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The RUPP Tricycle

Just driving home the other day and this was parked in a yard with a “For Sale” sign on it. I told my wife that my first job was working in the engineering department at RUPP Industries, and had worked on developing this tricycle. She said “Don’t you want to go back and check it out?”


RUPP tricycle side view

RUPP tricycle side view

RUPP Tricycle rear view

RUPP Tricycle rear view

I started at RUPP as a mechanical drafter, part time, in a sort of work study program that the vocational school had set up with the local companies. I had been trained at the Pioneer Joint Vocational School in Shelby, in the Design and Drafting 2 year program, junior and senior year of high school. When I graduated they hired me full time.

It was so cool. I was working on the development of snowmobiles, four wheeler’s, and then I was assigned to work on the tricycle development. They let us “borrow” these toys to take home for the weekend. I was assigned to work with one of the main design engineers. He was creating this from scratch. It was really fun participating in the design and drafting function, with all the required documentation. These were all hand drawn, multiple sheet layouts. They trained me in lofting in order to properly document the shroud. That is the same technique used on boat hulls. I had the opportunity to work along side and learn from a great group of engineers and designers. And, at the same time demonstrate that I could contribute to the overall design effort. It was a great place to start out. I am sincerely grateful.

And, here is a link my wife found about the RUPP Tricycle…


Yep, my first real job. And, here it is 42 years later…

me and the Tricycle

Me and the Tricycle



When you put pen to paper, there is a connection made between your mind and the words you are writing. That connection gets your mind working on the getting across that thought you put to paper. I do mean the physical connection of a physical pen and actual paper.

When you sketch your ideas and thoughts on a design, it gets your creative function running because you have to think about how you want to describe it. Believe me, once you start, you may have several ideas, several iterations, probably partials that you can continue with later.













It is hard for some to get up and share your thoughts by sketching in front of someone or a crowd of engineers and mechanical designers. They will make comments about your sketching ability, so get over it now, and move on. Sharing your thoughts through sketching will get others on board with your idea and motivate them, and yourself, to do more iteration through sketching.  image





Sketching your idea to yourself will help you develop and effectively explain your design idea to a fellow engineer, mentor, or manager.







White write-on boards are great for sharing and capturing ideation.


…sketching thoughts and ideas on a white board works just as well, but remember to take a quick photo for your records. These notes could be used for patent work, so it is always a good idea to get your initials and date in the photo, or on the sketch page.


There are instances in mechanical design that you know what you want, but a sketch will make it clearer to the others what you see in your design. Once the understanding starts, there will all kinds of input as to what might be better…that will be up to you.



Just let your thoughts flow from your mind through the pen. You will surprise yourself on how the design will flow and morph. And, as you go through page after page, your thought pattern will become clearer. Perhaps you have not considered something that is critical, or important to the design overall function. As you continue to let the ideas build on each other you will find that after spending time going over the various iterations, that it will be much easier to get those ideas into 3D on your MCAD system.

Always have a note book with you, to capture your thoughts. You may see a mechanical design that intrigues you, and reviewing and getting it sketched may spark some thought towards a design solution.

I have sketched ideas my whole life, perhaps to help me remember, or for further thought. As anyone who has written a paper knows, it is good to get it written, then let it sit for awhile. You will be thinking about what you wrote, and how well you are getting your subject across to the reader. When you pick up the paper and begin reading, you will find that there will be additions and corrections that will be obvious, making your subject come alive to the reader. You will experience the same with sketching your ideas. Your mind goes over thoughts sketched on the paper, and begins the thought process all over.

Have you had the opportunity to use strain gages in your design verification process? Early in my career I had the opportunity to work in a design analysis and testing group. I had been in the road grader product design engineering group, working on a new grader, specifically a hydraulic powered front wheel drive assembly. The design analysis group needed someone to help in the analysis, and then verification using strain gages. Now, I had several courses in college relating to and application of strain gages, but this was going to be the first real world application for me.

ScreenHunter_05 May. 05 10.38Galion Grader analysis

Our department engineering manager, Lazlo Keves, gave me an opportunity to practice and learn the protocols for mounting, wiring, connecting, reading the gages, and gathering data. I had worked on the design of a new crane, and the outriggers were ready to be gaged and loaded.

Galion 150 P-CScreenHunter_08 May. 05 16.57

I went through my calculation sheets, and sketches and determined where I wanted to place the gages. These were single element gages due to the fact where I was going to place them the strain was in line with the outrigger body and easy to determine orientation.

ScreenHunter_09 May. 05 17.01

I had performed numerous design calculations on a variety of parts and welded structures, but this was the first time that I had my calculations checked with real world measured strain conditions. My partner positioned the crane, lowered the outriggers, and prepared to lift the designated load. He then lifted the load off the ground, while I monitored the gages. The indicated strain was within about 5% of what I had calculated, in the gage location on the outriggers.

Lazlo took me aside and reviewed my calculation, the strain gage installation, and the results. He told me that considering all the variations that could effect the hand calculations, 5% was considered acceptable. Most design margins are somewhat larger, and the main idea behind any mechanical design and load analysis was to account for the major variances that have the most effect.

The strain that the gage indicates is true strain on the surface of the object. Then, the engineering stress value is calculated using the modulus of elasticity, with the equation; clip_image002, which solved for stress: clip_image002[4]. We then use the stress value in our design analysis efforts to meet our design margins and project goals. And, there are variations of the section, and assumed load application. All of these variables need to be considered during the design process.

As a mechanical engineer, if you get the chance to be involved with the strain gage testing of your design, take it. You will develop an appreciation for all the variables in the design process, and be better at identifying what is most applicable to your design analysis. It is very satisfying, predicting how a structure will respond to a given load, and then see that effort verified with real world loads and the associated strains.

The Wall.

…I just found this…my sweet wife was cleaning out our basement and found an old box of things I had saved. I wrote this 30 years ago…I scanned it so you could see the all the holes made by the board pins when I stuck it up over my desk at work. I wanted to share what I wrote because it is just as appropriate now as ever…

The Wall

…Talk me out of this.

Bob Lutz was a leader in the automotive design world. Both Chrysler and the old GM benefited from his vision and drive. I read that he had a sign on his office wall, "Often wrong, Seldom in doubt". I like mentioning this because as an engineering leader, you have your hands on the wheel steering your group toward a desired objective. As a leader, your team looks to you to know where to direct effort, and know we are the right path. You’re decisions and results are out there for everyone to judge and appreciate. But, you don’t know everything.
As a leader, it is OK to change your mind when new information about the challenge solution comes around. Letting yourself, and your engineering staff know that, is important to the success of the project. They know who is responsible and accountable for the departments success, and they also need to know that you are open to discussion on the projects many challenges. You steer with conviction, and every now then, you adjust your course.
That is when I come to “…Talk me out of this”. I will admit to having strong opinions about a design once I have decided on the path. Experienced engineers, using analysis and visual renderings, will determine the best solution given a variety of inputs. I have developed an ability to “see” the final product based on my design decisions. This vision needs to be shared with the design team, so they will move toward the same objective. And, this is when I enjoy engineering work the most. Challenging the design team to “talk me out of this” decision, drives your team members to sell their vision. They have to do their due diligence in determining if an alternate design satisfies the objective. They come to you, and the team, with their design solution and explain why this better and suggest a course correction. When you, as the project leader, recognize and appreciate that their solution makes sense, you adjust course. That is what leadership is all about…it may appear that you are “Often wrong”, but you are “Seldom in doubt” on the success of the project. When you have a team of engineers and designers, working together like this, they will be an incredibly effective design engine.

“The Design of Design”

I have been reading a really interesting book on design management by Frederick P. Brooks, Jr. The Design of Design. Chapter 6 covers "Collaboration in Design". He makes some interesting observations, and points that make sense. Especially about two-person design teams.

In the chapter, on page 81, “Two-Person Teams Are Magical”, he notes…

“The typical dynamics of two-person design collaboration seem different from those of multi-person design and solo design. Two people will interchange ideas rapidly and informally, with neither a protocol as to who has the floor nor domination by one partner. Each holds the floor for short bursts. The process switches rapidly among micro-sessions of proposal, review, and resolution.There is typically a single thread of idea development, without the maintenance of separate individual threads of thought as in multi-person discussions. Two pencils may move over the same paper with neither collision nor contradiction”

In my experience whether using paper and pen, or a large white board, two-person teams are incredibly efficient at working through very tough challenges. I have personally witnessed engineers and designers coming out of their shell, so to speak, working together to solve a problem, or work through an idea. This has been the pleasure in engineering for me. Working alone once the path has been established, is just easier when you know you have a partner that will work with you in the ideation phase of solving the issue at hand. Once you experience the feeling of working in a two-person team, you want to keep that going.

I have had this saying up over my office for over 30 years. It is a mindset. You set yourself to do the best engineering job that is possible given your talent, tools and the time allowed. We can discuss the time it takes to do your engineering job right, meaning right the first time, but management is always pushing engineering, that is a given. The cost to the company, and to you, can be very high when engineering has not had adequate time to investigate, and iterate through a series of ideas to solve the design challenges in the most correct, cost effective way.

I have had managers take exception to the above statement…as an affront to what they are charged in doing. That has never been my point. Given the challenge statement and the solutions offered, it takes time to get it right, so those engineers can move on to the next project. Everyone has probably heard “the devil is in the details”. And, he can make your life very difficult when those details are not attended to, or forgotten in the rush. Adequate planning, a defined project scope, and design engineering experience will address most issues, as the project design challenges are managed and executed in a timely, cost effective manner.

Just getting this started…

Good Morning…

I am going to share experience and insights that I have learned from 35 years in the engineering field. There are so many great reference sites for engineering and I will talk about the list of sites I use on a regular basis. I also want to direct some traffic to my company website…

Mike Shipulski has a great site discussing a variety of engineering challenges. He shares his insight from years of experience.
Shipulski On Design has a wealth of articles and links for engineering information.