propeller installation
• Performed tests and analyses, to determine the root cause of first stage turbine blade cracking
• Designed the three blade, solid aluminum, constant speed, aircraft propeller for the General Atomics Predator B UAV
• Used FEA to show there was a discrepancy in the hot and cold shape models of a transonic compressor rotor being studied and tested by the AFRL CARL
• Performed a mathematical analysis which prevented the recall of hundreds of AMRAAM air-to-air missiles, by showing a manufacturing deviation actually improved performance
• Solved a build issue with inertial sensors used on Boeing Peacekeeper ICBMs
• Used FEA, testing, and mathematical analysis to determine the root cause of a complex thermally induced vibration excitation issue with inertial sensors used on Boeing Minuteman III ICBMs
• Led a team and performed analyses wrt ICBM inertial sensor R&D

The most rewarding project was designing the aircraft propeller for the General Atomics Predator B UAV, due to the impact that the aircraft has had on humanity.

I had many reasons for creating PROP_DESIGN and releasing it as open source, public domain, software. I began studying aircraft propellers, while attending college, in the early 1990's. I found it difficult, and time consuming, to obtain information on the subject. I also found that many papers did not include source code. With the advent of the internet, several aircraft propeller design programs became available. However, these were based on old methods and had many limitations that I was unwilling to accept. The main one being the inability to design swept propellers. I had been planning on combining the work of Adkins and Liebeck with that of McCormick, to allow for swept propeller design, until I found a code called PROPSY. I re-coded PROPSY from the author's Master's thesis. Over time, I found and fixed numerous and substantial errors with PROPSY. I also added many new capabilities. PROP_DESIGN eventually evolved into a completely new aircraft propeller design theory. Releasing PROP_DESIGN as open source, public domain software, was my attempt at giving everyone easy access to the best aircraft propeller design information available.

PROP_DESIGN is currently available at:

• https://propdesign.jimdofree.com

This domain has been active since December 19, 2019. I don't host the code anywhere else. If you find a copy of it elsewhere, know that I had nothing to do with it.

Many years ago, someone started claiming they developed PROP_DESIGN. In fact, he still makes this claim, on his website. This really bothers me. To be clear, no one has developed PROP_DESIGN but me.

He created a modified version of PROP_DESIGN. I don't mind people creating modified versions of PROP_DESIGN. But I don't like anyone claiming they've developed PROP_DESIGN. If you create a modified version of PROP_DESIGN, all I ask is that you call your program something other than PROP_DESIGN.

This person also copied pictures from my website. The copied content included renderings (that I created with PROP_DESIGN, Rhino, and Keyshot) and performance maps (that I created with PROP_DESIGN and Gnuplot). He used these pictures on his website and in presentations that he's made. This is just incredibly unethical. At this point, I'm surprised he hasn't changed his name to mine. Don't be like this guy!